Monocular imaging lens and 3D imaging lens

Abstract

The present application relates to a kind of monocular imaging lens and 3D imaging lens, successively including from object side to image side: first meniscus lens;Second meniscus lens, the concave surface of the first meniscus lens is oppositely arranged with the concave surface of the second meniscus lens;Diaphragm;Third meniscus lens, the convex surface of the third meniscus lens is oppositely arranged with the convex surface of the second meniscus lens;Fourth meniscus lens, the concave surface of the fourth meniscus lens is oppositely arranged with the concave surface of the third meniscus lens;And first compound lens;The first compound lens includes first double convex lens and fifth meniscus lens, the concave surface of the first double convex lens and the fifth meniscus lens are glued, and the first double convex 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 is f, the field of view angle of the monocular imaging lens is FOV, satisfies

Description

Technical Field

[0001] This invention relates to the field of lenses, and in particular to a monocular imaging lens group and a 3D imaging lens. Background Technology

[0002] With people's increasing demands for medical quality, the requirements for image quality, image distortion, and miniaturization of medical lenses are also constantly rising. However, existing medical lenses not only have complex structural designs and large sizes, but also generally poor image quality and significant image distortion, making them increasingly unable to meet the needs of medical applications. Summary of the Invention

[0003] Therefore, it is necessary to address the problems of large size, low image quality, and significant image distortion in existing surgical lenses by providing a monocular imaging lens assembly and a 3D imaging lens. This monocular imaging lens assembly and 3D imaging lens are designed with minimal distortion and can accurately reproduce the size and proportion information of lesions.

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

[0005] First crescent lens;

[0006] The second meniscus lens has the concave surface of the first meniscus lens and the concave surface of the second meniscus lens being positioned opposite each other.

[0007] Aperture;

[0008] The third meniscus lens has its convex surface facing the convex surface of the second meniscus lens.

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

[0010] First compound lens;

[0011] The first composite lens includes a first biconvex lens and a fifth meniscus lens, the first biconvex lens is cemented 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 group is f, and the field of view of the monocular imaging lens group is FOV, satisfying the following conditions:

[0013] The first meniscus lens of this 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 crescent lens has positive optical power.

[0019] The total optical length of the monocular imaging lens group described in this invention is TTL, which satisfies...

[0020] The focal length of the first meniscus lens of the present invention 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 described in this 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 The condition Vd3 ≥ 31.1 is satisfied, and Vd 51 ≥64.1, Vd 52 ≥31.2.

[0022] The refractive index of the first meniscus lens of this invention is Nd1, the refractive index of the third meniscus lens is Nd3, and the refractive index of the fifth meniscus lens is Nd2. 52 The following conditions must be met: Nd1 ≥ 1.76, Nd3 ≥ 1.66, and Nd 52 ≥1.89.

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

[0024] The first meniscus lens of this invention is an aspherical lens, while 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 aspherical surface of the first meniscus lens of the present invention satisfies Where z is the axial sagitta in the Z-direction of the aspherical surface, r is the height of the aspherical surface, c is the curvature of the fitted sphere, K is the fitted conic coefficient, and A, B, C, and D are the 4th, 6th, 8th, and 10th order coefficients of the aspherical surface polynomials, respectively.

[0026] A 3D imaging lens includes two monocular imaging lens groups arranged side by side, wherein the field of view of the 3D imaging lens is FOV', satisfying...

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

[0028] 1. The monocular imaging lens group and 3D imaging lens provided by the present invention have a maximum distortion of less than 6% in the field of view, and have good imaging reproduction of the subject.

[0029] 2. The monocular imaging lens group and 3D imaging lens provided by the present invention have an average MTF of over 0.5 across the entire field of view, and have good imaging quality.

[0030] 3. The lenses used in the monocular imaging lens group and 3D imaging lens provided by the present invention have a reasonable power distribution, are easy to process, have low cost, and have 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, which can reduce the wound area during the operation. Attached Figure Description

[0032] Figure 1 The optical path diagrams are shown for the monocular imaging lens group in Embodiments 1 and 2 of the present invention.

[0033] Figure 2 The optical path diagrams are shown for the 3D imaging lenses in Embodiments 1 and 2 of the present invention.

[0034] Figure 3 This is a graph showing the optical transfer function (MTF) curve of the 3D imaging lens in Embodiment 1 of the present invention under normal temperature conditions in the visible light band;

[0035] Figure 4 This is a dot plot of the 3D imaging lens in the visible light band in Embodiment 1 of the present invention;

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

[0037] Figure 6 This is a graph showing the optical transfer function (MTF) curve of the 3D imaging lens in Embodiment 2 of the present invention under normal temperature conditions in the visible light band;

[0038] Figure 7 This is a dot plot of the 3D imaging lens in the visible light band in Embodiment 2 of the present invention;

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

[0040] Figure label:

[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 plane; STO, Aperture stop. Detailed Implementation

[0042] To make the above-mentioned objects, features, and advantages of the present invention more apparent and understandable, specific embodiments of the present invention will be described in detail below with reference to the accompanying drawings. Many specific details are set forth in the following description to provide a thorough understanding of the present invention. However, the present invention can be practiced in many other ways different from those described herein, and those skilled in the art can make similar modifications without departing from the spirit of the present invention. Therefore, the present invention is not limited to the specific embodiments disclosed below.

[0043] In the description of this invention, it should be understood that the terms "center," "longitudinal," "lateral," "length," "width," "thickness," "upper," "lower," "front," "rear," "left," "right," "vertical," "horizontal," "top," "bottom," "inner," "outer," "clockwise," "counterclockwise," "axial," "radial," and "circumferential" indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings. They are used only for the convenience of describing this invention and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation. Therefore, they should not be construed as limitations on this invention.

[0044] Furthermore, the terms "first" and "second" are used for descriptive purposes only and should not be construed as indicating or implying relative importance or implicitly specifying the number of technical features indicated. Thus, a feature defined as "first" or "second" may explicitly or implicitly include at least one of that feature. In the description of this invention, "a plurality of" means at least two, such as two, three, etc., unless otherwise explicitly specified.

[0045] In this invention, unless otherwise explicitly specified and limited, the terms "installation," "connection," "linking," and "fixing," etc., should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral part; they can refer to a mechanical connection or an electrical connection; they can refer to a direct connection or an indirect connection through an intermediate medium; they can refer to the internal communication of two components or the interaction between two components, unless otherwise explicitly limited. Those skilled in the art can understand the specific meaning of the above terms in this invention according to the specific circumstances.

[0046] In this invention, unless otherwise explicitly specified and limited, "above" or "below" the second feature can mean that the first feature is in direct contact with the second feature, or that the first feature is in indirect contact with the second feature through an intermediate medium. Furthermore, "above," "over," and "on top" of the second feature can mean that the first feature is directly above or diagonally above the second feature, or simply that the first feature is at a higher horizontal level than the second feature. "Below," "below," and "under" the second feature can mean that the first feature is directly below or diagonally below the second feature, or simply that the first feature is at a lower horizontal level than the second feature.

[0047] It should be noted that when an element is referred to as being "fixed to" or "set on" another element, it can be directly on the other element or there may be an intervening element. When an element is considered to be "connected to" another element, it can be directly connected to the other element or there may be an intervening element. The terms "vertical," "horizontal," "upper," "lower," "left," "right," and similar expressions used herein are for illustrative purposes only and do not represent the only possible implementation.

[0048] Example 1:

[0049] See 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 stop STO, a third meniscus lens G3, a fourth meniscus lens G4, a first compound lens G5, a color filter G6, and an imaging surface G7.

[0050] The concave surfaces of the first meniscus lens G1 and the second meniscus lens G2 are positioned opposite each other along the optical axis.

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

[0052] The concave surfaces of the third meniscus lens G3 and the fourth meniscus lens G4 are opposite to each other along the optical axis and are spaced apart.

[0053] The first compound lens G5 includes a first biconvex lens G51 and a fifth meniscus lens G52, with the concave surfaces of the first biconvex lens G51 and the fifth meniscus lens G52 cemented 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 also 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, while 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 aspherical surface of the first meniscus lens G1 satisfies

[0061] Where z is the axial sagitta in the Z-direction of the aspherical surface, r is the height of the aspherical surface, c is the curvature of the fitted sphere, K is the fitted conic coefficient, and A, B, C, and D are the 4th, 6th, 8th, and 10th order coefficients of the aspherical 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] Wherein, the focal length of the first compound 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 the following conditions: In this embodiment, f5 = 12.45 mm and f = 2.01 mm.

[0065] The total optical length of the monocular imaging lens group is TTL, which satisfies 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=-2.51mm and f2=8.96mm.

[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 crescent lens G52 is Vd.52 The condition Vd3 ≥ 31.1 is satisfied, and 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 The following conditions must be met: Nd1 ≥ 1.76, Nd3 ≥ 1.66, and 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 group is 5.1, the maximum diameter of the monocular imaging lens group is 3.34 mm, and the image plane size Ф = 3.2 mm.

[0070] See Figure 2 This embodiment also provides a 3D imaging lens, comprising two monocular imaging lens groups arranged side-by-side. Assembling the two monocular imaging lens groups into a 3D imaging lens does not change the magnification; therefore, the focal length of the 3D imaging lens is equal to the focal length of the monocular imaging lens groups, both being f. The field of view of the 3D imaging lens and the monocular imaging lens groups are slightly different, with the 3D imaging lens having a field of view of FOV', satisfying... In this embodiment, FOV' = 80°.

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

[0072] See Figure 4 In this embodiment, the 3D imaging lens has a small and concentrated light spot radius, resulting in better aberrations and coma.

[0073] Field curvature, also known as "image field curvature," occurs when the image formed by a lens group does not coincide with the ideal image point. Although a sharp 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. Meridian field curvature data is measured along the Z-axis from the currently determined focal plane to the paraxial focal plane, and is measured on the meridional (YZ plane). Sagittal field curvature data measures the distance on a plane perpendicular to the meridional plane. The baseline in the diagram is on the optical axis, and the top of the curve represents the maximum field of view (angle or height). No units are set on the vertical axis because the curve is always normalized using the maximum radial field of view.

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

[0075] See Figure 5 In this embodiment, the 3D imaging lens distortion is -6%, which is excellent and can effectively suppress imaging distortion. Therefore, it can accurately restore the size and proportion information of the lesion during surgery and reduce visual errors during the operation.

[0076] Example 2:

[0077] See 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 stop STO, a third meniscus lens G3, a fourth meniscus lens G4, a first compound lens G5, a color filter G6, and an imaging surface G7.

[0078] The concave surfaces of the first meniscus lens G1 and the second meniscus lens G2 are positioned opposite each other along the optical axis.

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

[0080] The concave surfaces of the third meniscus lens G3 and the fourth meniscus lens G4 are opposite to each other along the optical axis and are spaced apart.

[0081] The first compound lens G5 includes a first biconvex lens G51 and a fifth meniscus lens G52, with the concave surfaces of the first biconvex lens G51 and the fifth meniscus lens G52 cemented 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 also 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, while 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 aspherical surface of the first meniscus lens G1 satisfies Where z is the axial sagitta in the Z-direction of the aspherical surface, r is the height of the aspherical surface, c is the curvature of the fitted sphere, K is the fitted conic coefficient, and A, B, C, and D are the 4th, 6th, 8th, and 10th order coefficients of the aspherical 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] Wherein, the focal length of the first compound 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 the following conditions: In this embodiment, f5 = 9.26 mm and f = 2.00 mm.

[0091] The total optical length of the monocular imaging lens group is TTL, which satisfies 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=-1.97mm and f2=4.32mm.

[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 crescent lens G52 is Vd. 52 The condition Vd3 ≥ 31.1 is satisfied, and 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 The following conditions must be met: Nd1 ≥ 1.76, Nd3 ≥ 1.66, and 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 group is 5.1, the maximum diameter of the monocular imaging lens group is 3.4 mm, and the image plane size Ф = 3.2 mm.

[0096] See Figure 2 This embodiment also provides a 3D imaging lens, comprising two monocular imaging lens groups arranged side-by-side. Assembling the two monocular imaging lens groups into a 3D imaging lens does not change the magnification; therefore, the focal length of the 3D imaging lens is equal to the focal length of the monocular imaging lens groups, both being f. The field of view of the 3D imaging lens and the monocular imaging lens groups are slightly different, with the 3D imaging lens having a field of view of FOV', satisfying... In this embodiment, FOV' = 80°.

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

[0098] See Figure 7In this embodiment, the 3D imaging lens also has a small and concentrated spot radius, resulting in better aberrations and coma.

[0099] See Figure 8 In this embodiment, the distortion of the 3D imaging lens is also -6%, which is excellent and can effectively suppress the distortion of the image. Therefore, it can restore the size and proportion information of the lesion well during the operation and reduce visual errors during the operation.

[0100] The technical features of the above embodiments can be combined in any way. For the sake of brevity, not all possible combinations of the technical features in the above 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 embodiments described above are merely illustrative of several implementations of the present invention, and while the descriptions are relatively specific and detailed, they should not be construed as limiting the scope of the invention patent. It should be noted that those skilled in the art can make various modifications and improvements without departing from the concept of the present invention, and these all fall within the protection scope of the present invention. Therefore, the protection scope of this invention patent should be determined by the appended claims.

Claims

1. A monocular imaging lens assembly, characterized in that, From the object side to the image side, it consists of a first meniscus lens (G1), a second meniscus lens (G2), an aperture stop (STO), a third meniscus lens (G3), a fourth meniscus lens (G4), and a first compound lens (G5). The first meniscus lens (G1) has negative optical power, and the second meniscus lens (G2) has positive optical power; 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; The convex surface of the third meniscus lens (G3) is disposed opposite to the convex surface of the second meniscus lens (G2), and the third meniscus lens (G3) has negative optical power; The concave surface of the fourth meniscus lens (G4) is disposed opposite to the concave surface of the third meniscus lens (G3), and the fourth meniscus lens (G4) has positive optical power. The first composite lens (G5) includes a first biconvex lens (G51) and a fifth meniscus lens (G52). The first biconvex lens (G51) and the fifth meniscus lens (G52) are cemented together on their concave surfaces, and the first biconvex lens (G51) is located between the fourth meniscus lens (G4) and the fifth meniscus lens (G52). The first biconvex lens (G51) has negative optical power; the fifth meniscus lens (G52) has positive optical power. Wherein, 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 the following conditions: .

2. The monocular imaging lens assembly according to claim 1, characterized in that, The total optical length of the monocular imaging lens group is TTL, satisfying... .

3. 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.

4. 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 The condition Vd3 ≥ 31.1 is satisfied, and Vd 51 ≥64.1, Vd 52 ≥31.

2.

5. The monocular imaging lens assembly according to claim 1, characterized in that, The first meniscus lens (G1) has a refractive index of Nd1, the third meniscus lens (G3) has a refractive index of Nd3, and the fifth meniscus lens (G52) has a refractive index of Nd2. 52 The following conditions must be met: Nd1 ≥ 1.76, Nd3 ≥ 1.66, and Nd 52 ≥1.

89.

6. The monocular imaging lens assembly according to claim 1, characterized in that, The monocular imaging lens group also includes a color filter (G6) and an imaging surface (G7), wherein the color filter (G6) is located between the imaging surface (G7) and the first compound lens (G5).

7. The monocular imaging lens assembly according to claim 1, characterized in that, The first meniscus lens (G1) is an aspherical lens, while 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.

8. The monocular imaging lens assembly according to claim 7, characterized in that, The aspherical surface of the first meniscus lens (G1) satisfies Where z is the axial sagitta in the Z-direction of the non-spherical surface, r is the height of the non-spherical surface, c is the curvature of the fitted sphere, K is the fitted conic coefficient, and A, B, C, and D are the 4th, 6th, 8th, and 10th order coefficients of the non-spherical surface polynomial, respectively.

9. A 3D imaging lens, characterized in that, It includes two monocular imaging lens groups arranged side by side as described in any one of claims 1-8, wherein the field of view of the 3D imaging lens is... ,satisfy .

Images