Monocular imaging lens group and 3D imaging lens

Abstract

The invention relates to a monocular imaging lens group and a 3D imaging lens. From an object side to an image side, the monocular imaging lens group comprises a first meniscus lens; the concave surface of the first meniscus lens is opposite to the concave surface of the second meniscus lens; a diaphragm; the convex surface of the third meniscus lens is opposite to the convex surface of the second meniscus lens; the concave surface of the fourth meniscus lens is opposite to the concave surface of the third meniscus lens; and a first compound lens; the first compound lens comprises a first biconvex lens and a fifth meniscus lens, the first biconvex lens is glued with the concave surface of the fifth meniscus lens, and the first biconvex lens is located between the fourth meniscus lens and the fifth meniscus lens; wherein the focal length of the first compound lens is f5, the focal length of the monocular imaging lens group is f, the field angle of view of the monocular imaging lens group is FOV, and # imgabs0 # is met.

Description

Technical Field

[0001] The present invention relates to the field of lenses, and in particular to a monocular imaging lens assembly and a 3D imaging lens. Background Art

[0002] As people's requirements for medical quality continue to increase, the requirements for medical lens image quality, image distortion and miniaturization are also increasing. However, existing medical lenses are not only complex in structure design and large in size, but also have average image quality and large image distortion, making it increasingly difficult to meet the needs of medical scenarios. Summary of the invention

[0003] Based on this, it is necessary to provide a monocular imaging lens set and a 3D imaging lens to address the problems of large size, low imaging quality and large imaging distortion of existing surgical lenses. The monocular imaging lens set and the 3D imaging lens are designed with small distortion and distortion, and can well restore the size ratio information of the lesion.

[0004] A monocular imaging lens assembly, comprising, from the object side to the image side, the following:

[0005] First Meniscus Lens;

[0006] a second meniscus lens, wherein the concave surface of the first meniscus lens is arranged opposite to the concave surface of the second meniscus lens;

[0007] Aperture;

[0008] a third meniscus lens, wherein a convex surface of the third meniscus lens is arranged opposite to a convex surface of the second meniscus lens;

[0009] a fourth meniscus lens, wherein the concave surface of the fourth meniscus lens is arranged opposite to the concave surface of the third meniscus lens; and

[0010] a first compound lens;

[0011] The first composite lens includes a first biconvex lens and a fifth meniscus lens, the first biconvex lens is glued to the concave surface of the fifth meniscus lens, and the first biconvex lens is located between the fourth meniscus lens and the fifth meniscus lens;

[0012] Wherein, the focal length of the first composite lens is f5, the focal length of the monocular imaging lens assembly is f, the field of view angle of the monocular imaging lens assembly is FOV, and

[0013] The first meniscus lens of the present invention has negative optical power;

[0014] The second meniscus lens has positive optical power;

[0015] The third meniscus lens has negative optical power;

[0016] The fourth meniscus lens has positive optical power;

[0017] The first biconvex lens has negative optical power;

[0018] The fifth meniscus lens has positive optical power.

[0019] The total optical length of the monocular imaging lens assembly of the present invention is TTL, which satisfies

[0020] In the present invention, the focal length of the first meniscus lens is f1, and the focal length of the second meniscus lens is f2, satisfying f1≥-2.51, f2≥4.32, and f5≥9.26.

[0021] The Abbe number of the third meniscus lens of the present invention is Vd3, and the Abbe number of the first biconvex lens is Vd 51 , the Abbe number of the fifth meniscus lens is Vd 52 , meet Vd3≥31.1, Vd 51 ≥64.1, Vd 52 ≥31.2.

[0022] The refractive index of the first meniscus lens of the present invention is Nd1, the refractive index of the third meniscus lens is Nd3, and the refractive index of the fifth meniscus lens is Nd 52 , satisfying Nd1≥1.76, Nd3≥1.66, Nd 52 ≥1.89.

[0023] The monocular imaging lens assembly of the present invention further comprises a color filter and an imaging surface, wherein the color filter is located between the imaging surface and the first composite lens.

[0024] The first meniscus lens of the present invention is an aspherical lens, and the second meniscus lens, the third meniscus lens, the fourth meniscus lens, the first biconvex lens and the fifth meniscus lens are all spherical lenses.

[0025] The aspheric surface of the first meniscus lens of the present invention satisfies Among them, z is the axial vector height of the aspheric surface in the Z direction, r is the height of the aspheric surface, c is the curvature of the fitted spherical surface, K is the fitted cone coefficient, and A, B, C, and D are the 4th, 6th, 8th, and 10th order coefficients of the aspheric surface multi-terms respectively.

[0026] A 3D imaging lens, comprising two monocular imaging lens assemblies arranged side by side, wherein the field of view of the 3D imaging lens is FOV', and satisfies

[0027] The present invention has the following technical effects:

[0028] 1. The monocular imaging lens set and 3D imaging lens provided by the present invention have a maximum distortion in the field of view controlled within 6%, and have good imaging restoration performance for the subject.

[0029] 2. The monocular imaging lens set and 3D imaging lens provided by the present invention have an average MTF value of more than 0.5 for the entire field of view and have good imaging quality.

[0030] 3. The lenses used in the monocular imaging lens set and 3D imaging lens provided by the present invention have reasonable focal power distribution, easy shape to process, low cost, and good chromatic aberration correction;

[0031] 4. The outer diameter of the monocular imaging lens group provided by the present invention is limited to within 3.4 mm, and the outer diameter of the 3D imaging lens (including wall thickness) is limited to within 7.6 mm. Compared with the prior art, the volume is significantly reduced, and the wound area can be reduced during surgery. BRIEF DESCRIPTION OF THE DRAWINGS

[0032] Figure 1 1 is a light path diagram of the monocular imaging lens assembly in Embodiment 1 and Embodiment 2 of the present invention;

[0033] Figure 2 3D imaging lens in Embodiment 1 and Embodiment 2 of the present invention;

[0034] Figure 3 is an optical transfer function (MTF) curve of the 3D imaging lens in Example 1 of the present invention at room temperature in the visible light band;

[0035] Figure 4 is a point diagram of the 3D imaging lens in the visible light band in Example 1 of the present invention;

[0036] Figure 5 Graphs showing field curvature and distortion of the 3D imaging lens in the visible light band in Embodiment 1 of the present invention;

[0037] Figure 6 is an optical transfer function (MTF) curve of the 3D imaging lens in Example 2 of the present invention at room temperature in the visible light band;

[0038] Figure 7 is a point diagram of the 3D imaging lens in the visible light band in Example 2 of the present invention;

[0039] Figure 8 Graphs showing field curvature and distortion of the 3D imaging lens in the visible light band in Embodiment 2 of the present invention.

[0040] Reference numerals:

[0041] G1, first meniscus lens; G2, second meniscus lens; G3, third meniscus lens; G4, fourth meniscus lens; G5, first compound lens; G51, first biconvex lens; G52, fifth meniscus lens; G6, color filter; G7, imaging surface; STO, aperture. DETAILED DESCRIPTION

[0042] In order to make the above-mentioned objects, features and advantages of the present invention more obvious and easy to understand, the specific embodiments of the present invention are described in detail below in conjunction with the accompanying drawings. In the following description, many specific details are set forth to facilitate a full understanding of the present invention. However, the present invention can be implemented in many other ways different from those described herein, and those skilled in the art can make similar improvements without violating the connotation of the present invention, so the present invention is not limited by the specific embodiments disclosed below.

[0043] In the description of the present invention, it is to be understood that the terms “center”, “longitudinal”, “lateral”, “length”, “width”, “thickness”, “up”, “down”, “front”, “back”, “left”, “right”, “vertical”, “horizontal”, “top”, “bottom”, “inside”, “outside”, “clockwise”, “counterclockwise”, “axial”, “radial”, “circumferential”, etc., indicating orientations or positional relationships are based on the orientations or positional relationships shown in the accompanying drawings, and are only for the convenience of describing the present invention and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore should not be understood as limiting the present invention.

[0044] In addition, the terms "first" and "second" are used for descriptive purposes only and should not be understood as indicating or implying relative importance or implicitly indicating the number of the indicated technical features. Therefore, the features defined as "first" and "second" may explicitly or implicitly include at least one of the features. In the description of the present invention, the meaning of "plurality" is at least two, such as two, three, etc., unless otherwise clearly and specifically defined.

[0045] In the present invention, unless otherwise clearly specified and limited, the terms "installed", "connected", "connected", "fixed" and the like should be understood in a broad sense, for example, it can be a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection or an electrical connection; it can be a direct connection or an indirect connection through an intermediate medium, it can be the internal connection of two elements or the interaction relationship between two elements, unless otherwise clearly defined. For ordinary technicians in this field, the specific meanings of the above terms in the present invention can be understood according to specific circumstances.

[0046] In the present invention, unless otherwise clearly specified and limited, a first feature being "above" or "below" a second feature may mean that the first and second features are in direct contact, or the first and second features are in indirect contact through an intermediate medium. Moreover, a first feature being "above", "above" or "above" a second feature may mean that the first feature is directly above or obliquely above the second feature, or simply means that the first feature is higher in level than the second feature. A first feature being "below", "below" or "below" a second feature may mean that the first feature is directly below or obliquely below the second feature, or simply means that the first feature is lower in level than the second feature.

[0047] It should be noted that when an element is referred to as being "fixed to" or "disposed on" another element, it may be directly on the other element or there may be a central element. When an element is considered to be "connected to" another element, it may be directly connected to the other element or there may be a central element at the same time. The terms "vertical", "horizontal", "upper", "lower", "left", "right" and similar expressions used herein are for illustrative purposes only and are not intended to be the only implementation method.

[0048] Embodiment 1:

[0049] See also Figure 1 This embodiment provides a monocular imaging lens assembly, which includes, from the object side to the image side, a first meniscus lens G1, a second meniscus lens G2, an aperture STO, a third meniscus lens G3, a fourth meniscus lens G4, a first composite lens G5, a color filter G6 and an imaging surface G7.

[0050] The concave surface of the first meniscus lens G1 and the concave surface of the second meniscus lens G2 are arranged opposite to each other in the optical axis direction.

[0051] The convex surface of the third meniscus lens G3 and the convex surface of the second meniscus lens G2 are arranged opposite to each other in the optical axis direction, and the convex surface of the third meniscus lens G3 and the convex surface of the second meniscus lens G2 are both arranged to be spaced apart from the aperture STO.

[0052] The concave surface of the third meniscus lens G3 and the concave surface of the fourth meniscus lens G4 are opposed to each other in the optical axis direction and are spaced apart from each other.

[0053] The first composite lens G5 includes a first biconvex lens G51 and a fifth meniscus lens G52, and the concave surfaces of the first biconvex lens G51 and the fifth meniscus lens G52 are glued together. The first biconvex lens G51 is located between the fourth meniscus lens G4 and the fifth meniscus lens G52, and the fifth meniscus lens G52 is located between the first biconvex lens G51 and the color filter G6. The fourth meniscus lens G4 and the first biconvex lens G51 are spaced apart, and the fifth meniscus lens G52 and the color filter G6 are spaced apart.

[0054] More specifically, in this embodiment, the first meniscus lens G1 has negative optical power, the second meniscus lens G2 has positive optical power, the third meniscus lens G3 has negative optical power, the fourth meniscus lens G4 has positive optical power, the first biconvex lens G51 has negative optical power, and the fifth meniscus lens G52 has positive optical power.

[0055] The specific structural parameters of the monocular imaging lens group are shown in Table 1.

[0056] Table 1

[0057]

[0058]

[0059] In this embodiment, the first meniscus lens G1 is an aspherical lens, and the second meniscus lens G2, the third meniscus lens G3, the fourth meniscus lens G4, the first biconvex lens G51 and the fifth meniscus lens G52 are all spherical lenses.

[0060] The aspheric surface of the first meniscus lens G1 satisfies

[0061] Wherein, z is the axial vector height of the aspheric Z direction, r is the height of the aspheric surface, c is the curvature of the fitted spherical surface, K is the fitted cone coefficient, and A, B, C, and D are the high-order coefficients of the 4th, 6th, 8th, and 10th order of the aspheric surface multi-terms respectively. The specific structural parameters of the first meniscus lens G1 in this embodiment are shown in Table 2.

[0062] Table 2

[0063] Mirror number A B C D 1 0.0373 -0.0110 -0.0026 0.0004 2 0.0433 0.0570 -0.0962 -0.0049

[0064] Among them, the focal length of the first composite lens G5 is f5, the focal length of the monocular imaging lens group is f, and the field of view of the monocular imaging lens group is FOV, satisfying In this embodiment, f5=12.45 mm, f=2.01 mm.

[0065] The total optical length of the monocular imaging lens group is TTL, which meets In this embodiment, TTL = 25.24 mm,

[0066] The focal length of the first meniscus lens G1 is f1, and the focal length of the second meniscus lens G2 is f2, satisfying f1≥-2.51, f2≥4.32, and f5≥9.26. In this embodiment, f1=-2.51 mm, and f2=8.96 mm.

[0067] The Abbe number of the third meniscus lens G3 is Vd3, and the Abbe number of the first biconvex lens G51 is Vd 51 , the Abbe number of the fifth meniscus lens G52 is Vd52 , meet Vd3≥31.1, Vd 51 ≥64.1, Vd 52 ≥31.2. In this embodiment, Vd3=47.1, Vd 51 =64.2, Vd 52 =31.3.

[0068] The refractive index of the first meniscus lens G1 is Nd1, the refractive index of the third meniscus lens G3 is Nd3, and the refractive index of the fifth meniscus lens G52 is Nd 52 , satisfying Nd1≥1.76, Nd3≥1.66, Nd 52 ≥1.89. In this embodiment, Nd1=1.77, Nd3=1.67, Nd 52 =1.9.

[0069] In this embodiment, the aperture value of the monocular imaging lens assembly is 5.1, the maximum diameter of the monocular imaging lens assembly is 3.34 mm, and the image plane size Φ=3.2 mm.

[0070] See also Figure 2 This embodiment also provides a 3D imaging lens, comprising two monocular imaging lens assemblies arranged side by side. The two monocular imaging lens assemblies are assembled into a 3D imaging lens without changing the magnification, so the focal length of the 3D imaging lens is equal to the focal length of the monocular imaging lens assembly, both of which are f. The field of view of the 3D imaging lens and the monocular imaging lens assembly are slightly different, wherein the field of view of the 3D imaging lens is FOV', which satisfies In this embodiment, FOV'=80°,

[0071] See also Figure 3 The MTF curve of the 3D imaging lens in this embodiment is relatively smooth and concentrated, and the average MTF value of the full field of view (half image height Y'=1.6mm) reaches above 0.5, indicating that the 3D imaging lens has high imaging quality and has well corrected various aberrations (such as spherical aberration, coma, astigmatism, field curvature, axial chromatic aberration, vertical axis chromatic aberration, etc.).

[0072] See also Figure 4 The spot radius of the 3D imaging lens of this embodiment is small and concentrated, and the corresponding aberration and coma are better.

[0073] Field curvature is also called "image field curvature". When the imaging of the lens group has field curvature, the intersection point of the entire light beam does not coincide with the ideal image point. Although a clear image point can be obtained at each specific point, the entire image plane is a curved surface. The field curvature curve shows the distance from the current focal plane or image plane to the paraxial focal plane as a function of the field of view coordinates. The meridian field curvature data is the distance from the currently determined focal plane to the paraxial focal plane measured along the Z axis, and is measured on the meridian (YZ plane). The sagittal field curvature data measures the distance measured on a plane perpendicular to the meridian plane. The baseline in the schematic diagram is on the optical axis, and the top of the curve represents the maximum field of view (angle or height). No unit is set on the vertical axis because the curve is always normalized with the maximum radial field of view.

[0074] Lens distortion is a general term for the inherent perspective distortion of optical lenses, that is, the distortion caused by perspective. This distortion is very detrimental to the imaging quality of the photo. Since it is an inherent characteristic of the lens (convex lenses converge light and concave lenses diverge light), it cannot be eliminated but can only be improved.

[0075] See also Figure 5 In this embodiment, the distortion of the 3D imaging lens is -6%, which is well controlled and can well suppress the distortion of the imaging. Therefore, the lesion size ratio information can be well restored during the operation, reducing the visual error during the operation.

[0076] Embodiment 2:

[0077] See also Figure 1 This embodiment provides a monocular imaging lens assembly, which includes, from the object side to the image side, a first meniscus lens G1, a second meniscus lens G2, an aperture STO, a third meniscus lens G3, a fourth meniscus lens G4, a first composite lens G5, a color filter G6 and an imaging surface G7.

[0078] The concave surface of the first meniscus lens G1 and the concave surface of the second meniscus lens G2 are arranged opposite to each other in the optical axis direction.

[0079] The convex surface of the third meniscus lens G3 and the convex surface of the second meniscus lens G2 are arranged opposite to each other in the optical axis direction, and the convex surface of the third meniscus lens G3 and the convex surface of the second meniscus lens G2 are both arranged to be spaced apart from the aperture STO.

[0080] The concave surface of the third meniscus lens G3 and the concave surface of the fourth meniscus lens G4 are opposed to each other in the optical axis direction and are spaced apart from each other.

[0081] The first composite lens G5 includes a first biconvex lens G51 and a fifth meniscus lens G52, and the concave surfaces of the first biconvex lens G51 and the fifth meniscus lens G52 are glued together. The first biconvex lens G51 is located between the fourth meniscus lens G4 and the fifth meniscus lens G52, and the fifth meniscus lens G52 is located between the first biconvex lens G51 and the color filter G6. The fourth meniscus lens G4 and the first biconvex lens G51 are spaced apart, and the fifth meniscus lens G52 and the color filter G6 are spaced apart.

[0082] More specifically, in this embodiment, the first meniscus lens G1 has negative optical power, the second meniscus lens G2 has positive optical power, the third meniscus lens G3 has negative optical power, the fourth meniscus lens G4 has positive optical power, the first biconvex lens G51 has negative optical power, and the fifth meniscus lens G52 has positive optical power.

[0083] The specific structural parameters of the monocular imaging lens group are shown in Table 3.

[0084] Table 3

[0085]

[0086] In this embodiment, the first meniscus lens G1 is an aspherical lens, and the second meniscus lens G2, the third meniscus lens G3, the fourth meniscus lens G4, the first biconvex lens G51 and the fifth meniscus lens G52 are all spherical lenses.

[0087] The aspheric surface of the first meniscus lens G1 satisfies Wherein, z is the axial vector height of the aspheric Z direction, r is the height of the aspheric surface, c is the curvature of the fitted spherical surface, K is the fitted cone coefficient, and A, B, C, and D are the high-order coefficients of the 4th, 6th, 8th, and 10th orders of the aspheric surface multiple terms, respectively. The specific structural parameters of the first meniscus lens G1 in this embodiment are shown in Table 4.

[0088] Table 4

[0089] Mirror number A B C D 1 0.043 -0.038 0.006 0.000 2 0.136 -0.017 -0.155 0.069

[0090] Among them, the focal length of the first composite lens G5 is f5, the focal length of the monocular imaging lens group is f, and the field of view of the monocular imaging lens group is FOV, satisfying In this embodiment, f5=9.26 mm, f=2.00 mm.

[0091] The total optical length of the monocular imaging lens group is TTL, which meets In this embodiment, TTL=23mm,

[0092] The focal length of the first meniscus lens G1 is f1, and the focal length of the second meniscus lens G2 is f2, satisfying f1≥-2.51, f2≥4.32, and f5≥9.26. In this embodiment, f1=-1.97 mm, and f2=4.32 mm.

[0093] The Abbe number of the third meniscus lens G3 is Vd3, and the Abbe number of the first biconvex lens G51 is Vd 51 , the Abbe number of the fifth meniscus lens G52 is Vd 52 , meet Vd3≥31.1, Vd 51 ≥64.1, Vd 52 ≥31.2. In this embodiment, Vd3=31.2, Vd 51 =64.2, Vd 52 =31.3.

[0094] The refractive index of the first meniscus lens G1 is Nd1, the refractive index of the third meniscus lens G3 is Nd3, and the refractive index of the fifth meniscus lens G52 is Nd 52 , satisfying Nd1≥1.76, Nd3≥1.66, Nd 52 ≥1.89. In this embodiment, Nd1=1.77, Nd3=1.67, Nd 52 =1.9.

[0095] In this embodiment, the aperture value of the monocular imaging lens assembly is 5.1, the maximum diameter of the monocular imaging lens assembly is 3.4 mm, and the image plane size Φ=3.2 mm.

[0096] See also Figure 2 This embodiment also provides a 3D imaging lens, comprising two monocular imaging lens assemblies arranged side by side. The two monocular imaging lens assemblies are assembled into a 3D imaging lens without changing the magnification, so the focal length of the 3D imaging lens is equal to the focal length of the monocular imaging lens assembly, both of which are f. The field of view of the 3D imaging lens and the monocular imaging lens assembly are slightly different, wherein the field of view of the 3D imaging lens is FOV', which satisfies In this embodiment, FOV'=80°,

[0097] See also Figure 6 The MTF curve of the 3D imaging lens in this embodiment is also relatively smooth and concentrated, and the average MTF value of the full field of view (half image height Y'=1.6mm) is above 0.5, indicating that the 3D imaging lens in this embodiment has the same high imaging quality as that in Example 1, and has well corrected various aberrations (such as spherical aberration, coma, astigmatism, field curvature, axial chromatic aberration, vertical chromatic aberration, etc.).

[0098] See also Figure 7The spot radius of the 3D imaging lens of this embodiment is also small and concentrated, and the corresponding aberration and coma are better.

[0099] See also Figure 8 The distortion of the 3D imaging lens in this embodiment is also -6%, which is very well controlled and can well suppress the distortion of the imaging. Therefore, the lesion size ratio information can be well restored during the operation, reducing the visual error during the operation.

[0100] The technical features of the above-described embodiments may be arbitrarily combined. To make the description concise, not all possible combinations of the technical features in the above-described embodiments are described. However, as long as there is no contradiction in the combination of these technical features, they should be considered to be within the scope of this specification.

[0101] The above-mentioned embodiments only express several implementation methods of the present invention, and the descriptions thereof are relatively specific and detailed, but they cannot be understood as limiting the scope of the invention patent. It should be pointed out that, for ordinary technicians in this field, several variations and improvements can be made without departing from the concept of the present invention, and these all belong to the protection scope of the present invention. Therefore, the protection scope of the patent of the present invention shall be subject to the attached claims.

Claims

1. A monocular imaging lens assembly, characterized in that: From the object side to the image side, it includes: First meniscus lens (G1); a second meniscus lens (G2), wherein the concave surface of the first meniscus lens (G1) and the concave surface of the second meniscus lens (G2) are arranged opposite to each other; Aperture (STO); a third meniscus lens (G3), wherein the convex surface of the third meniscus lens (G3) is arranged opposite to the convex surface of the second meniscus lens (G2); a fourth meniscus lens (G4), wherein the concave surface of the fourth meniscus lens (G4) is arranged opposite to the concave surface of the third meniscus lens (G3); and a first compound lens (G5); The first composite lens (G5) comprises a first biconvex lens (G51) and a fifth meniscus lens (G52), wherein the first biconvex lens (G51) is glued to a concave surface of the fifth meniscus lens (G52), and the first biconvex lens (G51) is located between the fourth meniscus lens (G4) and the fifth meniscus lens (G52); The focal length of the first composite lens (G5) is f5, the focal length of the monocular imaging lens assembly is f, the field of view of the monocular imaging lens assembly is FOV, and the 2. The monocular imaging lens assembly according to claim 1, characterized in that: The first meniscus lens (G1) has negative optical power; The second meniscus lens (G2) has positive optical power; The third meniscus lens (G3) has negative optical power; The fourth meniscus lens (G4) has positive optical power; The first biconvex lens (G51) has negative optical power; The fifth meniscus lens (G52) has positive optical power.

3. The monocular imaging lens assembly according to claim 1, characterized in that: The total optical length of the monocular imaging lens assembly is TTL, satisfying 4. The monocular imaging lens assembly according to claim 1, characterized in that: The focal length of the first meniscus lens (G1) is f1, and the focal length of the second meniscus lens (G2) is f2, satisfying f1≥-2.51, f2≥4.32, and f5≥9.

26.

5. The monocular imaging lens assembly according to claim 1, characterized in that: The Abbe number of the third meniscus lens (G3) is Vd3, and the Abbe number of the first biconvex lens (G51) is Vd 51 The Abbe number of the fifth meniscus lens (G52) is Vd 52 , meet Vd3≥31.1, Vd 51 ≥64.1, Vd 52 ≥31.

2.

6. The monocular imaging lens assembly according to claim 1, characterized in that: The refractive index of the first meniscus lens (G1) is Nd1, the refractive index of the third meniscus lens (G3) is Nd3, and the refractive index of the fifth meniscus lens (G52) is Nd 52 , satisfying Nd1≥1.76, Nd3≥1.66, Nd 52 ≥1.

89.

7. The monocular imaging lens assembly according to claim 1, characterized in that: The monocular imaging lens assembly further comprises a color filter (G6) and an imaging surface (G7), wherein the color filter (G6) is located between the imaging surface (G7) and the first composite lens (G5).

8. The monocular imaging lens assembly according to claim 1, characterized in that: The first meniscus lens (G1) is an aspherical lens, and the second meniscus lens (G2), the third meniscus lens (G3), the fourth meniscus lens (G4), the first biconvex lens (G51) and the fifth meniscus lens (G52) are all spherical lenses.

9. The monocular imaging lens assembly according to claim 8, characterized in that: The aspheric surface of the first meniscus lens (G1) satisfies Among them, z is the axial vector height of the aspheric surface in the Z direction, r is the height of the aspheric surface, c is the curvature of the fitted spherical surface, K is the fitted cone coefficient, and A, B, C, and D are the 4th, 6th, 8th, and 10th order coefficients of the aspheric surface multi-terms respectively.

10. A 3D imaging lens, characterized in that: The invention comprises two monocular imaging lens assemblies according to any one of claims 1 to 9 arranged side by side, wherein the field of view of the 3D imaging lens is FOV', and satisfies

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