Optical imaging lens device

Abstract

To provide an optical imaging lens device having the advantages of excellent imaging quality.SOLUTION: An optical imaging lens device includes, in order from an object side to an image side along an optical axis, a first lens assembly, an aperture, and a second lens assembly. The first lens assembly is composed of a first lens, a second lens, and a third lens arranged in order from the object side to the image side along the optical axis, the first to third lenses having refractive powers arranged in order of negative, negative, and positive. The second lens assembly is composed of a fourth lens, a fifth lens, a sixth lens, and a seventh lens arranged in order from the object side to the image side along the optical axis, the fourth to seventh lenses having refractive powers arranged in order of positive, positive, negative, and positive. By arranging the refractive powers of the optical imaging lens device so as to satisfy specific conditions according to the above technical features, excellent imaging quality can be achieved.SELECTED DRAWING: Figure 1A

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, the popularity of portable electronic devices with photography capabilities has led to growing demand for optical systems. Typical optical systems use charge-coupled devices (CCDs) and complementary metal-oxide semiconductor (CMOS) sensors. As semiconductor manufacturing technology advances, the pixel size of photosensitive elements has become smaller, leading to the development of optical systems with increasingly higher resolution. Furthermore, with the rapid development of unmanned aerial vehicles and self-driving cars, advanced driver assistance systems (ADAS) are playing an essential role in vehicle safety. These systems utilize sensors attached to various lens devices to collect real-time environmental information and provide comprehensive information to the driver. Furthermore, as the temperature of vehicle lenses changes, the quality of lens devices must adapt to changing external environmental conditions, resulting in increased demands for imaging quality.

[0003] Generally, a good imaging lens system has advantages such as low distortion and high resolution. However, in practical applications, factors such as small size and cost must also be considered. Therefore, designing a lens system with good imaging quality despite various constraints is one of the difficult problems for designers. Summary of the Invention [Means for solving the problem]

[0004] In view of this, the present invention aims to provide an optical imaging lens arrangement with the advantage of excellent imaging quality.

[0005] To achieve the above object, the present invention provides an optical imaging lens device that includes, in order from the object side to the image side along an optical axis, a first lens group, an aperture, and a second lens group. The first lens group is composed of a first lens, a second lens, and a third lens that are arranged along the optical axis from the object side to the image side. The first lens has negative refractive power, and the object-side surface of the first lens is concave, and the image-side surface of the first lens is convex. The second lens has negative refractive power. The third lens has positive refractive power. The second lens group is composed of a fourth lens, a fifth lens, a sixth lens, and a seventh lens that are arranged along the optical axis from the object side to the image side. The fourth lens has positive refractive power. The fifth lens has positive refractive power. The sixth lens has negative refractive power. The seventh lens has positive refractive power.

[0006] The present invention also provides an optical imaging lens device comprising, in order from the object side to the image side along an optical axis, a first lens group, an aperture, and a second lens group. The first lens group comprises 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, and the object-side surface of the first lens is concave, and the image-side surface of the first lens is convex. The image-side surface of the second lens and the object-side surface of the third lens are adhesively bonded to form a compound lens having positive refractive power. The second lens group comprises 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 has positive refractive power. The image-side surface of the fifth lens and the object-side surface of the sixth lens are adhesively bonded to form a compound lens having negative refractive power. The seventh lens has positive refractive power. [Effects of the Invention]

[0007] The advantage of the present invention is that the optical imaging lens device can achieve excellent imaging quality by arranging at least seven lenses as optical means and accurately arranging the refractive power of the optical imaging lens device to meet specific conditions. [Brief explanation of the drawings]

[0008] [Figure 1A] 1 is a schematic diagram illustrating the configuration of an optical imaging lens device according to a first embodiment of the present invention. [Figure 1B] 3 is a diagram showing the spherical aberration in the vertical direction of the optical imaging lens device according to the first embodiment of the present invention. FIG. [Figure 1C] 3 is a horizontal color difference diagram of the optical imaging lens device according to the first embodiment of the present invention; FIG. [Figure 2A] FIG. 10 is a schematic diagram illustrating the configuration of an optical imaging lens device according to a second embodiment of the present invention. [Figure 2B] FIG. 10 is a diagram illustrating the spherical aberration in the vertical direction of the optical imaging lens device according to the second embodiment of the present invention. [Figure 2C] FIG. 6 is a lateral color difference diagram of the optical imaging lens device according to the second embodiment of the present invention. [Figure 3A] FIG. 10 is a schematic diagram illustrating the configuration of an optical imaging lens device according to a third embodiment of the present invention. [Figure 3B] FIG. 10 is a diagram illustrating the spherical aberration in the vertical direction of the optical imaging lens device according to the third embodiment of the present invention. [Figure 3C] FIG. 10 is a horizontal color difference diagram of the optical imaging lens device according to the third embodiment of the present invention. DETAILED DESCRIPTION OF THE INVENTION

[0009] To more clearly explain the present invention, preferred embodiments will be described in detail below with reference to the drawings. Referring to FIG. 1A, an optical imaging lens apparatus 100 according to a first embodiment of the present invention includes a first lens group G1, an aperture S6, and a second lens group G2, arranged in this order from the object side to the image side along an optical axis Z. In the first embodiment, the optical imaging lens apparatus 100 includes at least seven lenses. The first lens group G1 includes 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 includes 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.

[0010] The first lens L1 has negative refractive power, and the object side surface S1 of the first lens L1 is concave, and the image side surface S2 of the first lens L1 is convex, of which the object side surface S1 and the image side surface S2 of the first lens L1 are both aspherical.

[0011] The second lens L2 has negative refractive power, and the object-side surface S3 of the second lens L2 is a convex surface, and the image-side surface S4 of the second lens L2 is a concave surface, of which the object-side surface S3 and the image-side surface S4 of the second lens L2 are both spherical.

[0012] The third lens L3 is a biconvex lens having positive refractive power, and both the object-side surface S4 and the image-side surface S5 of the third lens L3 are spherical. In the first embodiment, the object-side surface S4 of the third lens L3 is bonded to the image-side surface S4 of the second lens L2, so that the second lens L2 and the third lens L3 are combined as a compound lens having positive refractive power.

[0013] The fourth lens L4 is a biconvex lens having positive refractive power, and both the object side surface S7 and the image side surface S8 of the fourth lens L4 are spherical.

[0014] The fifth lens L5 is a biconvex lens having positive refractive power, and both the object-side surface S9 and the image-side surface S10 of the fifth lens L5 are spherical.

[0015] The sixth lens L6 is a biconcave lens having negative refractive power, wherein the object-side surface S10 of the sixth lens L6 is spherical and the image-side surface S11 of the sixth lens L6 is aspherical. In the first embodiment, the object-side surface S10 of the sixth lens L6 is bonded to the image-side surface S10 of the fifth lens L5, and the fifth lens L5 and the sixth lens L6 are combined as a compound lens having negative refractive power.

[0016] The seventh lens L7 has positive refractive power, and the object side surface S12 of the seventh lens L7 is a convex surface, and the image side surface S13 of the seventh lens L7 is a concave surface, of which the object side surface S12 of the seventh lens L7 is aspherical, and the image side surface S13 of the seventh lens L7 is spherical.

[0017] The optical imaging lens device 100 further includes an infrared filter L8 and a protective glass L9. The surface of the infrared filter L8 facing the object side forms the object-side surface S14, and the surface facing the image side forms the image-side surface S15. The infrared filter L8 is located on one side of the image-side surface S13 of the seventh lens L7 and limits the spectrum of infrared light received by the optical imaging lens device 100 to improve the quality and realism of the image. The surface of the protective glass L9 facing the object side forms the object-side surface S16, and the surface facing the image side forms the image-side surface S17. The protective glass L9 is located on one side of the infrared filter L8 and is between the infrared filter L8 and the image plane Im to protect the infrared filter L8.

[0018] To ensure that the optical imaging lens device 100 of the present invention can maintain excellent optical performance and high level imaging quality, in a first embodiment, the optical imaging lens device 100 satisfies the following conditional formula: (1)-0.459 <F / f1<-0.435 (2)-0.385 <F / f2<-0.362 (3) 1,000 <F / f3<1.200 (4) 0.600 <F / f4<0.800 (5) 1.155 <F / f5<1.205 (6)-2.523 <F / f6<-2.412 (7)0.249 <F / f7<0.286 (8)0.455 <F / fg1<0.471 (9)0.335 <F / fg2<0.367。

[0019] Wherein, F is the focal length of the optical imaging lens device 100, f1 is the focal length of the first lens L1, f2 is the focal length of the second lens L2, 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.

[0020] Table 1 below lists the optical data of the optical imaging lens device 100 according to the first embodiment of the present invention, including the focal length F (also referred to as the 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 along 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. Table 1: Optical data table of the optical imaging lens device in the first embodiment JPEG2025121809000002.jpg120170

[0021] As can be seen from Table 1 above, in the optical imaging lens device 100 according to the first embodiment, the focal length F=15.21 mm, the aperture value Fno=1.67, and the field of view FOV=34.78 degrees, of which the focal length f1 of the first lens L1=-33.469 mm, the focal length f2 of the second lens L2=-40.744 mm, the focal length f3 of the third lens L3=14.008 mm, the focal length f4 of the fourth lens L4=21.949 mm, the focal length f5 of the fifth lens L5=12.874 mm, and The focal length of the sixth lens L6 is f6 = -6.141 mm, the focal length of the seventh lens L7 is f7 = 54.329 mm, the adhesive focal length of the compound lens formed by adhesively bonding the second lens L2 and the third lens L3 is f23 = 20.466 mm, the adhesive focal length of the compound lens formed by adhesively bonding the fifth lens L5 and the sixth lens L6 is f56 = -18.386 mm, the combined focal length of the first lens group G1 is fg1 = 33.246 mm, and the combined focal length of the second lens group G2 is fg2 = 42.045 mm.

[0022] Based on the above detailed parameters, the detailed values of the conditional expressions in the first embodiment are as follows: (1) F / f1=-0.455 (2) F / f2 = -0.373 (3) F / f3=1.086 (4) F / f4=0.693 (5) F / f5=1.182 (6) F / f6=-2.478 (7) F / f7=0.280 (8) F / fg1=0.458 (9)F / fg2=0.359.

[0023] From the data in Table 1 above, it can be seen that the focal length of each lens in the first embodiment, the combined focal length fg1 of the first lens group G1, and the combined focal length fg2 of the second lens group G2 all satisfy the proportional value conditional expressions (1) to (9) set in the optical imaging lens device 100.

[0024] In the first embodiment, the optical imaging lens device 100 satisfies the following conditional expression. (10)0.900 <F / R9<1.100 (11) 2,500 <F / R11<2.700 (12)0.104 <fg1 / (R1+R2+R3+R4+R5+R7+R8+R9+R10+R11+R12+R13) <0.115 (13)0.141 <fg2 / (R1+R2+R3+R4+R5+R7+R8+R9+R10+R11+R12+R13) < 0.148 (14)0.048 <F / (R1+R2+R3+R4+R5+R7+R8+R9+R10+R11+R12+R13) <0.053。

[0025] 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 that is attached to the object-side surface S4 of the third lens L3, R5 is the radius of curvature of the image-side surface S5 of the third lens L3, R7 is the radius of curvature of the object-side surface S7 of the fourth lens L4, and R8 is the radius of curvature of the image-side surface S4 of the fourth lens L4. R is the radius of curvature of the side surface S8, R9 is the radius of curvature of the object-side surface S9 of the fifth lens L5, R10 is the radius of curvature of the image-side surface S10 of the fifth lens L5 correspondingly adhered to the object-side surface S10 of the sixth lens L6, R11 is the radius of curvature of the image-side surface S11 of the sixth lens L6, R12 is the radius of curvature of the object-side surface S12 of the seventh lens L7, R13 is the radius of curvature of the image-side surface S13 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.

[0026] Based on the detailed parameters in Table 1 above, the detailed values for the conditional expressions (10) to (14) in the first embodiment are as follows: (10)F / R9=0.987 (11)F / R11=2.647 (12)fg1 / (R1+R2+R3+R4+R5+R7+R8+R9+R10+R11+R12+R13)=0.113 (13)fg2 / (R1+R2+R3+R4+R5+R7+R8+R9+R10+R11+R12+R13) =0.145 (14)F / (R1+R2+R3+R4+R5+R7+R8+R9+R10+R11+R12+R13)=0.052.

[0027] From the data in Table 1 above, it can be seen that the respective related values in the first embodiment all satisfy the conditional expressions (10) to (14) set for the optical imaging lens device 100.

[0028] Regarding the aspherical surfaces of the object-side surface S1 and the image-side surface S2 of the first lens L1 in the first example, the image-side surface S11 of the sixth lens L6, and the object-side surface S12 of the seventh lens L7, the contour shape Z can be obtained by the following formula: JPEG2025121809000003.jpg20157Of these, Z is the surface profile of the aspheric surface, c is the reciprocal of the radius of curvature, h is half the off-axis height of the surface, k is the conic constant, A4, A6, A8, A10, A12, A14 and A16 are the orders of the coefficients for half the off-axis height h at the surface.

[0029] 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, A14 and A16 for each aspheric surface are shown in Table 2 below. Table 2: Conic coefficient table for each aspherical surface according to the first embodiment JPEG2025121809000004.jpg82170

[0030] Next, the imaging quality of the optical imaging lens device 100 will be verified based on optical simulation data. FIG. 1B shows the vertical spherical aberration diagram for the first embodiment. Observing this diagram, the curves formed by each wavelength are quite close to each other. This is because the off-axis light rays from each wavelength at different heights converge at a close focal point, resulting in a clear improvement in chromatic aberration. Observing the diagonal width of each curve reveals that the deviation of the focal point for off-axis light rays at different heights can be kept within the range of -0.01 mm to 0.07 mm. Therefore, the first embodiment clearly improves spherical aberration for different wavelengths.

[0031] 1C is a diagram of the horizontal spherical aberration of the first embodiment of the present invention. As can be seen from the diagram, the horizontal aberrations of the shortest and longest wavelengths incident on the imaging plane are both less than 3.5 micrometers. Therefore, the optical imaging lens device 100 has low horizontal spherical aberration, and the positions of light rays with different wavelengths tend to coincide on the imaging plane, thereby improving the color standard and imaging quality of the image.

[0032] 2A , an optical imaging lens apparatus 200 according to a second embodiment of the present invention includes, in order from the object side to the image side along the optical axis Z, a first lens group G1, an aperture S6, and a second lens group G2. In the second embodiment, the optical imaging lens apparatus 200 includes at least seven lenses. The first lens group G1 includes a first lens L1, a second lens L2, and a third lens L3, which are arranged along the optical axis Z from the object side to the image side. The second lens group G2 includes a fourth lens L4, a fifth lens L5, a sixth lens L6, and a seventh lens L7, which are arranged along the optical axis Z from the object side to the image side.

[0033] The first lens L1 has negative refractive power, and the object side surface S1 of the first lens L1 is concave, and the image side surface S2 of the first lens L1 is convex, of which the object side surface S1 and the image side surface S2 of the first lens L1 are both aspherical.

[0034] The second lens L2 has negative refractive power, and the object-side surface S3 of the second lens L2 is a convex surface, and the image-side surface S4 of the second lens L2 is a concave surface, of which the object-side surface S3 and the image-side surface S4 of the second lens L2 are both spherical.

[0035] The third lens L3 is a biconvex lens having positive refractive power, and both the object-side surface S4 and the image-side surface S5 of the third lens L3 are spherical. In the second embodiment, the object-side surface S4 of the third lens L3 is bonded to the image-side surface S4 of the second lens L2, so that the second lens L2 and the third lens L3 are combined as a compound lens having positive refractive power.

[0036] The fourth lens L4 is a biconvex lens having positive refractive power, and both the object-side surface S7 and the image-side surface S8 of the fourth lens L4 are spherical.

[0037] The fifth lens L5 is a biconvex lens having positive refractive power, and both the object-side surface S9 and the image-side surface S10 of the fifth lens L5 are spherical.

[0038] The sixth lens L6 is a biconcave lens having negative refractive power, wherein the object-side surface S10 of the sixth lens L6 is spherical and the image-side surface S11 of the sixth lens L6 is aspherical. In the second embodiment, the object-side surface S10 of the sixth lens L6 is bonded to the image-side surface S10 of the fifth lens L5, and the fifth lens L5 and the sixth lens L6 are combined as a compound lens having negative refractive power.

[0039] The seventh lens L7 has positive refractive power, and the object side surface S12 of the seventh lens L7 is a convex surface, and the image side surface S13 of the seventh lens L7 is a concave surface, of which the object side surface S12 of the seventh lens L7 is aspherical, and the image side surface S13 of the seventh lens L7 is spherical.

[0040] 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 S14, and the surface facing the image side forms an image-side surface S15. The infrared filter L8 is located on one side of the image-side surface S13 of the seventh lens L7 and limits the infrared spectrum received by the optical imaging lens device 200 to improve the quality and realism of the image. The surface of the protective glass L9 facing the object side forms an object-side surface S16, and the surface facing the image side forms an image-side surface S17. The protective glass L9 is located on one side of the infrared filter L8 and is between the infrared filter L8 and the image plane Im to protect the infrared filter L8.

[0041] To ensure that the optical imaging lens device 200 of the present invention can maintain excellent optical performance and high level imaging quality, in the second embodiment, the optical imaging lens device 200 satisfies the following conditional formula: (1)-0.459 <F / f1<-0.435 (2)-0.385 <F / f2<-0.362 (3) 1,000 <F / f3<1.200 (4) 0.600 <F / f4<0.800 (5) 1.155 <F / f5<1.205 (6)-2.523 <F / f6<-2.412 (7)0.249 <F / f7<0.286 (8)0.455 <F / fg1<0.471 (9)0.335 <F / fg2<0.367。

[0042] Wherein, F is the focal length of the optical imaging lens device 200, f1 is the focal length of the first lens L1, f2 is the focal length of the second lens L2, 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.

[0043] Table 3 below lists the optical data of the optical imaging lens device 200 according to the second embodiment of the present invention, including the focal length F (also referred to as the 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 along 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. Table 3: Optical data table of the optical imaging lens device in the second embodiment JPEG2025121809000005.jpg121170

[0044] As can be seen from Table 3 above, in the optical imaging lens device 200 according to the second embodiment, the focal length F=14.84 mm, the aperture value Fno=1.62, and the field of view FOV=35.89 degrees, of which the focal length f1 of the first lens L1=-34.051 mm, the focal length f2 of the second lens L2=-40.895 mm, the focal length f3 of the third lens L3=14.000 mm, the focal length f4 of the fourth lens L4=21.876 mm, the focal length f5 of the fifth lens L5=12.833 mm, and The focal length of the sixth lens L6 is f6 = -6.150 mm, the focal length of the seventh lens L7 is f7 = 52.136 mm, the adhesive focal length of the compound lens formed by adhesively bonding the second lens L2 and the third lens L3 is f23 = 20.417 mm, the adhesive focal length of the compound lens formed by adhesively bonding the fifth lens L5 and the sixth lens L6 is f56 = -18.553 mm, the combined focal length of the first lens group G1 is fg1 = 32.576 mm, and the combined focal length of the second lens group G2 is fg2 = 40.551 mm.

[0045] Based on the above detailed parameters, the detailed values of the conditional expressions in the second embodiment are as follows: (1) F / f1=-0.436 (2) F / f2=-0.363 (3) F / f3=1.060 (4) F / f4=0.678 (5) F / f5=1.156 (6) F / f6=-2.413 (7) F / f7=0.285 (8) F / fg1=0.456 (9)F / fg2=0.366.

[0046] From the data in Table 3 above, it can be seen that the focal lengths of the lenses in the second embodiment, the combined focal length fg1 of the first lens group G1, and the combined focal length fg2 of the second lens group G2 all satisfy the proportional value conditional expressions (1) to (9) set in the optical imaging lens device 200.

[0047] In the second embodiment, the optical imaging lens device 200 satisfies the following conditional expression. (10)0.900 <F / R9<1.100 (11) 2,500 <F / R11<2.700 (12)0.104 <fg1 / (R1+R2+R3+R4+R5+R7+R8+R9+R10+R11+R12+R13) <0.115 (13)0.141 <fg2 / (R1+R2+R3+R4+R5+R7+R8+R9+R10+R11+R12+R13) < 0.148 (14)0.048 <F / (R1+R2+R3+R4+R5 +R7+R8+R9+R10+R11+R12+R13) <0.053。

[0048] 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 that is attached to the object-side surface S4 of the third lens L3, R5 is the radius of curvature of the image-side surface S5 of the third lens L3, R7 is the radius of curvature of the object-side surface S7 of the fourth lens L4, and R8 is the radius of curvature of the image-side surface S4 of the fourth lens L4. R is the radius of curvature of the side surface S8, R9 is the radius of curvature of the object-side surface S9 of the fifth lens L5, R10 is the radius of curvature of the image-side surface S10 of the fifth lens L5 correspondingly adhered to the object-side surface S10 of the sixth lens L6, R11 is the radius of curvature of the image-side surface S11 of the sixth lens L6, R12 is the radius of curvature of the object-side surface S12 of the seventh lens L7, R13 is the radius of curvature of the image-side surface S13 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.

[0049] Based on the detailed parameters in Table 3 above, the detailed values for the conditional expressions (10) to (14) in the second embodiment are as follows: (10)F / R9=0.965 (11)F / R11=2.573 (12)fg1 / (R1+R2+R3+R4+R5+R7+R8+R9+R10+R11+R12+R13)=0.114 (13)fg2 / (R1+R2+R3+R4+R5+R7+R8+R9+R10+R11+R12+R13) =0.142 (14)F / (R1+R2+R3+R4+R5+R7+R8+R9+R10+R11+R12+R13)=0.052.

[0050] From the data in Table 3 above, it can be seen that the respective related values in the second embodiment all satisfy the conditional expressions (10) to (14) set for the optical imaging lens device 200.

[0051] Regarding the aspheric surfaces of the object-side surface S1 and the image-side surface S2 of the first lens L1, the image-side surface S11 of the sixth lens L6, and the object-side surface S12 of the seventh lens L7 in the second example, the contour shape Z is obtained by the following formula: JPEG2025121809000006.jpg18153Of these, Z is the surface profile of the aspheric surface, c is the reciprocal of the radius of curvature, h is half the off-axis height of the surface, k is the conic constant, A4, A6, A8, A10, A12, A14 and A16 are the orders of the coefficients for half the off-axis height h at the surface.

[0052] In the optical imaging lens device 200 according to the second embodiment of the present invention, the conic constant k and the orders of the coefficients A4, A6, A8, A10, A12, A14 and A16 for each aspheric surface are shown in Table 4 below. Table 4: Conic coefficient table for each aspherical surface according to the second embodiment JPEG2025121809000007.jpg78170

[0053] Next, the imaging quality of the optical imaging lens device 200 will be verified based on optical simulation data. FIG. 2B shows the vertical spherical aberration diagram for the second embodiment. Observing this diagram, the curves formed by each wavelength are quite close to each other. This is because the off-axis light rays from each wavelength with different heights converge at a close focal point, resulting in a clear improvement in chromatic aberration. Observing the diagonal width of each curve, it can be seen that the deviation of the focal point for off-axis light rays with different heights can be kept within the range of -0.01 mm to 0.05 mm. Therefore, the second embodiment clearly improves spherical aberration for different wavelengths.

[0054] 2C is a diagram showing the lateral spherical aberration of the second embodiment of the present invention. Observing this diagram, it can be seen that the lateral aberrations of the shortest and longest wavelengths incident on the imaging plane are both less than 2.5 micrometers. Therefore, the optical imaging lens device 200 has low lateral spherical aberration, which tends to align the positions of light rays with different wavelengths on the imaging plane, thereby improving the color accuracy and imaging quality of the image.

[0055] 3A, an optical imaging lens apparatus 300 according to a third embodiment of the present invention includes a first lens group G1, an aperture S6, and a second lens group G2, arranged in this order from the object side to the image side along the optical axis Z. In the third embodiment, the optical imaging lens apparatus 300 includes at least seven lenses, of which the first lens group G1 includes 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, and the second lens group G2 includes 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.

[0056] The first lens L1 has negative refractive power, and the object-side surface S1 of the first lens L1 is concave, and the image-side surface S2 of the first lens L1 is convex, of which the object-side surface S1 and the image-side surface S2 of the first lens L1 are both aspherical.

[0057] The second lens L2 has negative refractive power, and the object-side surface S3 of the second lens L2 is a convex surface, and the image-side surface S4 of the second lens L2 is a concave surface, of which the object-side surface S3 and the image-side surface S4 of the second lens L2 are both spherical.

[0058] The third lens L3 is a biconvex lens having positive refractive power, and both the object-side surface S4 and the image-side surface S5 of the third lens L3 are spherical. In the third embodiment, the object-side surface S4 of the third lens L3 is bonded to the image-side surface S4 of the second lens L2, so that the second lens L2 and the third lens L3 are combined as a compound lens having positive refractive power.

[0059] The fourth lens L4 is a biconvex lens having positive refractive power, and both the object-side surface S7 and the image-side surface S8 of the fourth lens L4 are spherical.

[0060] The fifth lens L5 is a biconvex lens having positive refractive power, and both the object-side surface S9 and the image-side surface S10 of the fifth lens L5 are spherical.

[0061] The sixth lens L6 is a biconcave lens having negative refractive power, wherein the object-side surface S10 of the sixth lens L6 is spherical and the image-side surface S11 of the sixth lens L6 is aspherical. In the third embodiment, the object-side surface S10 of the sixth lens L6 is bonded to the image-side surface S10 of the fifth lens L5, and the fifth lens L5 and the sixth lens L6 are combined as a compound lens having negative refractive power.

[0062] The seventh lens L7 has positive refractive power, and the object side surface S12 of the seventh lens L7 is a convex surface, and the image side surface S13 of the seventh lens L7 is a concave surface, of which the object side surface S12 of the seventh lens L7 is aspherical, and the image side surface S13 of the seventh lens L7 is spherical.

[0063] The optical imaging lens device 300 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 S14, and the surface facing the image side forms an image-side surface S15. The infrared filter L8 is located on one side of the image-side surface S13 of the seventh lens L7 and limits the infrared spectrum received by the optical imaging lens device 300 to improve the quality and fidelity of the image. The surface of the protective glass L9 facing the object side forms an object-side surface S16, and the surface facing the image side forms a side surface S17. The protective glass L9 is located on one side of the infrared filter L8 and is between the infrared filter L8 and the image plane Im to protect the infrared filter L8.

[0064] To ensure that the optical imaging lens device 300 of the present invention can maintain excellent optical performance and high-level imaging quality, in a third embodiment, the optical imaging lens device 300 satisfies the following conditional formula: (15)-0.459 <F / f1<-0.435 (16)-0.385 <F / f2<-0.362 (17) 1,000 <F / f3<1.200 (18)0.600 <F / f4<0.800 (19)1.155 <F / f5<1.205 (20)-2.523 <F / f6<-2.412 (21)0.249 <F / f7<0.286 (22)0.455 <F / fg1<0.471 (23)0.335 <F / fg2<0.367。

[0065] Wherein, F is the focal length of the optical imaging lens device 300, f1 is the focal length of the first lens L1, f2 is the focal length of the second lens L2, 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.

[0066] Table 5 below lists the optical data of the optical imaging lens device 300 according to the third embodiment of the present invention, including the focal length F (also referred to as the effective focal length), aperture value Fno, field of view FOV, radius of curvature R of each lens, distance from each surface to the surface along 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. Table 5: Optical data table of the optical imaging lens device according to the third embodiment JPEG2025121809000008.jpg123170

[0067] As can be seen from Table 5 above, the optical imaging lens device 300 according to the third embodiment has a focal length F=15.50 mm, an aperture value Fno=1.70, and a field of view FOV=33.97 degrees, of which the focal length f1 of the first lens L1 is -33.852. the focal length f2 of the second lens L2 = -40.394 mm, the focal length f3 of the third lens L3 = 14.000 mm, the focal length f4 of the fourth lens L4 = 21.143 mm, the focal length f5 of the fifth lens L5 = 12.869 mm, the focal length f6 of the sixth lens L6 = -6.143 mm, the focal length f7 of the seventh lens L7 = 62.096 mm, the adhesive focal length f23 of the compound lens formed by adhering the second lens L2 and the third lens L3 = 20.523 mm, the adhesive focal length f56 of the compound lens formed by adhering the fifth lens L5 and the sixth lens L6 = -18.419 mm, the combined focal length fg1 of the first lens group G1 = 32.958 mm, and the combined focal length fg2 of the second lens group G2 = 46.090 mm.

[0068] Based on the above detailed parameters, the detailed values of the conditional expressions in the third embodiment are as follows: (1) F / f1=-0.458 (2) F / f2 = -0.384 (3) F / f3=1.107 (4) F / f4=0.700 (5) F / f5=1.204 (6) F / f6=-2.522 (7) F / f7=0.250 (8) F / fg1=0.470 (9)F / fg2=0.336.

[0069] From the data in Table 5 above, it can be seen that the focal lengths of the lenses in the third embodiment, the combined focal length fg1 of the first lens group G1, and the combined focal length fg2 of the second lens group G2 all satisfy the proportional value conditional expressions (1) to (9) set in the optical imaging lens device 300.

[0070] In the third embodiment, the optical imaging lens device 300 satisfies the following conditional expression. (24)0.900 <F / R9<1.100 (25) 2,500 <F / R11<2.700 (26)0.104 <fg1 / (R1+R2+R3+R4+R5 +R7+R8+R9+R10+R11+R12+R13) <0.115 (27)0.141 <fg2 / (R1+R2+R3+R4+R5 +R7+R8+R9+R10+R11+R12+R13) < 0.148 (28)0.048 <F / (R1+R2+R3+R4+R5 +R7+R8+R9+R10+R11+R12+R13) <0.053。

[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 that is attached to the object-side surface S4 of the third lens L3, R5 is the radius of curvature of the image-side surface S5 of the third lens L3, R7 is the radius of curvature of the object-side surface S7 of the fourth lens L4, and R8 is the radius of curvature of the image-side surface S4 of the fourth lens L4. R is the radius of curvature of the side surface S8, R9 is the radius of curvature of the object-side surface S9 of the fifth lens L5, R10 is the radius of curvature of the image-side surface S10 of the fifth lens L5 correspondingly adhered to the object-side surface S10 of the sixth lens L6, R11 is the radius of curvature of the image-side surface S11 of the sixth lens L6, R12 is the radius of curvature of the object-side surface S12 of the seventh lens L7, R13 is the radius of curvature of the image-side surface S13 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] Based on the detailed parameters in Table 5 above, the detailed values of the conditional expressions (10) to (14) in the third embodiment are as follows: (10)F / R9=1.006 (11)F / R11=2.694 (12)fg1 / (R1+R2+R3+R4+R5+R7+R8+R9+R10+R11+R12+R13)=0.105 (13)fg2 / (R1+R2+R3+R4+R5+R7+R8+R9+R10+R11+R12+R13)=0.147 (14)F / (R1+R2+R3+R4+R5+R7+R8+R9+R10+R11+R12+R13)=0.049.

[0073] From the data in Table 5 above, it can be seen that the relevant values in the third embodiment all satisfy the conditional expressions (10) to (14) set for the optical imaging lens device 300.

[0074] The contour shapes Z of the aspheric surfaces of the object-side surface S1 and the image-side surface S2 of the first lens L1, the image-side surface S11 of the sixth lens L6, and the object-side surface S12 of the seventh lens L7 in the third example can be obtained by the following formula: JPEG2025121809000009.jpg19152Of these, Z is the surface profile of the aspheric surface, c is the reciprocal of the radius of curvature, h is half the off-axis height of the surface, k is the conic constant, A4, A6, A8, A10, A12, A14 and A16 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 conic constant k and the orders of the coefficients A4, A6, A8, A10, A12, A14 and A16 for each aspheric surface are shown in Table 6 below. Table 6: Conic coefficient table for each aspherical surface according to the third embodiment JPEG2025121809000010.jpg79170

[0076] Next, the imaging quality of the optical imaging lens device 300 will be verified based on optical simulation data. Figure 3B shows the vertical spherical aberration diagram for the third embodiment. Observing this diagram, the curves formed by each wavelength are quite close to each other. This is because the off-axis light rays from each wavelength at different heights converge at a close focal point, resulting in a clear improvement in chromatic aberration. Observing the diagonal width of each curve, the deviation of the focal point for off-axis light rays at different heights can be kept within the range of -0.02 mm to 0.07 mm. Therefore, the third embodiment clearly improves spherical aberration for different wavelengths.

[0077] 3C is a diagram showing the lateral spherical aberration of the third embodiment of the present invention. Observing this diagram, the lateral aberrations of the shortest and longest wavelengths incident on the imaging plane are both less than 6 micrometers. Therefore, the optical imaging lens device 300 has low lateral spherical aberration, which tends to align the positions of light beams with different wavelengths on the imaging plane, thereby improving the color standard and imaging quality of the image.

[0078] The above are merely preferred embodiments of the present invention, and it should be noted that the data in the above tables do not limit the present invention, and anyone 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 substitutions made based on the specification and claims of the present invention are 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 S6 Aperture Z optical axis S1, S3, S4, S7, S9, S10, S12, S14, S16 Object side S2, S4, S5, S8, S10, S11, S13, S15, S17 Image side

Claims

1. Along the optical axis, from the object side to the image side, a first lens group including a first lens, a second lens, and a third lens arranged along the optical axis from the object side to the image side; An aperture, a second lens group including 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 first lens has negative refractive power, a concave object-side surface, and a convex image-side surface; the second lens has a negative refractive power, the third lens has a positive refractive power, the fourth lens has a positive refractive power, the fifth lens has a positive refractive power, the sixth lens has a negative refractive power, 10. An optical imaging lens device, wherein the seventh lens has a positive refractive power.

2. the second lens has a convex object-side surface and a concave image-side surface, the third lens, the fourth lens, and the fifth lens are all biconvex lenses, the sixth lens is a biconcave lens, 2. The optical imaging lens system of claim 1, wherein the seventh lens has a convex object-side surface and a concave image-side surface.

3. the object-side surface and the image-side surface of the first lens are both aspherical, the object-side surface and the image-side surface of the second lens are both spherical surfaces, the object-side surface and the image-side surface of the third lens are both spherical surfaces, the object-side surface and the image-side surface of the fourth lens are both spherical surfaces, the object-side surface and the image-side surface of the fifth lens are both spherical surfaces, 2. The optical imaging lens device according to claim 1, wherein the image-side surface of said sixth lens and the object-side surface of said seventh lens are both aspheric.

4. 2. The optical imaging lens device of claim 1, wherein the optical imaging lens device satisfies the condition 0.455<F / fg1<0.471, where F is the focal length of the optical imaging lens device and fg1 is the combined focal length of the first lens group.

5. 2. The optical imaging lens device of claim 1, wherein the optical imaging lens device satisfies the condition 0.335<F / fg2<0.367, where F is the focal length of the optical imaging lens device and fg2 is the combined focal length of the second lens group.

6. 2. The optical imaging lens device of claim 1, wherein the optical imaging lens device satisfies the condition 1.000<F / f3<1.200, 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 device of claim 1, wherein the optical imaging lens device satisfies the condition 0.600<F / f4<0.800, where F is the focal length of the optical imaging lens device and f4 is the focal length of the fourth lens.

8. 2. The optical tube lens device of claim 1, wherein the optical tube lens device satisfies the condition 0.900<F / R9<1.100, where F is the focal length of the optical tube lens device and R9 is the radius of curvature of the object-side surface of the fifth lens.

9. 2. The optical imaging lens device of claim 1, wherein the optical imaging lens device satisfies the condition 2.500<F / R11<2.700, 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 sixth lens.

10. Along the optical axis, from the object side to the image side, a first lens group including a first lens, a second lens, and a third lens arranged along the optical axis from the object side to the image side; An aperture, a second lens group including 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 first lens has negative refractive power, a concave object-side surface, and a convex image-side surface; the image side surface of the second lens and the object side surface of the third lens are adhesively bonded to form a compound lens having a positive refractive power; the fourth lens has a positive refractive power, the image-side surface of the fifth lens and the object-side surface of the sixth lens are adhesively bonded to form a compound lens having a negative refractive power; 10. An optical imaging lens device, wherein the seventh lens has a positive refractive power.

11. the second lens has a convex object-side surface and a concave image-side surface, the third lens, the fourth lens, and the fifth lens are all biconvex lenses, the sixth lens is a biconcave lens, 11. The optical imaging lens system of claim 10, wherein the seventh lens has a convex object-side surface and a concave image-side surface.

12. the object-side surface and the image-side surface of the first lens are both aspherical, the object-side surface and the image-side surface of the second lens are both spherical surfaces, the object-side surface and the image-side surface of the third lens are both spherical surfaces, the object-side surface and the image-side surface of the fourth lens are both spherical surfaces, the object-side surface and the image-side surface of the fifth lens are both spherical surfaces, 11. The optical imaging lens device according to claim 10, wherein the image-side surface of the sixth lens and the object-side surface of the seventh lens are both aspheric.

13. 11. The optical imaging lens device of claim 10, wherein the condition 0.455<F / fg1<0.471 is satisfied, where F is the focal length of the optical imaging lens device, and fg1 is the combined focal length of the first lens group.

14. 11. The optical imaging lens device of claim 10, wherein the optical imaging lens device satisfies the condition 0.335<F / fg2<0.367, where F is the focal length of the optical imaging lens device and fg2 is the combined focal length of the second lens group.

15. 11. The optical imaging lens device of claim 10, wherein the condition 1.000<F / f3<1.200 is satisfied, where F is the focal length of the optical imaging lens device and f3 is the focal length of the third lens.

16. 11. The optical imaging lens device of claim 10, wherein the optical imaging lens device satisfies the condition 0.600<F / f4<0.800, where F is the focal length of the optical imaging lens device and f4 is the focal length of the fourth lens.

17. 11. The optical tube lens device of claim 10, wherein the optical tube lens device satisfies the condition 0.900<F / R9<1.100, where F is the focal length of the optical tube lens device and R9 is the radius of curvature of the object-side surface of the fifth lens.

18. 11. The optical imaging lens device of claim 10, wherein the optical imaging lens device satisfies the condition 2.500<F / R11<2.700, 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 sixth lens.

19. The optical imaging lens device satisfies the condition 0.104<fg1 / (R1+R2+R3+R4+R5+R7+R8+R9+R10+R11+R12+R13)<0.115, 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 corresponding to the object-side surface of the third lens, and R5 is the radius of curvature of the image-side surface of the third lens.

11. The optical imaging lens device of claim 10, wherein R1 is a radius of curvature of the image-side surface of the fifth lens, R2 is a radius of curvature of the image-side surface of the sixth lens, R3 is a radius of curvature of the image-side surface of the fifth lens, R4 is a radius of curvature of the image-side surface of the sixth lens, R5 is a radius of curvature of the image-side surface of the sixth lens, R6 is a radius of curvature of the image-side surface of the sixth lens, R7 is a radius of curvature of the object-side surface of the fourth lens, R8 is a radius of curvature of the image-side surface of the fourth lens, R9 is a radius of curvature of the object-side surface of the fifth lens, R10 is a radius of curvature of the image-side surface of the fifth lens corresponding to the object-side surface of the sixth lens, R11 is a radius of curvature of the image-side surface of the sixth lens, R12 is a radius of curvature of the object-side surface of the seventh lens, and R13 is a radius of curvature of the image-side surface of the seventh lens.

20. The optical imaging lens device satisfies the condition 0.141<fg2 / (R1+R2+R3+R4+R5+R7+R8+R9+R10+R11+R12+R13)<0.148, 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 corresponding to the object-side surface of the third lens, and R5 is the radius of curvature of the third lens.

11. The optical imaging lens device of claim 10, wherein R1 is the radius of curvature of the image-side surface of the fourth lens, R2 is the radius of curvature of the object-side surface of the fourth lens, R3 is the radius of curvature of the image-side surface of the fifth lens, R4 is the radius of curvature of the image-side surface of the fifth lens, R5 is the radius of curvature of the image-side surface of the sixth lens, R6 is the radius of curvature of the image-side surface of the sixth lens, R7 is the radius of curvature of the object-side surface of the fourth lens, R8 is the radius of curvature of the image-side surface of the fourth lens, R9 is the radius of curvature of the object-side surface of the fifth lens, R10 is the radius of curvature of the image-side surface of the fifth lens correspondingly adhered to the object-side surface of the sixth lens, R11 is the radius of curvature of the image-side surface of the sixth lens, R12 is the radius of curvature of the object-side surface of the seventh lens, and R13 is the radius of curvature of the image-side surface of the seventh lens.

21. The optical imaging lens device satisfies the condition 0.048<F / (R1+R2+R3+R4+R5+R7+R8+R9+R10+R11+R12+R13)<0.053, where F is the focal length of the optical imaging lens device, 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 corresponding to the object-side surface of the third lens, and R5 is the radius of curvature of the third lens.

11. The optical imaging lens device of claim 10, wherein R1 is the radius of curvature of the image-side surface of the fifth lens, R2 is the radius of curvature of the image-side surface of the fifth lens, R3 is the radius of curvature of the image-side surface of the sixth lens, R4 is the radius of curvature of the image-side surface of the fifth lens, R5 is the radius of curvature of the image-side surface of the sixth lens, R6 is the radius of curvature of the image-side surface of the sixth lens, R7 is the radius of curvature of the object-side surface of the fourth lens, R8 is the radius of curvature of the image-side surface of the fourth lens, R9 is the radius of curvature of the object-side surface of the fifth lens, R10 is the radius of curvature of the image-side surface of the fifth lens corresponding to the object-side surface of the sixth lens, R11 is the radius of curvature of the image-side surface of the sixth lens, R12 is the radius of curvature of the object-side surface of the seventh lens, and R13 is the radius of curvature of the image-side surface of the seventh lens.

Images