CN111897101A - Optical imaging lens group - Google Patents

Abstract

The present application discloses an optical imaging lens group, which includes sequentially from the object side to the image side along an optical axis: a first lens with negative refractive power; a second lens with refractive power; and a negative refractive power The fourth lens with optical power; the fifth lens with negative power, whose object side is concave; and the sixth lens with power, whose object side is convex. The maximum field of view FOV of the optical imaging lens group satisfies: 92°<FOV<116°. The half ImgH of the diagonal length of the effective pixel area on the imaging surface of the optical imaging lens group, the total effective focal length f of the optical imaging lens group, and the entrance pupil diameter EPD of the optical imaging lens group satisfy: ImgH×EPD/f<1mm.

Description

Optical imaging lens group

technical field

The present application relates to the field of optical elements, in particular, to an optical imaging lens group.

Background technique

In recent years, with the rapid development of electronic products, portable and wearable electronic products such as smart phones and smart watches have rapidly become popular. At present, electronic products such as smartphones and smart watches have become necessities in users' daily lives. At the same time, in order to improve the competitiveness of their products, many electronic product suppliers have invested a lot of time and energy in product innovation. Among them, improving the imaging quality of portable and wearable electronic products has become a priority for many suppliers. core competitiveness.

SUMMARY OF THE INVENTION

The present application provides such an optical imaging lens group, the optical imaging lens group sequentially includes from the object side to the image side along the optical axis: a first lens with negative refractive power; a second lens with refractive power; The third lens with negative power; the fourth lens with power; the fifth lens with negative power, whose object side is concave; and the sixth lens with power, whose object side is convex . The maximum field of view FOV of the optical imaging lens group can satisfy: 92°<FOV<116°; and half of the diagonal length of the effective pixel area on the imaging surface of the optical imaging lens group ImgH, the total effective focal length of the optical imaging lens group f and the entrance pupil diameter EPD of the optical imaging lens group can satisfy: ImgH×EPD/f<1mm.

In one embodiment, there is at least one aspherical mirror surface from the object side of the first lens to the image side of the sixth lens.

In one embodiment, the effective focal length f5 of the fifth lens and the total effective focal length f of the optical imaging lens group may satisfy: -1.5<f/f5<0.

In one embodiment, the effective focal length f1 of the first lens and the effective focal length f3 of the third lens may satisfy: 0<f3/(f1+f3)<1.0.

In one embodiment, the total effective focal length f of the optical imaging lens group and the effective focal length f2 of the second lens may satisfy: 0.3<f/f2<1.3.

In one embodiment, the maximum effective radius DT12 of the image side surface of the first lens and the curvature radius R2 of the image side surface of the first lens may satisfy: 0<DT12/R2<1.0.

In one embodiment, the distance SAG12 from the intersection of the image side surface and the optical axis of the first lens to the vertex of the effective radius of the image side surface of the first lens on the optical axis and the intersection of the object side surface and the optical axis of the fifth lens to the fifth lens The distance SAG51 of the effective radius vertex of the object side surface on the optical axis may satisfy: 0.3<SAG51/(SAG51-SAG12)<0.8.

In one embodiment, the maximum effective radius DT42 of the image side of the fourth lens and the maximum effective radius DT61 of the object side of the sixth lens may satisfy: 0.5<DT42/DT61<1.0.

In one embodiment, the center thickness CT4 of the fourth lens on the optical axis and the edge thickness ET4 of the fourth lens may satisfy: 0.2<ET4/CT4<0.7.

In one embodiment, the edge thickness ET5 of the fifth lens and the maximum effective radius DT51 of the object side surface of the fifth lens may satisfy: 0.2<ET5/DT51<1.0.

In one embodiment, the curvature radius R8 of the image side surface of the fourth lens and the effective focal length f4 of the fourth lens may satisfy: -1.5<R8/f4<0.

In one embodiment, the curvature radius R2 of the image side surface of the first lens and the curvature radius R3 of the object side surface of the second lens may satisfy: 0.5<R2/R3<1.5.

In one embodiment, the curvature radius R8 of the image side surface of the fourth lens and the curvature radius R9 of the object side surface of the fifth lens may satisfy: 0<R8/R9<1.0.

In one embodiment, the curvature radius R11 of the object side surface of the sixth lens and the curvature radius R12 of the image side surface of the sixth lens may satisfy: 0.3<R12/R11<1.3.

In one embodiment, the central thickness CT1 of the first lens on the optical axis, the central thickness CT2 of the second lens on the optical axis, the central thickness CT3 of the third lens on the optical axis, and the thickness of the fifth lens on the optical axis The central thickness CT5 can satisfy: 0.2<CT2/(CT1+CT3+CT5)<1.0.

In one embodiment, the optical imaging lens group further includes a diaphragm, the distance SD from the diaphragm to the image side of the sixth lens on the optical axis is the same as the distance SD from the object side of the first lens to the image side of the sixth lens on the optical axis The distance TD can satisfy: 0.5<SD/TD<1.0.

Another aspect of the present application provides such an optical imaging lens group, the optical imaging lens group sequentially includes from the object side to the image side along the optical axis: a first lens with negative refractive power; a first lens with refractive power Two lenses; a third lens with negative power; a fourth lens with power; a fifth lens with negative power, whose object side is concave; and a sixth lens with power, whose object The sides are convex. The maximum field of view FOV of the optical imaging lens group can satisfy: 92°<FOV<116°. The distance from the intersection of the image side and the optical axis of the first lens to the effective radius vertex of the image side of the first lens on the optical axis SAG12 and the intersection of the object side and the optical axis of the fifth lens to the effective radius vertex of the fifth lens The distance SAG51 on the optical axis may satisfy: 0.3<SAG51/(SAG51-SAG12)<0.8.

In one embodiment, the effective focal length f5 of the fifth lens and the total effective focal length f of the optical imaging lens group may satisfy: -1.5<f/f5<0.

In one embodiment, the effective focal length f1 of the first lens and the effective focal length f3 of the third lens may satisfy: 0<f3/(f1+f3)<1.0.

In one embodiment, the total effective focal length f of the optical imaging lens group and the effective focal length f2 of the second lens may satisfy: 0.3<f/f2<1.3.

In one embodiment, the maximum effective radius DT12 of the image side surface of the first lens and the curvature radius R2 of the image side surface of the first lens may satisfy: 0<DT12/R2<1.0.

In one embodiment, the maximum effective radius DT42 of the image side of the fourth lens and the maximum effective radius DT61 of the object side of the sixth lens may satisfy: 0.5<DT42/DT61<1.0.

In one embodiment, the center thickness CT4 of the fourth lens on the optical axis and the edge thickness ET4 of the fourth lens may satisfy: 0.2<ET4/CT4<0.7.

In one embodiment, the edge thickness ET5 of the fifth lens and the maximum effective radius DT51 of the object side surface of the fifth lens may satisfy: 0.2<ET5/DT51<1.0.

In one embodiment, the curvature radius R8 of the image side surface of the fourth lens and the effective focal length f4 of the fourth lens may satisfy: -1.5<R8/f4<0.

In one embodiment, the curvature radius R2 of the image side surface of the first lens and the curvature radius R3 of the object side surface of the second lens may satisfy: 0.5<R2/R3<1.5.

In one embodiment, the curvature radius R8 of the image side surface of the fourth lens and the curvature radius R9 of the object side surface of the fifth lens may satisfy: 0<R8/R9<1.0.

In one embodiment, the curvature radius R11 of the object side surface of the sixth lens and the curvature radius R12 of the image side surface of the sixth lens may satisfy: 0.3<R12/R11<1.3.

In one embodiment, the central thickness CT1 of the first lens on the optical axis, the central thickness CT2 of the second lens on the optical axis, the central thickness CT3 of the third lens on the optical axis, and the thickness of the fifth lens on the optical axis The central thickness CT5 can satisfy: 0.2<CT2/(CT1+CT3+CT5)<1.0.

In one embodiment, the optical imaging lens group further includes a diaphragm, the distance SD from the diaphragm to the image side of the sixth lens on the optical axis is the same as the distance SD from the object side of the first lens to the image side of the sixth lens on the optical axis The distance TD can satisfy: 0.5<SD/TD<1.0.

In one embodiment, the half ImgH of the diagonal length of the effective pixel area on the imaging surface of the optical imaging lens group, the total effective focal length f of the optical imaging lens group, and the entrance pupil diameter EPD of the optical imaging lens group may satisfy: ImgH× EPD/f<1mm.

The present application adopts multiple lenses (for example, six lenses), and the above-mentioned optical imaging lens group has At least one beneficial effect is large field of view, miniaturization and high imaging quality.

Description of drawings

Other features, objects and advantages of the present application will become more apparent by reading the detailed description of non-limiting embodiments made with reference to the following drawings:

1 shows a schematic structural diagram of an optical imaging lens group according to Embodiment 1 of the present application;

2A to 2D respectively show the on-axis chromatic aberration curve, astigmatism curve, distortion curve and magnification chromatic aberration curve of the optical imaging lens group of Embodiment 1;

FIG. 3 shows a schematic structural diagram of an optical imaging lens group according to Embodiment 2 of the present application;

4A to 4D respectively show the on-axis chromatic aberration curve, astigmatism curve, distortion curve and magnification chromatic aberration curve of the optical imaging lens group of Embodiment 2;

FIG. 5 shows a schematic structural diagram of an optical imaging lens group according to Embodiment 3 of the present application;

6A to 6D respectively show the on-axis chromatic aberration curve, astigmatism curve, distortion curve and magnification chromatic aberration curve of the optical imaging lens group of Embodiment 3;

FIG. 7 shows a schematic structural diagram of an optical imaging lens group according to Embodiment 4 of the present application;

8A to 8D respectively show the on-axis chromatic aberration curve, astigmatism curve, distortion curve and magnification chromatic aberration curve of the optical imaging lens group of Embodiment 4;

FIG. 9 shows a schematic structural diagram of an optical imaging lens group according to Embodiment 5 of the present application;

10A to 10D respectively show the on-axis chromatic aberration curve, astigmatism curve, distortion curve and magnification chromatic aberration curve of the optical imaging lens group of Embodiment 5;

FIG. 11 shows a schematic structural diagram of an optical imaging lens group according to Embodiment 6 of the present application; and

12A to 12D respectively show the on-axis chromatic aberration curve, astigmatism curve, distortion curve, and magnification chromatic aberration curve of the optical imaging lens group of Example 6. FIG.

Detailed ways

For a better understanding of the present application, various aspects of the present application will be described in more detail with reference to the accompanying drawings. It should be understood that these detailed descriptions are merely illustrative of exemplary embodiments of the present application and are not intended to limit the scope of the present application in any way. Throughout the specification, the same reference numerals refer to the same elements. The expression "and/or" includes any and all combinations of one or more of the associated listed items.

It should be noted that in this specification, the expressions first, second, third etc. are only used to distinguish one feature from another feature and do not imply any limitation on the feature. Accordingly, the first lens discussed below may also be referred to as a second lens or a third lens without departing from the teachings of the present application.

In the drawings, the thickness, size and shape of the lenses have been slightly exaggerated for convenience of explanation. In particular, the spherical or aspherical shapes shown in the figures are shown by way of example. That is, the shape of the spherical or aspherical surface is not limited to the shape of the spherical or aspherical surface shown in the drawings. The drawings are examples only and are not drawn strictly to scale.

Herein, the paraxial region refers to the region near the optical axis. If the lens surface is convex and the convex position is not defined, it means that the lens surface is convex at least in the paraxial region; if the lens surface is concave and the concave position is not defined, it means that the lens surface is at least in the paraxial region. Concave. The surface of each lens closest to the object is called the object side of the lens, and the surface of each lens closest to the imaging surface is called the image side of the lens.

It will also be understood that the terms "comprising", "comprising", "having", "comprising" and/or "comprising" when used in this specification mean that the stated features, elements and/or components are present , but does not preclude the presence or addition of one or more other features, elements, components and/or combinations thereof. Furthermore, when an expression such as "at least one of" appears after a list of listed features, it modifies the entire listed feature and not the individual elements of the list. Furthermore, when describing embodiments of the present application, the use of "may" means "one or more embodiments of the present application." Also, the term "exemplary" is intended to refer to an example or illustration.

Unless otherwise defined, all terms (including technical and scientific terms) used herein have the same meaning as commonly understood by one of ordinary skill in the art to which this application belongs. It should also be understood that terms (such as those defined in commonly used dictionaries) should be construed to have meanings consistent with their meanings in the context of the related art, and will not be construed in idealized or overly formalized senses, unless expressly so limited herein.

It should be noted that the embodiments in the present application and the features of the embodiments may be combined with each other in the case of no conflict. The present application will be described in detail below with reference to the accompanying drawings and in conjunction with the embodiments.

The features, principles, and other aspects of the present application are described in detail below.

The optical imaging lens group according to the exemplary embodiment of the present application may include six lenses having optical power, which are a first lens, a second lens, a third lens, a fourth lens, a fifth lens and a sixth lens, respectively. The six lenses are arranged in sequence from the object side to the image side along the optical axis. Any two adjacent lenses among the first to sixth lenses may have a separation distance.

In an exemplary embodiment, the first lens may have negative power; the second lens may have positive power or negative power; the third lens may have negative power; the fourth lens may have positive power or negative power; the fifth lens may have negative power, and its object side may be concave; and the sixth lens may have positive or negative power, and its object side may be convex. By reasonably setting the optical power and surface characteristics of each lens, it is beneficial to balance and correct various aberrations of the optical imaging lens group, and is beneficial to improve the imaging quality of the optical imaging lens group.

In an exemplary embodiment, the optical imaging lens group according to the present application may satisfy: 92°<FOV<116°, where FOV is the maximum field angle of the optical imaging lens group. More specifically, the FOV may further satisfy: 104°<FOV<113°. Satisfying 92°<FOV<116° is favorable for realizing wide-angle characteristics and increasing the imaging range on the imaging plane.

In an exemplary embodiment, the optical imaging lens group according to the present application may satisfy: ImgH×EPD/f<1mm, where ImgH is half the diagonal length of the effective pixel area on the imaging plane of the optical imaging lens group, f is the total effective focal length of the optical imaging lens group, and EPD is the entrance pupil diameter of the optical imaging lens group. More specifically, ImgH, EPD and f may further satisfy: ImgH×EPD/f<0.9mm. Satisfying ImgH×EPD/f<1mm is beneficial for miniaturization.

In an exemplary embodiment, the optical imaging lens group according to the present application may satisfy: -1.5<f/f5<0, where f5 is the effective focal length of the fifth lens, and f is the total effective focal length of the optical imaging lens group. More specifically, f and f5 may further satisfy: -1.0<f/f5<-0.3. Satisfying -1.5<f/f5<0 is beneficial to reduce the vertical axis chromatic aberration of the lens group.

In an exemplary embodiment, the optical imaging lens group according to the present application may satisfy: 0<f3/(f1+f3)<1.0, where f1 is the effective focal length of the first lens, and f3 is the effective focal length of the third lens. More specifically, f1 and f3 may further satisfy: 0.5<f3/(f1+f3)<0.9. Satisfying 0<f3/(f1+f3)<1.0 is beneficial to reduce the axial chromatic aberration of the lens group and improve the imaging performance of the optical imaging lens group.

In an exemplary embodiment, the optical imaging lens group according to the present application may satisfy: 0.3<f/f2<1.3, where f is the total effective focal length of the optical imaging lens group, and f2 is the effective focal length of the second lens. More specifically, f and f2 may further satisfy: 0.4<f/f2<1.2. Satisfying 0.3<f/f2<1.3 is beneficial to reduce the vertical axis chromatic aberration of the lens group and at the same time contribute to the miniaturized design of the lens group.

In an exemplary embodiment, the optical imaging lens group according to the present application may satisfy: 0<DT12/R2<1.0, wherein DT12 is the maximum effective radius of the image side of the first lens, and R2 is the image side of the first lens. Radius of curvature. More specifically, DT12 and R2 may further satisfy: 0.2<DT12/R2<0.7. Satisfying 0<DT12/R2<1.0 is beneficial to the production and processing of the lens group, and at the same time, it is also beneficial to reduce the off-axis field curvature of the lens group.

In an exemplary embodiment, the optical imaging lens group according to the present application may satisfy: 0.3<SAG51/(SAG51-SAG12)<0.8, where SAG12 is the intersection of the image side surface and the optical axis of the first lens to the image of the first lens The distance of the effective radius vertex of the side surface on the optical axis, SAG51 is the distance on the optical axis from the intersection of the object side surface of the fifth lens and the optical axis to the effective radius vertex of the object side surface of the fifth lens. More specifically, SAG51 and SAG12 can further satisfy: 0.3<SAG51/(SAG51-SAG12)<0.7. Satisfying 0.3<SAG51/(SAG51-SAG12)<0.8 is beneficial to improve the manufacturability and imaging quality of the lens group. If SAG51/(SAG51-SAG12)>0.8, it is easy to lead to poor manufacturability; if SAG51/(SAG51-SAG12)<0.3, it is not conducive to correct the field curvature of the off-axis field of view.

In an exemplary embodiment, the optical imaging lens group according to the present application may satisfy: 0.5<DT42/DT61<1.0, wherein DT42 is the maximum effective radius of the image side of the fourth lens, and DT61 is the object side of the sixth lens Maximum effective radius. More specifically, DT42 and DT61 can further satisfy: 0.6<DT42/DT61<0.9. Satisfying 0.5<DT42/DT61<1.0 not only helps to limit the size of the lens group, but also helps to meet the requirements of the processing technology of the lens group.

In an exemplary embodiment, the optical imaging lens group according to the present application may satisfy: 0.2<ET4/CT4<0.7, wherein CT4 is the center thickness of the fourth lens on the optical axis, and ET4 is the edge thickness of the fourth lens. More specifically, ET4 and CT4 may further satisfy: 0.2<ET4/CT4<0.5. Satisfying 0.2<ET4/CT4<0.7 can not only ensure the processing requirements of the lens group, but also reduce the monochromatic aberration of the lens group.

In an exemplary embodiment, the optical imaging lens group according to the present application may satisfy: 0.2<ET5/DT51<1.0, where ET5 is the edge thickness of the fifth lens, and DT51 is the maximum effective radius of the object side of the fifth lens. More specifically, ET5 and DT51 can further satisfy: 0.4<ET5/DT51<0.8. Satisfying 0.2<ET5/DT51<1.0 can not only ensure the processing technology requirements of the lens group, but also reduce the influence of ghost images.

In an exemplary embodiment, the optical imaging lens group according to the present application may satisfy: -1.5<R8/f4<0, where R8 is the curvature radius of the image side surface of the fourth lens, and f4 is the effective focal length of the fourth lens. More specifically, R8 and f4 may further satisfy: -1.0<R8/f4<-0.7. Satisfying -1.5<R8/f4<0 is beneficial to reduce the axial chromatic aberration.

In an exemplary embodiment, the optical imaging lens group according to the present application may satisfy: 0.5<R2/R3<1.5, where R2 is the radius of curvature of the image side of the first lens, and R3 is the curvature of the object side of the second lens radius. More specifically, R2 and R3 may further satisfy: 0.5<R2/R3<1.2. Satisfying 0.5<R2/R3<1.5 is beneficial to reduce spherical aberration.

In an exemplary embodiment, the optical imaging lens group according to the present application may satisfy: 0<R8/R9<1.0, wherein R8 is the curvature radius of the image side of the fourth lens, and R9 is the curvature of the object side of the fifth lens radius. More specifically, R8 and R9 may further satisfy: 0.1<R8/R9<0.7. Satisfying 0<R8/R9<1.0 is beneficial to correct field curvature and reduce the influence of ghost images.

In an exemplary embodiment, the optical imaging lens group according to the present application may satisfy: 0.3<R12/R11<1.3, wherein R11 is the radius of curvature of the object side of the sixth lens, and R12 is the curvature of the image side of the sixth lens radius. More specifically, R12 and R11 may further satisfy: 0.5<R12/R11<1.0. Satisfying 0.3<R12/R11<1.3, both miniaturization and correction of field curvature can be achieved.

In an exemplary embodiment, the optical imaging lens group according to the present application may satisfy: 0.2<CT2/(CT1+CT3+CT5)<1.0, wherein CT1 is the central thickness of the first lens on the optical axis, and CT2 is the first The central thickness of the second lens on the optical axis, CT3 is the central thickness of the third lens on the optical axis, and CT5 is the central thickness of the fifth lens on the optical axis. More specifically, CT2, CT1, CT3 and CT5 may further satisfy: 0.3<CT2/(CT1+CT3+CT5)<0.8. Satisfying 0.2<CT2/(CT1+CT3+CT5)<1.0 is conducive to ensuring the processability of the lens group and reducing the vertical axis chromatic aberration and axial chromatic aberration of the lens group.

In an exemplary embodiment, the optical imaging lens group further includes a diaphragm, and the optical imaging lens group according to the present application may satisfy: 0.5<SD/TD<1.0, where SD is the image side of the diaphragm to the sixth lens in the light The distance on the axis, TD is the distance on the optical axis from the object side of the first lens to the image side of the sixth lens. More specifically, SD and TD may further satisfy: 0.7<SD/TD<0.9. Satisfying 0.5<SD/TD<1.0 not only helps to reduce astigmatism, but also helps to make the lens group have a smaller total optical length.

In an exemplary embodiment, the optical imaging lens group according to the present application further includes a diaphragm disposed between the first lens and the second lens. Optionally, the above-mentioned optical imaging lens group may further include a filter for correcting color deviation and/or a protective glass for protecting the photosensitive element located on the imaging surface.

The optical imaging lens set according to the above-mentioned embodiments of the present application may employ multiple lenses, such as the above-mentioned six lenses. By reasonably allocating the optical power, surface shape, central thickness of each lens, and on-axis distance between each lens, etc., the volume of the optical imaging lens group can be effectively reduced and the machinability of the optical imaging lens group can be improved. The optical imaging lens group is more conducive to production and processing and is suitable for portable electronic products. The optical imaging lens group configured as above can have characteristics such as ultra-wide angle, miniaturization, good imaging quality, and the like.

In the embodiments of the present application, at least one of the mirror surfaces of each lens is an aspheric mirror surface, that is, at least one mirror surface from the object side of the first lens to the image side of the sixth lens is an aspheric mirror surface. The characteristic of aspheric lenses is that the curvature changes continuously from the center of the lens to the periphery of the lens. Unlike spherical lenses, which have a constant curvature from the center of the lens to the periphery of the lens, aspheric lenses have better curvature radius characteristics, and have the advantages of improving distortion and astigmatism. After the aspherical lens is used, the aberration that occurs during imaging can be eliminated as much as possible, thereby improving the imaging quality. Optionally, at least one of the object side surface and the image side surface of each of the first lens, the second lens, the third lens, the fourth lens, the fifth lens and the sixth lens is an aspherical mirror surface. Optionally, the object side surface and the image side surface of each of the first lens, the second lens, the third lens, the fourth lens, the fifth lens and the sixth lens are aspherical mirror surfaces.

However, those skilled in the art should understand that the number of lenses constituting the optical imaging lens group can be changed to obtain the various results and advantages described in this specification without departing from the technical solutions claimed in the present application. For example, although six lenses are described as an example in the embodiment, the optical imaging lens group is not limited to including six lenses. The optical imaging lens set may also include other numbers of lenses if desired.

Specific examples of the optical imaging lens group applicable to the above-described embodiments are further described below with reference to the accompanying drawings.

Example 1

The following describes the optical imaging lens group according to Embodiment 1 of the present application with reference to FIGS. 1 to 2D . FIG. 1 shows a schematic structural diagram of an optical imaging lens group according to Embodiment 1 of the present application.

As shown in FIG. 1 , the optical imaging lens group sequentially includes from the object side to the image side: a first lens E1, a diaphragm STO, a second lens E2, a third lens E3, a fourth lens E4, a fifth lens E5, a Six lenses E6, filter E7 and imaging surface S15.

The first lens E1 has negative refractive power, the object side S1 is concave, and the image side S2 is concave. The second lens E2 has positive refractive power, the object side S3 is convex, and the image side S4 is concave. The third lens E3 has negative refractive power, the object side S5 is convex, and the image side S6 is concave. The fourth lens E4 has positive refractive power, the object side S7 is convex, and the image side S8 is convex. The fifth lens E5 has negative refractive power, the object side S9 is concave, and the image side S10 is concave. The sixth lens E6 has negative refractive power, the object side S11 is convex, and the image side S12 is concave. The filter E7 has an object side S13 and an image side S14. The light from the object sequentially passes through the surfaces S1 to S14 and is finally imaged on the imaging surface S15.

Table 1 shows the basic parameter table of the optical imaging lens group of Example 1, wherein the units of curvature radius, thickness/distance and focal length are all millimeters (mm).

Table 1

In this example, the total effective focal length f of the optical imaging lens group is 1.80 mm, and the total length TTL of the optical imaging lens group (that is, from the object side S1 of the first lens E1 to the imaging surface S15 of the optical imaging lens group is on the optical axis The distance from above) is 4.00mm, half of the diagonal length ImgH of the effective pixel area on the imaging surface S15 of the optical imaging lens group is 1.81mm, the total effective focal length f of the optical imaging lens group and the entrance pupil diameter of the optical imaging lens group The ratio f/EPD of EPD is 2.08, and the maximum field of view FOV of the optical imaging lens group is 105.0°.

In Embodiment 1, the object side and the image side of any one of the first lens E1 to the sixth lens E6 are aspherical, and the surface type x of each aspherical lens can be defined by, but not limited to, the following aspherical formula :

Among them, x is the distance vector height of the aspheric surface from the vertex of the aspheric surface when the height is h along the optical axis; c is the paraxial curvature of the aspheric surface, c=1/R (that is, the paraxial curvature c is the above table 1 is the reciprocal of the radius of curvature R); k is the conic coefficient; Ai is the correction coefficient of the i-th order of the aspheric surface. Table 2 below shows the higher order coefficients A ₄ , A ₆ , A ₈ , A ₁₀ , A ₁₂ , A ₁₄ , and A ₁₆ that can be used for each of the aspheric mirror surfaces S1 to S12 in Example 1.

face number A4 A6 A8 A10 A12 A14 A16 S1 7.7747E-01 -1.7731E+00 4.5300E+00 -1.0388E+01 1.6144E+01 -1.4271E+01 5.3862E+00 S2 1.1910E+00 -2.6945E+00 1.7573E+01 -1.0960E+02 4.6058E+02 -1.0665E+03 1.0278E+03 S3 1.4690E-01 6.0499E-01 -1.5051E+01 1.2801E+02 -6.1215E+02 1.5172E+03 -1.5103E+03 S4 -3.9058E-01 -6.3239E-01 4.7100E+00 -2.4821E+01 8.1457E+01 -1.4731E+02 1.2139E+02 S5 -5.7857E-01 -1.6365E+00 1.0815E+01 -6.1321E+01 2.1341E+02 -3.7745E+02 2.7591E+02 S6 -3.6154E-01 4.5116E-01 -1.4900E+00 3.7586E+00 -6.0426E+00 8.3389E+00 -4.5535E+00 S7 -3.3081E-01 1.3358E+00 -3.6588E+00 7.1695E+00 -1.1305E+01 1.2047E+01 -5.6013E+00 S8 -3.2198E-01 1.1772E+00 -2.4669E+00 3.7624E+00 -3.2469E+00 9.5898E-01 2.0144E-01 S9 3.1540E-01 -1.1292E+00 2.7505E+00 -5.5397E+00 7.6779E+00 -6.5365E+00 2.3984E+00 S10 5.0326E-01 -1.5081E+00 2.3731E+00 -2.3993E+00 1.4891E+00 -5.0732E-01 7.1965E-02 S11 -1.0291E+00 1.0676E+00 -1.0891E+00 8.7966E-01 -4.2390E-01 1.0698E-01 -1.1037E-02 S12 -5.1896E-01 5.6669E-01 -5.1541E-01 3.3386E-01 -1.4262E-01 3.5466E-02 -3.7931E-03

Table 2

FIG. 2A shows the on-axis chromatic aberration curve of the optical imaging lens group of Embodiment 1, which represents the deviation of the converging point of light of different wavelengths after passing through the lens. 2B shows astigmatism curves of the optical imaging lens group of Example 1, which represent the meridional curvature of the image plane and the sagittal image plane curvature. FIG. 2C shows a distortion curve of the optical imaging lens group of Example 1, which represents the magnitude of distortion corresponding to different field angles. FIG. 2D shows the magnification chromatic aberration curve of the optical imaging lens group of Example 1, which represents the deviation of different image heights on the imaging plane after light passes through the lens. According to FIG. 2A to FIG. 2D , it can be seen that the optical imaging lens group given in Embodiment 1 can achieve good imaging quality.

Example 2

The following describes the optical imaging lens group according to Embodiment 2 of the present application with reference to FIGS. 3 to 4D . In this embodiment and the following embodiments, descriptions similar to those in Embodiment 1 will be omitted for the sake of brevity. FIG. 3 shows a schematic structural diagram of an optical imaging lens group according to Embodiment 2 of the present application.

As shown in FIG. 3 , the optical imaging lens group sequentially includes from the object side to the image side: a first lens E1, a diaphragm STO, a second lens E2, a third lens E3, a fourth lens E4, a fifth lens E5, a Six lenses E6, filter E7 and imaging surface S15.

The first lens E1 has negative refractive power, the object side S1 is convex, and the image side S2 is concave. The second lens E2 has positive refractive power, the object side S3 is convex, and the image side S4 is convex. The third lens E3 has negative refractive power, the object side S5 is concave, and the image side S6 is convex. The fourth lens E4 has positive refractive power, the object side S7 is concave, and the image side S8 is convex. The fifth lens E5 has negative refractive power, the object side S9 is concave, and the image side S10 is concave. The sixth lens E6 has negative refractive power, the object side S11 is convex, and the image side S12 is concave. The filter E7 has an object side S13 and an image side S14. The light from the object sequentially passes through the surfaces S1 to S14 and is finally imaged on the imaging surface S15.

In this example, the total effective focal length f of the optical imaging lens group is 1.75mm, the total length TTL of the optical imaging lens group is 3.98mm, and the half of the diagonal length of the effective pixel area on the imaging plane S15 of the optical imaging lens group is ImgH is 1.85mm, the ratio f/EPD of the total effective focal length f of the optical imaging lens group to the entrance pupil diameter EPD of the optical imaging lens group is 2.20, and the maximum field of view FOV of the optical imaging lens group is 112.0°.

Table 3 shows the basic parameter table of the optical imaging lens group of Example 2, wherein the units of curvature radius, thickness/distance and focal length are all millimeters (mm). Table 4 shows the high-order term coefficients that can be used for each aspherical mirror surface in Example 2, where each aspherical surface type can be defined by the formula (1) given in Example 1 above.

table 3

Table 4

FIG. 4A shows the on-axis chromatic aberration curve of the optical imaging lens group of Embodiment 2, which represents the deviation of the confocal point of light of different wavelengths after passing through the lens. 4B shows astigmatism curves of the optical imaging lens group of Example 2, which represent the meridional curvature of the image plane and the sagittal image plane curvature. FIG. 4C shows the distortion curve of the optical imaging lens group of Example 2, which represents the magnitude of the distortion corresponding to different field angles. FIG. 4D shows the magnification chromatic aberration curve of the optical imaging lens group of Example 2, which represents the deviation of different image heights on the imaging plane after light passes through the lens. According to FIGS. 4A to 4D , it can be seen that the optical imaging lens group given in Embodiment 2 can achieve good imaging quality.

Example 3

The optical imaging lens group according to Embodiment 3 of the present application is described below with reference to FIGS. 5 to 6D . FIG. 5 shows a schematic structural diagram of an optical imaging lens group according to Embodiment 3 of the present application.

As shown in FIG. 5 , the optical imaging lens group sequentially includes from the object side to the image side: a first lens E1, a diaphragm STO, a second lens E2, a third lens E3, a fourth lens E4, a fifth lens E5, a Six lenses E6, filter E7 and imaging surface S15.

The first lens E1 has negative refractive power, the object side S1 is concave, and the image side S2 is concave. The second lens E2 has positive refractive power, the object side S3 is convex, and the image side S4 is convex. The third lens E3 has negative refractive power, the object side S5 is convex, and the image side S6 is concave. The fourth lens E4 has positive refractive power, the object side S7 is convex, and the image side S8 is convex. The fifth lens E5 has negative refractive power, the object side S9 is concave, and the image side S10 is convex. The sixth lens E6 has positive refractive power, the object side S11 is convex, and the image side S12 is concave. The filter E7 has an object side S13 and an image side S14. The light from the object sequentially passes through the surfaces S1 to S14 and is finally imaged on the imaging surface S15.

In this example, the total effective focal length f of the optical imaging lens group is 1.86mm, the total length TTL of the optical imaging lens group is 4.10mm, and half the diagonal length of the effective pixel area on the imaging plane S15 of the optical imaging lens group is ImgH is 1.85mm, the ratio f/EPD of the total effective focal length f of the optical imaging lens group to the entrance pupil diameter EPD of the optical imaging lens group is 2.25, and the maximum field of view FOV of the optical imaging lens group is 110.0°.

Table 5 shows the basic parameter table of the optical imaging lens group of Example 3, wherein the units of curvature radius, thickness/distance and focal length are all millimeters (mm). Table 6 shows the higher-order term coefficients that can be used for each aspherical mirror surface in Example 3, where each aspherical surface type can be defined by the formula (1) given in Example 1 above.

table 5

face number A4 A6 A8 A10 A12 A14 A16 A18 A20 S1 4.9099E-01 -8.3180E-01 1.1823E+00 -1.3561E+00 1.0581E+00 -4.6290E-01 8.9152E-02 4.9099E-01 -8.3180E-01 S2 7.5746E-01 -9.0734E-01 3.5042E+00 -1.7770E+01 8.3955E+01 -2.1433E+02 2.3441E+02 7.5746E-01 -9.0734E-01 S3 6.6725E-02 1.0576E+00 -2.3965E+01 2.0038E+02 -9.5947E+02 2.4125E+03 -2.5326E+03 6.6725E-02 1.0576E+00 S4 -2.7110E-01 -4.8767E-01 3.0271E+00 -2.3087E+01 8.0401E+01 -1.3052E+02 5.2922E+01 -2.7110E-01 -4.8767E-01 S5 -3.0851E-01 -1.3065E+00 4.5839E+00 -1.2785E+01 2.0242E+01 -2.2561E+00 -1.4670E+01 -3.0851E-01 -1.3065E+00 S6 -1.1288E-01 -5.8434E-01 1.7157E+00 -3.1982E+00 4.4253E+00 -2.7792E+00 5.3644E-01 -1.1288E-01 -5.8434E-01 S7 -1.8121E-01 6.1869E-01 -1.8154E+00 4.2619E+00 -6.3781E+00 5.0014E+00 -1.5489E+00 -1.8121E-01 6.1869E-01 S8 -5.0879E-01 1.4354E+00 -2.6891E+00 3.4159E+00 -1.7774E+00 -4.7854E-01 5.7331E-01 -5.0879E-01 1.4354E+00 S9 1.9835E-01 -7.5079E-01 1.3429E+00 -1.3302E+00 7.7644E-01 -3.9330E-01 1.0841E-01 1.9835E-01 -7.5079E-01 S10 4.4953E-01 -1.1929E+00 1.7222E+00 -1.4798E+00 7.6008E-01 -2.1749E-01 2.6764E-02 4.4953E-01 -1.1929E+00 S11 -8.1408E-01 6.8110E-01 -5.8576E-01 4.3336E-01 -1.9649E-01 4.6686E-02 -4.4925E-03 -8.1408E-01 6.8110E-01 S12 -3.7484E-01 2.6634E-01 -1.4637E-01 5.6940E-02 -1.5960E-02 2.8240E-03 -2.2676E-04 -3.7484E-01 2.6634E-01

Table 6

FIG. 6A shows the on-axis chromatic aberration curve of the optical imaging lens group of Embodiment 3, which represents the deviation of the confocal point of light of different wavelengths after passing through the lens. 6B shows astigmatism curves of the optical imaging lens group of Example 3, which represent the meridional curvature of the image plane and the sagittal image plane curvature. FIG. 6C shows a distortion curve of the optical imaging lens group of Example 3, which represents the magnitude of the distortion corresponding to different field angles. FIG. 6D shows the magnification chromatic aberration curve of the optical imaging lens group of Example 3, which represents the deviation of different image heights on the imaging plane after light passes through the lens. According to FIG. 6A to FIG. 6D , it can be seen that the optical imaging lens group given in Embodiment 3 can achieve good imaging quality.

Example 4

The optical imaging lens group according to Embodiment 4 of the present application is described below with reference to FIGS. 7 to 8D . FIG. 7 shows a schematic structural diagram of an optical imaging lens group according to Embodiment 4 of the present application.

As shown in FIG. 7 , the optical imaging lens group sequentially includes from the object side to the image side: a first lens E1, a diaphragm STO, a second lens E2, a third lens E3, a fourth lens E4, a fifth lens E5, a Six lenses E6, filter E7 and imaging surface S15.

The first lens E1 has negative refractive power, the object side S1 is convex, and the image side S2 is concave. The second lens E2 has positive refractive power, the object side S3 is convex, and the image side S4 is convex. The third lens E3 has negative refractive power, the object side S5 is convex, and the image side S6 is concave. The fourth lens E4 has positive refractive power, the object side S7 is convex, and the image side S8 is convex. The fifth lens E5 has negative refractive power, the object side S9 is concave, and the image side S10 is concave. The sixth lens E6 has negative refractive power, the object side S11 is convex, and the image side S12 is concave. The filter E7 has an object side S13 and an image side S14. The light from the object sequentially passes through the surfaces S1 to S14 and is finally imaged on the imaging surface S15.

In this example, the total effective focal length f of the optical imaging lens group is 1.81mm, the total length TTL of the optical imaging lens group is 4.10mm, and the half of the diagonal length of the effective pixel area on the imaging plane S15 of the optical imaging lens group is ImgH is 1.82mm, the ratio f/EPD of the total effective focal length f of the optical imaging lens group to the entrance pupil diameter EPD of the optical imaging lens group is 2.20, and the maximum field of view FOV of the optical imaging lens group is 106.0°.

Table 7 shows the basic parameter table of the optical imaging lens group of Example 4, wherein the units of curvature radius, thickness/distance and focal length are all millimeters (mm). Table 8 shows the higher-order term coefficients that can be used for each aspherical mirror surface in Example 4, where each aspherical surface type can be defined by the formula (1) given in Example 1 above.

Table 7

Table 8

FIG. 8A shows the on-axis chromatic aberration curve of the optical imaging lens group of Embodiment 4, which represents the deviation of the confocal point of light of different wavelengths after passing through the lens. 8B shows astigmatism curves of the optical imaging lens group of Example 4, which represent the meridional curvature of the field and the sagittal curvature of the field. FIG. 8C shows a distortion curve of the optical imaging lens group of Example 4, which indicates the magnitude of the distortion corresponding to different field angles. FIG. 8D shows the magnification chromatic aberration curve of the optical imaging lens group of Example 4, which represents the deviation of different image heights on the imaging plane after light passes through the lens. According to FIGS. 8A to 8D , it can be seen that the optical imaging lens group provided in Embodiment 4 can achieve good imaging quality.

Example 5

The optical imaging lens group according to Embodiment 5 of the present application is described below with reference to FIGS. 9 to 10D . FIG. 9 shows a schematic structural diagram of an optical imaging lens group according to Embodiment 5 of the present application.

As shown in FIG. 9 , the optical imaging lens group sequentially includes from the object side to the image side: a first lens E1, a diaphragm STO, a second lens E2, a third lens E3, a fourth lens E4, a fifth lens E5, a Six lenses E6, filter E7 and imaging surface S15.

The first lens E1 has negative refractive power, the object side S1 is convex, and the image side S2 is concave. The second lens E2 has positive refractive power, the object side S3 is convex, and the image side S4 is convex. The third lens E3 has negative refractive power, the object side S5 is convex, and the image side S6 is concave. The fourth lens E4 has positive refractive power, the object side S7 is convex, and the image side S8 is convex. The fifth lens E5 has negative refractive power, the object side S9 is concave, and the image side S10 is convex. The sixth lens E6 has negative refractive power, the object side S11 is convex, and the image side S12 is concave. The filter E7 has an object side S13 and an image side S14. The light from the object sequentially passes through the surfaces S1 to S14 and is finally imaged on the imaging surface S15.

In this example, the total effective focal length f of the optical imaging lens group is 1.66mm, the total length TTL of the optical imaging lens group is 4.29mm, and the half of the diagonal length of the effective pixel area on the imaging plane S15 of the optical imaging lens group is ImgH is 1.82mm, the ratio f/EPD of the total effective focal length f of the optical imaging lens group to the entrance pupil diameter EPD of the optical imaging lens group is 2.20, and the maximum field of view FOV of the optical imaging lens group is 110.0°.

Table 9 shows the basic parameter table of the optical imaging lens group of Example 5, wherein the units of curvature radius, thickness/distance, and focal length are all millimeters (mm). Table 10 shows the higher-order term coefficients that can be used for each aspherical mirror surface in Example 5, where each aspherical surface type can be defined by the formula (1) given in Example 1 above.

Table 9

face number A4 A6 A8 A10 A12 A14 A16 S1 4.7016E-01 -4.6297E-01 5.9546E-01 -4.0313E-01 1.9662E-02 1.7843E-01 -1.0425E-01 S2 9.2868E-01 -6.7775E-01 1.0822E+01 -7.4929E+01 3.6375E+02 -8.8244E+02 9.1652E+02 S3 3.6264E-02 -1.0573E+00 1.3026E+01 -1.0860E+02 4.7481E+02 -1.0741E+03 9.3299E+02 S4 -6.4272E-01 2.6450E-01 -6.5121E-01 4.9504E+00 -4.4504E+01 1.4311E+02 -1.7244E+02 S5 -6.6686E-01 2.7957E-01 -1.4465E+00 9.8959E+00 -4.3086E+01 9.0270E+01 -7.0673E+01 S6 -4.6691E-01 8.5863E-01 -2.3844E+00 6.5823E+00 -1.1894E+01 1.2028E+01 -4.9982E+00 S7 -2.7275E-01 7.3041E-01 -1.9035E+00 3.5134E+00 -4.3177E+00 2.9981E+00 -8.8976E-01 S8 5.4403E-02 2.9408E-01 -1.1810E+00 1.8470E+00 -1.4534E+00 5.4085E-01 -8.3147E-02 S9 4.9210E-01 -1.2627E+00 7.9409E-01 -1.7836E-01 -2.7463E-01 2.5596E-01 0.0000E+00 S10 6.1977E-01 -1.7398E+00 2.0477E+00 -1.4071E+00 5.7523E-01 -1.3519E-01 1.5051E-02 S11 -7.4282E-01 4.2242E-01 -2.8951E-01 5.0654E-01 -4.7076E-01 1.8740E-01 -2.7359E-02 S12 -5.0853E-01 5.0095E-01 -3.3702E-01 1.4741E-01 -3.9092E-02 4.5221E-03 0.0000E+00

Table 10

FIG. 10A shows the on-axis chromatic aberration curve of the optical imaging lens group of Example 5, which represents the deviation of the converging point of light of different wavelengths after passing through the lens. 10B shows astigmatism curves of the optical imaging lens group of Example 5, which represent the meridional curvature of the image plane and the sagittal image plane curvature. FIG. 10C shows the distortion curve of the optical imaging lens group of Embodiment 5, which represents the magnitude of the distortion corresponding to different field angles. FIG. 10D shows the magnification chromatic aberration curve of the optical imaging lens group of Example 5, which represents the deviation of different image heights on the imaging plane after light passes through the lens. According to FIGS. 10A to 10D , it can be seen that the optical imaging lens group given in Embodiment 5 can achieve good imaging quality.

Example 6

The optical imaging lens group according to Embodiment 6 of the present application is described below with reference to FIGS. 11 to 12D . FIG. 11 shows a schematic structural diagram of an optical imaging lens group according to Embodiment 6 of the present application.

As shown in FIG. 11 , the optical imaging lens group sequentially includes from the object side to the image side: a first lens E1, a diaphragm STO, a second lens E2, a third lens E3, a fourth lens E4, a fifth lens E5, a Six lenses E6, filter E7 and imaging surface S15.

The first lens E1 has negative refractive power, the object side S1 is concave, and the image side S2 is concave. The second lens E2 has positive refractive power, the object side S3 is convex, and the image side S4 is concave. The third lens E3 has negative refractive power, the object side S5 is convex, and the image side S6 is concave. The fourth lens E4 has positive refractive power, the object side S7 is convex, and the image side S8 is convex. The fifth lens E5 has negative refractive power, the object side S9 is concave, and the image side S10 is concave. The sixth lens E6 has positive refractive power, the object side S11 is convex, and the image side S12 is concave. The filter E7 has an object side S13 and an image side S14. The light from the object sequentially passes through the surfaces S1 to S14 and is finally imaged on the imaging surface S15.

In this example, the total effective focal length f of the optical imaging lens group is 1.56mm, the total length TTL of the optical imaging lens group is 4.41mm, and the half of the diagonal length of the effective pixel area on the imaging plane S15 of the optical imaging lens group is ImgH is 1.72mm, the ratio f/EPD of the total effective focal length f of the optical imaging lens group to the entrance pupil diameter EPD of the optical imaging lens group is 2.30, and the maximum field of view FOV of the optical imaging lens group is 104.9°.

Table 11 shows the basic parameter table of the optical imaging lens group of Example 6, wherein the units of curvature radius, thickness/distance, and focal length are all millimeters (mm). Table 12 shows the coefficients of higher-order terms that can be used for each aspherical mirror surface in Example 6, where each aspherical surface type can be defined by the formula (1) given in Example 1 above.

Table 11

face number A4 A6 A8 A10 A12 A14 A16 S1 5.6505E-01 -7.0949E-01 9.0359E-01 -6.9133E-01 1.9458E-01 1.0076E-01 -6.3413E-02 S2 9.0466E-01 -2.7660E-01 2.2465E+00 -1.7383E+01 1.1100E+02 -2.9182E+02 3.0689E+02 S3 -1.6669E-02 1.4405E-02 -2.1830E+00 3.4172E+01 -2.5650E+02 8.7488E+02 -1.1056E+03 S4 -6.9030E-01 1.7042E+00 -1.4248E+01 8.2528E+01 -2.9869E+02 6.0617E+02 -5.0424E+02 S5 -8.9398E-01 2.1376E+00 -1.8113E+01 9.0362E+01 -2.8322E+02 4.9513E+02 -3.6565E+02 S6 -6.5196E-01 2.5205E+00 -9.7566E+00 2.6421E+01 -4.2098E+01 3.5974E+01 -1.2459E+01 S7 -4.1056E-01 1.4937E+00 -4.4661E+00 8.9015E+00 -1.1156E+01 7.7419E+00 -2.2869E+00 S8 2.9140E-01 -1.1051E+00 2.6046E+00 -4.0252E+00 3.7926E+00 -1.9442E+00 3.9431E-01 S9 5.7254E-01 -2.5305E+00 4.4708E+00 -5.4399E+00 3.5096E+00 -8.2264E-01 0.0000E+00 S10 4.1536E-01 -1.2472E+00 1.7474E+00 -1.5623E+00 8.7133E-01 -2.7217E-01 3.5951E-02 S11 -9.2102E-01 1.0827E+00 -8.1352E-01 3.9316E-01 -1.2657E-01 2.9442E-02 -4.3128E-03 S12 -5.0760E-01 5.3113E-01 -3.7351E-01 1.5699E-01 -3.4869E-02 2.9216E-03 0.0000E+00

Table 12

FIG. 12A shows the on-axis chromatic aberration curve of the optical imaging lens group of Example 6, which represents the deviation of the converging point of light of different wavelengths after passing through the lens. 12B shows astigmatism curves of the optical imaging lens group of Example 6, which represent the meridional curvature of the image plane and the sagittal image plane curvature. FIG. 12C shows the distortion curve of the optical imaging lens group of Example 6, which represents the distortion magnitude values corresponding to different field angles. FIG. 12D shows the magnification chromatic aberration curve of the optical imaging lens group of Example 6, which represents the deviation of different image heights on the imaging plane after light passes through the lens. According to FIGS. 12A to 12D , it can be seen that the optical imaging lens group given in Embodiment 6 can achieve good imaging quality.

In conclusion, Examples 1 to 6 satisfy the relationships shown in Table 13, respectively.

Conditional Expression/Example 1 2 3 4 5 6 ImgH×EPD/f(mm) 0.87 0.84 0.82 0.83 0.83 0.75 SD/TD 0.82 0.77 0.81 0.82 0.76 0.75 f/f5 -0.52 -0.98 -0.43 -0.66 -0.36 -0.75 f3/(f1+f3) 0.65 0.67 0.69 0.74 0.58 0.83 f/f2 0.53 1.15 0.84 0.61 0.75 0.50 DT12/R2 0.28 0.61 0.26 0.35 0.42 0.35 SAG51/(SAG51-SAG12) 0.67 0.41 0.54 0.63 0.61 0.55 DT42/DT61 0.64 0.77 0.63 0.80 0.79 0.69 ET4/CT4 0.46 0.45 0.45 0.40 0.31 0.36 ET5/DT51 0.59 0.52 0.65 0.66 0.43 0.74 R8/f4 -0.90 -0.73 -0.92 -0.94 -0.85 -0.84 R2/R3 1.04 0.53 1.18 0.59 0.65 1.06 R8/R9 0.54 0.28 0.61 0.23 0.36 0.19 R12/R11 0.85 0.64 0.94 0.62 0.59 0.88 CT2/(CT1+CT3+CT5) 0.76 0.76 0.46 0.55 0.50 0.37

Table 13

The present application also provides an imaging device whose electronic photosensitive element may be a photosensitive coupling element (CCD) or a complementary metal oxide semiconductor element (CMOS). The imaging device may be an independent imaging device such as a digital camera, or an imaging module integrated on a mobile electronic device such as a mobile phone. The imaging device is equipped with the above-described optical imaging lens group.

The above description is only a preferred embodiment of the present application and an illustration of the applied technical principles. Those skilled in the art should understand that the scope of the invention involved in this application is not limited to the technical solution formed by the specific combination of the above technical features, and should also cover the above technical features without departing from the inventive concept. Other technical solutions formed by any combination of its equivalent features. For example, a technical solution is formed by replacing the above-mentioned features with the technical features disclosed in this application (but not limited to) with similar functions.

Claims (10)

1. The optical imaging lens assembly, in order from an object side to an image side along an optical axis, comprises:

a first lens having a negative optical power;

a second lens having an optical power;

a third lens having a negative optical power;

a fourth lens having an optical power;

a fifth lens element having a negative refractive power, the object-side surface of which is concave; and

a sixth lens having a refractive power, an object-side surface of which is convex;

the maximum field angle FOV of the optical imaging lens group satisfies: 92 ° < FOV < 116 °; and

half of the diagonal length ImgH of the effective pixel area on the imaging surface of the optical imaging lens group, the total effective focal length f of the optical imaging lens group, and the entrance pupil diameter EPD of the optical imaging lens group satisfy: ImgH × EPD/f < 1 mm.

2. The optical imaging lens group of claim 1, wherein the effective focal length f5 of the fifth lens and the total effective focal length f of the optical imaging lens group satisfy: -1.5 < f/f5 < 0.

3. The optical imaging lens group of claim 1, wherein the effective focal length f1 of the first lens and the effective focal length f3 of the third lens satisfy: 0 < f3/(f1+ f3) < 1.0.

4. The optical imaging lens group of claim 1 wherein the total effective focal length f of the optical imaging lens group and the effective focal length f2 of the second lens satisfy: f/f2 is more than 0.3 and less than 1.3.

5. The optical imaging lens group of claim 1, wherein the maximum effective radius DT12 of the image side surface of the first lens and the radius of curvature R2 of the image side surface of the first lens satisfy: 0 < DT12/R2 < 1.0.

6. The optical imaging lens group of claim 1, wherein a distance SAG12 on the optical axis from an intersection point of the image-side surface of the first lens and the optical axis to an effective radius vertex of the image-side surface of the first lens to a distance SAG51 on the optical axis from an intersection point of the object-side surface of the fifth lens and the optical axis to an effective radius vertex of the object-side surface of the fifth lens satisfies: 0.3 < SAG51/(SAG51-SAG12) < 0.8.

7. The optical imaging lens group of claim 1, wherein the maximum effective radius DT42 of the image side surface of the fourth lens and the maximum effective radius DT61 of the object side surface of the sixth lens satisfy: 0.5 < DT42/DT61 < 1.0.

8. The optical imaging lens group of claim 1 wherein a center thickness CT4 of the fourth lens on the optical axis and an edge thickness ET4 of the fourth lens satisfy: 0.2 < ET4/CT4 < 0.7.

9. The optical imaging lens group of claim 1, wherein the edge thickness ET5 of the fifth lens and the maximum effective radius DT51 of the object side surface of the fifth lens satisfy: 0.2 < ET5/DT51 < 1.0.

10. The optical imaging lens assembly, in order from an object side to an image side along an optical axis, comprises:

a first lens having a negative optical power;

a second lens having an optical power;

a third lens having a negative optical power;

a fourth lens having an optical power;

a fifth lens element having a negative refractive power, the object-side surface of which is concave; and

a sixth lens having a refractive power, an object-side surface of which is convex;

the maximum field angle FOV of the optical imaging lens group satisfies: 92 ° < FOV < 116 °; and

a distance SAG12 on the optical axis from an intersection point of the image-side surface of the first lens and the optical axis to an effective radius vertex of the image-side surface of the first lens to a distance SAG51 on the optical axis from an intersection point of the object-side surface of the fifth lens and the optical axis to an effective radius vertex of the object-side surface of the fifth lens satisfies: 0.3 < SAG51/(SAG51-SAG12) < 0.8.

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