TWI699553B - Optical imaging lens, imaging device and electronic device having the same - Google Patents

Abstract

An optical imaging lens including, in order from an object side to an image side, a first lens having negative refractive power, a second lens having positive refractive power, a meniscus third lens having positive refractive power, an aperture stop, a fourth lens having positive refractive power and a fifth lens having negative refractive power. The first lens includes an image-side surface being concave; the second lens includes an object-side surface being convex; the third lens includes an object-side surface being concave and an image-side surface being convex; the fourth lens includes an object-side surface and an image-side surface which are both convex; the fifth lens includes an object-side surface being concave and an image-side surface being convex. The fourth lens and the fifth lens are adhered to form a cemented lens. The imaging lens includes a total of five elements. When specific conditions are satisfied, it is favorable to provide a compact, wide-angle imaging lens capable of capturing good quality images.

Description

Optical camera lens group, imaging device and electronic device

The present invention relates to an optical camera lens group and imaging device, and particularly relates to an optical camera lens group and imaging device suitable for automotive photographic electronic devices or surveillance camera systems.

In recent years, due to the popularization of digital electronic products, including digital cameras, notebook computers, mobile phones, tablets, etc., the optical lens modules have flourished. In order to be suitable for various purposes, such as smart phones, sports cameras, driving recorders, reversing cameras, and home surveillance photography equipment, the quality requirements for optical lens modules are also increasing.

In addition to the gradual development towards miniaturization, optical lens modules also require a wider camera field of view and good imaging quality. However, increasing the imaging viewing angle of the optical lens module often results in an increase in the total length of the lens group (larger volume), or makes it difficult to correct aberrations. Take US Patent No. 7,623,305 as an example, which includes a first lens group with negative refractive power, an aperture, and a second lens group with positive refractive power; the first lens group includes a first lens with negative refractive power and a positive refractive power The second lens; the second lens group includes a third lens with positive refractive power, a fourth lens with negative refractive power and a fifth lens with positive refractive power. Although the optical lens assembly structure disclosed in this patent can effectively reduce the distortion of the lens imaging, its shooting angle of view can only reach about 70 degrees, which cannot meet the needs of today's consumers.

Therefore, how to provide a small optical lens module with a wide viewing angle and good imaging quality has become an urgent problem for those in this technical field.

1.68，Nd4

1.68，Nd5

1.68；Vd4+Vd5<100；0.04<(AT23+AT34)/TT25<0.16；1.75<f23/EFL<3.3；Nd4<Nd5；Vd4>Vd5；以及5<TTL/ImgH<7。 Therefore, in order to solve the above-mentioned problems, the present invention provides an optical imaging lens group, which sequentially includes a first lens, a second lens, a third lens, an aperture, a fourth lens, and a fifth lens from the object side to the image side. Among them, the first lens has negative refractive power and its image side surface is concave; the second lens has positive refractive power and its object side surface is convex; the third lens has positive refractive power, its object side surface is concave and the image side surface is convex; The four lenses have positive refractive power, and both the object side and the image side are convex; the fifth lens has negative refractive power, the object side is concave, and the image side is convex; the fourth and fifth lenses are cemented lenses; this optical camera The total number of lenses in the lens group is five; the refractive index of the second lens is Nd2, the refractive index of the fourth lens is Nd4, and the refractive index of the fifth lens is Nd5; the dispersion coefficients of the fourth lens and the fifth lens are Vd4 and respectively Vd5; the distance from the image side of the second lens to the object side of the third lens on the optical axis is AT23; the distance from the image side of the third lens to the object side of the fourth lens on the optical axis is AT34; The distance from the object side to the image side of the fifth lens on the optical axis is TT25; the combined focal length of the second lens and the third lens is f23, and the effective focal length of the optical camera lens group is EFL, and the first lens from the object side to the optical The distance between the imaging surface of the imaging lens group on the optical axis is TTL, and the maximum image height of the optical imaging lens group on the imaging surface is ImgH. This optical imaging lens group satisfies the following conditions: Nd2

1.68, Nd4

1.68, Nd5

1.68; Vd4+Vd5<100;0.04<(AT23+AT34)/TT25<0.16;1.75<f23/EFL<3.3;Nd4<Nd5;Vd4>Vd5; and 5<TTL/ImgH<7.

According to an embodiment of the present invention, the optical imaging lens group satisfies the following condition: 0.7<f23/f45<1.3; where f45 is the combined focal length of the fourth lens and the fifth lens.

1.68，Nd4

1.68，Nd5

1.68；Vd4+Vd5<100；-0.01<R2/R1<0.03；以及4<f123/EFL<20。 The present invention further provides an optical imaging lens group, which includes a first lens, a second lens, a third lens, an aperture, a fourth lens, and a fifth lens in sequence from the object side to the image side. Among them, the first lens has negative refractive power and its image side surface is concave; the second lens has positive refractive power and its object side surface is convex; the third lens has positive refractive power, its object side surface is concave and the image side surface is convex; The combined focal length of the first lens to the third lens is positive; the fourth lens has positive refractive power, and both the object side and the image side are convex; the fifth lens has negative refractive power, the object side is concave and the image side is convex; The four lenses and the fifth lens are cemented lenses; the total number of lenses in this optical imaging lens group is five; the refractive index of the second lens is Nd2, the refractive index of the fourth lens is Nd4, and the refractive index of the fifth lens is Nd5; The dispersion coefficients of the fourth lens and the fifth lens are Vd4 and Vd5, respectively; the radii of curvature of the object side and the image side of the first lens are R1 and R2 respectively; the combined focal length of the first lens, the second lens and the third lens is f123, The effective focal length of this optical camera lens group is EFL; this optical camera lens group meets the following conditions: Nd2

1.68, Nd4

1.68, Nd5

1.68; Vd4+Vd5<100;-0.01<R2/R1<0.03; and 4<f123/EFL<20.

According to an embodiment of the present invention, the optical imaging lens group satisfies the following conditions: 0.04<(AT23+AT34)/TT25<0.16; where AT23 is the distance between the image side of the second lens and the object side of the third lens on the optical axis For distance, AT34 is the distance from the image side of the third lens to the object side of the fourth lens on the optical axis, and TT25 is the distance from the object side of the second lens to the fifth lens on the optical axis.

According to an embodiment of the present invention, the optical imaging lens group satisfies the following conditions: 1.75<f23/EFL<3.3; where f23 is the combined focal length of the second lens and the three lenses.

According to an embodiment of the present invention, the optical imaging lens group satisfies the following conditions: -1<R8/EFL<-0.6; where R8 is the radius of curvature of the image side surface of the fourth lens.

According to an embodiment of the present invention, the optical imaging lens group satisfies the following conditions: 0.4<AT23/(|Sag4|+|Sag5|)<3.5; where Sag4 is the intersection of the second lens image side surface and the optical axis to its The horizontal distance from the position of the maximum effective radius of the image side, Sag5 is the horizontal distance from the intersection of the object side of the third lens with the optical axis to the position of the maximum effective radius of the third lens.

According to an embodiment of the present invention, the third lens satisfies the following conditions: 5<f3/EFL<12; and 0.6<CT3/EFL<1.2; where f3 is the focal length of the third lens, and CT3 is the focal length of the third lens thickness.

According to an embodiment of the present invention, the third lens further satisfies the following condition: Nd3<1.6; where Nd3 is the refractive index of the third lens.

According to an embodiment of the present invention, the optical imaging lens group satisfies the following conditions: -1.6<f1/EFL<-1; where f1 is the focal length of the first lens.

According to an embodiment of the present invention, the image side surface of the second lens is convex.

According to an embodiment of the present invention, the second lens satisfies the following conditions: 0.15<(C3+C4)/(C3-C4)<1.2; where C3 is the curvature of the object side surface of the second lens, and C4 is the second lens The curvature of the mirror image side.

According to an embodiment of the present invention, the third lens satisfies the following conditions: -105<(C5+C6)/(C5-C6)<-5; where C5 is the curvature of the object side of the third lens, and C6 is the The curvature of the side of the three-lens image.

According to an embodiment of the present invention, the third lens further satisfies the following condition: -12<(C5+C6)/(C5-C6)<-5.

According to an embodiment of the present invention, the optical imaging lens group further satisfies the following condition: 5<f3/EFL<8.

According to an embodiment of the present invention, the optical imaging lens group satisfies the following conditions: 0.4<(AT12+AT23)/EFL<1.7; where AT12 is the distance between the image side of the first lens and the object side of the second lens on the optical axis Distance, AT23 is the distance on the optical axis from the image side of the second lens to the object side of the third lens.

The present invention further provides an imaging device, which includes the aforementioned optical camera lens group and an image sensor element.

The present invention further provides an electronic device, which includes the aforementioned imaging device.

100, 200, 300, 400, 500, 600, 700, 800, 900, 1000: optical camera lens group

110, 210, 310, 410, 510, 610, 710, 810, 910, 1010: first lens

120, 220, 320, 420, 520, 620, 720, 820, 920, 1020: second lens

130, 230, 330, 430, 530, 630, 730, 830, 930, 1030: third lens

140, 240, 340, 440, 540, 640, 740, 840, 940, 1040: fourth lens

150, 250, 350, 450, 550, 650, 750, 850, 950, 1050: fifth lens

160, 260, 360, 460, 560, 660, 760, 860, 960, 1060: filter element

170, 270, 370, 470, 570, 670, 770, 870, 970, 1070: imaging surface

111, 211, 311, 411, 511, 611, 711, 811, 911, 1011: the object side of the first lens

112, 212, 312, 412, 512, 612, 712, 812, 912, 1012: the side of the image of the first lens

121, 221, 321, 421, 521, 621, 721, 821, 921, 1021: the object side of the second lens

122, 222, 322, 422, 522, 622, 722, 822, 922, 1022: the image side of the second lens

131, 231, 331, 431, 531, 631, 731, 831, 931, 1031: the object side of the third lens

132, 232, 332, 432, 532, 632, 732, 832, 932, 1032: the image side of the third lens

141, 241, 341, 441, 541, 641, 741, 841, 941, 1041: the object side of the fourth lens

142, 242, 342, 442, 542, 642, 742, 842, 942, 1042: the side of the image of the fourth lens

151, 251, 351, 451, 551, 651, 751, 851, 951, 1051: the object side of the fifth lens

152, 252, 352, 452, 552, 652, 752, 852, 952, 1052: the image side of the fifth lens

161, 162, 261, 262, 361, 362, 461, 462, 561, 562, 661, 662, 761, 762, 861, 862, 961, 962, 1061, 1062: the second surface of the filter element

101, 201, 301, 401, 501, 601, 701, 801, 901, 1001: image sensor

A: The intersection of the lens object side and the optical axis

B: The position of the maximum effective radius of the lens object side

I: Optical axis

Sag: Concavity value of lens surface

ST: aperture

[FIG. 1A] is a schematic diagram of the optical imaging lens group of the first embodiment of the present invention; [FIG. 1B] is the longitudinal spherical aberration diagram, astigmatic aberration diagram and distortion aberration of the first embodiment of the present invention in order from left to right Figure; [Figure 2A] is a schematic diagram of the optical imaging lens group of the second embodiment of the present invention; [Figure 2B] from left to right is the longitudinal spherical aberration diagram, astigmatic aberration diagram and distortion of the second embodiment of the present invention in order Aberration diagram; [FIG. 3A] is a schematic diagram of the optical imaging lens group of the third embodiment of the present invention; [FIG. 3B] is the longitudinal spherical aberration diagram and astigmatic aberration diagram of the third embodiment of the present invention in order from left to right And aberration diagrams; [FIG. 4A] is a schematic diagram of an optical imaging lens group according to a fourth embodiment of the present invention; [FIG. 4B] From left to right are longitudinal spherical aberration diagrams, astigmatic aberration diagrams, and distortion aberration diagrams of the fourth embodiment of the present invention; [FIG. 5A] is the optical imaging lens assembly of the fifth embodiment of the present invention Schematic diagram; [Fig. 5B] from left to right are longitudinal spherical aberration diagrams, astigmatic aberration diagrams, and distortion aberration diagrams of the fifth embodiment of the present invention; [Fig. 6A] is the optical camera of the sixth embodiment of the present invention Schematic diagram of the lens group; [Fig. 6B] is the longitudinal spherical aberration diagram, astigmatic aberration diagram and distortion diagram of the sixth embodiment of the present invention from left to right; [Fig. 7A] is the seventh embodiment of the present invention Schematic diagram of the optical camera lens group; [Fig. 7B] is the longitudinal spherical aberration diagram, astigmatic aberration diagram and distortion diagram of the seventh embodiment of the present invention from left to right; [Fig. 8A] is the eighth embodiment of the present invention Example of the schematic diagram of the optical camera lens group; [Figure 8B] from left to right are the longitudinal spherical aberration diagram, astigmatic aberration diagram and distortion diagram of the eighth embodiment of the present invention; [Figure 9A] is the first embodiment of the present invention Schematic diagram of the optical imaging lens group of the ninth embodiment; [Figure 9B] is the longitudinal spherical aberration diagram, the astigmatic aberration diagram and the distortion aberration diagram of the ninth embodiment of the present invention from left to right; [Figure 10A] is the diagram A schematic diagram of the optical imaging lens group of the tenth embodiment of the present invention; [FIG. 10B] From left to right are the longitudinal spherical aberration diagrams, astigmatic aberration diagrams, and distortion aberration diagrams of the tenth embodiment of the present invention; and [FIG. 11 ] Is a schematic diagram of the sag value (Sag) of the lens surface of the embodiment of the present invention.

The invention provides an optical imaging lens group, which includes a first lens, a second lens, a third lens, an aperture, a fourth lens, and a fifth lens in sequence from the object side to the image side. The first lens to the third lens constitute a front lens group with positive refractive power, where the first lens has negative refractive power and its image side surface is concave; the second lens has positive refractive power and its object side surface is convex; the third lens has For positive refractive power, the object side is concave and the image side is convex. The fourth lens and the fifth lens constitute a rear lens group with positive refractive power, and the image side surface of the fourth lens and the object side surface of the fifth lens are bonded to form a cemented lens; wherein the fourth lens has positive refractive power, which Both the object side and the image side are convex; the fifth lens has negative refractive power, the object side is concave, and the image side is convex. The total number of lenses in this optical imaging lens group is five.

In the following embodiments, the lenses of the optical imaging lens group can be made of glass or plastic materials, and are not limited to the materials listed in the embodiments. In the embodiment of the present invention, each lens includes an object side facing the object and an image side facing the imaging surface.

The first lens has a negative refractive power, and its image side surface is a concave surface to increase the light receiving range, so that the entire optical imaging lens group can have a larger field of view. The second lens and the third lens have positive refractive power, as components for adjusting the optical path, so that the divergent beam formed by the incident light after passing through the first lens is refracted by the second lens and the third lens to form a closer The beam of the optical axis.

The fourth lens and the fifth lens of the rear lens group are a cemented lens, which includes a high dispersion coefficient lens and a low dispersion coefficient lens to eliminate chromatic aberrations. In the content of this specification, a high dispersion coefficient lens refers to a lens with a dispersion coefficient greater than or equal to 50, and a low dispersion coefficient lens refers to a lens with a dispersion coefficient less than 50. The dispersion coefficient of the fourth lens is Vd4, and the dispersion coefficient of the fifth lens is Vd5, which satisfies the following relationship: Vd4+Vd5<100 (1);

第二透鏡像側面至第三透鏡物側面在光軸上的距離為AT23，第三透鏡像側面至第四透鏡物側面在光軸上的距離為AT34，而第二透鏡物側面至第五透鏡像側面在光軸上的距離為TT25，係滿足以下關係式：0.04<(AT23+AT34)/TT25<0.16 (3)；藉由滿足關係式(3)的條件，有利於修正光學攝像透鏡組之球面像差、場曲像差及彗差。 The optical imaging lens group has at least three lenses with higher refractive index, which is beneficial to reduce the aberration of the optical imaging lens group. Among them, the refractive index of the second lens is Nd2, the refractive index of the fourth lens is Nd4 and the refractive index of the fifth lens is Nd5, which satisfy the following relationship:

The distance from the image side of the second lens to the object side of the third lens on the optical axis is AT23, the distance from the image side of the third lens to the object side of the fourth lens on the optical axis is AT34, and the distance from the object side of the second lens to the fifth lens The distance of the mirror image side on the optical axis is TT25, which satisfies the following relationship: 0.04<(AT23+AT34)/TT25<0.16 (3); by satisfying the condition of the relationship (3), it is beneficial to correct the optical camera lens group The spherical aberration, curvature of field and coma.

The combined focal length of the second lens and the third lens is f23, and the effective focal length of the optical imaging lens group is EFL, which satisfies the following relationship: 1.75<f23/EFL<3.3 (4); by satisfying the relationship (4) The conditions are conducive to reducing the volume of the optical imaging lens group while maintaining good optical performance. If f23/EFL exceeds the upper limit or lower limit of the formula (4), the aberration is more difficult to correct.

The thickness of the third lens is CT3, the focal length is f3, and the effective focal length of the optical imaging lens group satisfies the following relationship: 0.6<CT3/EFL<1.2 (5); and 5<f3/EFL<12 ( 6); By satisfying the relationship (5), the third lens is a thick meniscus lens, and satisfying the relationship (6), the third lens has a longer focal length, which helps to correct the field curvature of the optical imaging lens group Aberration.

Further, the third lens satisfies the following relationship: 5<f3/EFL<8 (7).

Further, the refractive index of the third lens is Nd3, which satisfies the following relational expression: Nd3<1.6 (8); by satisfying the relational expression (8), it is advantageous to select an appropriate third lens material and further reduce the optical imaging lens The purpose of the field curvature aberration.

The radius of curvature of the cemented surface of the fourth lens and the fifth lens is R8, which and the effective focal length EFL of the optical imaging lens group satisfy the following relationship: -1<R8/EFL<-0.6 (9 ); By satisfying the relationship (9), it is beneficial to correct the chromatic aberration of the optical imaging lens group. When R8/EFL is lower than the lower limit of the relationship (9), the field curvature aberration of the optical imaging lens group will become larger; when R8/EFL is higher than the upper limit of the relationship (9), the optical imaging lens The chromatic aberration correction of the group is insufficient.

The combined focal length of the fourth lens and the fifth lens is f45, and the combined focal length of the fourth lens and the fifth lens is f23, and the following relationship is satisfied: 0.7<f23/f45<1.3 (10).

The optical imaging lens group further satisfies the following relational expressions: Nd4<Nd5 (11); Vd4>Vd5 (12); and 5<TTL/ImgH<7 (13); by satisfying the relational expressions (11) to (13) The conditions are conducive to the production of an optical imaging lens group with visible light as the main light source, which can effectively correct chromatic aberrations and maintain the miniaturization of the lens group.

The focal length of the first lens is f1, and it satisfies the following relationship with the effective focal length EFL of the optical imaging lens group: -1.6<f1/EFL<-1 (14).

The horizontal distance from the intersection of the image side surface of the second lens and the optical axis to the position of the maximum effective radius of the image side is Sag4, and the horizontal distance from the intersection point of the object side of the third lens and the optical axis to the position of the maximum effective radius of the object side is Sag5, and the distance between the image side of the second lens and the object side of the third lens on the optical axis is AT23, which satisfies the following relationship: 0.4<AT23/(|Sag4|+|Sag5|)<3.5 (15); The curvature of the object side of the second lens is C3, and the curvature of the image side is C4, which satisfies the following relationship: 0.15<(C3+C4)/(C3-C4)<1.2 (16).

The curvature of the object side surface of the third lens is C5 and the curvature of the image side surface is C6, which satisfies the following relationship: -105<(C5+C6)/(C5-C6)<-5 (17); further, The third lens satisfies the following relationship: -12<(C5+C6)/(C5-C6)<-5 (18).

Further, the image side surface of the second lens is convex.

The distance on the optical axis from the image side surface of the first lens to the object side surface of the second lens is AT12, and the distance on the optical axis from the image side surface of the second lens to the object side surface of the third lens is AT23. The effective focal length EFL satisfies the following relationship: 0.4<(AT12+AT23)/EFL<1.7 (19); in addition, the curvature radius of the first lens of the optical camera lens group is R1 and the curvature radius of the image side Is R2, which satisfies the following relationship: -0.01<R2/R1<0.03 (20); By satisfying the relational expression (20), it is beneficial to receive large-angle incident light and increase the field of view of the optical imaging lens group.

The combined focal length of the first lens, the second lens and the third lens is f123, which meets the following relationship with the effective focal length EFL of the optical camera lens group: 4<f123/EFL<20 (21); Further satisfying the relational expression (21) helps to form a lens group with a long focal length (that is, a weak refractive power), which can reduce the incident light angle on the surface of the fourth lens and reduce aberrations.

Refer to FIG. 11, which is a schematic diagram of the sag value (Sag) of the lens surface of the embodiment of the present invention. FIG. 11 is an example of the depression on the object side of a lens. As shown in the figure, the intersection of the object side of the lens and the optical axis I is point A, and the position of the maximum effective radius on the object side is point B, and the horizontal distance from point A to point B is defined as that of the lens object side Sag value.

First embodiment

1A and FIG. 1B, FIG. 1A is a schematic diagram of an optical imaging lens group according to a first embodiment of the present invention. FIG. 1B shows the longitudinal spherical aberration diagram (Longitudinal Spherical Aberration), the astigmatism diagram (Astigmatism) and the distortion diagram (Distortion) of the first embodiment of the present invention in order from left to right.

As shown in FIG. 1A, the optical imaging lens group 100 of the first embodiment includes a first lens 110 with negative refractive power, a second lens 120 with positive refractive power, a third lens 130 with positive refractive power, an aperture ST, The fourth lens 140 with positive refractive power and the fifth lens 150 with negative refractive power. Among them, the first lens 110, the second lens 120 and the third lens 130 constitute a front lens group with positive refractive power (not shown), and the fourth lens 140 and the fifth lens 150 constitute a rear lens group with positive refractive power (not shown) Label). The optical imaging lens group 100 of the first embodiment may further include a filter element 160 and an imaging surface 170. Wherein, the filter element 160 is disposed between the fifth lens 150 and the imaging surface 170. On the imaging surface 170, an image sensing element 101 can be further provided to form an imaging device (not labeled).

The first lens 110 has a negative refractive power, the object side surface 111 is a convex surface, the image side surface 112 is a concave surface, and both the object side surface 111 and the image side surface 112 are spherical surfaces. The first lens 11 is made of glass material.

The second lens 120 has a positive refractive power, the object side surface 121 is a convex surface, the image side surface 122 is a convex surface, and both the object side surface 121 and the image side surface 122 are spherical surfaces. The second lens 120 is made of glass material.

The third lens 130 has positive refractive power, the object side surface 131 is concave, the image side surface 132 is convex, and both the object side surface 131 and the image side surface 132 are spherical surfaces. The third lens 130 is made of glass material.

The fourth lens 140 has a positive refractive power, the object side surface 141 is a convex surface, the image side surface 142 is a convex surface, and both the object side surface 141 and the image side surface 142 are spherical surfaces. The fourth lens 140 is made of glass material.

The fifth lens 150 has a negative refractive power, the object side surface 151 is a concave surface, the image side surface 152 is a convex surface, and both the object side surface 151 and the image side surface 152 are spherical surfaces. The fifth lens 150 is made of glass material. The image side surface 142 of the fourth lens 140 and the object side surface 151 of the fifth lens 150 are bonded to each other to form a cemented lens.

The filter element 160 is disposed between the fifth lens 150 and the imaging surface 170, and the two surfaces 161 and 162 are flat surfaces, and the material is glass.

The image sensor 101 is, for example, a Charge-Coupled Device (CCD) Image Sensor or a complementary metal oxide semiconductor sensor (CMOS Image Sensor).

Please refer to Table 1 below, which is the detailed optical data of the optical imaging lens group 100 according to the first embodiment of the present invention. Wherein, the object side 111 of the first lens 110 is designated as the surface 111, the image side 112 is designated as the surface 112, and the other lens surfaces are deduced by analogy. The value in the distance field in the table represents the surface The distance to the next surface on the optical axis I, for example, the distance from the object side 111 to the image side 112 of the first lens 110 is 0.5 mm, which means that the thickness of the first lens 110 is 0.5 mm. The distance from the image side 112 of the first lens 110 to the object side 121 of the second lens 120 is 0.932 mm. Others can be deduced by analogy, and will not be repeated below. In the first embodiment, the effective focal length of the optical camera lens group 100 is EFL, the aperture value (F-number) is Fno, and half of the maximum angle of view of the overall optical camera lens group 100 is HFOV (Half Field of View), and the values are also listed In Table 1.

In the first embodiment, the dispersion coefficient of the fourth lens 140 is Vd4, and the dispersion coefficient of the fifth lens 150 is Vd5, and the relationship is Vd4+Vd5=80.

In the first embodiment, the refractive index of the second lens 120 is Nd2, the refractive index of the fourth lens 140 is Nd4, and the refractive index of the fifth lens 150 is Nd5. The relationship is Nd2=1.839, Nd4=1.700, Nd5= 1.855.

In the first embodiment, the distance between the image side 122 of the second lens 120 and the object side 131 of the third lens 130 on the optical axis is AT23, and the distance between the image side 132 of the third lens 130 and the object side 141 of the fourth lens 140 on the optical axis The distance is AT34, and the distance from the object side 121 of the second lens 120 to the image side 152 of the fifth lens 150 on the optical axis is TT25, and the relationship is (AT23+AT34)/TT25=0.05.

In the first embodiment, the combined focal length of the second lens 120 and the third lens 130 is f23, and the relationship between it and the effective focal length EFL of the overall optical imaging lens group 100 is f23/EFL=1.90.

In the first embodiment, the thickness of the third lens 130 is CT3 and the focal length is f3, and the relationship between it and the effective focal length EFL of the overall optical imaging lens group 100 is CT3/EFL=0.84, f3/EFL=5.13.

In the first embodiment, the refractive index of the third lens 130 is Nd3, and its relational expression is Nd3=1.534.

In the first embodiment, the radius of curvature of the cemented surface (surface 142 and surface 151) of the fourth lens 140 and the fifth lens 150 is R8, and the relationship between it and the effective focal length EFL of the optical imaging lens group 100 is R8 /EFL=-0.84.

In the first embodiment, the combined focal length of the second lens 120 and the third lens 130 is f23, and the combined focal length of the fourth lens 140 and the fifth lens 150 is f45, and the relationship is f23/f45=0.84.

In the first embodiment, the distance from the object side 111 of the first lens 110 to the imaging surface 170 on the optical axis I (Total Track Length) is the total length TTL, and the image sensor 101 is effective on the imaging surface 170 One half of the diagonal of the sensing area is the maximum image height ImgH (Image Height), and the relational expression is TTL/ImgH=5.63.

In the first embodiment, the focal length of the first lens 110 is f1, and the relationship between it and the effective focal length EFL of the optical imaging lens group 100 is f1/EFL=-1.07.

In the first embodiment, the horizontal distance from the intersection of the image side 122 of the second lens 120 and the optical axis I to the position of the maximum effective radius on the image side 122 is Sag4, and the distance between the object side 131 of the third lens 130 and the optical axis I The horizontal distance from the point of intersection to the position of the maximum effective radius of the object side 131 is Sag5, and the relationship between the distance AT23 on the optical axis from the image side 122 of the second lens 120 to the object side 131 of the third lens 130 is AT23/(|Sag4| +|Sag5|)=0.70.

In the first embodiment, the curvature of the object side 121 of the second lens 120 is C3, and the curvature of the image side 122 is C4, and the relationship is (C3+C4)/(C3-C4)=0.37.

In the first embodiment, the curvature of the object side surface 131 of the third lens 130 is C5 and the curvature of the image side surface 132 is C6, and the relationship is (C5+C6)/(C5-C6)=-6.42.

In the first embodiment, the distance AT12 from the image side 112 of the first lens 110 to the object side 121 of the second lens 120 on the optical axis is the same as the distance between the image side 122 of the second lens 120 and the object side 131 of the third lens 130 The relationship between the sum of the distance AT23 and the overall optical imaging lens group 100 is (AT12+AT23)/EFL=0.50.

In the first embodiment, the radius of curvature of the object side 111 of the first lens 110 is R1, and the radius of curvature of the image side 112 is R2, and the relationship is R2/R1=0.02.

In the first embodiment, the combined focal length of the first lens 110, the second lens 120, and the third lens 130 is f123, and the relationship between it and the effective focal length EFL of the optical imaging lens group 100 is f123/EFL=6.58.

It can be seen from the numerical values of the foregoing relational expressions that the optical imaging lens group 100 of the first embodiment satisfies the requirements of relational expressions (1) to (21).

Referring to FIG. 1B, from left to right are the longitudinal spherical aberration diagram, astigmatic aberration diagram and distortion diagram of the optical imaging lens group 100 respectively. It can be seen from the longitudinal spherical aberration diagram that the three types of off-axis rays of visible light with wavelengths of 436nm, 546nm and 656nm at different heights can be concentrated near the imaging point, and the deviation of the imaging point can be controlled within ±0.05mm. It can be seen from the astigmatic aberration diagram (wavelength 546nm) that the astigmatic aberration in the sagittal direction varies within ±0.05mm in the entire field of view; the astigmatic aberration in the meridional direction is within the entire field of view. The focal length change within ±0.02mm; and the distortion aberration can be controlled within 15%. As shown in FIG. 1B, the optical imaging lens assembly 100 of this embodiment has well corrected various aberrations, and meets the imaging quality requirements of the optical system.

Second embodiment

2A and 2B, FIG. 2A is a schematic diagram of an optical imaging lens group according to a second embodiment of the present invention. 2B is a longitudinal spherical aberration diagram (Longitudinal Spherical Aberration), an astigmatism diagram (Astigmatism), and a distortion aberration diagram (Distortion) of the second embodiment of the present invention in order from left to right.

As shown in FIG. 2A, the optical imaging lens group 200 of the second embodiment includes a first lens 210 with negative refractive power, a second lens 220 with positive refractive power, a third lens 230 with positive refractive power, an aperture ST, The fourth lens 240 has a positive refractive power and the fifth lens 250 has a negative refractive power. Among them, the first lens 210, the second lens 220, and the third lens 230 constitute a front lens group with positive refractive power (not shown), and the fourth lens 240 and the fifth lens 250 constitute a rear lens group with positive refractive power (not shown) Label). The optical imaging lens group 200 of the second embodiment may further include a filter element 260 and an imaging surface 270. Wherein, the filter element 260 is disposed between the fifth lens 250 and the imaging surface 270. On the imaging surface 270, an image sensing element 201 can be further provided to form an imaging device (not labeled).

The first lens 210 has a negative refractive power, the object side surface 211 is a convex surface, the image side surface 212 is a concave surface, and both the object side surface 211 and the image side surface 212 are spherical surfaces. The first lens 210 is made of glass material.

The second lens 220 has a positive refractive power, the object side surface 221 is a convex surface, the image side surface 222 is a convex surface, and both the object side surface 221 and the image side surface 222 are spherical surfaces. The second lens 220 is made of glass material.

The third lens 230 has a positive refractive power, the object side surface 231 is a concave surface, the image side surface 232 is a convex surface, and both the object side surface 231 and the image side surface 232 are spherical surfaces. The third lens 230 is made of glass material.

The fourth lens 240 has a positive refractive power, the object side surface 241 is a convex surface, the image side surface 242 is a convex surface, and both the object side surface 241 and the image side surface 242 are spherical surfaces. The fourth lens 240 is made of glass material.

The fifth lens 250 has a negative refractive power, the object side surface 251 is concave, the image side surface 252 is convex, and both the object side surface 251 and the image side surface 252 are spherical surfaces. The fifth lens 250 is made of glass material. The image side surface 242 of the fourth lens 240 and the object side surface 251 of the fifth lens are bonded to each other to form a cemented lens.

The filter element 260 is disposed between the fifth lens 250 and the imaging surface 270, and the two surfaces 261 and 262 are flat surfaces, and the material is glass.

The image sensor 201 is, for example, a charge-coupled device (CCD) image sensor or a complementary metal oxide semiconductor sensor (CMOS Image Sensor).

The detailed optical data of the optical imaging lens group 200 of the second embodiment are listed in Table 2.

In the second embodiment, the numerical values of the relational expressions of the optical imaging lens group 200 are listed in Table 3. It can be seen from Table 3 that the optical imaging lens group 200 of the second embodiment meets the requirements of relational expressions (1) to (21).

2B, from left to right are the longitudinal spherical aberration diagram, astigmatic aberration diagram and distortion diagram of the optical imaging lens group 200, respectively. It can be seen from the longitudinal spherical aberration diagram that the three types of off-axis rays of visible light with wavelengths of 436nm, 546nm and 656nm at different heights can be concentrated near the imaging point, and the deviation of the imaging point can be controlled within ±0.05mm. It can be seen from the astigmatic aberration diagram (wavelength 546nm) that the astigmatic aberration in the sagittal direction varies within ±0.04mm in the entire field of view; the astigmatic aberration in the meridional direction is within the entire field of view. The focal length change within ±0.02mm; and the distortion aberration can be controlled within 16%. As shown in FIG. 2B, the optical imaging lens assembly 200 of this embodiment has well corrected various aberrations, and meets the imaging quality requirements of the optical system.

The third embodiment

Referring to FIGS. 3A and 3B, FIG. 3A is a schematic diagram of an optical imaging lens group according to a third embodiment of the present invention. FIG. 3B shows the longitudinal spherical aberration diagram (Longitudinal Spherical Aberration), the astigmatism diagram (Astigmatism) and the distortion aberration diagram (Distortion) of the third embodiment of the present invention in order from left to right.

As shown in FIG. 3A, the optical imaging lens group 300 of the third embodiment includes a first lens 310 with negative refractive power, a second lens 320 with positive refractive power, and a third lens with positive refractive power. 330. Aperture ST, a fourth lens 340 with positive refractive power, and a fifth lens 350 with negative refractive power. Among them, the first lens 310, the second lens 320, and the third lens 330 constitute a front lens group with positive refractive power (not shown), and the fourth lens 340 and the fifth lens 350 constitute a rear lens group with positive refractive power (not shown) Label). The optical imaging lens group 300 of the third embodiment may further include a filter element 360 and an imaging surface 370. Wherein, the filter element 360 is disposed between the fifth lens 350 and the imaging surface 370. On the imaging surface 370, an image sensing element 301 can be further provided to form an imaging device (not labeled).

The first lens 310 has a negative refractive power, the object side surface 311 is convex, the image side surface 312 is concave, and both the object side surface 311 and the image side surface 312 are spherical surfaces. The first lens 310 is made of glass material.

The second lens 320 has a positive refractive power, the object side surface 321 is a convex surface, the image side surface 322 is a convex surface, and both the object side surface 321 and the image side surface 322 are spherical surfaces. The second lens 320 is made of glass material.

The third lens 330 has a positive refractive power, the object side surface 331 is a concave surface, the image side surface 332 is a convex surface, and both the object side surface 331 and the image side surface 332 are spherical surfaces. The third lens 330 is made of glass material.

The fourth lens 340 has positive refractive power, the object side surface 341 is convex, the image side surface 342 is convex, and both the object side surface 341 and the image side surface 342 are spherical surfaces. The fourth lens 340 is made of glass material.

The fifth lens 350 has a negative refractive power, the object side surface 351 is a concave surface, the image side surface 352 is a convex surface, and both the object side surface 351 and the image side surface 352 are spherical surfaces. The fifth lens 350 is made of glass. The image side surface 342 of the fourth lens 340 and the object side surface 351 of the fifth lens are bonded to each other to form a cemented lens.

The filter element 360 is disposed between the fifth lens 350 and the imaging surface 370, and the two surfaces 361 and 362 are flat surfaces, and the material is glass.

The image sensor 301 is, for example, a Charge-Coupled Device (CCD) Image Sensor or a complementary metal oxide semiconductor sensor (CMOS Image Sensor).

The detailed optical data of the optical imaging lens group 300 of the third embodiment are listed in Table 4.

In the third embodiment, the numerical values of the relational expressions of the optical imaging lens group 300 are listed in Table 5. It can be seen from Table 5 that the optical imaging lens group 300 of the third embodiment meets the requirements of relational expressions (1) to (21).

Referring to FIG. 3B, from left to right are the longitudinal spherical aberration diagram, astigmatic aberration diagram, and distortion diagram of the optical imaging lens group 300, respectively. It can be seen from the longitudinal spherical aberration diagram that the three types of off-axis rays of visible light with wavelengths of 436nm, 546nm, and 656nm at different heights can be concentrated near the imaging point, and the deviation of the imaging point can be controlled within ±0.06mm. It can be seen from the astigmatic aberration diagram (wavelength 546nm) that the astigmatic aberration in the sagittal direction varies within ±0.04mm in the entire field of view; the astigmatic aberration in the meridional direction is within the entire field of view. The focal length change within ±0.02mm; and the distortion aberration can be controlled within 15%. As shown in FIG. 3B, the optical imaging lens assembly 300 of this embodiment has well corrected various aberrations and meets the imaging quality requirements of the optical system.

Fourth embodiment

4A and 4B, FIG. 4A is a schematic diagram of an optical imaging lens group according to a fourth embodiment of the present invention. FIG. 4B is a longitudinal spherical aberration diagram (Longitudinal Spherical Aberration), an astigmatism diagram (Astigmatism) and a distortion aberration diagram (Distortion) of the fourth embodiment of the present invention in order from left to right.

As shown in FIG. 4A, the optical imaging lens group 400 of the fourth embodiment includes a first lens 410 with negative refractive power, a second lens 420 with positive refractive power, a third lens 430 with positive refractive power, an aperture ST, The fourth lens 440 with positive refractive power and the fifth lens 450 with negative refractive power. Among them, the first lens 410, the second lens 420, and the third lens 430 constitute a front lens group with positive refractive power (not shown), and the fourth lens 440 and the fifth lens 450 constitute a rear lens group with positive refractive power (not shown) Label). The optical imaging lens group 400 of the fourth embodiment may further include a filter element 460 and an imaging surface 470. Wherein, the filter element 460 is disposed between the fifth lens 450 and the imaging surface 470. On the imaging surface 470, an image sensing element 401 can be further provided to constitute an imaging device (not shown).

The first lens 410 has a negative refractive power, the object side surface 411 is a convex surface, the image side surface 412 is a concave surface, and both the object side surface 411 and the image side surface 412 are spherical surfaces. The first lens 410 is made of glass material.

The second lens 420 has a positive refractive power, the object side surface 421 is a convex surface, the image side surface 422 is a convex surface, and the object side surface 421 and the image side surface 422 are both spherical surfaces. The second lens 420 is made of glass material.

The third lens 430 has positive refractive power, the object side surface 431 is a concave surface, the image side surface 432 is a convex surface, and both the object side surface 431 and the image side surface 432 are spherical surfaces. The third lens 430 is made of plastic material.

The fourth lens 440 has a positive refractive power, the object side surface 441 is convex, the image side surface 442 is convex, and both the object side surface 441 and the image side surface 442 are spherical surfaces. The fourth lens 440 is made of glass material.

The fifth lens 450 has a negative refractive power, the object side surface 451 is a concave surface, the image side surface 452 is a convex surface, and both the object side surface 451 and the image side surface 452 are spherical surfaces. The fifth lens 450 is made of glass. The image side surface 442 of the fourth lens 440 and the object side surface 451 of the fifth lens are bonded to each other to form a cemented lens.

The filter element 460 is disposed between the fifth lens 450 and the imaging surface 470, and the two surfaces 461 and 462 are flat surfaces, and the material is glass.

The image sensor 401 is, for example, a charge-coupled device (CCD) image sensor or a complementary metal oxide semiconductor sensor (CMOS Image Sensor).

The detailed optical data of the optical imaging lens group 400 of the fourth embodiment are listed in Table 6.

In the fourth embodiment, the numerical values of the relational expressions of the optical imaging lens group 400 are listed in Table 7. It can be seen from Table 7 that the optical imaging lens group 400 of the fourth embodiment satisfies the requirements of relational expressions (1) to (21).

4B, from left to right are the longitudinal spherical aberration diagram, the astigmatic aberration diagram, and the distortion aberration diagram of the optical imaging lens group 400, respectively. It can be seen from the longitudinal spherical aberration diagram that the three types of off-axis rays of visible light with wavelengths of 436nm, 546nm and 656nm at different heights can be concentrated near the imaging point, and the imaging point is off The difference can be controlled within ±0.06mm. It can be seen from the astigmatic aberration diagram (wavelength 546nm) that the astigmatic aberration in the sagittal direction varies within ±0.05mm in the entire field of view; the astigmatic aberration in the meridional direction is within the entire field of view. The focal length change within ±0.02mm; and the distortion aberration can be controlled within 15%. As shown in FIG. 4B, the optical imaging lens assembly 400 of this embodiment has well corrected various aberrations, and meets the imaging quality requirements of the optical system.

Fifth embodiment

Referring to FIGS. 5A and 5B, FIG. 5A is a schematic diagram of an optical imaging lens group according to a fifth embodiment of the present invention. FIG. 5B shows the longitudinal spherical aberration diagram (Longitudinal Spherical Aberration), the astigmatism diagram (Astigmatism) and the distortion diagram (Distortion) of the fifth embodiment of the present invention in order from left to right.

As shown in FIG. 5A, the optical imaging lens group 500 of the fifth embodiment includes a first lens 510 with negative refractive power, a second lens 520 with positive refractive power, a third lens 530 with positive refractive power, an aperture ST, A fourth lens 540 with positive refractive power and a fifth lens 550 with negative refractive power. Among them, the first lens 510, the second lens 520, and the third lens 530 constitute a front lens group with positive refractive power (not shown), and the fourth lens 540 and the fifth lens 550 constitute a rear lens group with positive refractive power (not shown) Label). The optical imaging lens group 500 of the fifth embodiment may further include a filter element 560 and an imaging surface 570. Wherein, the filter element 560 is disposed between the fifth lens 550 and the imaging surface 570. On the imaging surface 570, an image sensing element 501 can be further provided to form an imaging device (not shown).

The first lens 510 has a negative refractive power, the object side surface 511 is convex, the image side surface 512 is concave, and both the object side surface 511 and the image side surface 512 are spherical surfaces. The first lens 510 is made of glass material.

The second lens 520 has a positive refractive power, the object side surface 521 is a convex surface, the image side surface 522 is a convex surface, and both the object side surface 521 and the image side surface 522 are spherical surfaces. The second lens 520 is made of glass material.

The third lens 530 has a positive refractive power, the object side surface 531 is a concave surface, the image side surface 532 is a convex surface, and both the object side surface 531 and the image side surface 532 are spherical surfaces. The third lens 530 is made of glass material.

The fourth lens 540 has a positive refractive power, the object side surface 541 is convex, the image side surface 542 is convex, and both the object side surface 541 and the image side surface 542 are spherical surfaces. The fourth lens 540 is made of glass material.

The fifth lens element 550 has negative refractive power, the object side surface 551 is concave, the image side surface 552 is convex, and both the object side surface 551 and the image side surface 552 are spherical surfaces. The fifth lens 550 is made of glass material. The image side surface 542 of the fourth lens 540 and the object side surface 551 of the fifth lens are bonded to each other to form a cemented lens.

The filter element 560 is disposed between the fifth lens 550 and the imaging surface 570, and the two surfaces 561 and 562 are flat surfaces, and the material is glass.

The image sensor 501 is, for example, a charge-coupled device (CCD) image sensor or a complementary metal oxide semiconductor sensor (CMOS Image Sensor).

The detailed optical data of the optical imaging lens group 500 of the fifth embodiment are listed in Table 8.

In the fifth embodiment, the numerical values of the relational expressions of the optical imaging lens group 500 are listed in Table 9. It can be seen from Table 9 that the optical imaging lens group 500 of the fifth embodiment satisfies the requirements of relational expressions (1) to (21).

Referring to FIG. 5B, from left to right are the longitudinal spherical aberration diagram, astigmatic aberration diagram and distortion diagram of the optical imaging lens group 500 respectively. It can be seen from the longitudinal spherical aberration diagram that the three near-infrared light 900nm, 940nm, 980nm wavelengths of off-axis light at different heights can be concentrated near the imaging point, and the imaging point deviation can be controlled within ±0.06mm. From the astigmatic aberration diagram (wavelength 940nm), it can be seen that the astigmatic aberration in the sagittal direction is within ±0.03mm in the entire field of view; the astigmatic aberration in the meridional direction is within the entire field of view. The focal length change within ±0.03mm; and the distortion aberration can be controlled within 15%. As shown in FIG. 5B, the optical imaging lens assembly 500 of this embodiment has well corrected various aberrations, and meets the imaging quality requirements of the optical system.

Sixth embodiment

Referring to FIGS. 6A and 6B, FIG. 6A is a schematic diagram of an optical imaging lens group according to a sixth embodiment of the present invention. FIG. 6B shows the longitudinal spherical aberration diagram (Longitudinal Spherical Aberration), the astigmatism diagram (Astigmatism) and the distortion diagram (Distortion) of the sixth embodiment of the present invention in order from left to right.

As shown in FIG. 6A, the optical imaging lens group 600 of the sixth embodiment includes a first lens 610 with negative refractive power, a second lens 620 with positive refractive power, a third lens 630 with positive refractive power, an aperture ST, The fourth lens 640 with positive refractive power and the fifth lens 650 with negative refractive power. Among them, the first lens 610, the second lens 620, and the third lens 630 constitute a front lens group with positive refractive power (not shown), and the fourth lens 640 and the fifth lens 650 constitute a rear lens group with positive refractive power (not shown) Label). The optical imaging lens group 600 of the sixth embodiment may further include a filter element 660 and an imaging surface 670. Wherein, the filter element 660 is disposed between the fifth lens 650 and the imaging surface 670. On the imaging surface 670, an image sensing element 601 can be further provided to form an imaging device (not labeled).

The first lens 610 has a negative refractive power, the object side surface 611 is a convex surface, the image side surface 612 is a concave surface, and the object side surface 611 and the image side surface 612 are spherical surfaces. The first lens 610 is made of glass material.

The second lens 620 has a positive refractive power, the object side surface 621 is a convex surface, the image side surface 622 is a convex surface, and both the object side surface 621 and the image side surface 622 are spherical surfaces. The second lens 620 is made of glass material.

The third lens 630 has a positive refractive power, the object side surface 631 is a concave surface, the image side surface 632 is a convex surface, and the object side surface 631 and the image side surface 632 are spherical surfaces. The third lens 630 is made of glass.

The fourth lens 640 has positive refractive power, the object side surface 641 is convex, the image side surface 642 is convex, and the object side surface 641 and the image side surface 642 are spherical surfaces. The fourth lens 640 is made of glass material.

The fifth lens 650 has a negative refractive power, the object side surface 651 is a concave surface, the image side surface 652 is a convex surface, and both the object side surface 651 and the image side surface 652 are spherical surfaces. The fifth lens 650 is made of glass material. The image side surface 642 of the fourth lens 640 and the object side surface 651 of the fifth lens are bonded to each other to form a cemented lens.

The filter element 660 is disposed between the fifth lens 650 and the imaging surface 670, and the two surfaces 661 and 662 are flat surfaces, and the material is glass.

The image sensor 601 is, for example, a Charge-Coupled Device (CCD) Image Sensor or a complementary metal oxide semiconductor sensor (CMOS Image Sensor).

The detailed optical data of the optical imaging lens group 600 of the sixth embodiment are listed in Table 10.

In the sixth embodiment, the numerical values of the relational expressions of the optical imaging lens group 600 are listed in Table 11. It can be seen from Table 11 that the optical imaging lens group 600 of the sixth embodiment meets the requirements of relational expressions (1) to (21).

Referring to FIG. 6B, from left to right, the longitudinal spherical aberration diagram, astigmatic aberration diagram and distortion diagram of the optical imaging lens group 600 are respectively shown. It can be seen from the longitudinal spherical aberration diagram that the three types of off-axis rays of visible light with wavelengths of 436nm, 546nm, and 656nm at different heights can be concentrated near the imaging point, and the deviation of the imaging point can be controlled within ±0.06mm. It can be seen from the astigmatic aberration diagram (wavelength 546nm) that the astigmatic aberration in the sagittal direction varies within ±0.05mm in the entire field of view; the astigmatic aberration in the meridional direction is within the entire field of view. The focal length change within ±0.04mm; and the distortion aberration can be controlled within 15%. As shown in FIG. 6B, the optical imaging lens assembly 600 of this embodiment has well corrected various aberrations, and meets the imaging quality requirements of the optical system.

Seventh embodiment

Referring to FIGS. 7A and 7B, FIG. 7A is a schematic diagram of an optical imaging lens group according to a seventh embodiment of the present invention. FIG. 7B shows the longitudinal spherical aberration diagram (Longitudinal Spherical Aberration), the astigmatism diagram (Astigmatism) and the distortion diagram (Distortion) of the seventh embodiment of the present invention in order from left to right.

As shown in FIG. 7A, the optical imaging lens group 700 of the seventh embodiment includes a first lens 710 with negative refractive power, a second lens 720 with positive refractive power, a third lens 730 with positive refractive power, an aperture ST, A fourth lens 740 with positive refractive power and a fifth lens 750 with negative refractive power. Among them, the first lens 710, the second lens 720 and the third lens 730 constitute a front lens group with positive refractive power (not shown), and the fourth lens 740 and the fifth lens 750 constitute a rear lens group with positive refractive power (not shown) Label). The optical imaging lens group 700 of the seventh embodiment may further include a filter element 760 and an imaging surface 770. Wherein, the filter element 760 is disposed between the fifth lens 750 and the imaging surface 770. On the imaging surface 770, an image sensing element 701 can be further provided to form an imaging device (not labeled).

The first lens 710 has a negative refractive power, the object side surface 711 is convex, the image side surface 712 is concave, and both the object side surface 711 and the image side surface 712 are spherical surfaces. The first lens 710 is made of glass material.

The second lens 720 has positive refractive power, the object side surface 721 is convex, the image side surface 722 is convex, and both the object side surface 721 and the image side surface 722 are spherical surfaces. The second lens 720 is made of glass material.

The third lens 730 has a positive refractive power, the object side surface 731 is a concave surface, the image side surface 732 is a convex surface, and both the object side surface 731 and the image side surface 732 are spherical surfaces. The third lens 730 is made of glass material.

The fourth lens 740 has a positive refractive power, the object side surface 741 is convex, the image side surface 742 is convex, and both the object side surface 741 and the image side surface 742 are spherical surfaces. The fourth lens 740 is made of glass material.

The fifth lens element 750 has negative refractive power, the object side surface 751 is concave, the image side surface 752 is convex, and both the object side surface 751 and the image side surface 752 are spherical surfaces. The fifth lens 750 is made of glass. The image side surface 742 of the fourth lens 740 and the object side surface 751 of the fifth lens are bonded to each other to form a cemented lens.

The filter element 760 is disposed between the fifth lens 750 and the imaging surface 770, and the two surfaces 761 and 762 are flat surfaces, and the material is glass.

The image sensor 701 is, for example, a Charge-Coupled Device (CCD) Image Sensor or a complementary metal oxide semiconductor sensor (CMOS Image Sensor).

The detailed optical data of the optical imaging lens group 700 of the seventh embodiment are listed in Table 12.

In the seventh embodiment, the numerical values of the relational expressions of the optical imaging lens group 700 are listed in Table 13. It can be seen from Table 13 that the optical imaging lens group 700 of the seventh embodiment satisfies the requirements of relational expressions (1) to (21).

Referring to FIG. 7B, from left to right are the longitudinal spherical aberration diagram, the astigmatic aberration diagram, and the distortion aberration diagram of the optical imaging lens group 700 respectively. It can be seen from the longitudinal spherical aberration diagram that the three types of off-axis rays of visible light with wavelengths of 436nm, 546nm, and 656nm at different heights can be concentrated near the imaging point, and the deviation of the imaging point can be controlled within ±0.06mm. It can be seen from the astigmatic aberration diagram (wavelength 546nm) that the astigmatic aberration in the sagittal direction varies within ±0.05mm in the entire field of view; the astigmatic aberration in the meridional direction is within the entire field of view. The focal length change within ±0.03mm; and the distortion aberration can be controlled within 16%. As shown in FIG. 7B, the optical imaging lens assembly 700 of this embodiment has well corrected various aberrations, and meets the imaging quality requirements of the optical system.

Eighth embodiment

Referring to FIGS. 8A and 8B, FIG. 8A is a schematic diagram of an optical imaging lens group according to an eighth embodiment of the present invention. FIG. 8B shows the longitudinal spherical aberration diagram (Longitudinal Spherical Aberration), the astigmatism diagram (Astigmatism) and the distortion diagram (Distortion) of the eighth embodiment of the present invention in order from left to right.

As shown in FIG. 8A, the optical imaging lens group 800 of the eighth embodiment includes a first lens 810 with negative refractive power, a second lens 820 with positive refractive power, a third lens 830 with positive refractive power, an aperture ST, A fourth lens 840 with positive refractive power and a fifth lens 850 with negative refractive power. Among them, the first lens 810, the second lens 820, and the third lens 830 constitute a front lens group with positive refractive power (not shown), and the fourth lens 840 and the fifth lens 850 constitute a rear lens group with positive refractive power (not shown) Label). The optical imaging lens group 800 of the eighth embodiment may further include a filter element 860 and an imaging surface 870. Wherein, the filter element 860 is disposed between the fifth lens 850 and the imaging surface 870. On the imaging surface 870, an image sensing element 801 can be further provided to form an imaging device (not shown).

The first lens 810 has a negative refractive power, the object side surface 811 is concave, the image side surface 812 is concave, and both the object side surface 811 and the image side surface 812 are spherical surfaces. The first lens 810 is made of glass material.

The second lens 820 has a positive refractive power, the object side surface 821 is a convex surface, the image side surface 822 is a concave surface, and both the object side surface 821 and the image side surface 822 are spherical surfaces. The second lens 820 is made of glass material.

The third lens 830 has a positive refractive power, the object side surface 831 is a concave surface, the image side surface 832 is a convex surface, and both the object side surface 831 and the image side surface 832 are spherical surfaces. The third lens 830 is made of glass.

The fourth lens element 840 has a positive refractive power, the object side surface 841 is convex, the image side surface 842 is convex, and both the object side surface 841 and the image side surface 842 are spherical surfaces. The fourth lens 840 is made of glass material.

The fifth lens element 850 has a negative refractive power, the object side surface 851 is a concave surface, the image side surface 852 is a convex surface, and both the object side surface 851 and the image side surface 852 are spherical surfaces. The fifth lens 850 is made of glass material. The image side surface 842 of the fourth lens 840 and the object side surface 851 of the fifth lens are bonded to each other to form a cemented lens.

The filter element 860 is disposed between the fifth lens 850 and the imaging surface 870, and the two surfaces 861 and 862 are flat surfaces, and the material is glass.

The image sensor 801 is, for example, a charge-coupled device (CCD) image sensor or a complementary metal oxide semiconductor sensor (CMOS Image Sensor).

The detailed optical data of the optical imaging lens group 800 of the eighth embodiment are listed in Table 14.

In the eighth embodiment, the numerical values of the relational expressions of the optical imaging lens group 800 are listed in Table 15. It can be seen from Table 15 that the optical imaging lens group 800 of the eighth embodiment satisfies the requirements of relational expressions (1) to (21).

Referring to FIG. 8B, from left to right are the longitudinal spherical aberration diagram, astigmatic aberration diagram, and distortion aberration diagram of the optical imaging lens group 800 respectively. It can be seen from the longitudinal spherical aberration diagram that the three types of off-axis rays of visible light with wavelengths of 436nm, 546nm, and 656nm at different heights can be concentrated near the imaging point, and the deviation of the imaging point can be controlled within ±0.08mm. It can be seen from the astigmatic aberration diagram (wavelength 546nm) that the astigmatic aberration in the sagittal direction varies within ±0.05mm in the entire field of view; the astigmatic aberration in the meridional direction is within the entire field of view. The focal length change within ±0.05mm; and the distortion aberration can be controlled within 18%. As shown in FIG. 8B, the optical imaging lens assembly 800 of this embodiment has well corrected various aberrations, and meets the imaging quality requirements of the optical system.

Ninth embodiment

Referring to FIGS. 9A and 9B, FIG. 9A is a schematic diagram of an optical imaging lens group according to a ninth embodiment of the present invention. FIG. 9B shows the longitudinal spherical aberration map (Longitudinal Spherical Aberration), the astigmatism map (Astigmatism) and the distortion aberration map (Distortion) of the ninth embodiment of the present invention in order from left to right.

As shown in FIG. 9A, the optical imaging lens group 900 of the ninth embodiment includes a first lens 910 with negative refractive power, a second lens 920 with positive refractive power, a third lens 930 with positive refractive power, an aperture ST, A fourth lens 940 with positive refractive power and a fifth lens 950 with negative refractive power. Among them, the first lens 910, the second lens 920, and the third lens 930 constitute a front lens group with positive refractive power (not shown), and the fourth lens 940 and the fifth lens 950 constitute a rear lens group with positive refractive power (not shown) Label). The optical imaging lens group 900 of the ninth embodiment may further include a filter element 960 and an imaging surface 970. Wherein, the filter element 960 is disposed between the fifth lens 950 and the imaging surface 970. On the imaging surface 970, an image sensing element 901 can be further provided to form an imaging device (not labeled).

The first lens 910 has a negative refractive power, the object side surface 911 is convex, the image side surface 912 is concave, and both the object side surface 911 and the image side surface 912 are spherical surfaces. The first lens 910 is made of glass material.

The second lens 920 has a positive refractive power, the object side surface 921 is a convex surface, the image side surface 922 is a convex surface, and both the object side surface 921 and the image side surface 922 are spherical surfaces. The second lens 920 is made of glass material.

The third lens 930 has positive refractive power, the object side surface 931 is a concave surface, the image side surface 932 is a convex surface, and both the object side surface 931 and the image side surface 932 are spherical surfaces. The third lens 930 is made of glass material.

The fourth lens 940 has a positive refractive power, the object side surface 941 is a convex surface, the image side surface 942 is a convex surface, and both the object side surface 941 and the image side surface 942 are spherical surfaces. The fourth lens 940 is made of glass material.

The fifth lens 950 has a negative refractive power, the object side surface 951 is concave, the image side surface 952 is convex, and both the object side surface 951 and the image side surface 952 are spherical surfaces. The fifth lens 950 is made of glass. The image side surface 942 of the fourth lens 940 and the object side surface 951 of the fifth lens are bonded to each other to form a cemented lens.

The filter element 960 is disposed between the fifth lens 950 and the imaging surface 970, and the two surfaces 961 and 962 are flat surfaces, and the material is glass.

The image sensor 901 is, for example, a charge-coupled device (CCD) image sensor or a complementary metal oxide semiconductor sensor (CMOS Image Sensor).

The detailed optical data of the optical imaging lens group 900 of the ninth embodiment are listed in Table 16.

In the ninth embodiment, the values of the relational expressions of the optical imaging lens group 900 are listed in Table 17. It can be seen from Table 17 that the optical imaging lens group 900 of the ninth embodiment satisfies the requirements of relational expressions (1) to (21).

Referring to FIG. 9B, from left to right are the longitudinal spherical aberration diagram, astigmatic aberration diagram, and distortion diagram of the optical imaging lens group 900, respectively. It can be seen from the longitudinal spherical aberration diagram that the three types of off-axis rays of visible light with wavelengths of 436nm, 546nm, and 656nm at different heights can be concentrated near the imaging point, and the imaging point is offset. The difference can be controlled within ±0.07mm. It can be seen from the astigmatic aberration diagram (wavelength 546nm) that the astigmatic aberration in the sagittal direction varies within ±0.04mm in the entire field of view; the astigmatic aberration in the meridional direction is within the entire field of view. The focal length change within ±0.04mm; and the distortion aberration can be controlled within 30%. As shown in FIG. 9B, the optical imaging lens group 900 of this embodiment has well corrected various aberrations and meets the imaging quality requirements of the optical system.

Tenth embodiment

10A and 10B, FIG. 10A is a schematic diagram of an optical imaging lens group according to a tenth embodiment of the present invention. FIG. 10B is a longitudinal spherical aberration diagram (Longitudinal Spherical Aberration), an astigmatism diagram (Astigmatism), and a distortion aberration diagram (Distortion) of the tenth embodiment of the present invention in order from left to right.

As shown in FIG. 10A, the optical imaging lens group 1000 of the tenth embodiment includes a first lens 1010 with negative refractive power, a second lens 1020 with positive refractive power, a third lens 1030 with positive refractive power, an aperture ST, A fourth lens 1040 with positive refractive power and a fifth lens 1050 with negative refractive power. Among them, the first lens 1010, the second lens 1020, and the third lens 1030 constitute a front lens group with positive refractive power (not shown), and the fourth lens 1040 and the fifth lens 1050 constitute a rear lens group with positive refractive power (not shown) Label). The optical imaging lens group 1000 of the tenth embodiment may further include a filter element 1060 and an imaging surface 1070. Wherein, the filter element 1060 is disposed between the fifth lens 1050 and the imaging surface 1070. On the imaging surface 1070, an image sensing element 1001 can be further provided to form an imaging device (not labeled).

The first lens 1010 has a negative refractive power, the object side surface 1011 is convex, the image side surface 1012 is concave, and both the object side surface 1011 and the image side surface 1012 are spherical surfaces. The first lens 1010 is made of glass material.

The second lens 1020 has a positive refractive power, the object side surface 1021 is convex, the image side surface 1022 is convex, and both the object side surface 1021 and the image side surface 1022 are spherical surfaces. The second lens 1020 is made of glass material.

The third lens 1030 has a positive refractive power, the object side surface 1031 is concave, the image side surface 1032 is convex, and both the object side surface 1031 and the image side surface 1032 are spherical surfaces. The third lens 1030 is made of glass material.

The fourth lens 1040 has positive refractive power, the object side surface 1041 is convex, the image side surface 1042 is convex, and both the object side surface 1041 and the image side surface 1042 are spherical surfaces. The fourth lens 1040 is made of glass material.

The fifth lens 1050 has a negative refractive power, the object side surface 1051 is concave, the image side surface 1052 is convex, and both the object side surface 1051 and the image side surface 1052 are spherical surfaces. The fifth lens 1050 is made of glass. The image side surface 1042 of the fourth lens 1040 and the object side surface 1051 of the fifth lens are bonded to each other to form a cemented lens.

The filter element 1060 is disposed between the fifth lens 1050 and the imaging surface 1070, and the two surfaces 1061 and 1062 are flat surfaces, and the material is glass.

The image sensor 1001 is, for example, a charge-coupled device (CCD) image sensor or a complementary metal oxide semiconductor sensor (CMOS Image Sensor).

The detailed optical data of the optical imaging lens group 1000 of the tenth embodiment are listed in Table 18.

In the tenth embodiment, the numerical values of the relational expressions of the optical imaging lens group 1000 are listed in Table 19. It can be seen from Table 19 that the optical imaging lens group 1000 of the tenth embodiment satisfies the requirements of relational expressions (1) to (21).

Referring to FIG. 10B, from left to right are the longitudinal spherical aberration diagram, the astigmatic aberration diagram and the distortion aberration diagram of the optical imaging lens group 1000 respectively. It can be seen from the longitudinal spherical aberration diagram that the off-axis rays of the three near-infrared light 900nm, 940nm, 980nm wavelengths at different heights can be concentrated near the imaging point, and the deviation of the imaging point can be controlled within ±0.05mm. From the astigmatic aberration diagram (wavelength 940nm), it can be seen that the astigmatic aberration in the sagittal direction varies within ±0.04mm in the entire field of view; the astigmatic aberration in the meridional direction is within the entire field of view. The focal length change within ±0.04mm; and the distortion aberration can be controlled within 15%. As shown in FIG. 10B, the optical imaging lens assembly 1000 of this embodiment has well corrected various aberrations, and meets the imaging quality requirements of the optical system.

Eleventh embodiment

The eleventh embodiment of the present invention is an imaging device. The imaging device includes the optical imaging lens group as described in the first to tenth embodiments, and an image sensor. The image sensing device is, for example, a charge-coupled device (CCD) or a complementary metal oxide semiconductor (CMOS) image sensing device. The imaging device is, for example, a camera module for car photography, a camera module for portable electronic products, or a camera module for surveillance cameras.

Twelfth embodiment

The twelfth embodiment of the present invention is an electronic device, and the electronic device includes the imaging device as in the eleventh embodiment. The electronic device is, for example, a driving recorder, a reversing camera, or a surveillance camera.

Although the present invention is described using the foregoing several embodiments, these embodiments are not intended to limit the scope of the present invention. For anyone familiar with the art, without departing from the spirit and scope of the present invention, various changes in form and details can be made with reference to the contents of the embodiments disclosed in the present invention. Therefore, it should be understood here that the present invention is subject to the scope of the following patent applications. Any changes made within the scope of the patent application or its equivalent scope shall still fall into the application of the present invention Within the scope of the patent.

100: Optical camera lens group

110: first lens

120: second lens

130: third lens

140: fourth lens

150: fifth lens

160: filter element

170: imaging surface

111: Object side of the first lens

112: The side of the image of the first lens

121: Object side of the second lens

122: side of the image of the second lens

131: Object side of the third lens

132: The image side of the third lens

141: Object side of the fourth lens

142: The image side of the fourth lens

151: Object side of the fifth lens

152: The image side of the fifth lens

161, 162: The second surface of the filter element

101: Image sensor

I: Optical axis

ST: aperture

Claims (18)

An optical imaging lens group, from the object side to the image side, includes: a first lens with negative refractive power and a concave image side surface; a second lens with positive refractive power and a convex object side surface; A meniscus-shaped third lens with positive refractive power, the object side is concave, the image side is convex; an aperture; a fourth lens with positive refractive power, the object side and the image side are both convex; and one with negative refractive power The fifth lens of Li, whose object side is concave and the image side is convex; among them, the fourth lens and the fifth lens are cemented lenses; the total number of lenses in the optical imaging lens group is five; the refraction of the second lens The refractive index of the fourth lens is Nd4, the refractive index of the fifth lens is Nd5; the dispersion coefficients of the fourth lens and the fifth lens are Vd4 and Vd5, respectively; the image side of the second lens is up to The distance from the object side of the third lens on the optical axis is AT23; the distance from the image side of the third lens to the object side of the fourth lens on the optical axis is AT34; the object side of the second lens to the first lens The distance between the image side of the five lenses on the optical axis is TT25; the combined focal length of the second lens and the third lens is f23, and the effective focal length of the optical camera lens group is EFL, and the object side of the first lens is to the optical axis. The distance of the imaging surface of the imaging lens group on the optical axis is TTL, and the maximum image height of the optical imaging lens group on the imaging surface is ImgH. This optical imaging lens group satisfies the following conditions: Nd2

1.68, Nd4

1.68, Nd5

1.68; Vd4+Vd5<100;0.04<(AT23+AT34)/TT25<0.16;1.75<f23/EFL<3.3;Nd4<Nd5;Vd4>Vd5; and 5<TTL/ImgH<7. For example, the optical imaging lens group of item 1 in the scope of patent application, wherein the optical imaging lens group satisfies the following conditions: 0.7<f23/f45<1.3; where f45 is the combined focal length of the fourth lens and the fifth lens. An optical imaging lens group, from the object side to the image side, includes: a first lens with negative refractive power and a concave image side surface; a second lens with positive refractive power and a convex object side surface; The third meniscus lens with positive refractive power has a concave object side surface and a convex image side surface. The combined focal length of the first lens to the third lens is positive; an aperture; a fourth lens with positive refractive power, The object side and the image side are both convex; and a fifth lens with negative refractive power, the object side is concave, the image side is convex, wherein the fourth lens and the fifth lens are cemented lenses; wherein, the The total number of lenses in the optical imaging lens group is five; the refractive index of the second lens is Nd2, the refractive index of the fourth lens is Nd4, the refractive index of the fifth lens is Nd5; the dispersion coefficient of the fourth lens is Vd4 , The dispersion coefficient of the fifth lens is Vd5; the radii of curvature of the object side and the image side of the first lens are R1 and R2, respectively; the combined focal length of the first lens, the second lens and the third lens is f123, The effective focal length of this optical camera lens group is EFL; this optical camera lens group meets the following conditions: Nd2

1.68, Nd4

1.68, Nd5

1.68; Vd4+Vd5<100;-0.01<R2/R1<0.03; and 4<f123/EFL<20. For example, the optical imaging lens group of item 3 in the scope of patent application, wherein the optical imaging lens group satisfies the following conditions: 0.04<(AT23+AT34)/TT25<0.16; where AT23 is the image side of the second lens to the third The distance from the object side of the lens on the optical axis, AT34 is the distance from the image side of the third lens to the object side of the fourth lens on the optical axis, and TT25 is the distance from the object side of the second lens to the fifth lens on the optical axis The distance above. For example, the optical imaging lens group of item 3 of the scope of patent application, wherein the optical imaging lens group satisfies the following conditions: 1.75<f23/EFL<3.3; where f23 is the combined focal length of the second lens and the three lenses. For example, the optical imaging lens group of item 1 or item 3 of the scope of patent application, wherein the optical imaging lens group satisfies the following conditions: -1<R8/EFL<-0.6; wherein, R8 is the image side of the fourth lens The radius of curvature. For example, the optical imaging lens group of item 1 or item 3 of the scope of patent application, wherein the optical imaging lens group satisfies the following conditions: 0.4<AT23/(|Sag4|+|Sag5|)<3.5; where Sag4 is the first The horizontal distance from the intersection of the image side surface and the optical axis of the two lenses to the position of the maximum effective radius of the image side surface. Sag5 is the horizontal distance from the intersection of the object side surface and the optical axis of the third lens to the position of the maximum effective radius of the object side surface. For example, the optical imaging lens group of item 1 or item 3 of the scope of patent application, wherein the third lens meets the following conditions: 5<f3/EFL<12; and 0.6<CT3/EFL<1.2; Among them, f3 is the focal length of the third lens, and CT3 is the thickness of the third lens. For example, the optical imaging lens set of item 8 of the scope of patent application, wherein the third lens satisfies the following condition: Nd3<1.6; where Nd3 is the refractive index of the third lens. For example, the optical imaging lens group of item 1 or item 3 of the scope of patent application, wherein the optical imaging lens group satisfies the following conditions: -1.6<f1/EFL<-1; where f1 is the focal length of the first lens. For example, the optical imaging lens set of item 1 or item 3 of the scope of patent application, wherein the image side surface of the second lens is convex. For example, the optical imaging lens group of item 1 or item 3 of the scope of patent application, wherein the second lens satisfies the following conditions: 0.15<(C3+C4)/(C3-C4)<1.2; where C3 is the two lenses The curvature of the object side, C4 is the curvature of the image side of the second lens. For example, the optical imaging lens set of item 1 or item 3 of the scope of patent application, wherein the third lens satisfies the following conditions: -105<(C5+C6)/(C5-C6)<-5; where C5 is the The curvature of the object side of the three lens, C6 is the curvature of the image side of the third lens. For example, the optical imaging lens set of item 13 in the scope of patent application, wherein the third lens further satisfies the following condition: -12<(C5+C6)/(C5-C6)<-5. For example, the optical imaging lens group of item 8 of the scope of patent application, wherein the optical imaging lens group further satisfies the following conditions: 5<f3/EFL<8. For example, the optical imaging lens group of item 1 or item 3 of the scope of patent application, wherein the optical imaging lens group satisfies the following conditions: 0.4<(AT12+AT23)/EFL<1.7; wherein, AT12 is the image side of the first lens The distance to the object side of the second lens on the optical axis, AT23 is the distance from the image side of the second lens to the object side of the third lens on the optical axis. An imaging device includes an optical imaging lens group such as the first or third item of the scope of patent application, and an image sensing element. An electronic device including the imaging device as claimed in item 17 of the scope of patent application.

Images