Optical imaging lens device

Abstract

To provide an optical imaging lens device having an advantage of excellent imaging quality.SOLUTION: The optical imaging lens includes, in order from an object side to an image side along an optical axis, a first lens group, an aperture, and a second lens group. The first lens group consists of a first lens and a second lens which are arranged along the optical axis from an object side to an image side, the first lens has a negative refractive power, an object-side surface of the first lens is a concave surface, an image-side surface of the first lens is a convex surface, the second lens has a positive refractive power; The second lens group includes a third lens, a fourth lens and a fifth lens arranged along the optical axis from an object side to an image side, wherein the third lens has negative refractive power, the fourth lens has positive refractive power, the fifth lens has negative refractive power, an object-side surface of the fifth lens is a concave surface, an image-side surface of the fifth lens is a convex surface. By arranging the lenses in the optical imaging lens apparatus, a good 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. Optical systems typically use charge-coupled devices (CCDs) or complementary metal-oxide semiconductor (CMOS) sensors as their photosensitive elements. 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) play an increasingly important role in vehicle safety. These systems utilize various lens devices and sensors to collect real-time environmental information and provide drivers with more comprehensive information. Furthermore, as the temperature of vehicle lens devices changes in response to environmental temperature changes, the quality of lens devices must also improve to meet temperature needs, resulting in increased demands for imaging quality.

[0003] Generally, a good imaging lens device has advantages such as low distortion and high resolution. However, in practical applications, small size and cost must also be considered. Therefore, it is one of the difficult problems for designers to design a lens device with good imaging quality despite various constraints. Summary of the Invention [Problem to be solved by the invention]

[0004] In view of this, the present invention aims to provide an optical imaging lens arrangement that has the advantage of excellent imaging quality. [Means for solving the problem]

[0005] In order 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 and a second lens that are aligned 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 positive refractive power. The second lens group is composed of a third lens, a fourth lens, and a fifth lens that are aligned along the optical axis from the object side to the image side. The third lens has negative refractive power. The fourth lens has positive refractive power. The fifth lens has negative refractive power. The object-side surface of the fifth lens is concave, and the image-side surface of the fifth lens is convex. [Effects of the Invention]

[0006] The advantages of the present invention are as follows: The optical imaging lens device has at least five lenses arranged as optical components, and the refractive power of the optical imaging lens device can be accurately arranged to meet specific conditions, thereby achieving excellent imaging quality. [Brief explanation of the drawings]

[0007] [Figure 1A] 1 is a schematic diagram showing the configuration of an optical imaging lens device according to a first embodiment of the present invention. [Figure 1B] FIG. 3 is a vertical color difference diagram of the optical imaging lens device according to the first embodiment of the present invention. [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 showing the configuration of an optical imaging lens device according to a second embodiment of the present invention. [Figure 2B]FIG. 10 is a vertical color difference diagram 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 showing the configuration of an optical imaging lens device according to a third embodiment of the present invention. [Figure 3B] FIG. 10 is a vertical color difference diagram 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

[0008] To further clarify the present invention, preferred embodiments will be described in detail below with reference to the accompanying 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 S5, 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 device 100 includes at least five lenses, where the first lens group G1 is composed of a first lens L1 and a second lens L2, arranged along the optical axis Z from the object side to the image side, and the second lens group G2 is composed of a third lens L3, a fourth lens L4, and a fifth lens L5, arranged along the optical axis Z from the object side to the image side. The first lens L1, the second lens L2, and the fifth lens L5 are all single lenses. That is, there is an air gap distance between the first lens L1 and the second lens L2 on the optical axis Z, and between the fourth lens L4 and the fifth lens L5 on the optical axis Z, respectively, and the third lens L3 and the fourth lens L4 are bonded together to form a compound lens.

[0009] The first lens L1 has negative refractive power, an object-side surface S1 of the first lens L1 is concave, and an image-side surface S2 of the first lens L1 is convex. In this embodiment, the object-side surface S1 and the image-side surface S2 of the first lens L1 are both aspherical.

[0010] The second lens L2 is a biconvex lens having positive refractive power, and in this embodiment, both the object-side surface S3 and the image-side surface S4 of the second lens L2 are spherical.

[0011] The third lens L3 has negative refractive power, the object side surface S6 of the third lens L3 is a convex surface, and the image side surface S7 of the third lens L3 is a concave surface. In this embodiment, the object side surface S6 and the image side surface S7 of the third lens L3 are both spherical.

[0012] The fourth lens L4 is a biconvex lens having positive refractive power, of which the object-side surface S7 and the image-side surface S8 of the fourth lens L4 are both spherical. In this embodiment, the image-side surface S7 of the third lens L3 is correspondingly adhered to the object-side surface S7 of the fourth lens L4, thereby combining the third lens L3 and the fourth lens L4 into a compound lens having positive refractive power.

[0013] The fifth lens L5 has negative refractive power, the object side surface S9 of the fifth lens L5 is concave, and the image side surface S10 of the fifth lens L5 is convex. In this embodiment, the object side surface S9 and the image side surface S10 of the fifth lens L5 are both aspherical.

[0014] The optical imaging lens device 100 further includes an infrared filter L6 and a protective glass L7. The infrared filter L6 forms an object-side surface S11 on its surface facing the object side and an image-side surface S12 on its surface facing the image side. The infrared filter L6 is located on one side of the image-side surface S10 of the fifth lens L5 and limits the infrared spectrum received by the optical imaging lens device 100 to improve image quality and realism. The protective glass L7 forms an object-side surface S13 on its surface facing the object side and an image-side surface S14 on its surface facing the image side. The protective glass L7 is located on one side of the infrared filter L6 and is positioned between the infrared filter L6 and the image plane Im to protect the infrared filter L6.

[0015] To ensure that the optical imaging lens device 100 of the present invention maintains excellent optical performance and high level of imaging quality, in a first embodiment, the optical imaging lens device 100 satisfies the following conditional formula: (1)-17.00< F / (f1+f2)<-12.00 (2) -0.50< F / (f3+f4+f5)<-0.30 (3)-0.76 <F / f1<-0.73 (4) 0.78≦F / f2<0.8 (5)-0.49 <F / f3<-0.46 (6) 1.30 <F / f4<1.35 (7)-0.89 <F / f5<-0.83 (8)-0.80 <fg2 / (R1+R2+R3+R4+R6+R7+R8+R9+R10)<-0.30 (9)-1.50 <fg2 / (R6+R7+R8+R9+R10)<-0.80 (10)-0.80 <fg1 / (R1+R2+R3+R4+R6+R7+R8+R9+R10)<-0.60 (11)-1.60 <fg1 / (R1+R2+R3+R4)<-1.50 (12)-2.00< F / R1<-1.50 (13)-0.80< F / R2<-0.60 (14) 0.55< F / R3<0.65 (15)-0.70< F / R4<-0.55 (16) 1.00< F / R6<1.60 (17) 1.90< F / R7<2.00 (18)-0.45< F / R8<-0.35 (19)-2.95< F / R9<-2.75 (20)-1.50< F / R10<-1.40

[0016] where 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, fg1 is the combined focal length of the first lens group G1, fg2 is the combined focal length of the second lens group G2, R1 is the radius of curvature of the object-side surface S1 of the first lens L1, and R2 is the radius of curvature of the image-side surface S2 of the first lens L1. R10 is the radius of curvature of the image-side surface S10 of the fifth lens L5, R2 is the radius of curvature of the image-side surface S2 of the fifth lens L6, 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, R6 is the radius of curvature of the object-side surface S6 of the third lens L3, R7 is the combined radius of curvature of the image-side surface S7 of the third lens L3 and the object-side surface S7 of the fourth lens L4, R8 is the radius of curvature of the image-side surface S8 of the fourth lens L4, R9 is the radius of curvature of the object-side surface S9 of the fifth lens L5, and R10 is the radius of curvature of the image-side surface S10 of the fifth lens L5.

[0017] 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 in mm.

[0018] JPEG2026015127000002.jpg134170

[0019] As can be seen from Table 1 above, the optical imaging lens device 100 of the first embodiment has a focal length F=15.245mm, an aperture value Fno=15.245, and a field of view FOV=34.7 degrees, of which the focal length of the first lens L1 is f1=-20.281mm, the focal length of the second lens L2 is f2=19.109mm, the focal length of the third lens L3 is f3=-31.537mm, the focal length of the fourth lens L4 is f4=11.347mm, the focal length of the fifth lens L5 is f5=-17.491mm, the adhesive focal length of the compound lens formed by adhering the third lens L3 and the fourth lens L4 together is f34=18.559mm, the combined focal length of the first lens group G1 is fg1=49.757mm, and the combined focal length of the second lens group G2 is fg2=37.472mm.

[0020] Based on the above detailed parameters, the specific values ​​of the above conditional expressions in the first embodiment are as follows: (1)F / (f1+f2)=-13.015 (2)F / (f3+f4+f5)=-0.407 (3) F / f1=-0.752 (4) F / f2=0.798 (5) F / f3=-0.483 (6) F / f4=1.344 (7) F / f5=-0.872 (8)fg2 / (R1+R2+R3+R4+R6+R7+R8+R9+R10)=-0.575 (9)fg2 / (R6+R7+R8+R9+R10)=-1.113 (10)fg1 / (R1+R2+R3+R4+R6+R7+R8+R9+R10)=-0.764 (11)fg1 / (R1+R2+R3+R4)=-1.581 (12)F / R1=-1.708 (13)F / R2=-0.676 (14)F / R3=0.625 (15)F / R4=-0.625 (16)F / R6=1.313 (17)F / R7=1.974 (18)F / R8=-0.406 (19)F / R9=-2.921 (20)F / R10=-1.489

[0021] As can be seen from the data in Table 1 above, the focal length of the first lens L1, the focal length of the fifth lens L5, the combined focal length fg1 of the first lens group G1, the combined focal length fg2 of the second lens group G2, and the radii of curvature of the first lens L1 and the fifth lens L5 in the first embodiment all satisfy the proportionality conditional expressions (1) to (20) set for the optical imaging lens device 100.

[0022] Furthermore, 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 and the object side surface S9 and the image side surface S10 of the fifth lens L5 in the first example are obtained by the following equation. JPEG2026015127000003.jpg21170Of these, Z is the surface profile of the aspheric surface, c: the reciprocal of the radius of curvature, h is half the off-axis height at the surface; k is the conic constant, A2, A4, A6, A8, A10, A12, A14 and A16 are the orders of the coefficients of half the off-axis height h at the surface.

[0023] In the optical imaging lens device 100 according to one embodiment of the present invention, the conic constant k of each aspheric surface, and the orders of the coefficients A2, A4, A6, A8, A10, A12, A14, and A16 are shown in Table 2 below.

[0024] JPEG2026015127000004.jpg58170

[0025] Next, the imaging quality of the optical imaging lens device 100 will be verified based on optical simulation data. Figure 1B is a vertical color difference diagram of the first embodiment of the present invention, and Figure 1C is a horizontal color difference diagram of the first embodiment of the present invention. The results of Figures 1B and 1C can verify that the imaging quality of the optical imaging lens device 100 according to this embodiment can be effectively improved based on the above design.

[0026] 2A , an optical imaging lens device 200 according to a second embodiment of the present invention includes a first lens group G1, an aperture S5, 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 second embodiment, the optical imaging lens device 200 includes at least five lenses. The first lens group G1 includes a first lens L1 and a second lens L2, which are arranged along the optical axis Z from the object side to the image side. The second lens group G2 includes a third lens L3, a fourth lens L4, and a fifth lens L5, which are arranged along the optical axis Z from the object side to the image side. The first lens L1, the second lens L2, and the fifth lens L5 are all single lenses. An air gap exists between the first lens L1 and the second lens L2 on the optical axis Z, and between the fourth lens L4 and the fifth lens L5 on the optical axis Z, respectively. The third lens L3 and the fourth lens L4 are bonded together to form a compound lens.

[0027] The first lens L1 has negative refractive power, an object-side surface S1 of the first lens L1 is concave, and an image-side surface S2 of the first lens L1 is convex. In this embodiment, the object-side surface S1 and the image-side surface S2 of the first lens L1 are both aspherical.

[0028] The second lens L2 is a biconvex lens having positive refractive power, and in this embodiment, both the object-side surface S3 and the image-side surface S4 of the second lens L2 are spherical.

[0029] The third lens L3 has negative refractive power, the object side surface S6 of the third lens L3 is a convex surface, and the image side surface S7 of the third lens L3 is a concave surface. In this embodiment, the object side surface S6 and the image side surface S7 of the third lens L3 are both spherical.

[0030] The fourth lens L4 is a biconvex lens having positive refractive power, of which the object-side surface S7 and the image-side surface S8 of the fourth lens L4 are both spherical. In this embodiment, the image-side surface S7 of the third lens L3 is correspondingly adhered to the object-side surface S7 of the fourth lens L4, thereby combining the third lens L3 and the fourth lens L4 into a compound lens having positive refractive power.

[0031] The fifth lens L5 has negative refractive power, the object side surface S9 of the fifth lens L5 is concave, and the image side surface S10 of the fifth lens L5 is convex. In this embodiment, the object side surface S9 and the image side surface S10 of the fifth lens L5 are both aspherical.

[0032] The optical imaging lens device 200 further includes an infrared filter L6 and a protective glass L7. The infrared filter L6 forms an object-side surface S11 on its surface facing the object side and an image-side surface S12 on its surface facing the image side. The infrared filter L6 is located on one side of the image-side surface S10 of the fifth lens L5 and limits the infrared spectrum received by the optical imaging lens device 200 to improve image quality and realism. The protective glass L7 forms an object-side surface S13 on its surface facing the object side and an image-side surface S14 on its surface facing the image side. The protective glass L7 is located on one side of the infrared filter L6, between the infrared filter L6 and the image plane Im, to protect the infrared filter L6.

[0033] In order to ensure that the optical imaging lens device 200 of the present invention maintains excellent optical performance and high level of imaging quality, in the second embodiment, the optical imaging lens device 200 satisfies the following conditional formula: (1)-17.00< F / (f1+f2)<-12.00 (2) -0.50< F / (f3+f4+f5)<-0.30 (3)-0.76 <F / f1<-0.73 (4) 0.78≦F / f2<0.8 (5)-0.49 <F / f3<-0.46 (6) 1.30 <F / f4<1.35 (7)-0.89 <F / f5<-0.83 (8)-0.80 <fg2 / (R1+R2+R3+R4+R6+R7+R8+R9+R10)<-0.30 (9)-1.50 <fg2 / (R6+R7+R8+R9+R10)<-0.80 (10)-0.80 <fg1 / (R1+R2+R3+R4+R6+R7+R8+R9+R10)<-0.60 (11)-1.60 <fg1 / (R1+R2+R3+R4)<-1.50 (12)-2.00< F / R1<-1.50 (13)-0.80< F / R2<-0.60 (14) 0.55< F / R3<0.65 (15)-0.70< F / R4<-0.55 (16) 1.00< F / R6<1.60 (17) 1.90< F / R7<2.00 (18)-0.45< F / R8<-0.35 (19)-2.95< F / R9<-2.75 (20)-1.50< F / R10<-1.40

[0034] where 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, fg1 is the combined focal length of the first lens group G1, fg2 is the combined focal length of the second lens group G2, R1 is the radius of curvature of the object-side surface S1 of the first lens L1, and R2 is the radius of curvature of the image-side surface S2 of the first lens L1. R10 is the radius of curvature of the image-side surface S10 of the fifth lens L5, R2 is the radius of curvature of the image-side surface S2 of the fifth lens L6, 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, R6 is the radius of curvature of the object-side surface S6 of the third lens L3, R7 is the combined radius of curvature of the image-side surface S7 of the third lens L3 and the object-side surface S7 of the fourth lens L4, R8 is the radius of curvature of the image-side surface S8 of the fourth lens L4, R9 is the radius of curvature of the object-side surface S9 of the fifth lens L5, and R10 is the radius of curvature of the image-side surface S10 of the fifth lens L5.

[0035] Table 3 below shows 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 in mm.

[0036] JPEG2026015127000005.jpg116170

[0037] As can be seen from Table 3 above, the optical imaging lens device 200 of the second embodiment has a focal length F=15.195mm, an aperture value Fno=1.761, and a field of view FOV=35.039 degrees, of which the focal length of the first lens L1 is f1=-20.239mm, the focal length of the second lens L2 is f2=19.305mm, the focal length of the third lens L3 is f3=-31.736mm, the focal length of the fourth lens L4 is f4=11.353mm, the focal length of the fifth lens L5 is f5=-17.090mm, the adhesive focal length of the compound lens formed by adhering the third lens L3 and the fourth lens L4 together is f34=18.500mm, the combined focal length of the first lens group G1 is fg1=49.635mm, and the combined focal length of the second lens group G2 is fg2=37.923mm.

[0038] Based on the above detailed parameters, the specific values ​​of the above conditional expressions in the first embodiment are as follows: (1)F / (f1+f2)=-16.273 (2)F / (f3+f4+f5)=-0.406 (3) F / f1=-0.751 (4) F / f2=0.787 (5) F / f3=-0.479 (6) F / f4=1.338 (7) F / f5=-0.889 (8)fg2 / (R1+R2+R3+R4+R6+R7+R8+R9+R10)=-0.584 (9)fg2 / (R6+R7+R8+R9+R10)=-1.128 (10)fg1 / (R1+R2+R3+R4+R6+R7+R8+R9+R10)=-0.764 (11)fg1 / (R1+R2+R3+R4)=-1.584 (12)F / R1=-1.705 (13)F / R2=-0.674 (14)F / R3=0.620 (15)F / R4=-0.623 (16)F / R6=1.312 (17)F / R7=1.966 (18)F / R8=-0.405 (19)F / R9=-2.946 (20)F / R10=-1.487

[0039] As can be seen from the data in Table 3 above, in the second embodiment, the focal length of the first lens L1, the focal length of the fifth lens L5, the combined focal length fg1 of the first lens group G1, the combined focal length fg2 of the second lens group G2, and the radii of curvature of the first lens L1 and the fifth lens L5 all satisfy the proportionality conditional expressions (1) to (20) set in the optical imaging lens device 200.

[0040] 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 and the object-side surface S9 and the image-side surface S10 of the fifth lens L5 in the second example are obtained by the following equation: JPEG2026015127000006.jpg21170Of 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 at the surface; k is the conic constant, A2, A4, A6, A8, A10, A12, A14 and A16 are the orders of the coefficients of half the off-axis height h at the surface.

[0041] In the optical imaging lens device 200 according to the second embodiment of the present invention, the conic constant k, A2, A4, A6, A8, A10, A12, A14 and A16 of each aspheric surface have orders as shown in Table 4 below.

[0042] JPEG2026015127000007.jpg59170

[0043] Next, the imaging quality of the optical imaging lens device 200 is verified based on optical simulation data. Figure 2B is a vertical color difference diagram of the second embodiment of the present invention, and Figure 2C is a horizontal color difference diagram of the second embodiment of the present invention. The results of Figures 2B and 2C can verify that the imaging quality of the optical imaging lens device 200 according to this embodiment can be effectively improved based on the above design.

[0044] 3A , an optical imaging lens device 300 according to a third embodiment of the present invention includes a first lens group G1, an aperture S5, 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 device 300 includes at least five lenses, where the first lens group G1 is composed of a first lens L1 and a second lens L2 arranged along the optical axis Z from the object side to the image side, and the second lens group G2 is composed of a third lens L3, a fourth lens L4, and a fifth lens L5 arranged along the optical axis Z from the object side to the image side. The first lens L1, the second lens L2, and the fifth lens L5 are all single lenses. An air gap exists between the first lens L1 and the second lens L2 on the optical axis Z, and between the fourth lens L4 and the fifth lens L5 on the optical axis Z, respectively. The third lens L3 and the fourth lens L4 are bonded together to form a compound lens.

[0045] The first lens L1 has negative refractive power, an object-side surface S1 of the first lens L1 is concave, and an image-side surface S2 of the first lens L1 is convex. In this embodiment, the object-side surface S1 and the image-side surface S2 of the first lens L1 are both aspherical.

[0046] The second lens L2 is a biconvex lens having positive refractive power, and in this embodiment, both the object-side surface S3 and the image-side surface S4 of the second lens L2 are spherical.

[0047] The third lens L3 has negative refractive power, the object side surface S6 of the third lens L3 is a convex surface, and the image side surface S7 of the third lens L3 is a concave surface. In this embodiment, the object side surface S6 and the image side surface S7 of the third lens L3 are both spherical.

[0048] The fourth lens L4 is a biconvex lens having positive refractive power, of which the object-side surface S7 and the image-side surface S8 of the fourth lens L4 are both spherical. In this embodiment, the image-side surface S7 of the third lens L3 is correspondingly adhered to the object-side surface S7 of the fourth lens L4, thereby combining the third lens L3 and the fourth lens L4 into a compound lens having positive refractive power.

[0049] The fifth lens L5 has negative refractive power, the object side surface S9 of the fifth lens L5 is concave, and the image side surface S10 of the fifth lens L5 is convex. In this embodiment, the object side surface S9 and the image side surface S10 of the fifth lens L5 are both aspherical.

[0050] The optical imaging lens device 300 further includes an infrared filter L6 and a protective glass L7. The infrared filter L6 forms an object-side surface S11 on its surface facing the object side and an image-side surface S12 on its surface facing the image side. The infrared filter L6 is located on one side of the image-side surface S10 of the fifth lens L5 and limits the infrared spectrum received by the optical imaging lens device 300 to improve image quality and realism. The protective glass L7 forms an object-side surface S13 on its surface facing the object side and an image-side surface S14 on its surface facing the image side. The protective glass L7 is located on one side of the infrared filter L6, between the infrared filter L6 and the image plane Im, to protect the infrared filter L6.

[0051] In order to ensure that the optical imaging lens device 300 of the present invention maintains excellent optical performance and high level of imaging quality, in the third embodiment, the optical imaging lens device 300 satisfies the following conditional formula: (1)-17.00< F / (f1+f2)<-12.00 (2) -0.50< F / (f3+f4+f5)<-0.30 (3)-0.76 <F / f1<-0.73 (4) 0.78≦F / f2<0.8 (5)-0.49 <F / f3<-0.46 (6) 1.30 <F / f4<1.35 (7)-0.89 <F / f5<-0.83 (8)-0.80 <fg2 / (R1+R2+R3+R4+R6+R7+R8+R9+R10)<-0.30 (9)-1.50 <fg2 / (R6+R7+R8+R9+R10)<-0.80 (10)-0.80 <fg1 / (R1+R2+R3+R4+R6+R7+R8+R9+R10)<-0.60 (11)-1.60 <fg1 / (R1+R2+R3+R4)<-1.50 (12)-2.00< F / R1<-1.50 (13)-0.80< F / R2<-0.60 (14) 0.55< F / R3<0.65 (15)-0.70< F / R4<-0.55 (16) 1.00< F / R6<1.60 (17) 1.90< F / R7<2.00 (18)-0.45< F / R8<-0.35 (19)-2.95< F / R9<-2.75 (20)-1.50< F / R10<-1.40

[0052] where 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, fg1 is the combined focal length of the first lens group G1, fg2 is the combined focal length of the second lens group G2, R1 is the radius of curvature of the object-side surface S1 of the first lens L1, and R2 is the radius of curvature of the image-side surface S2 of the first lens L1. R10 is the radius of curvature of the image-side surface S10 of the fifth lens L5, R2 is the radius of curvature of the image-side surface S2 of the fifth lens L6, 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, R6 is the radius of curvature of the object-side surface S6 of the third lens L3, R7 is the combined radius of curvature of the image-side surface S7 of the third lens L3 and the object-side surface S7 of the fourth lens L4, R8 is the radius of curvature of the image-side surface S8 of the fourth lens L4, R9 is the radius of curvature of the object-side surface S9 of the fifth lens L5, and R10 is the radius of curvature of the image-side surface S10 of the fifth lens L5.

[0053] 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 next surface along the optical axis Z, refractive index Nd of each lens, dispersion, and focal length of each lens, where the units of focal length, radius of curvature, and distance are mm.

[0054] JPEG2026015127000008.jpg137170

[0055] As can be seen from Table 5 above, the optical imaging lens device 100 of the third embodiment has a focal length F=14.905mm, an aperture value Fno=1.712, and a field of view FOV=35.6 degrees, of which the focal length of the first lens L1 is f1=-20.328mm, the focal length of the second lens L2 is f2=19.109mm, the focal length of the third lens L3 is f3=-32.323mm, the focal length of the fourth lens L4 is f4=11.401mm, the focal length of the fifth lens L5 is f5=-17.888mm, the adhesive focal length of the compound lens formed by adhering the third lens L3 and the fourth lens L4 together is f34=18.438mm, the combined focal length of the first lens group G1 is fg1=49.182mm, and the combined focal length of the second lens group G2 is fg2=36.038mm.

[0056] Based on the detailed parameters above, the specific values ​​of the conditional expressions in the third embodiment are as follows: (1)F / (f1+f2)=-12.218 (2)F / (f3+f4+f5)=-0.384 (3) F / f1=-0.733 (4) F / f2=0.780 (5) F / f3=-0.461 (6) F / f4=1.307 (7) F / f5=-0.833 (8)fg2 / (R1+R2+R3+R4+R6+R7+R8+R9+R10)=-0.553 (9)fg2 / (R6+R7+R8+R9+R10)=-1.069 (10)fg1 / (R1+R2+R3+R4+R6+R7+R8+R9+R10)=-0.755 (11)fg1 / (R1+R2+R3+R4)=-1.563 (12)F / R1=-1.670 (13)F / R2=-0.661 (14)F / R3=0.611 (15)F / R4=-0.611 (16)F / R6=1.287 (17)F / R7=1.919 (18)F / R8=-0.397 (19)F / R9=-2.827 (20)F / R10=-1.456

[0057] As can be seen from the data in Table 5 above, in the third embodiment, the focal length of the first lens L1, the focal length of the fifth lens L5, the combined focal length fg1 of the first lens group G1, the combined focal length fg2 of the second lens group G2, and the radii of curvature of the first lens L1 and the fifth lens L5 all satisfy the proportionality conditional expressions (1) to (20) set for the optical imaging lens device 300.

[0058] 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 and the object side surface S9 and the image side surface S10 of the fifth lens L5 in the third example are obtained by the following equation. JPEG2026015127000009.jpg21170Of 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 at the surface; k is the conic constant, A2, A4, A6, A8, A10, A12, A14 and A16 are the orders of the coefficients of half the off-axis height h at the surface.

[0059] In the optical imaging lens device 300 according to the third embodiment of the present invention, the conic constant k of each aspheric surface, and the orders of the coefficients A2, A4, A6, A8, A10, A12, A14 and A16 are shown in Table 6 below.

[0060] JPEG2026015127000010.jpg60170

[0061] Next, the imaging quality of the optical imaging lens device 300 will be verified based on optical simulation data. Figure 3B is a vertical color difference diagram of the third embodiment of the present invention, and Figure 3C is a horizontal color difference diagram of the third embodiment of the present invention. The results of Figures 3B and 3C can verify that the above design of the optical imaging lens device 300 according to this embodiment can effectively improve the imaging quality.

[0062] 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]

[0063] 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 Infrared Filter L7 protective glass Im image plane S5 aperture Z optical axis S1, S3, S6, S7, S9, S11, S13 Object side S2, S4, S7, S8, S10, S12, S14 (side view)

Claims

1. the first lens group, an aperture, and a second lens group, in that order from the object side to the image side along the optical axis; the first lens group is composed of a first lens and a second 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 concave surface, and an image side surface of the first lens is a convex surface, the second lens has a positive refractive power, the second lens group is composed of a third lens, a fourth lens, and a fifth lens arranged along the optical axis from the object side to the image side, the third lens has a negative refractive power, the fourth lens has a positive refractive power, The fifth lens has negative refractive power, the object side surface of the fifth lens is concave, and the image side surface of the fifth lens is convex.

2. 2. The optical imaging lens device of claim 1, wherein the image side surface of the third lens and the object side surface of the fourth lens are adhesively bonded to form a compound lens having a positive refractive power, and there is an air gap distance between the first lens and the second lens on the optical axis, and between the fourth lens and the fifth lens on the optical axis, respectively.

3. 2. The optical imaging lens device of claim 1, wherein the second lens is a biconvex lens, the third lens has a convex object-side surface, the third lens has a concave image-side surface, and the fourth lens is a biconvex lens.

4. 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, 2. The optical imaging lens device of claim 1, wherein both the object-side and image-side surfaces of said fifth lens are aspheric.

5. 2. The optical imaging lens device of claim 1, wherein the optical imaging lens device satisfies the condition -17.00< F / (f1+f2)<-12.00, where F is the focal length of the optical imaging lens device, f1 is the focal length of the first lens, and f2 is the focal length of the second lens.

6. 2. The optical imaging lens device of claim 1, wherein the optical imaging lens device satisfies the condition -0.50< F / (f3+f4+f5)<-0.30, where F is the focal length of the optical imaging lens device, f3 is the focal length of the third lens, f4 is the focal length of the fourth lens, and f5 is the focal length of the fifth lens.

7. 2. The optical imaging lens device of claim 1, wherein the optical imaging lens device satisfies the condition -0.76<F / f1<-0.73, where F is the focal length of the optical imaging lens device and f1 is the focal length of the first lens.

8. 2. The optical imaging lens device of claim 1, wherein the optical imaging lens device satisfies the condition 0.78≦F / f2<0.8, where F is the focal length of the optical imaging lens device and f2 is the focal length of the second lens.

9. 2. The optical imaging lens device of claim 1, wherein the optical imaging lens device satisfies the condition -0.49<F / f3<-0.46, where F is the focal length of the optical imaging lens device and f3 is the focal length of the third lens.

10. 2. The optical imaging lens arrangement of claim 1, wherein the optical imaging lens arrangement satisfies the condition 1.30<F / f4<1.35, where F is the focal length of the optical imaging lens arrangement and f4 is the focal length of the fourth lens.

11. 2. The optical imaging lens arrangement of claim 1, wherein the optical imaging lens arrangement satisfies the condition -0.89<F / f5<-0.83, where F is the focal length of the optical imaging lens arrangement and f5 is the focal length of the fifth lens.

12. 2. The optical imaging lens device of claim 1, wherein the condition −0.80<fg2 / (R1+R2+R3+R4+R6+R7+R8+R9+R10)<−0.30 is satisfied, wherein 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, R6 is the radius of curvature of the object-side surface of the third lens, R7 is the combined radius of curvature of the image-side surface of the third lens and 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, and R10 is the radius of curvature of the image-side surface of the fifth lens.

13. 2. The optical imaging lens device of claim 1, wherein the condition −1.50<fg2 / (R6+R7+R8+R9+R10)<−0.80 is satisfied, wherein fg2 is the combined focal length of the second lens group, R6 is the radius of curvature of the object-side surface of the third lens, R7 is the combined radius of curvature of the image-side surface of the third lens and 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, and R10 is the radius of curvature of the image-side surface of the fifth lens.

14. 2. The optical imaging lens device of claim 1, wherein the condition −0.80<fg1 / (R1+R2+R3+R4+R6+R7+R8+R9+R10)<−0.60 is satisfied, wherein 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, R6 is the radius of curvature of the object-side surface of the third lens, R7 is the combined radius of curvature of the image-side surface of the third lens and 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, and R10 is the radius of curvature of the image-side surface of the fifth lens.

15. 2. The optical imaging lens device of claim 1, wherein the condition -1.60<fg1 / (R1+R2+R3+R4)<-1.50 is satisfied, 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, and R4 is the radius of curvature of the image-side surface of the second lens.

16. 2. The optical imaging lens device of claim 1, wherein the optical imaging lens device satisfies the condition -2.00< F / R1<-1.50, 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.

17. 2. The optical imaging lens device of claim 1, wherein the optical imaging lens device satisfies the condition -0.80< F / R2<-0.60, 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.

18. 2. The optical imaging lens device of claim 1, wherein the optical imaging lens device satisfies the condition 0.55<F / R3<0.65, where F is the focal length of the optical imaging lens device and R3 is the radius of curvature of the object-side surface of the second lens.

19. 2. The optical imaging lens device of claim 1, wherein the optical imaging lens device satisfies the condition -0.70< F / R4<-0.55, 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.

20. 2. The optical imaging lens device of claim 1, wherein the optical imaging lens device satisfies the condition 1.00<F / R6<1.60, where F is the focal length of the optical imaging lens device and R6 is the radius of curvature of the object-side surface of the third lens.

21. 2. The optical imaging lens device of claim 1, wherein the condition 1.90<F / R7<2.00 is satisfied, where F is the focal length of the optical imaging lens device, and R7 is the combined radius of curvature of the image-side surface of the third lens and the object-side surface of the fourth lens.

22. 2. The optical imaging lens device of claim 1, wherein the optical imaging lens device satisfies the condition -0.45< F / R8<-0.35, where F is the focal length of the optical imaging lens device and R8 is the radius of curvature of the image-side surface of the fourth lens.

23. 2. The optical imaging lens device of claim 1, wherein the optical imaging lens device satisfies the condition -2.95< F / R9<-2.75, where F is the focal length of the optical imaging lens device and R9 is the radius of curvature of the object-side surface of the fifth lens.

24. 2. The optical imaging lens device of claim 1, wherein the optical imaging lens device satisfies the condition −1.50< F / R10<−1.40, where F is the focal length of the optical imaging lens device and R10 is the radius of curvature of the image-side surface of the fifth lens.

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