Optical Imaging Lens Device

Abstract

To provide an optical imaging lens arrangement having the advantage of excellent imaging quality. [Solution] The optical imaging lens device includes a first lens group, an aperture, and a second lens group, arranged in this order from the object side to the image side along the optical axis. The first lens group is composed of a first lens, a second lens, and a third lens arranged along the optical axis from the object side to the image side, and the arrangement of refractive powers from the first lens to the third lens is negative, negative, and positive. The second lens group is composed of a fourth lens, a fifth lens, a sixth lens, and a seventh lens arranged along the optical axis from the object side to the image side, and the arrangement of refractive powers from the fourth lens to the seventh lens is positive, positive, negative, and positive. There are gaps between the seven lenses, and they are not bonded to each other. The lens arrangement of the optical imaging lens device results in a 0.2

Description

[Technical field]

[0001] The present invention relates to the application field of optical imaging systems, and in particular to an optical imaging lens arrangement with low distortion and excellent imaging quality. [Background technology]

[0002] In recent years, as portable electronic products with photography functions become more popular, the demand for optical systems continues to grow. Typical optical systems use charge coupled devices (CCDs) and complementary metal-oxide semiconductor sensors (CMOS sensors). As semiconductor manufacturing technology improves, the pixel size of photosensitive elements becomes smaller, and optical systems are gradually developed into the field of high pixels. At the same time, as unmanned aerial vehicles and self-driving cars are rapidly developed, advanced driver assistance systems (ADAS) play an extremely important role. These systems collect environmental information in real time by attaching sensors to various lens devices, providing more comprehensive information to the driver. In addition, the quality of lens devices for vehicles is also increasing day by day as the temperature changes of the external environment require higher quality of the lens devices. Summary of the Invention [Problem to be solved by the invention]

[0003] Generally, a good imaging lens system has advantages such as low distortion and high resolution. However, in practical applications, the problems of small size and cost should also be considered. Therefore, it is one of the difficult problems for designers to design a lens system with good imaging quality under various restrictive conditions.

Means for Solving the Problem

[0004] In view of this, an object of the present invention is to provide an optical imaging lens device having the advantage of excellent imaging quality.

[0005] To achieve the above object, the optical imaging lens device provided by the present invention includes a first lens group, an aperture, and a second lens group in order from the object side to the image side along the optical axis. The first lens group is composed of a first lens, a second lens, and a third lens arranged along the optical axis from the object side to the image side. Among them, the first lens has a negative refractive power, the object-side surface of the first lens is convex, and the image-side surface of the first lens is concave. The second lens has a negative refractive power, and the image-side surface of the second lens is concave. The third lens has a positive refractive power, and the image-side surface of the third lens is convex. The second lens group is composed of a fourth lens, a fifth lens, a sixth lens, and a seventh lens arranged along the optical axis from the object side to the image side. Among them, the fourth lens is a biconvex lens having a positive refractive power. The fifth lens has a positive refractive power, and the image-side surface of the fifth lens is convex. The sixth lens is a biconcave lens having a negative refractive power. The seventh lens is a biconvex lens having a positive refractive power. Among them, between two adjacent lenses from the first lens to the seventh lens, there are air interval distances along the optical axis respectively. Moreover, the optical imaging lens device satisfies the condition of 0.2 < F / fg2 < 0.5, where F is the focal length of the optical imaging lens device and fg2 is the combined focal length of the second lens group.

Effect of the Invention

[0006] The effect of the present invention is that the optical imaging lens device arranges the optical assembly using at least seven lenses, accurately arranges the refractive power of the optical imaging lens device, and satisfies specific conditions, thereby achieving excellent imaging quality.

Brief Description of the Drawings

[0007] [Figure 1A] 1 is a schematic diagram of a configuration of an optical imaging lens device according to a first embodiment of the present invention. [Figure 1B] FIG. 2 is a longitudinal spherical aberration diagram of the optical imaging lens device according to the first embodiment of the present invention. [Figure 1C] FIG. 2 is a lateral spherical aberration diagram of the optical imaging lens device according to the first embodiment of the present invention. [Figure 2A] FIG. 4 is a schematic diagram of a configuration of an optical imaging lens device according to a second embodiment of the present invention. [Figure 2B] FIG. 6 is a longitudinal spherical aberration diagram of the optical imaging lens device according to the second embodiment of the present invention. [Figure 2C] FIG. 6 is a lateral spherical aberration diagram of the optical imaging lens device according to the second embodiment of the present invention. [Figure 3A] FIG. 11 is a schematic diagram of a configuration of an optical imaging lens device according to a third embodiment of the present invention. [Figure 3B] FIG. 11 is a longitudinal spherical aberration diagram of the optical imaging lens device according to the third embodiment of the present invention. [Figure 3C] FIG. 11 is a lateral spherical aberration diagram of the optical imaging lens device according to the third embodiment of the present invention. DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS

[0008] In order to more clearly explain the present invention, preferred embodiments will be described below with reference to the drawings. Referring to FIG. 1A, an optical imaging lens device 100 according to a first embodiment of the present invention includes a first lens group G1, an aperture S7, and a second lens group G2 arranged along the optical axis Z from the object side to the image side. In the first embodiment, the optical imaging lens device 100 has at least seven lenses. Among them, the first lens group G1 is composed of a first lens L1, a second lens L2, and a third lens L3 arranged along the optical axis Z from the object side to the image side. The second lens group G2 is composed of a fourth lens L4, a fifth lens L5, a sixth lens L6, and a seventh lens L7 arranged along the optical axis Z from the object side to the image side. In this embodiment, there is an air gap distance on the optical axis Z between each two adjacent lenses from the first lens L1 to the seventh lens L7. This means that while the first lens L1 to the seventh lens L7 are all single lenses, any two adjacent lenses among the first lens L1 to the seventh lens L7 cannot become a compound lens due to the adhesive.

[0009] The first lens L1 has negative refractive power, an object side surface S1 of the first lens L1 is a convex surface, and an image side surface S2 of the first lens L1 is a concave surface, of which the object side surface S1 and the image side surface S2 of the first lens L1 are both spherical surfaces.

[0010] The second lens L2 has negative refractive power, an object side surface S3 of the second lens L2 is a convex surface, an image side surface S4 of the second lens L2 is a concave surface, and among them, the object side surface S3 and the image side surface S4 of the second lens L2 are both aspheric surfaces.

[0011] The third lens L3 has positive refractive power, an object side surface S5 of the third lens L3 is a concave surface, and an image side surface S6 of the third lens L3 is a convex surface, of which the object side surface S5 and the image side surface S6 of the third lens L3 are both aspheric surfaces.

[0012] The fourth lens L4 is a biconvex lens having positive refractive power, and both the object side surface S8 and the image side surface S9 of the fourth lens L4 are spherical.

[0013] The fifth lens L5 has positive refractive power, an object side surface S10 of the fifth lens L5 is a concave surface, and an image side surface S11 of the fifth lens L5 is a convex surface, of which the object side surface S10 and the image side surface S11 of the fifth lens L5 are both aspheric surfaces.

[0014] The sixth lens L6 is a biconcave lens having negative refractive power, and both the object side surface S12 and the image side surface S13 of the sixth lens L6 are aspheric.

[0015] The seventh lens L7 is a biconvex lens having positive refractive power, and both the object side surface S14 and the image side surface S15 of the seventh lens L7 are aspheric.

[0016] In addition, the optical imaging lens device 100 further includes an infrared filter L8 and a protective glass L9, in which the surface of the infrared filter L8 facing the object side forms an object side surface S16, and the surface of the infrared filter L8 facing the image side forms an image side surface S17. The infrared filter L8 is located on one side of the image side surface S15 of the seventh lens L7, and is used to limit the infrared spectrum received by the optical imaging lens device 100 to improve the quality and realism of the movie. The surface of the protective glass L9 facing the object side forms an object side surface S18, and the surface of the protective glass L9 facing the image side forms an image side surface S19. In addition, the protective glass L9 is installed on one side of the infrared filter L8, and is located between the infrared filter L8 and the image plane Im, and is used to protect the infrared filter L8.

[0017] In order to ensure that the optical imaging lens arrangement 100 according to the present invention has excellent optical performance and a high level of imaging quality, in a first embodiment, the optical imaging lens arrangement 100 satisfies the following conditional formula: (1) 0.1 <F / f3<0.3 (2) 0.2 <F / f5<0.5 (3) -0.7 <F / fg1<-0.01 (4) 0.2 <F / fg2<0.5 (5) 0.1 <F / (f4+f5+f6+f7)<0.2 Wherein, F is the focal length of the optical imaging lens device 100, f3 is the focal length of the third lens L3, f4 is the focal length of the fourth lens L4, f5 is the focal length of the fifth lens L5, f6 is the focal length of the sixth lens L6, f7 is the focal length of the seventh lens L7, fg1 is the combined focal length of the first lens group G1, and fg2 is the combined focal length of the second lens group G2.

[0018] Table 1 below shows optical data of the optical imaging lens device 100 according to the first embodiment of the present invention, including the focal length F (also called effective focal length), aperture value Fno, field of view FOV, radius of curvature R of each lens, distance from each surface to the next surface on the optical axis Z, refractive index Nd of each lens, dispersion, and focal length of each lens, where the focal length, radius of curvature, and distance are all in mm.

[0019] JPEG0007681142000002.jpg145170

[0020] As can be seen from Table 1 above, the optical imaging lens device 100 of the first embodiment has a focal length F=1.40mm, an aperture value Fno=2.00, and a field of view FOV=195.00 degrees, in which the focal length f1 of the first lens L1 is -11.11mm, the focal length f2 of the second lens L2 is -3.11mm, the focal length f3 of the third lens L3 is 10.88mm, the focal length f4 of the fourth lens L4 is 3.60mm, the focal length f5 of the fifth lens L5 is 4.71mm, the focal length f6 of the sixth lens L6 is -2.14mm, the focal length f7 of the seventh lens L7 is 3.60mm, the combined focal length fg1 of the first lens group G1 is -5.02mm, and the combined focal length fg2 of the second lens group G2 is 4.02mm.

[0021] In addition, according to the detailed parameters described above, the specific numerical values ​​of the above conditional equations, i.e., the conditional equation for the ratio between the focal length F of the optical imaging lens device 100 and the focal length f3 of the third lens L3, the conditional equation for the ratio between the focal length F of the optical imaging lens device 100 and the focal length f5 of the fifth lens L5, the conditional equation for the ratio between the focal length F of the optical imaging lens device 100 and the combined focal length fg1 of the first lens group G1, the conditional equation for the ratio between the focal length F of the optical imaging lens device 100 and the combined focal length fg2 of the second lens group G2, and the conditional equation for the ratio between the focal length F of the optical imaging lens device 100 and the combined focal length of the fourth lens L4 to the seventh lens, are as follows in the first embodiment: (1) F / f3 = 0.129 (2) F / f5=0.297 (3) F / fg1=-0.279 (4) F / fg2 = 0.348 (5) F / (f4+f5+f6+f7)=0.14. According to the data in Table 1 above, the combined focal length fg1 of the first lens group G1 in the first embodiment, the combined focal length fg2 of the second lens group G2, the focal length f3 of the third lens L3, and the combined focal lengths of the focal length f5 of the fifth lens L5 and the fourth lens L4 to the seventh lens L7 all satisfy the conditional expressions (1) to (5) of the ratio values ​​set in the optical imaging lens device 100.

[0022] In the first embodiment, the optical imaging lens device 100 satisfies the following conditional expression. (6)0 <F / R1<0.15 (7) 0.35 <F / R2<0.45 (8) 0.735 <F / R4<0.815 (9)-0.65 <F / R11<-0.55 (10)-0.4 <fg1 / (R1+R2+R3+R4+R5+R6+R8+R9+R10+R11+R12+R13+R14+R15)<0 (11)0 <fg2 / (R1+R2+R3+R4+R5+R6+R8+R9+R10+R11+R12+R13+R14+R15)<0.3。

[0023] where F is the focal length of the optical imaging lens device 100, R1 is the radius of curvature of the object-side surface S1 of the first lens L1, R2 is the radius of curvature of the image-side surface S2 of the first lens L1, R3 is the radius of curvature of the object-side surface S3 of the second lens L2, R4 is the radius of curvature of the image-side surface S4 of the second lens L2, R5 is the radius of curvature of the object-side surface S5 of the third lens L3, R6 is the radius of curvature of the image-side surface S6 of the third lens L3, R8 is the radius of curvature of the object-side surface S8 of the fourth lens L4, and R9 is the radius of curvature of the image-side surface S4 of the fourth lens L4. R is the radius of curvature of the object side surface S10 of the fifth lens L5, R11 is the radius of curvature of the image side surface S11 of the fifth lens L5, R12 is the radius of curvature of the object side surface S12 of the sixth lens L6, R13 is the radius of curvature of the image side surface S13 of the sixth lens L6, R14 is the radius of curvature of the object side surface S14 of the seventh lens L7, R15 is the radius of curvature of the image side surface S15 of the seventh lens L7, fg1 is the combined focal length of the first lens group G1, and fg2 is the combined focal length of the second lens group G2.

[0024] According to the detailed parameters in Table 1 above, the above-mentioned conditional expressions, the condition of the ratio value between the focal length F of the optical imaging lens device 100 and the radius of curvature R1 of the object side surface S1 of the first lens L1, the condition of the ratio value between the focal length F of the optical imaging lens device 100 and the radius of curvature R2 of the image side surface S2 of the first lens L1, the condition of the ratio value between the focal length F of the optical imaging lens device 100 and the radius of curvature R4 of the image side surface S4 of the second lens L2, The specific values ​​for the ratio between the focal length F of the imaging lens device 100 and the radius of curvature R11 of the image side surface S11 of the fifth lens L5, the ratio between the combined focal length fg1 of the first lens group G1 and the sum of the radii of curvature of the first lens L1 to the seventh lens L7, and the ratio between the combined focal length fg1 of the second lens group G2 and the sum of the radii of curvature of the first lens L1 to the seventh lens L7 in the first embodiment are as follows: (6) F / R1 = 0.097 (7) F / R2 = 0.363 (8) F / R4=0.742 (9)F / R11=-0.562 (10)fg1 / (R1+R2+R3+R4+R5+R6+R8+R9+R10+R11+R12+R13+R14+R15)=-0.32 (11)fg2 / (R1+R2+R3+R4+R5+R6+R8+R9+R10+R11+R12+R13+R14+R15)=0.26.

[0025] According to the data in Table 1 above, the radius of curvature R1 of the object side surface S1 of the first lens L1 in the first embodiment, the radius of curvature R2 of the image side surface S2 of the first lens L1, the radius of curvature R4 of the image side surface S4 of the second lens L2, the radius of curvature R11 of the image side surface S11 of the fifth lens L5, and the sum of the radii of curvature of the first lens L1 to the seventh lens L7 all satisfy the conditional expressions (6) to (11) set for the optical imaging lens device 100 described above.

[0026] In addition, for the object side surface S3 and the image side surface S4 of the second lens L2 in the first embodiment, the object side surface S5 and the image side surface S6 of the third lens L3, the object side surface S10 and the image side surface S11 of the fifth lens L5, the object side surface S12 and the image side surface S13 of the sixth lens L6, and the object side surface S14 and the image side surface S15 of the seventh lens L7, the contour shape Z of the aspheric surface is determined by the following formula. JPEG0007681142000003.jpg23170Of these, Z is the aspheric surface profile, c is the reciprocal of the radius of curvature, h is half the off-axis height at the surface; k is the conic constant, A4, A6, A8, A10, A12 and A14 are the orders of the coefficients for half the off-axis height h at the surface.

[0027] In the optical imaging lens device 100 according to the first embodiment of the present invention, the conic constant k, and the orders of the coefficients A4, A6, A8, A10, A12 and A14 for each aspheric surface are shown in Table 2 below. JPEG0007681142000004.jpg192170

[0028] Next, the imaging quality of the optical imaging lens device 100 is verified by using optical simulation data. FIG. 1B is a vertical spherical aberration diagram of the first embodiment. From the observation of the diagram, it can be seen that the distance between the curves formed by each wavelength is quite close, and the off-axis light beams with different heights for each wavelength are converged close to the imaging point, so that the chromatic aberration is obviously improved. From the observation of the slope of each curve, it can be seen that the deviation of the imaging point caused by the off-axis light beams with different heights is within the range of ±0.02 mm. Therefore, in the first embodiment, the spherical aberration of different wavelengths is obviously improved.

[0029] Referring to Fig. 1C, it is a lateral spherical aberration (LateralColor) diagram according to the first embodiment of the present invention. As can be seen from the diagram, when the maximum viewing angle is 98.0000 degrees, the generated lateral spherical aberration value is between -5 micrometers and 15 micrometers, and the optical imaging lens device 100 can effectively correct the lateral spherical aberration, and thus obtain a better imaging quality.

[0030] Referring to FIG. 2A, the optical imaging lens device 200 according to the second embodiment of the present invention includes a first lens group G1, an aperture S7, and a second lens group G2 arranged in order from the object side to the image side along the optical axis Z. In the second embodiment, the optical imaging lens device 200 has at least seven lenses. Among them, the first lens group G1 is composed of a first lens L1, a second lens L2, and a third lens L3 arranged along the optical axis Z from the object side to the image side. The second lens group G2 is composed of a fourth lens L4, a fifth lens L5, a sixth lens L6, and a seventh lens L7 arranged along the optical axis Z from the object side to the image side. In this embodiment, there is an air gap distance on the optical axis Z between two adjacent lenses in the first lens L1 to the seventh lens L7. This means that the first lens L1 to the seventh lens L7 are all single lenses, but the two adjacent lenses in the first lens L1 to the seventh lens L7 do not become a compound lens due to the adhesive.

[0031] The first lens L1 has negative refractive power, an object side surface S1 of the first lens L1 is a convex surface, and an image side surface S2 of the first lens L1 is a concave surface, of which the object side surface S1 and the image side surface S2 of the first lens L1 are both spherical surfaces.

[0032] The second lens L2 has negative refractive power, an object side surface S3 of the second lens L2 is a convex surface, an image side surface S4 of the second lens L2 is a concave surface, and among them, the object side surface S3 and the image side surface S4 of the second lens L2 are both aspheric surfaces.

[0033] The third lens L3 is a biconvex lens having a positive refractive power, and the object side surface S5 and the image side surface S6 of the third lens L3 are both aspheric. In a second embodiment, the object side surface S5 of the third lens L3 has at least one inflection point.

[0034] The fourth lens L4 is a biconvex lens having positive refractive power, and both the object side surface S8 and the image side surface S9 of the fourth lens L4 are spherical.

[0035] The fifth lens L5 has positive refractive power, an object side surface S10 of the fifth lens L5 is a concave surface, and an image side surface S11 of the fifth lens L5 is a convex surface, of which the object side surface S10 and the image side surface S11 of the fifth lens L5 are both aspheric surfaces.

[0036] The sixth lens L6 is a biconcave lens having negative refractive power, and both the object side surface S12 and the image side surface S13 of the sixth lens L6 are aspheric.

[0037] The seventh lens L7 is a biconvex lens having positive refractive power, and both the object side surface S14 and the image side surface S15 of the seventh lens L7 are aspheric.

[0038] In addition, the optical imaging lens device 200 further includes an infrared filter L8 and a protective glass L9. The surface of the infrared filter L8 facing the object side forms an object side surface S16, and the surface of the infrared filter L8 facing the image side forms an image side surface S17. The infrared filter L8 is located on one side of the image side surface S15 of the seventh lens L7, and is used to limit the infrared spectrum received by the optical imaging lens device 200, thereby improving the quality and realism of the movie. The surface of the protective glass L9 facing the object side forms an object side surface S18, and the surface of the protective glass L9 facing the image side forms an image side surface S19. The protective glass L9 is installed on one side of the infrared filter L8, and is located between the infrared filter L8 and an image plane Im, and is used to protect the infrared filter L8.

[0039] In order to ensure that the optical imaging lens arrangement 200 according to the present invention has excellent optical performance and high level imaging quality, in the second embodiment, the optical imaging lens arrangement 200 satisfies the following conditional formula: (1) 0.1 <F / f3<0.3 (2) 0.2 <F / f5<0.5 (3) -0.7 <F / fg1<-0.01 (4) 0.2 <F / fg2<0.5 (5) 0.1 <F / (f4+f5+f6+f7)<0.2

[0040] Wherein, F is the focal length of the optical imaging lens device 200, f3 is the focal length of the third lens L3, f4 is the focal length of the fourth lens L4, f5 is the focal length of the fifth lens L5, f6 is the focal length of the sixth lens L6, f7 is the focal length of the seventh lens L7, fg1 is the combined focal length of the first lens group G1, and fg2 is the combined focal length of the second lens group G2.

[0041] Table 3 below shows optical data of the optical imaging lens device 200 according to the second embodiment of the present invention, including the focal length F (also called effective focal length), aperture value Fno, field of view FOV, radius of curvature R of each lens, distance from each surface to the next surface on the optical axis Z, refractive index Nd of each lens, dispersion, and focal length of each lens, of which the focal length and sum of the radii of curvature are in mm.

[0042] JPEG0007681142000005.jpg142170

[0043] As can be seen from Table 3 above, the optical imaging lens device 200 of the second embodiment has a focal length F=1.37mm, an aperture value Fno=2.05, and a field of view FOV=195.00 degrees, of which the focal length f1 of the first lens L1 is -8.48mm, the focal length f2 of the second lens L2 is -2.91mm, the focal length f3 of the third lens L3 is 6.55mm, the focal length f4 of the fourth lens L4 is 3.96mm, the focal length f5 of the fifth lens L5 is 4.06mm, the focal length f6 of the sixth lens L6 is -2.09mm, the focal length f7 of the seventh lens L7 is 3.32mm, the combined focal length fg1 of the first lens group G1 is -7.15, and the combined focal length fg2 of the second lens group G2 is 3.78mm.

[0044] In addition, according to the detailed parameters described above, the specific values ​​of the above conditional equations, i.e., the conditional equation for the ratio between the focal length F of the optical imaging lens device 200 and the focal length f3 of the third lens L3, the conditional equation for the ratio between the focal length F of the optical imaging lens device 200 and the focal length f5 of the fifth lens L5, the conditional equation for the ratio between the focal length F of the optical imaging lens device 200 and the combined focal length fg1 of the first lens group G1, the conditional equation for the ratio between the focal length F of the optical imaging lens device 200 and the combined focal length fg2 of the second lens group G2, and the conditional equation for the ratio between the focal length F of the optical imaging lens device 200 and the combined focal length of the fourth lens L4 to the seventh lens, are as follows in the second embodiment: (1) F / f3 = 0.209 (2) F / f5=0.338 (3) F / fg1=-0.192 (4) F / fg2 = 0.362 (5) F / (f4+f5+f6+f7)=0.15.

[0045] According to the data in Table 3 above, in the second embodiment, the combined focal length fg1 of the first lens group G1, the combined focal length fg2 of the second lens group G2, the focal length f3 of the third lens L3, the focal length f5 of the fifth lens L5, and the combined focal lengths of the fourth lens L4 to the seventh lens L7 all satisfy the conditional expressions (1) to (5) of the ratio values ​​set in the optical imaging lens device 200.

[0046] In the second embodiment, the optical imaging lens device 200 satisfies the following conditional expression. (6)0 <F / R1<0.15 (7) 0.35 <F / R2<0.45 (8) 0.735 <F / R4<0.815 (9)-0.65 <F / R11<-0.55 (10)-0.4 <fg1 / (R1+R2+R3+R4+R5+R6+R8+R9+R10+R11+R12+R13+R14+R15)<0 (11)0 <fg2 / (R1+R2+R3+R4+R5+R6+R8+R9+R10+R11+R12+R13+R14+R15)<0.3。

[0047] where F is the focal length of the optical imaging lens device 200, R1 is the radius of curvature of the object-side surface S1 of the first lens L1, R2 is the radius of curvature of the image-side surface S2 of the first lens L1, R3 is the radius of curvature of the object-side surface S3 of the second lens L2, R4 is the radius of curvature of the image-side surface S4 of the second lens L2, R5 is the radius of curvature of the object-side surface S5 of the third lens L3, R6 is the radius of curvature of the image-side surface S6 of the third lens L3, R8 is the radius of curvature of the object-side surface S8 of the fourth lens L4, and R9 is the radius of curvature of the image-side surface S4 of the fourth lens L4. R is the radius of curvature of the object side surface S10 of the fifth lens L5, R11 is the radius of curvature of the image side surface S11 of the fifth lens L5, R12 is the radius of curvature of the object side surface S12 of the sixth lens L6, R13 is the radius of curvature of the image side surface S13 of the sixth lens L6, R14 is the radius of curvature of the object side surface S14 of the seventh lens L7, R15 is the radius of curvature of the image side surface S15 of the seventh lens L7, fg1 is the combined focal length of the first lens group G1, and fg2 is the combined focal length of the second lens group G2.

[0048] According to the detailed parameters in Table 3 above, the specific values ​​of the above conditional expressions, i.e., the ratio of the focal length F of the optical imaging lens device 200 to the radius of curvature R1 of the object side surface S1 of the first lens L1, the ratio of the focal length F of the optical imaging lens device 200 to the radius of curvature R2 of the image side surface S2 of the first lens L1, the ratio of the focal length F of the optical imaging lens device 200 to the radius of curvature R4 of the image side surface S4 of the second lens L2, the ratio of the focal length F of the optical imaging lens device 200 to the radius of curvature R11 of the image side surface S11 of the fifth lens L5, the ratio of the combined focal length fg1 of the first lens group G1 to the sum of the radii of curvature of the first lens L1 to the seventh lens L7, and the ratio of the combined focal length fg2 of the second lens group G2 to the sum of the radii of curvature of the first lens L1 to the seventh lens L7, are as follows in the second embodiment: (6) F / R1 = 0.111 (7) F / R2 = 0.385 (8)F / R4=0.798 (9)F / R11=-0.597 (10)fg1 / (R1+R2+R3+R4+R5+R6+R8+R9+R10+R11+R12+R13+R14+R15)=-0.11 (11)fg2 / (R1+R2+R3+R4+R5+R6+R8+R9+R10+R11+R12+R13+R14+R15)=0.06.

[0049] According to the data in Table 3 above, in the second embodiment, the radius of curvature R1 of the object side surface S1 of the first lens L1, the radius of curvature R2 of the image side surface S2 of the first lens L1, the radius of curvature R4 of the image side surface S4 of the second lens L2, the radius of curvature R11 of the image side surface S11 of the fifth lens L5, and the sum of the radii of curvature of the first lens L1 to the seventh lens L7 all satisfy the conditional expressions (6) to (11) set for the optical imaging lens device 200.

[0050] In addition, with respect to the object side surface S3 and the image side surface S4 of the second lens L2 in the second embodiment, the object side surface S5 and the image side surface S6 of the third lens L3, the object side surface S10 and the image side surface S11 of the fifth lens L5, the object side surface S12 and the image side surface S13 of the sixth lens L6, and the object side surface S14 and the image side surface S15 of the seventh lens L7, the contour shape Z of the aspheric surface is determined by the following formula. JPEG0007681142000006.jpg24170Of these, Z is the aspheric surface profile, c is the reciprocal of the radius of curvature, h is half the off-axis height at the surface; k is the conic constant, A4, A6, A8, A10, A12 and A14 are the orders of the coefficients for half the off-axis height h at the surface.

[0051] In the optical imaging lens device 200 according to the second embodiment of the present invention, the conic constant k, A4, A6, A8, A10, A12 and A14 of each aspheric surface have the orders of coefficients as shown in Table 4 below. JPEG0007681142000007.jpg192170

[0052] Next, the imaging quality of the optical imaging lens device 200 is verified by using optical simulation data. Figure 2B is a vertical spherical aberration diagram of the second embodiment. From the observation of the diagram, it can be seen that the distance between the curves formed by each wavelength is quite close, and the off-axis light beams with different heights for each wavelength are converged close to the imaging point, so that the chromatic aberration is obviously improved. From the observation of the slope of each curve, it can be seen that the deviation of the imaging point caused by the off-axis light beams with different heights is within the range of ±0.04 mm. Therefore, in the second embodiment, the spherical aberration of different wavelengths is obviously improved.

[0053] Referring to Fig. 2C, this is a lateral color diagram of the second embodiment of the present invention. As can be seen from this diagram, when the maximum viewing angle is 97.5000 degrees, the lateral color value of the generated lateral color is between -2 micrometers and 16 micrometers, and the lateral color can be effectively corrected by the optical imaging lens device 200, and thus a better imaging quality can be obtained.

[0054] Referring to FIG. 3A, the optical imaging lens device 300 according to the third embodiment of the present invention includes a first lens group G1, an aperture S7, and a second lens group G2 arranged in order from the object side to the image side along the optical axis Z. In the third embodiment, the optical imaging lens device 300 has at least seven lenses. Among them, the first lens group G1 is composed of a first lens L1, a second lens L2, and a third lens L3 arranged along the optical axis Z from the object side to the image side. The second lens group G2 is composed of a fourth lens L4, a fifth lens L5, a sixth lens L6, and a seventh lens L7 arranged along the optical axis Z from the object side to the image side. In this embodiment, there is an air gap distance on the optical axis Z between two adjacent lenses in the first lens L1 to the seventh lens L7. This means that the first lens L1 to the seventh lens L7 are all single lenses, but the two adjacent lenses in the first lens L1 to the seventh lens L7 do not become a compound lens due to the adhesive.

[0055] The first lens L1 has negative refractive power, an object side surface S1 of the first lens L1 is a convex surface, and an image side surface S2 of the first lens L1 is a concave surface, of which the object side surface S1 and the image side surface S2 of the first lens L1 are both spherical surfaces.

[0056] The second lens L2 is a biconcave lens having negative refractive power, and the object side surface S3 and the image side surface S4 of the second lens L2 are both aspheric. In a third embodiment, the object side surface S3 of the second lens has at least one inflection point.

[0057] The third lens L3 has positive refractive power, an object side surface S5 of the third lens L3 is a concave surface, and an image side surface S6 of the third lens L3 is a convex surface, of which the object side surface S5 and the image side surface S6 of the third lens L3 are both aspheric surfaces.

[0058] The fourth lens L4 is a biconvex lens having positive refractive power, and both the object side surface S8 and the image side surface S9 of the fourth lens L4 are spherical.

[0059] The fifth lens L5 is a biconvex lens having positive refractive power, and both the object side surface S10 and the image side surface S11 of the fifth lens L5 are aspheric.

[0060] The sixth lens L6 is a biconcave lens having negative refractive power, and both the object side surface S12 and the image side surface S13 of the sixth lens L6 are aspheric.

[0061] The seventh lens L7 is a biconvex lens having positive refractive power, and both the object side surface S14 and the image side surface S15 of the seventh lens L7 are aspheric.

[0062] In addition, the optical imaging lens device 300 further includes an infrared filter L8 and a protective glass L9, in which the surface of the infrared filter L8 facing the object side forms an object side surface S16, and the surface of the infrared filter L8 facing the image side forms an image side surface S17. The infrared filter L8 is located on one side of the image side surface S15 of the seventh lens L7, and is used to limit the infrared spectrum received by the optical imaging lens device 300, thereby improving the quality and realism of the movie. The surface of the protective glass L9 facing the object side forms an object side surface S18, and the surface of the protective glass L9 facing the image side forms an image side surface S19. The protective glass L9 is installed on one side of the infrared filter L8, and is located between the infrared filter L8 and the image plane Im, for protecting the infrared filter L8.

[0063] In order to ensure that the optical imaging lens arrangement 300 according to the present invention has excellent optical performance and high level imaging quality, in the third embodiment, the optical imaging lens arrangement 300 satisfies the following conditional formula: (1) 0.1 <F / f3<0.3 (2) 0.2 <F / f5<0.5 (3) -0.7 <F / fg1<-0.01 (4) 0.2 <F / fg2<0.5 (5) 0.1 <F / (f4+f5+f6+f7)<0.2

[0064] Wherein, F is the focal length of the optical imaging lens device 300, f3 is the focal length of the third lens L3, f4 is the focal length of the fourth lens L4, f5 is the focal length of the fifth lens L5, f6 is the focal length of the sixth lens L6, f7 is the focal length of the seventh lens L7, fg1 is the combined focal length of the first lens group G1, and fg2 is the combined focal length of the second lens group G2.

[0065] Table 5 below shows optical data of the optical imaging lens device 300 according to the third embodiment of the present invention, including the focal length F (also called effective focal length), aperture value Fno, field of view FOV, radius of curvature R of each lens, distance from each surface to the next surface on the optical axis Z, refractive index Nd of each lens, dispersion, and focal length of each lens, where the focal length, radius of curvature, and distance are all in mm.

[0066] JPEG0007681142000008.jpg147170

[0067] As can be seen from Table 5 above, the optical imaging lens device 300 of the third embodiment has a focal length F=1.60mm, an aperture value Fno=2.00, and a field of view FOV=195.00 degrees, in which the focal length f1 of the first lens L1 is -9.05mm, the focal length f2 of the second lens L2 is -3.05mm, the focal length f3 of the third lens L3 is 6.73mm, the focal length f4 of the fourth lens L4 is 4.49mm, the focal length f5 of the fifth lens L5 is 3.97mm, the focal length f6 of the sixth lens L6 is -2.15mm, the focal length f7 of the seventh lens L7 is 3.66mm, the combined focal length fg1 of the first lens group G1 is -6.89mm, and the combined focal length fg2 of the second lens group G2 is 3.88mm.

[0068] Moreover, according to the detailed parameters described above, the conditional expressions of the values of the ratios of the focal length F of the optical imaging lens device 300, which is the above conditional expression, to the focal length f3 of the third lens L3, the conditional expression of the value of the ratio of the focal length F of the optical imaging lens device 300 to the focal length f5 of the fifth lens L5, the conditional expression of the value of the ratio of the focal length F of the optical imaging lens device 300 to the combined focal length fg1 of the first lens group G1, the conditional expression of the value of the ratio of the focal length F of the optical imaging lens device 300 to the combined focal length fg2 of the second lens group G2, and the conditional expression of the value of the ratio of the focal length F of the optical imaging lens device 300 to the combined focal length of the fourth lens L4 to the seventh lens are as follows. The specific numerical values in the third embodiment are as follows. (1) F / f3 = 0.238 (2) F / f5 = 0.403 (3) F / fg1 = -0.232 (4) F / fg2 = 0.412 (5) F / (f4 + f5 + f6 + f7) = 0.16.

[0069] According to the data in Table 5 above, in the third embodiment, the combined focal length fg1 of the first lens group G1, the combined focal length fg2 of the second lens group G2, the focal length f3 of the third lens L3, the focal length f5 of the fifth lens L5, and the combined focal length of the fourth lens L4 to the seventh lens L7 satisfy the conditional expressions of the ratios (1) to (5) set for the above optical imaging lens device 300.

[0070] In addition, in the third embodiment, the optical imaging lens device 300 satisfies the following conditional expressions. (6) 0 < F / R1 < 0.15 (7) 0.35 < F / R2 < 0.45 (8) 0.735 < F / R4 < 0.815 (9) -0.65 < F / R11 < -0.55 (10) -0.4 < fg1 / (R1 + R2 + R3 + R4 + R5 + R6 + R8 + R9 + R10 + R11 + R12 + R13 + R14 + R15) < 0 (11)0 <fg2 / (R1+R2+R3+R4+R5+R6+R8+R9+R10+R11+R12+R13+R14+R15)<0.3。

[0071] where F is the focal length of the optical imaging lens device 300, R1 is the radius of curvature of the object-side surface S1 of the first lens L1, R2 is the radius of curvature of the image-side surface S2 of the first lens L1, R3 is the radius of curvature of the object-side surface S3 of the second lens L2, R4 is the radius of curvature of the image-side surface S4 of the second lens L2, R5 is the radius of curvature of the object-side surface S5 of the third lens L3, R6 is the radius of curvature of the image-side surface S6 of the third lens L3, R8 is the radius of curvature of the object-side surface S8 of the fourth lens L4, and R9 is the radius of curvature of the image-side surface S4 of the fourth lens L4. R is the radius of curvature of the object side surface S10 of the fifth lens L5, R11 is the radius of curvature of the image side surface S11 of the fifth lens L5, R12 is the radius of curvature of the object side surface S12 of the sixth lens L6, R13 is the radius of curvature of the image side surface S13 of the sixth lens L6, R14 is the radius of curvature of the object side surface S14 of the seventh lens L7, R15 is the radius of curvature of the image side surface S15 of the seventh lens L7, fg1 is the combined focal length of the first lens group G1, and fg2 is the combined focal length of the second lens group G2.

[0072] According to the detailed parameters in Table 5 above, the above conditional expressions, the ratio value condition between the focal length F of the optical imaging lens device 300 and the curvature radius R1 of the object side surface S1 of the first lens L1, the ratio value condition between the focal length F of the optical imaging lens device 300 and the curvature radius R2 of the image side surface S2 of the first lens L1, the ratio value condition between the focal length F of the optical imaging lens device 300 and the curvature radius R4 of the image side surface S4 of the second lens L2, In the third embodiment, specific numerical values ​​of the condition for the ratio between the focal length F of the lens device 300 and the radius of curvature R11 of the image side surface S11 of the fifth lens L5, the condition for the ratio between the combined focal length fg1 of the first lens group G1 and the sum of the radii of curvature of the first lens L1 to the seventh lens L7, and the condition for the ratio between the combined focal length fg2 of the second lens group G2 and the sum of the radii of curvature of the first lens L1 to the seventh lens L7 are as follows: (6) F / R1 = 0.141 (7) F / R2 = 0.446 (8) F / R4=0.801 (9)F / R11=-0.646 (10)fg1 / (R1+R2+R3+R4+R5+R6+R8+R9+R10+R11+R12+R13+R14+R15)=-0.01 (11)fg2 / (R1+R2+R3+R4+R5+R6+R8+R9+R10+R11+R12+R13+R14+R15)=0.01.

[0073] According to the data in Table 5 above, in the third embodiment, the radius of curvature R1 of the object side surface S1 of the first lens L1, the radius of curvature R2 of the image side surface S2 of the first lens L1, the radius of curvature R4 of the image side surface S4 of the second lens L2, the radius of curvature R11 of the image side surface S11 of the fifth lens L5, and the sum of the radii of curvature of the first lens L1 to the seventh lens L7 all satisfy the conditional expressions (6) to (11) set for the optical imaging lens device 300.

[0074] In the third embodiment, the object side surface S3 and the image side surface S4 of the second lens L2, the object side surface S5 and the image side surface S6 of the third lens L3, the object side surface S10 and the image side surface S11 of the fifth lens L5, the object side surface S12 and the image side surface S13 of the sixth lens L6, and the object side surface S14 and the image side surface S15 of the seventh lens L7 have aspheric surface contour shapes Z that are determined by the following formula: JPEG0007681142000009.jpg23170Of these, Z is the aspheric surface profile, c is the reciprocal of the radius of curvature, h is half the off-axis height at the surface; k is the conic constant, A4, A6, A8, A10, A12 and A14 are the orders of the coefficients for half the off-axis height h at the surface.

[0075] In the optical imaging lens device 300 according to the third embodiment of the present invention, the orders of the coefficients for the conic constant k, A4, A6, A8, A10, A12 and A14 in each aspheric surface are shown in Table 6 below. JPEG0007681142000010.jpg191170

[0076] Next, the imaging quality of the optical imaging lens device 300 is verified by using optical simulation data. FIG. 3B is a vertical spherical aberration diagram of the third embodiment. From the diagram, it can be seen that the distance between the curves formed by each wavelength is quite close, and the off-axis light beams with different heights for each wavelength are converged close to the imaging point, so that the chromatic aberration is obviously improved. From the slope of each curve, it can be seen that the deviation of the imaging point caused by the off-axis light beams with different heights is within the range of ±0.05 mm. Therefore, in the third embodiment, the spherical aberration of different wavelengths is obviously improved.

[0077] Referring to Fig. 3C, it is a lateral color diagram of the third embodiment of the present invention. As can be seen from the diagram, when the maximum viewing angle is 97.5000 degrees, the lateral color value of the generated lateral color is between -2 micrometers and 9 micrometers, and the optical imaging lens device 300 can effectively correct the lateral color, and thus obtain a better imaging quality.

[0078] The above are merely preferred embodiments of the present invention, and it should be noted that the data in the above table does not limit the present invention, and any person skilled in the art can appropriately change these parameters and settings after reading this application without departing from the scope of the present application. Any equivalent replacement made based on the specification and claims of the present invention is included in the patent scope of the present invention. [Explanation of symbols]

[0079] 100, 200, 300 Optical imaging lens device G1 First lens group G2 Second lens group L1 First lens L2 Second lens L3 Third lens L4 Fourth lens L5 Fifth lens L6 Sixth lens L7 Seventh lens L8 Infrared Filter L9 Protective glass Im Image plane S7 Aperture Z optical axis S1, S3, S5, S8, S10, S12, S14, S16, S18 Object side S2, S4, S6, S9, S11, S13, S15, S17, S19 Image side

Claims

1. Along the optical axis, from the object side to the image side, the lens is composed of a first lens, a second lens, and a third lens arranged along the optical axis from the object side to the image side, the first lens has negative refractive power, an object side surface of the first lens is a convex surface, and an image side surface of the first lens is a concave surface, the second lens has negative refractive power, and an image side surface of the second lens is a concave surface, a first lens group in which the third lens has positive refractive power, and an image side surface of the third lens is a convex surface; An aperture; a fourth lens, a fifth lens, a sixth lens, and a seventh lens arranged along the optical axis from the object side to the image side, the fourth lens is a biconvex lens having positive refractive power, the fifth lens has positive refractive power, and an image side surface of the fifth lens is a convex surface, the sixth lens is a biconcave lens having negative refractive power, the seventh lens is a biconvex lens having positive refractive power, a second lens group having an air gap distance on the optical axis between each two adjacent lenses from the first lens to the seventh lens; The optical imaging lens system satisfies the condition 0.2<F / fg2<0.5, where F is the focal length of the optical imaging lens system, and fg2 is the combined focal length of the second lens group; 13. An optical imaging lens device, comprising: at least one of an object side surface of said third lens and an object side surface of said fifth lens, said object side surface being concave.

2. 2. The optical imaging lens device of claim 1, wherein the object side surface of the second lens is a convex surface, and the object side surface of the third lens is a concave surface.

3. 2. The optical imaging lens device of claim 1, wherein the second lens is a biconcave lens having at least one inflection point on an object-side surface of the second lens.

4. The optical imaging lens according to claim 1, wherein, of the object side surface of the third lens and the object side surface of the fifth lens, only the object side surface of the fifth lens is concave, 1. An optical imaging lens device, wherein the third lens is a biconvex lens and has at least one inflection point on an object side surface of the third lens.

5. The optical imaging lens according to claim 1, wherein, of the object-side surface of the third lens and the object-side surface of the fifth lens, only the object-side surface of the third lens is concave, 11. An optical imaging lens arrangement, wherein the fifth lens is a biconvex lens.

6. 2. The optical imaging lens device of claim 1, wherein the optical imaging lens device satisfies the condition 0.1<F / f3<0.3, where F is the focal length of the optical imaging lens device and f3 is the focal length of the third lens.

7. 2. The optical imaging lens arrangement of claim 1, wherein the optical imaging lens arrangement satisfies the condition 0.2<F / f5<0.5, where F is the focal length of the optical imaging lens arrangement and f5 is the focal length of the fifth lens.

8. 2. The optical imaging lens device of claim 1, wherein the optical imaging lens device satisfies the condition 0.1<F / (f4+f5+f6+f7)<0.2, where F is the focal length of the optical imaging lens device, f4 is the focal length of the fourth lens, f5 is the focal length of the fifth lens, f6 is the focal length of the sixth lens, and f7 is the focal length of the seventh lens.

9. 2. The optical imaging lens device of claim 1, wherein the optical imaging lens device satisfies the condition 0<F / R1<0.15, where F is the focal length of the optical imaging lens device and R1 is the radius of curvature of the object-side surface of the first lens.

10. 2. The optical imaging lens device of claim 1, wherein the optical imaging lens device satisfies the condition 0.35<F / R2<0.45, where F is the focal length of the optical imaging lens device and R2 is the radius of curvature of the image-side surface of the first lens.

11. 2. The optical imaging lens device of claim 1, wherein the optical imaging lens device satisfies the condition 0.74<F / R4<0.82, where F is the focal length of the optical imaging lens device and R4 is the radius of curvature of the image-side surface of the second lens.

12. 2. The optical imaging lens device of claim 1, wherein the optical imaging lens device satisfies the condition -0.65<F / R11<-0.55, where F is the focal length of the optical imaging lens device and R11 is the radius of curvature of the image-side surface of the fifth lens.

13. The optical imaging lens device satisfies the condition: -0.4<fg1 / (R1+R2+R3+R4+R5+R6+R8+R9+R10+R11+R12+R13+R14+R15)<0, where fg1 is the combined focal length of the first lens group, R1 is the radius of curvature of the object-side surface of the first lens, R2 is the radius of curvature of the image-side surface of the first lens, R3 is the radius of curvature of the object-side surface of the second lens, R4 is the radius of curvature of the image-side surface of the second lens, R5 is the radius of curvature of the object-side surface of the third lens, R6 is the radius of curvature of the object-side surface of the third lens, R7 is the radius of curvature of the object-side surface of the third lens, R8 is the radius of curvature of the object-side surface of the third lens, R9 is the radius of curvature of the object-side surface of the third lens, R10 is the radius of curvature of the object-side surface of the first lens, R11 is the radius of curvature of the image-side surface of the second lens, R12 is the radius of curvature of the object-side surface of the third lens, R13 is the radius of curvature of the image-side surface of the third lens, R14 is the radius of curvature of the object-side surface of the third lens, R15 is the radius of curvature of the object-side surface of the third lens, R16 is the radius of curvature of the 2. The optical imaging lens apparatus of claim 1, wherein R is a radius of curvature of the image side surface of the fourth lens, R8 is a radius of curvature of the object side surface of the fourth lens, R9 is a radius of curvature of the image side surface of the fourth lens, R10 is a radius of curvature of the object side surface of the fifth lens, R11 is a radius of curvature of the image side surface of the fifth lens, R12 is a radius of curvature of the image side surface of the sixth lens, R13 is a radius of curvature of the image side surface of the sixth lens, R14 is a radius of curvature of the object side surface of the seventh lens, and R15 is a radius of curvature of the image side surface of the seventh lens.

14. The optical imaging lens device satisfies the condition: 0<fg2 / (R1+R2+R3+R4+R5+R6+R8+R9+R10+R11+R12+R13+R14+R15)<0.3, where fg2 is the combined focal length of the second lens group, R1 is the radius of curvature of the object-side surface of the first lens, R2 is the radius of curvature of the image-side surface of the first lens, R3 is the radius of curvature of the object-side surface of the second lens, R4 is the radius of curvature of the image-side surface of the second lens, R5 is the radius of curvature of the object-side surface of the third lens, and R6 is the radius of curvature of the object-side surface of the third lens.

2. The optical imaging lens device of claim 1, wherein R is the radius of curvature of the image side surface of the fourth lens, R8 is the radius of curvature of the object side surface of the fourth lens, R9 is the radius of curvature of the image side surface of the fourth lens, R10 is the radius of curvature of the object side surface of the fifth lens, R11 is the radius of curvature of the image side surface of the fifth lens, R12 is the radius of curvature of the image side surface of the sixth lens, R13 is the radius of curvature of the image side surface of the sixth lens, R14 is the radius of curvature of the object side surface of the seventh lens, and R15 is the radius of curvature of the image side surface of the seventh lens.

15. 2. The optical imaging lens device of claim 1, wherein both the object side and image side surfaces of the second lens are aspheric.

16. 2. The optical imaging lens device of claim 1, wherein both the object side surface and the image side surface of the third lens are aspheric.

17. 2. The optical imaging lens device according to claim 1, wherein the fifth lens has both an object side surface and an image side surface that are aspheric.

18. 2. The optical imaging lens device according to claim 1, wherein both the object side surface and the image side surface of the sixth lens are aspheric.

19. 2. The optical imaging lens device of claim 1, wherein the seventh lens has an object side surface and an image side surface that are both aspheric.

Images