TW201819981A - Lens assembly - Google Patents

Abstract

A lens assembly includes a first lens, a second lens, a third lens, a fourth lens, a fifth lens and a sixth lens, all of which are arranged in order from an object side to an image side along an optical axis. The first lens is a meniscus lens with negative refractive power. The second lens is a meniscus lens with negative refractive power. The third lens is a biconvex lens with positive refractive power. The fourth lens is a biconvex lens with positive refractive power. The fifth lens is a biconcave lens with negative refractive power. The sixth lens is a biconvex lens with positive refractive power. The lens assembly satisfies the following condition: 6 < FEFL/BEFL < 10 wherein FEFL is an effective focal length of a combination of the first lens, the second lens and the third lens, BEFL is an effective focal length of a combination of the fourth lens, the fifth lens and the sixth lens.

Description

Imaging lens (16)

The invention relates to an imaging lens.

The current development trend of imaging lenses, in addition to the continuous development of miniaturization and large angles of view, with different application requirements, it also needs to have both large aperture and resistance to environmental temperature changes, conventional imaging lenses can no longer meet today's In order to meet the needs of miniaturization, large angle of view, large aperture and resistance to environmental temperature changes, another new architecture imaging lens is needed.

In view of this, the main purpose of the present invention is to provide an imaging lens with a short total lens length, a large angle of view, a small aperture value, and resistance to environmental temperature changes, but still having good optical performance.

The imaging lens of the present invention includes a first lens, a second lens, a third lens, a fourth lens, a fifth lens and a sixth lens in sequence along an optical axis from an object side to an image side . The first lens is a crescent lens with negative refractive power. The second lens is a crescent lens with negative refractive power. The third lens, the fourth lens, and the sixth lens are biconvex lenses with positive refractive power. The fifth lens is a biconcave lens with negative refractive power. The imaging lens meets the following conditions: 6<FEFL/BEFL<10, where FEFL is the effective focal length of the combination of the first lens, the second lens, and the third lens, and BEFL is the effective combination of the fourth lens, the fifth lens, and the sixth lens focal length.

The imaging lens of the present invention includes a first lens, a second lens, a third lens, a fourth lens, a fifth lens and a sixth lens in sequence along an optical axis from an object side to an image side . The first lens is a crescent lens with negative refractive power. The second lens is a crescent lens with negative refractive power. The third lens, the fourth lens, and the sixth lens are biconvex lenses with positive refractive power. The fifth lens is a biconcave lens with negative refractive power. The imaging lens meets the following conditions: 175<FOV/f<190; where FOV is one of the full-angle of the imaging lens, the unit of this full-angle is degree, f is one of the effective focal length of the imaging lens, the unit of this effective focal length is mm.

The imaging lens meets the following conditions: HFOV 175 degrees; VFOV 115 degrees; where, HFOV is one of the horizontal angles of the imaging lens, and VFOV is one of the vertical angles of the imaging lens.

The imaging lens satisfies the following conditions: 175<FOV/f<190; where FOV is one of the full-angle of the imaging lens, the unit of this full-angle is degrees, and f is one of the effective focal length of the imaging lens, the unit of this effective focal length Is mm.

The imaging lens satisfies the following conditions: 1<TTL/D ₁ <1.5; where TTL is the distance between the object side of the first lens and an imaging plane on the optical axis, and D ₁ is the effective diameter of the first lens.

The imaging lens satisfies the following conditions: Vd ₂ -Vd ₃ <5; where Vd ₂ is the Abbe coefficient of the second lens and Vd ₃ is the Abbe coefficient of the third lens.

The second lens may further include an inflection point.

The second lens, the third lens, the fifth lens and the sixth lens are made of plastic materials.

Among them, at least one surface of the second lens, the third lens, the fourth lens, the fifth lens and the sixth lens is an aspheric surface or both surfaces are aspheric surfaces.

The imaging lens of the present invention may further include an aperture disposed between the third lens and the fourth lens.

The first lens may further include a convex surface facing the object side and a concave surface facing the image side, and the second lens may further include a convex surface facing the object side and a concave surface facing the image side.

In order to make the above objects, features, and advantages of the present invention more comprehensible, preferred embodiments are described in detail below in conjunction with the accompanying drawings.

1, 2, 3‧‧‧ imaging lens

L11, L21, L31 ‧‧‧ first lens

L12, L22, L32 ‧‧‧ second lens

L13, L23, L33 ‧‧‧ third lens

L14, L24, L34 ‧‧‧ fourth lens

L15, L25, L35 ‧‧‧ fifth lens

L16, L26, L36 ‧‧‧ sixth lens

ST1, ST2, ST3 ‧‧‧ aperture

OF1, OF2, OF3 ‧‧‧ filter

IMA1, IMA2, IMA3 ‧‧‧ imaging surface

OA1, OA2, OA3 ‧‧‧ optical axis

S11, S12, S13, S14, S15, S16, S17

S18, S19, S110, S111, S112, S113

S114, S115

S21, S22, S23, S24, S25, S26, S27

S28, S29, S210, S211, S212, S213

S214, S215

S31, S32, S33, S34, S35, S36, S37

S38, S39, S310, S311, S312, S313

S314, S315

FIG. 1 is a schematic diagram of a lens configuration according to the first embodiment of the imaging lens of the present invention.

Figure 2A is a longitudinal aberration diagram of the imaging lens of Figure 1.

Figure 2B is a field curvature diagram of the imaging lens of Figure 1.

Figure 2C is a distortion diagram of the imaging lens of Figure 1.

FIG. 3 is a schematic diagram of a lens configuration according to a second embodiment of the imaging lens of the present invention.

Figure 4A is a longitudinal aberration diagram of the imaging lens of Figure 3.

Figure 4B is a field curvature diagram of the imaging lens of Figure 3.

Figure 4C is a distortion diagram of the imaging lens of Figure 3.

FIG. 5 is a schematic diagram of a lens configuration of a third embodiment of the imaging lens according to the present invention.

Figure 6A is a longitudinal aberration diagram of the imaging lens of Figure 5.

Figure 6B is a graph of the field curvature of the imaging lens of Figure 5.

Figure 6C is a distortion diagram of the imaging lens of Figure 5.

Please refer to FIG. 1, which is a schematic diagram of a lens configuration according to the first embodiment of the imaging lens of the present invention. The imaging lens 1 includes a first lens L11, a second lens L12, a third lens L13, an aperture ST1, a fourth lens L14, a first lens in order from an object side to an image side along an optical axis OA1 Five lenses L15, a sixth lens L16 and a filter OF1. When imaging, the light from the object side is finally imaged on an imaging surface IMA1.

The first lens L11 is a crescent-shaped lens with negative refractive power made of glass material. Its object side S11 is convex, the image side S12 is concave, and both the object side S11 and the image side S12 are spherical surfaces.

The second lens L12 is a crescent-shaped lens with a negative refractive power made of plastic material. Its object side S13 is convex and has a second inflexion point. The image side S14 is concave. Both the object side S13 and the image side S14 are aspherical surfaces.

The third lens L13 is a biconvex lens with positive refractive power made of plastic material. Its object side S15 is convex, the image side S16 is convex, and both the object side S15 and the image side S16 are aspherical surfaces.

The fourth lens L14 is a biconvex lens with positive refractive power made of glass material. Its object side S18 is convex, the image side S19 is convex, and both the object side S18 and the image side S19 are aspherical surfaces.

The fifth lens L15 is a biconcave lens with a negative refractive power made of plastic material. Its object side S110 is concave, the image side S111 is concave, and both the object side S110 and the image side S111 are aspherical surfaces.

The sixth lens L16 is a biconvex lens with positive refractive power made of plastic material. Its object side S112 is convex, the image side S113 is convex, and both the object side S112 and the image side S113 are aspherical surfaces.

The object side S114 and the image side S115 of the filter OF1 are both flat.

In addition, the imaging lens 1 in the first embodiment satisfies at least one of the following conditions: 6<FEFL1/BEFL1<10 (1)

175<FOV1/f1<190 (4)

1<TTL1/D1 ₁ <1.5 (5)

Vd1 ₂ -Vd1 ₃ <5 (6)

Among them, FEFL1 is the combined effective focal length of the first lens L11, the second lens L12 and the third lens L13, BEFL1 is the combined effective focal length of the fourth lens L14, the fifth lens L15 and the sixth lens L16, satisfying the condition: 5<FEFL1 /BEFL1<10, can reduce the impact of temperature changes on imaging quality. HFOV1 is the horizontal angle of the imaging lens 1. VFOV1 is the vertical angle of the imaging lens 1. FOV1 is the full-angle of the imaging lens 1, the unit of this full-angle is degrees, f1 is the effective focal length of the imaging lens 1, the unit of the effective focal length is mm, and the condition is satisfied: 175<FOV1/f1<190, the picture can be suppressed distortion. TTL1 is the distance between the object side S11 of the first lens L11 and the imaging plane IMA1 on the optical axis OA1. The unit of this distance is mm. D1 ₁ is the effective diameter of the first lens L11, which satisfies the condition: 1<TTL1/D1 ₁ < 1.5, can suppress the picture distortion. Vd1 ₂ is the Abbe coefficient of the second lens L12, and Vd1 ₃ is the Abbe coefficient of the third lens L13, which satisfies the condition: Vd1 ₂ -Vd1 ₃ <5, which can suppress peripheral chromatic aberration.

The use of the above lens, aperture and design that satisfies at least one of the conditions (1) to (6) enables the imaging lens 1 to effectively shorten the total lens length, reduce the aperture value, increase the angle of view, and effectively correct aberrations, Reduce the impact of temperature changes on imaging quality.

Table 1 is a table of related parameters of each lens of the imaging lens 1 in FIG. 1. The data in Table 1 shows that the effective focal length of the imaging lens 1 of the first embodiment is equal to 1.029 mm, the aperture value is equal to 2.016, and the total lens length is equal to 13.5 mm.

The aspherical surface concave degree z of each lens in Table 1 is obtained by the following formula: z=ch ² /{1+[1-(k+1)c ² h ² ] ^1/2 }+Ah ⁴ +Bh ⁶ + Ch ⁸ +Dh ¹⁰

Among them: c: curvature; h: vertical distance from any point on the lens surface to the optical axis; k: conic coefficient; A~D: aspherical coefficient.

Table 2 is the related parameter table of the aspherical surface of each lens in Table 1, where k is the conic constant and A~D are the aspherical coefficients.

In the imaging lens 1 of the first embodiment, the effective focal length of the combination of the first lens L11, the second lens L12, and the third lens L13 is FEFL1=22.619 mm, and the combination of the fourth lens L14, fifth lens L15, and sixth lens L16 is effective Focal length BEFL1=3.107mm, horizontal picture angle HFOV1=180.1 degrees, vertical picture angle VFOV1=120 degrees, full picture angle FOV=189 degrees, effective focal length f1 of imaging lens 1=1.029mm, object side S11 of the first lens L11 to The distance between the imaging surface IMA1 and the optical axis OA1 is TTL1=13.5mm, the effective diameter D1 _{1 of the} first lens L11 = 10.454mm, the Abbe coefficient Vd1 _{2 of the} second lens L12=25.6, and the Abbe coefficient Vd1 of the third lens L13 ₃ = 23.3, FEFL1/BEFL1=7.280, HFOV1=180.1, VFOV1=120, FOV1/f1=183.673, TTL1/D1 ₁ =1.291, Vd1 ₂ -Vd1 ₃ =2.3, all of which can meet the above conditions ( 1) To the requirements of condition (6).

In addition, the optical performance of the imaging lens 1 of the first embodiment can also meet the requirements, as can be seen from FIGS. 2A to 2C. Shown in FIG. 2A is a longitudinal aberration (Longitudinal Aberration) diagram of the imaging lens 1 of the first embodiment. Shown in FIG. 2B is a field curvature diagram of the imaging lens 1 of the first embodiment. Shown in FIG. 2C is a distortion diagram of the imaging lens 1 of the first embodiment.

As can be seen from FIG. 2A, the imaging lens 1 of the first embodiment has a longitudinal aberration value of -0.03 mm for light rays with wavelengths of 0.455 μm, 0.502 μm, 0.614 μm, 0.558 μm, 0.661 μm, and 0.950 μm. To 0.015mm.

It can be seen from FIG. 2B that the imaging lens 1 of the first embodiment has a wavelength of 0.455 μm, 0.502 μm, 0.614 μm, 0.558 μm, 0.661 μm, 0.950 μm, and the sagittal (Tangential) direction. ) The field curvature in the direction is between -0.05mm and 0.035mm.

As can be seen from Figure 2C (the six lines in the figure almost overlap, so that only one line appears), the imaging lens 1 of the first embodiment has a pair of wavelengths of 0.455 μm, 0.502 μm, 0.614 μm, 0.558 μm, 0.661 The distortion produced by the light of μm and 0.950μm is between -100% and 0%.

It is obvious that the longitudinal aberration, field curvature, and distortion of the imaging lens 1 of the first embodiment can be effectively corrected, so as to obtain better optical performance.

Please refer to FIG. 3, which is a schematic diagram of a lens configuration according to a second embodiment of the imaging lens of the present invention. The imaging lens 2 includes a first lens L21, a second lens L22, a third lens L23, an aperture ST2, a fourth lens L24, a first lens in order from an object side to an image side along an optical axis OA2 Five lenses L25, a sixth lens L26 and a filter OF2. When imaging, the light from the object side is finally imaged on an imaging surface IMA2.

The first lens L21 is a crescent-shaped lens with negative refractive power made of glass material. Its object side S21 is convex, the image side S22 is concave, and both the object side S21 and the image side S22 are spherical surfaces.

The second lens L22 is a crescent-shaped lens with negative refractive power made of plastic material. Its object side S23 is convex and has a double reflex point, the image side S24 is concave, and both the object side S23 and the image side S24 are aspherical surfaces.

The third lens L23 is a biconvex lens made of plastic material with positive refractive power. The object side S25 is convex, the image side S26 is convex, and both the object side S25 and the image side S26 are aspherical surfaces.

The fourth lens L24 is a biconvex lens with positive refractive power made of glass material. Its object side S28 is convex, the image side S29 is convex, and both the object side S28 and the image side S29 are aspherical surfaces.

The fifth lens L25 is a biconcave lens made of plastic material with negative refractive power. The object side S210 is concave, the image side S211 is concave, and both the object side S210 and the image side S211 are aspherical surfaces.

The sixth lens L26 is a biconvex lens with positive refractive power made of plastic material. Its object side S212 is convex, the image side S213 is convex, and both the object side S212 and the image side S213 are aspherical surfaces.

The object side S214 and the image side S215 of the filter OF2 are both flat.

In addition, the imaging lens 2 in the second embodiment satisfies at least one of the following conditions: 6<FEFL2/BEFL2<10 (7)

175<FOV2/f2<190 (10)

1<TTL2/D2 ₁ <1.5 (11)

Vd2 ₂ -Vd2 ₃ <5 (12)

The above definitions of FEFL2, BEFL2, HFOV2, VFOV2, FOV2, f2, TTL2, D2 ₁ , Vd2 ₂ and Vd2 _{3 are} the same as those of the first embodiment FEFL1, BEFL1, HFOV1, VFOV1, FOV1, f1, TTL1, D1 ₁ , Vd1 ₂ The definitions of Vd1 and _{3 are} the same. The functions of condition (7) to condition (12) are also the same as those of condition (1) to condition (6) in the first embodiment, and are not repeated here.

By using the above lens, aperture and design that satisfies at least one of the conditions (7) to (12), the imaging lens 2 can effectively shorten the total lens length, reduce the aperture value, increase the angle of view, and effectively correct aberration, Reduce the impact of temperature changes on imaging quality.

Table 3 is a table of related parameters of each lens of the imaging lens 2 in FIG. 3. The data in Table 3 shows that the effective focal length of the imaging lens 2 of the second embodiment is equal to 1.041 mm, the aperture value is equal to 2.017, and the total lens length is equal to 13.5 mm.

The aspherical surface depression degree z of each lens in Table 3 is obtained by the following formula: z=ch ² /{1+[1-(k+1)c ² h ² ] ^1/2 }+Ah ⁴ +Bh ⁶ + Ch ⁸ +Dh ¹⁰

Among them: c: curvature; h: vertical distance from any point on the lens surface to the optical axis; k: conic coefficient; A~D: aspherical coefficient.

Table 4 is the related parameter table of the aspherical surface of each lens in Table 3, where k is the conic constant and A~D is the aspherical coefficient.

The imaging lens 2 of the second embodiment has FEFL2=27.628mm, BEFL2=3.172mm, HFOV2=180.2 degrees, VFOV2=121.8 degrees, FOV2=188.6 degrees, f2=1.041mm, TTL2=13.5mm, D2 ₁ =10.065mm , Vd2 ₂ = 25.6, Vd2 ₃ = 23.3, FEFL2/BEFL2=8.710, HFOV2=180.2, VFOV2=121.8, FOV2/f2=181.172, TTL2/D2 ₁ =1.341, Vd2 ₂ -Vd2 ₃ =2.3 , Can meet the requirements of the above conditions (7) to (12).

In addition, the optical performance of the imaging lens 2 of the second embodiment can also meet the requirements, as can be seen from FIGS. 4A to 4C. FIG. 4A is a longitudinal aberration (Longitudinal Aberration) diagram of the imaging lens 2 of the second embodiment. Shown in FIG. 4B is a field curvature diagram of the imaging lens 2 of the second embodiment. Shown in FIG. 4C is a distortion diagram of the imaging lens 2 of the second embodiment.

It can be seen from FIG. 4A that the imaging lens 2 of the second embodiment has a longitudinal aberration value between -0.025 mm for light rays with wavelengths of 0.455 μm, 0.502 μm, 0.614 μm, 0.558 μm, 0.661 μm, and 0.950 μm. To 0.01mm.

As can be seen from FIG. 4B, the imaging lens 2 of the second embodiment has a wavelength of 0.455 μm, 0.502 μm, 0.614 μm, 0.558 μm, 0.661 μm, 0.950 μm, and the sagittal (Tangential) direction. ) The field curvature in the direction is between -0.06mm and 0.04mm.

As can be seen from Figure 4C (the six lines in the figure almost overlap, so that there is only one line), the imaging lens 2 of the second embodiment has a wavelength of 0.455μm, 0.502μm, 0.614μm, 0.558μm, 0.661 The distortion produced by the light of μm and 0.950μm is between -100% and 0%.

It is obvious that the longitudinal aberration, field curvature, and distortion of the imaging lens 2 of the second embodiment can be effectively corrected to obtain better optical performance.

Please refer to FIG. 5, which is a schematic diagram of a lens configuration according to a third embodiment of the imaging lens of the present invention. The imaging lens 3 includes a first lens L31, a second lens L32, a third lens L33, an aperture ST3, a fourth lens L34, a first lens in order from an object side to an image side along an optical axis OA3 Five lenses L35, a sixth lens L36 and a filter OF3. When imaging, the light from the object side is finally imaged on an imaging surface IMA3.

The first lens L31 is a crescent-shaped lens with negative refractive power made of glass material. Its object side S31 is convex, the image side S32 is concave, and both the object side S31 and the image side S32 are spherical surfaces.

The second lens L32 is a crescent-shaped lens with a negative refractive power made of plastic material. Its object side S33 is convex and has a double reflex point. The image side S34 is concave. Both the object side S33 and the image side S34 are aspherical surfaces.

The third lens L33 is a biconvex lens with positive refractive power made of plastic material. Its object side S35 is convex, the image side S36 is convex, and both the object side S35 and the image side S36 are aspherical surfaces.

The fourth lens L34 is a biconvex lens with positive refractive power made of glass material, its object side S38 is convex, the image side S39 is convex, and both the object side S38 and the image side S39 are aspherical surfaces.

The fifth lens L35 is a biconcave lens made of plastic material with negative refractive power. Its object side S310 is concave, the image side S311 is concave, and both the object side S310 and the image side S311 are aspherical surfaces.

The sixth lens L36 is a biconvex lens with positive refractive power made of plastic material. Its object side S312 is convex, the image side S313 is convex, and both the object side S312 and the image side S313 are aspherical surfaces.

The object side S314 and the image side S315 of the filter OF3 are both flat.

In addition, the imaging lens 3 in the third embodiment satisfies at least one of the following conditions: 6<FEFL3/BEFL3<10 (13)

175<FOV3/f3<190 (16)

1<TTL3/D3 ₁ <1.5 (17)

Vd3 ₂ -Vd3 ₃ <5 (18)

The above definitions of FEFL3, BEFL3, HFOV3, VFOV3, FOV3, f3, TTL3, D3 ₁ , Vd3 ₂ and Vd3 _{3 are} the same as FEFL1, BEFL1, HFOV1, VFOV1, FOV1, f1, TTL1, D1 ₁ , Vd1 _{2 in the} first embodiment and the same Vd1 _3, the condition (13) to condition (18) of the function also in the same conditions as in the first embodiment (1) to the condition (6) of the function, not be further described in Cijie.

By using the above lens, aperture and design that satisfies at least one of the conditions (13) to (18), the imaging lens 3 can effectively shorten the total lens length, reduce the aperture value, increase the angle of view, and effectively correct aberration, Reduce the impact of temperature changes on imaging quality.

Table 5 is a table of related parameters of each lens of the imaging lens 3 in FIG. 5. The data in Table 5 shows that the effective focal length of the imaging lens 3 of the third embodiment is equal to 1.046 mm, the aperture value is equal to 2.016, and the total lens length is equal to 13.5 mm.

The aspherical surface depression degree z of each lens in Table 5 is obtained by the following formula: z=ch ² /{1+[1-(k+1)c ² h ² ] ^1/2 }+Ah ⁴ +Bh ⁶ + Ch ⁸ +Dh ¹⁰

Among them: c: curvature; h: vertical distance from any point on the lens surface to the optical axis; k: conic coefficient; A~D: aspherical coefficient.

Table 6 is the related parameter table of the aspherical surface of each lens in Table 5, where k is the conic constant and A~D are the aspherical coefficients.

The imaging lens 3 of the third embodiment has FEFL3=24.682mm, BEFL3=3.155mm, HFOV3=180.2 degrees, VFOV3=120.0 degrees, FOV3=188.6 degrees, f3=1.046mm, TTL3=13.5mm, D3 ₁ =10.452mm , Vd3 ₂ = 25.6, Vd3 ₃ = 23.3, FEFL3/BEFL3=7.823, HFOV3=180.2, VFOV3=120.0, FOV3/f3=180.306, TTL3/D3 ₁ = 1.291, Vd3 ₂ -Vd3 ₃ =2.3 , Can meet the requirements of the above conditions (13) to (18).

In addition, the optical performance of the imaging lens 3 of the third embodiment can also meet the requirements, as can be seen from FIGS. 6A to 6C. FIG. 6A shows a longitudinal aberration (Longitudinal Aberration) diagram of the imaging lens 3 of the third embodiment. FIG. 6B shows a field curvature diagram of the imaging lens 3 of the third embodiment. Shown in FIG. 6C is a distortion diagram of the imaging lens 3 of the third embodiment.

As can be seen from FIG. 6A, the imaging lens 3 of the third embodiment has a longitudinal aberration value of -0.035mm for light with wavelengths of 0.455μm, 0.502μm, 0.614μm, 0.558μm, 0.661μm, 0.950μm To 0.015mm.

As can be seen from FIG. 6B, the imaging lens 3 of the third embodiment has a wavelength of 0.455 μm, 0.502 μm, 0.614 μm, 0.558 μm, 0.661 μm, 0.950 μm, and the sagittal (Tangential) direction. ) The field curvature in the direction is between -0.06mm and 0.04mm.

It can be seen from Figure 6C (the six lines in the figure almost overlap so that there is only one line), the imaging lens 3 of the third embodiment has a pair of wavelengths of 0.455μm, 0.502μm, 0.614μm, 0.558μm, 0.661 The distortion produced by the light of μm and 0.950μm is between -100% and 0%.

It is obvious that the longitudinal aberration, field curvature, and distortion of the imaging lens 3 of the third embodiment can be effectively corrected, thereby obtaining better optical performance.

Claims (10)

An imaging lens, along an optical axis, from an object side to an image side in sequence includes: a first lens, the first lens is a crescent-shaped lens with negative refractive power; a second lens, the second lens is new The lunar lens has negative refractive power; a third lens, the third lens is a biconvex lens with positive refractive power; a fourth lens, the fourth lens is a biconvex lens with positive refractive power; a fifth lens, the fifth lens is double The concave lens has negative refractive power; and a sixth lens, the sixth lens is a biconvex lens with positive refractive power; wherein the imaging lens satisfies the following conditions: 6<FEFL/BEFL<10 where FEFL is the first lens and the second lens And the combined effective focal length of the third lens, BEFL is the combined effective focal length of the fourth lens, the fifth lens, and the sixth lens. An imaging lens, along an optical axis, from an object side to an image side in sequence includes: a first lens, the first lens is a crescent-shaped lens with negative refractive power; a second lens, the second lens is a new The lunar lens has negative refractive power; a third lens, the third lens is a biconvex lens with positive refractive power; a fourth lens, the fourth lens is a biconvex lens with positive refractive power; a fifth lens, the fifth lens is double The concave lens has negative refractive power; and a sixth lens, the sixth lens is a biconvex lens with positive refractive power; wherein the imaging lens satisfies the following conditions: 175<FOV/f<190 where FOV is a full-angle of the imaging lens, The unit of the full-angle is degree, f is one of the effective focal lengths of the imaging lens, and the unit of the effective focal length is mm. The imaging lens as described in item 1 or 2 of the patent application scope, wherein the imaging lens satisfies the following conditions: HFOV 175 degrees; VFOV 115 degrees; where, HFOV is one of the horizontal angles of the imaging lens, and VFOV is one of the vertical angles of the imaging lens. The imaging lens as described in item 1 or 2 of the patent application scope, wherein the imaging lens satisfies the following conditions: 1<TTL/D ₁ <1.5 where TTL is the object side of the first lens to an imaging plane at the light For a pitch on the axis, D _{1 is} the effective diameter of the first lens. The imaging lens as described in item 1 or 2 of the patent application scope, wherein the imaging lens satisfies the following conditions: Vd ₂ -Vd ₃ <5 where Vd _{2 is} the Abbe coefficient of the second lens and Vd _{3 is} the first Abbe coefficient of three lenses. The imaging lens as described in item 1 or 2 of the patent application, wherein the second lens further includes an inflection point. The imaging lens as described in item 1 or 2 of the patent application, wherein the second lens, the third lens, the fifth lens, and the sixth lens are made of plastic materials. The imaging lens as described in item 1 or 2 of the patent application scope, wherein at least one surface of the second lens, the third lens, the fourth lens, the fifth lens and the sixth lens is an aspheric surface or two All surfaces are aspherical surfaces. The imaging lens as described in item 1 or 2 of the patent application scope further includes an aperture disposed between the third lens and the fourth lens. The imaging lens of claim 1 or claim 2, wherein the first lens further includes a convex surface facing the object side and a concave surface facing the image side, the second lens further includes a convex surface facing the object side and A concave surface faces the image side.