A high-resolution lens and optical system for AR, VR glasses detection

Abstract

The application provides a high-resolution lens and optical system for AR and VR glasses detection, and is applied to the technical field of optical lenses. A front light barrier and a lens module are sequentially arranged along an optical axis from an object side to an image side. The lens module comprises: a first group with positive focal power, a second group with positive focal power, a third group with positive focal power, a fourth group with positive focal power, and a fifth group with positive focal power. The focal lengths of the groups satisfy the following conditions: -3 < f Q1 / f < 0; -3 < f Q2 / f < 0; -6 < f Q3 / f < -3; -4 < f Q4 / f < -1; -2000 < f Q5 / f < -1800; wherein f represents the effective focal length of the high-resolution lens, f Q1 f1 represents the effective focal length of the first group, f Q2 f2 represents the effective focal length of the second group, f Q3 f3 represents the effective focal length of the third group, f Q4 f4 represents the effective focal length of the fourth group, and f Q5 f5 represents the effective focal length of the fifth group.

Description

Technical Field

[0001] This invention belongs to the field of optical lens technology, specifically relating to a high-resolution lens and optical system for AR and VR glasses detection. Background Technology

[0002] With the advent of the intelligent era, the development and application of machine vision technology are becoming increasingly widespread. However, with the continuous development of AR / VR technology and applications, the market demands for AR / VR glasses are constantly increasing, leading to their widespread application in many fields such as gaming, social networking, and education.

[0003] Most existing AR / VR glasses have low resolution and a small field of view, which limits their ability to simulate human vision and makes it difficult to meet the application requirements of high-end AR / VR inspection equipment on the market. Simulating the human eye presents significant challenges for high-resolution ultra-wide-angle systems compared to other AR / VR glasses inspection lenses, both in terms of design and assembly. Furthermore, designing a long working distance under short focal length conditions also presents considerable challenges. The large field of view and short working distance lead to many difficulties during use, resulting in darker environments and lower image quality. Therefore, achieving high image quality and a simulated human eye's field of view in challenging working environments remains a crucial challenge that AR / VR inspection systems need to overcome. Summary of the Invention

[0004] In view of the above-mentioned problems in the prior art, the purpose of the present invention is to provide a high-resolution lens for AR and VR glasses detection. The front aperture diameter of the optical system is 4mm, which has the advantages of compact structure, high image quality and high resolution, and is suitable for integration into machine vision image acquisition system and bionic human eye system.

[0005] A high-resolution lens for AR / VR glasses detection includes a front aperture and a lens module arranged sequentially along the optical axis from the object side to the image side. The lens module comprises:

[0006] The first group with positive optical power,

[0007] The second group has positive optical power.

[0008] The third group with positive optical power,

[0009] The fourth group with positive optical power,

[0010] The fifth group with positive optical power,

[0011] The focal lengths of each group in the high-resolution lens satisfy the following conditions:

[0012] -3 <f Q1 / f<0;

[0013] -3 <f Q2 / f<0;

[0014] -6 <f Q3 / f<-3;

[0015] -4 <f Q4 / f<-1;

[0016] -2000 <f Q5 / f<-1800;

[0017] Where f represents the effective focal length of the high-resolution lens, f Q1 For the effective focal length of the first group, f Q2 For the effective focal length of the second group, f Q3 For the effective focal length of the third group, f Q4 For the effective focal length of the fourth group, f Q5 This is the effective focal length for the fifth group.

[0018] Preferably, the first group includes, from the object side to the image side along the optical axis, a first lens with negative optical power, a second lens with positive optical power, a third lens with positive optical power, and a fourth lens with negative optical power.

[0019] The high-resolution lens meets the following conditions:

[0020] -1.5 <f1 / f Q1 <0, f1 represents the focal length of the first lens;

[0021] 0 <f2 / f Q1 <1.3, f2 represents the focal length of the second lens;

[0022] 0 <f3 / f Q1 <2.0, f3 indicates the focal length of the third lens;

[0023] -3.0 <f4 / f Q1 <0, f4 represents the focal length of the fourth lens;

[0024] The first lens and the second lens form a first cemented lens group with positive optical power, and the effective focal length f of the first cemented lens group is... 1-2 Condition met: 1.5 <f 1-2 / f Q1 <4;

[0025] The third and fourth lenses form a second cemented lens group with positive optical power, and the effective focal length f of the second cemented lens group is... 3-4 Condition met: 0 <f 3-4 / f Q1 <4;

[0026] The air gap between the front aperture and the first lens is between 1.50 and 1.70.

[0027] The air gap between the first cemented lens group and the second cemented lens group is between 0.20 and 0.40.

[0028] Preferably, the second group includes, from the object side to the image side along the optical axis, a fifth lens with positive optical power and a sixth lens with positive optical power.

[0029] The high-resolution lens meets the following conditions:

[0030] 0 <f5 / f Q2 <4, f5 indicates the focal length of the fifth lens;

[0031] 0 <f6 / f Q2 <2, f6 represents the focal length of the sixth lens;

[0032] The air gap between the second cemented lens group and the fifth lens is between 0.85 and 0.95; the air gap between the fifth lens and the sixth lens is between 11.20 and 11.40.

[0033] Preferably, the third group includes, from the object side to the image side along the optical axis, a seventh lens with positive optical power, an eighth lens with negative optical power, a ninth lens with negative optical power, a tenth lens with positive optical power, and an eleventh lens with positive optical power.

[0034] The high-resolution lens meets the following conditions:

[0035] 2 <f7 / f Q3 <6, f7 indicates the focal length of the seventh lens;

[0036] -1.2 <f8 / f Q3 <1, f8 represents the focal length of the eighth lens;

[0037] -1.0 <f9 / f Q3 <0.5, f9 indicates the focal length of the ninth lens;

[0038] -0.5 <f 10 / f Q3 <1,f 10 Indicates the focal length of the tenth lens;

[0039] -0.5 <f 11 / f Q3 <1.5, f 11 Indicates the focal length of the eleventh lens;

[0040] The seventh and eighth lenses form a third cemented lens group with negative optical power, and the effective focal length f of the third cemented lens group is... 7-8 Condition met: -1.5 <f 7-8 / f Q3 <0.5;

[0041] The ninth and tenth lenses form a fourth cemented lens group with negative optical power, and the effective focal length f of the fourth cemented lens group is... 9-10 Condition met: -1.5 <f 9-10 / f Q3 <0.5;

[0042] The air gap between the sixth lens and the third cemented lens group is between 0.35 and 0.55; the air gap between the third cemented lens group and the fourth cemented lens group is between 4.02 and 4.22; and the air gap between the fourth cemented lens group and the eleventh lens is between 0.20 and 0.40.

[0043] Preferably, the fourth group includes, from the object side to the image side along the optical axis, a twelfth lens with negative optical power, a thirteenth lens with positive optical power, a fourteenth lens with negative optical power, a fifteenth lens with positive optical power, and a sixteenth lens with positive optical power.

[0044] The high-resolution lens meets the following conditions:

[0045] -1.1 <f 12 / f Q4 <-0.1, f 12 Indicates the focal length of the twelfth lens;

[0046] 0 <f 13 / f Q4 <1.0, f 13 Indicates the focal length of the thirteenth lens;

[0047] -4.0 <f 14 / f Q4 <-1.0, f 14 Indicates the focal length of the fourteenth lens;

[0048] 1.0 <f 15 / f Q4 <2.0, f 15 Indicates the focal length of the fifteenth lens;

[0049] 0.8 <f 16 / f Q4 <2.5, f 16 Indicates the focal length of the sixteenth lens;

[0050] The twelfth and thirteenth lenses form a fifth cemented lens group with negative optical power, and the effective focal length f of the fifth cemented lens group is... 12-13 Condition met: -8 <f 12-13 / f Q4 <-10;

[0051] The fourteenth and fifteenth lenses form a sixth cemented lens group with positive optical power, and the effective focal length f of the sixth cemented lens group is... 14-15 Condition 3 is met. <f 14-15 / f Q4 <6;

[0052] An adjustable aperture is also provided between the fifth cemented lens group and the sixth cemented lens group;

[0053] The air gap between the eleventh lens and the fifth cemented lens group is between 11.22 and 11.42.

[0054] The air gap between the fifth cemented lens group and the adjustable aperture is between 7.50 and 7.70.

[0055] The air gap between the adjustable aperture and the sixth cemented lens group is between 2.12 and 2.22.

[0056] The air gap between the sixth cemented lens group and the sixteenth lens is between 0.70 and 0.90.

[0057] Preferably, the fifth group includes, from the object side to the image side along the optical axis, a seventeenth lens with positive optical power, an eighteenth lens with negative optical power, a nineteenth lens with negative optical power, a twentieth lens with positive optical power, and a twenty-first lens with positive optical power.

[0058] The high-resolution lens meets the following conditions:

[0059] -1 <f 17 / f Q5 <1,f 17 This indicates the focal length of the seventeenth lens;

[0060] -1 <f 18 / f Q5 <1,f 18 Indicates the focal length of the eighteenth lens;

[0061] -1 <f 19 / f Q5 <1,f 19 Indicates the focal length of the nineteenth lens;

[0062] -1 <f 20 / f Q5 <1,f20 represents the focal length of the twentieth lens;

[0063] -1 < f 21 / f Q5 < 1, f 21 represents the focal length of the twenty - first lens;

[0064] The seventeenth lens and the eighteenth lens form a seventh cemented lens group with a negative optical power, and the effective focal length f of the seventh cemented lens group 17-18 satisfies the condition: -1.5 < f 17-18 / f Q5 < 0.5;

[0065] The nineteenth lens and the twentieth lens form an eighth cemented lens group with a negative optical power, and the effective focal length f of the eighth cemented lens group 19-20 satisfies the condition: -1.5 < f 19-20 / f Q5 < 0.5;

[0066] Among them, the air gap between the sixteenth lens and the seventh cemented lens group is between 0.20 and 0.40; the air gap between the seventh cemented lens group and the eighth cemented lens group is between 2.12 and 2.32; the air gap between the eighth cemented lens group and the twenty - first lens is between 4.90 and 5.10.

[0067] Preferably, the effective focal length f of the lens module satisfies the condition: -25 mm < f < -5 m, the relative numerical aperture of the lens module is F / 4.8, it is received by a 1.1〞CCD, and the maximum optical total length is 132.0 mm.

[0068] Preferably, the full field angle of the high - resolution lens is 100°, when the working distance is 500 mm, the image height diagonal is 17.6 mm, the working wavelength range is 400 nm - 700 nm, the diameter of the front diaphragm is 4 mm, and the image - side resolution is 200 lp / mm.

[0069] The second object of the present invention is to provide a high - resolution optical system for AR and VR glasses detection, including the above - mentioned high - resolution lens for AR and VR glasses detection. The high - resolution optical system includes an image - side telecentric optical module and a steering optical module with a fixed diaphragm in front. The steering optical module includes a front - group lens, an adjustable diaphragm, and a rear - group lens;

[0070] The image - side telecentric optical module sequentially includes a first lens with a negative optical power, a second lens and a third lens with a positive optical power, a fourth lens with a negative optical power, and a fifth lens with a positive optical power arranged along the optical axis from the object side to the image side;

[0071] The steering optical module is arranged along the optical axis from the object side to the image side as follows: a sixth lens and a seventh lens with positive optical power; an eighth lens and a ninth lens with negative optical power; a tenth lens and an eleventh lens with positive optical power; a twelfth lens with negative optical power; a thirteenth lens with positive optical power; an adjustable aperture; a fourteenth lens with negative optical power; a fifteenth lens, a sixteenth lens, and a seventeenth lens with positive optical power; an eighteenth lens and a nineteenth lens with negative optical power; and a twentieth lens and a twenty-first lens with positive optical power.

[0072] The sixth to eleventh lenses constitute the front lens group, and the twelfth to twenty-first lenses constitute the rear lens group.

[0073] The beneficial effects of this invention are as follows: The high-resolution lens and optical system for AR / VR glasses detection uses a 21-piece spherical lens, and the modulation transfer function value of the entire field of view and full-band is greater than 0.2 when the image space frequency is 200 lp / mm; the front aperture diameter is 4 mm, which has the characteristics of compact structure, high image quality, and ultra-wide angle. The working band is 400nm-700nm. After focusing with visible light, high-resolution detection can be performed. It is very suitable for integration into machine vision image acquisition system and for online detection of AR / VR glasses using a bionic human eye. Attached Figure Description

[0074] The accompanying drawings are provided to further illustrate the invention and form part of the specification. They are used in conjunction with embodiments of the invention to explain the invention and do not constitute a limitation thereof. In the drawings:

[0075] Figure 1 This is a schematic diagram of the optical structure of the present invention;

[0076] Figure 2 This invention provides a ray dot pattern diagram of each field of view on the image plane when the image height is 0mm, 5.2mm, 7.0mm, 8.1mm, and 8.8mm.

[0077] Figure 3 This is a plot of the MTF (Mean Transfer Function) curve on the field of view image plane of the present invention;

[0078] Figure 4 This is the field curvature and distortion diagram of the present invention;

[0079] Figure 5 This is the vertical axis color difference diagram of the present invention;

[0080] Figure 6 This is the aberration map of the Seid coefficient of the present invention;

[0081] Figure 7 This is a relative illumination diagram of the present invention. Detailed Implementation

[0082] Example 1

[0083] like Figure 1 As shown, a high-resolution lens for AR / VR glasses detection includes a front aperture and a lens module arranged sequentially along the optical axis from the object side to the image side. The lens module includes:

[0084] A first group having positive optical power, the first group including a first lens to a fourth lens sequentially along the optical axis from the object side to the image side, wherein the first lens and the fourth lens have negative optical power, and the second lens and the third lens have positive optical power.

[0085] The second group has positive optical power, and the second group includes a fifth lens and a sixth lens in sequence along the optical axis from the object side to the image side, wherein both the fifth lens and the sixth lens have positive optical power.

[0086] The third group has positive optical power. The third group includes lenses seven to eleven in sequence along the optical axis from the object side to the image side. Among them, the seventh, tenth, and eleventh lenses have positive optical power, and the eighth and ninth lenses have negative optical power.

[0087] The fourth group has positive optical power. The fourth group includes the twelfth to the sixteenth lenses in sequence along the optical axis from the object side to the image side. Among them, the twelfth and fourteenth lenses have negative optical power, and the thirteenth, fifteenth and sixteenth lenses have positive optical power.

[0088] The fifth group has positive optical power. The fifth group includes lenses seventeen to twenty-first along the optical axis from the object side to the image side. Among them, lenses seventeen, twentieth and twenty-first have positive optical power, and lenses eighteen and nineteen have negative optical power.

[0089] This high-resolution lens for AR and VR glasses detection has a total negative optical power.

[0090] The focal length of each group satisfies the following condition:

[0091] -3 <f Q1 / f<0;

[0092] -3 <f Q2 / f<0;

[0093] -6 <f Q3 / f<-3;

[0094] -4 <f Q4 / f<-1;

[0095] -2000 <f Q5 / f<-180.

[0096] Among them, f represents the effective focal length of the high-resolution lens, f Q1 is the effective focal length of the first group, f Q2 is the effective focal length of the second group, f Q3 is the effective focal length of the third group, f Q4 is the effective focal length of the fourth group, f Q5 is the effective focal length of the fifth group.

[0097] The effective focal length f of the lens module satisfies the condition: -25mm < f < -5m, the relative numerical aperture of the lens module is F / 4.8, it is received by a 1.1〞CCD, and the maximum optical total length is 132.0mm.

[0098] The full field angle of the high-resolution lens is 100°. When the working distance is 500mm, the image height diagonal is 17.6mm, the working wavelength range is 400nm - 700nm, and it can perform high-resolution detection after focusing with visible light. It is very suitable for integration into a machine vision image acquisition system and for online detection of AR / VR glasses by simulating the human eye; the diameter of the front aperture is 4mm, the front entrance pupil of the high-resolution lens coincides with the front aperture, and the image-side resolution is 200lp / mm, with the characteristics of a compact structure, high image quality, and ultra-wide angle.

[0099] In addition, the first lens and the second lens form a first cemented lens group with positive optical power, the third lens and the fourth lens form a second cemented lens group with positive optical power, the seventh lens and the eighth lens form a third cemented lens group with negative optical power, the ninth lens and the tenth lens form a fourth cemented lens group with negative optical power, the twelfth lens and the thirteenth lens form a fifth cemented lens group with negative optical power, the fourteenth lens and the fifteenth lens form a sixth cemented lens group with positive optical power, the seventeenth lens and the eighteenth lens form a seventh cemented lens group with negative optical power, and the nineteenth lens and the twentieth lens form an eighth cemented lens group with negative optical power.

[0100] Specifically, the focal lengths of the lenses in the high-resolution lens satisfy the following conditions:

[0101] -1.5 < f1 / f Q1 < 0, where f1 represents the focal length of the first lens;

[0102] 0 < f2 / f Q1 < 1.3, where f2 represents the focal length of the second lens;

[0103] 0 < f3 / f Q1 < 2.0, where f3 represents the focal length of the third lens;

[0104] -3.0 < f4 / f Q1 < 0, where f4 represents the focal length of the fourth lens;

[0105] 0 <f5 / f Q2 <4, f5 indicates the focal length of the fifth lens;

[0106] 0 <f6 / f Q2 <2, f6 represents the focal length of the sixth lens;

[0107] 2 <f7 / f Q3 <6, f7 indicates the focal length of the seventh lens;

[0108] -1.2 <f8 / f Q3 <1, f8 represents the focal length of the eighth lens;

[0109] -1.0 <f9 / f Q3 <0.5, f9 indicates the focal length of the ninth lens;

[0110] -0.5 <f 10 / f Q3 <1,f 10 Indicates the focal length of the tenth lens;

[0111] -0.5 <f 11 / f Q3 <1.5, f 11 Indicates the focal length of the eleventh lens;

[0112] -1.1 <f 12 / f Q4 <-0.1, f 12 Indicates the focal length of the twelfth lens;

[0113] 0 <f 13 / f Q4 <1.0, f 13 Indicates the focal length of the thirteenth lens;

[0114] -4.0 <f 14 / f Q4 <-1.0, f 14 Indicates the focal length of the fourteenth lens;

[0115] 1.0 <f 15 / f Q4 <2.0, f 15 Indicates the focal length of the fifteenth lens;

[0116] 0.8 <f 16 / f Q4 <2.5, f 16 Indicates the focal length of the sixteenth lens;

[0117] -1 <f 17 / f Q5 <1,f 17 This indicates the focal length of the seventeenth lens;

[0118] -1 <f 18 / f Q5 <1,f 18 Indicates the focal length of the eighteenth lens;

[0119] -1 <f 19 / f Q5 <1,f 19 Indicates the focal length of the nineteenth lens;

[0120] -1 <f 20 / f Q5 <1,f 20 This indicates the focal length of the twentieth lens;

[0121] -1 <f 21 / f Q5 <1,f 21 This indicates the focal length of the twenty-first lens.

[0122] Furthermore, the effective focal length of each cemented lens group in a high-resolution lens satisfies the following condition:

[0123] The effective focal length f of the first cemented lens group 1-2 Condition met: 1.5 <f 1-2 / f Q1 <4;

[0124] The effective focal length f of the second cemented lens group 3-4 Condition met: 0 <f 3-4 / f Q1 <4;

[0125] The effective focal length f of the third cemented lens group 7-8 Condition met: -1.5 <f 7-8 / f Q3 <0.5;

[0126] The effective focal length f of the fourth cemented lens group 9-10 Condition met: -1.5 <f 9-10 / f Q3 <0.5;

[0127] The effective focal length f of the fifth cemented lens group 12-13 Condition met: -8 <f 12-13 / f Q4 <-10;

[0128] The effective focal length f of the sixth cemented lens group 14-15 Condition 3 is met. <f 14-15 / f Q4 <6;

[0129] The effective focal length f of the seventh cemented lens group17-18 Condition met: -1.5 <f 17-18 / f Q5 <0.5;

[0130] The effective focal length f of the eighth cemented lens group 19-20 Condition met: -1.5 <f 19-20 / f Q5 <0.5.

[0131] Specifically, an adjustable aperture is provided between the fifth and sixth cemented lens groups, and the air gap between each lens satisfies the following conditions:

[0132] The air gap between the front aperture and the first lens is between 1.50 and 1.70.

[0133] The air gap between the first cemented lens group and the second cemented lens group is between 0.20 and 0.40.

[0134] The air gap between the second cemented lens group and the fifth lens is between 0.85 and 0.95.

[0135] The air gap between the fifth and sixth lenses is between 11.20 and 11.40.

[0136] The air gap between the sixth lens and the third cemented lens group is between 0.35 and 0.55.

[0137] The air gap between the third and fourth cemented lens groups is between 4.02 and 4.22.

[0138] The air gap between the fourth cemented lens group and the eleventh lens is between 0.20 and 0.40.

[0139] The air gap between the eleventh lens and the fifth cemented lens group is between 11.22 and 11.42.

[0140] The air gap between the fifth cemented lens group and the adjustable diaphragm is between 7.50 and 7.70.

[0141] The air gap between the adjustable aperture and the sixth cemented lens group is between 2.12 and 2.22.

[0142] The air gap between the sixth cemented lens group and the sixteenth lens is between 0.70 and 0.90.

[0143] The air gap between the sixteenth lens and the seventh cemented lens group is between 0.20 and 0.40.

[0144] The air gap between the seventh and eighth cemented lens groups is between 2.12 and 2.32.

[0145] The air gap between the eighth cemented lens group and the twenty-first lens is between 4.90 and 5.10.

[0146] The optical simulation in this embodiment of the invention uses Chengdu Guangming Optical Glass. Considering the transmittance performance of the high-resolution lens used for AR and VR glasses testing in the 400-700nm band, as well as the processability and stability of the materials, this embodiment ultimately selected materials such as H-QK3, H-ZKB, H-ZF6, H-LAFL5, H-K10, H-ZBAF16, H-LAF3B, H-LAF4, H-LAK10, and H-ZF3.

[0147] In this embodiment, the effective focal length of the lens is -17mm, the diameter of the front aperture is 4mm, a 1.1" CCD is used for reception, the maximum aperture of the lens is 22mm, the total optical length is less than 132.0mm from the first lens to the twenty-first lens, the diagonal of the full field of view of the lens is 17.6mm (working distance 500mm), and the working wavelength is 400nm-700nm.

[0148] The parameters of each lens in this embodiment are shown in Table 1:

[0149]

[0150]

[0151] Table 1

[0152] like Figure 2 The figure shows the ray dot pattern on the image plane for each field of view in an embodiment of the present invention, when the system's image-side field of view is 0mm, 5.2mm, 7.0mm, 8.1mm, and 8.8mm. It can be seen from the figure that the root mean square radius of the dot pattern under each field of view is less than 3.2μm.

[0153] Figure 3 This is a graph showing the MTF (Mean Transfer Function) curves of the high-resolution ultra-wide-angle optical system for AR / VR glasses detection in this embodiment of the invention, on the chip surface of each field of view. In the graph, the MTF values ​​for each field of view at 200 lp / mm are all greater than 0.2, and the curves are smooth and compact. The lens in this embodiment produces clear and uniform imaging, and the system exhibits excellent imaging quality across the entire spectral and field of view.

[0154] Figure 4 This is a field curvature and distortion diagram of a high-resolution ultra-wide-angle optical system used for AR and VR glasses detection in an embodiment of the present invention.

[0155] Figure 5This is a transverse chromatic aberration diagram of a high-resolution ultra-wide-angle optical system used for AR / VR glasses detection in this embodiment of the invention. The diagram shows that the maximum lateral chromatic aberration is less than 3.5 μm, all within the Airy disk area, and has minimal impact on the imaging results.

[0156] Figure 6 This is a Seidel coefficient aberration diagram of a high-resolution ultra-wide-angle optical system used for AR / VR glasses detection in an embodiment of the present invention. Figure 6 It can be seen that the phase difference balance results are good within the wavelength range of 587.6nm.

[0157] Figure 7 This is a relative illumination diagram of the high-resolution ultra-wide-angle optical system used for AR / VR glasses detection in an embodiment of the present invention. Figure 7 It can be seen that the illuminance is very uniform across the entire field of view.

[0158] Example 2

[0159] The second aspect of the present invention is to provide a high-resolution optical system for AR / VR glasses detection, wherein the high-resolution lens for AR / VR glasses detection described in Embodiment 1 includes a front-mounted image-side telecentric optical module with a fixed aperture and a steering optical module, wherein the steering optical module includes a front lens, an adjustable aperture and a rear lens.

[0160] The image-side telecentric optical module is arranged sequentially along the optical axis from the object side to the image side, including a first lens with negative optical power, a second lens and a third lens with positive optical power, a fourth lens with negative optical power, and a fifth lens with positive optical power.

[0161] The steering optical module is arranged along the optical axis from the object side to the image side as follows: a sixth lens and a seventh lens with positive optical power; an eighth lens and a ninth lens with negative optical power; a tenth lens and an eleventh lens with positive optical power; a twelfth lens with negative optical power; a thirteenth lens with positive optical power; an adjustable aperture; a fourteenth lens with negative optical power; a fifteenth lens, a sixteenth lens, and a seventeenth lens with positive optical power; an eighteenth lens and a nineteenth lens with negative optical power; and a twentieth lens and a twenty-first lens with positive optical power.

[0162] The sixth to eleventh lenses constitute the front lens group, and the twelfth to twenty-first lenses constitute the rear lens group.

[0163] The high-resolution optical system for AR and VR glasses detection has a total negative optical power; among which, the image-side telecentric optical module with a fixed aperture in front has positive optical power, and the steering optical module has positive optical power.

[0164] The image plane of the fixed aperture front-positioned telecentric optical module coincides with the object plane of the steering optical module.

[0165] The above description is merely a preferred embodiment of the present invention and is not intended to limit the present invention. Although the present invention has been described in detail with reference to the foregoing embodiments, those skilled in the art can still modify the technical solutions described in the foregoing embodiments or make equivalent substitutions for some of the technical features. Any modifications, equivalent substitutions, improvements, etc., made within the spirit and principles of the present invention should be included within the protection scope of the present invention.

Claims

1. A high-resolution lens for AR / VR glasses detection, characterized in that, A front aperture and a lens module are arranged sequentially along the optical axis from the object side to the image side. The lens module consists of the following five groups: The first group with positive optical power, The second group has positive optical power. The third group with positive optical power, The fourth group with positive optical power, The fifth group with positive optical power, The focal lengths of each group in the high-resolution lens satisfy the following conditions: -3<f Q1 / f<0; -3<f Q2 / f<0; -6<f Q3 / f<-3; -4<f Q4 / f<-1; -2000<f Q5 / f<-1800; Where f represents the effective focal length of the high-resolution lens, f Q1 For the effective focal length of the first group, f Q2 For the effective focal length of the second group, f Q3 For the effective focal length of the third group, f Q4 For the effective focal length of the fourth group, f Q5 This is the effective focal length for the fifth group.

2. The high-resolution lens for AR / VR glasses detection according to claim 1, characterized in that, The first group includes, from the object side to the image side along the optical axis, a first lens with negative optical power, a second lens with positive optical power, a third lens with positive optical power, and a fourth lens with negative optical power. The high-resolution lens meets the following conditions: -1.5 <f1 / f Q1 <0, f1 represents the focal length of the first lens; 0 <f2 / f Q1 <1.3, f2 represents the focal length of the second lens; 0 <f3 / f Q1 <2.0, f3 indicates the focal length of the third lens; -3.0 <f4 / f Q1 <0, f4 represents the focal length of the fourth lens; The first lens and the second lens form a first cemented lens group with positive optical power, and the effective focal length f of the first cemented lens group is... 1-2 Condition met: 1.5 <f 1-2 / f Q1 <4; The third and fourth lenses form a second cemented lens group with positive optical power, and the effective focal length f of the second cemented lens group is... 3-4 Condition met: 0 <f 3-4 / f Q1 <4; The air gap between the front aperture and the first lens is between 1.50 mm and 1.70 mm. The air gap between the first cemented lens group and the second cemented lens group is between 0.20 mm and 0.40 mm.

3. The high-resolution lens for AR / VR glasses detection according to claim 2, characterized in that, The second group includes, from the object side to the image side along the optical axis, a fifth lens with positive optical power and a sixth lens with positive optical power. The high-resolution lens meets the following conditions: 0 <f5 / f Q2 <4, f5 indicates the focal length of the fifth lens; 0 <f6 / f Q2 <2, f6 represents the focal length of the sixth lens; The air gap between the second cemented lens group and the fifth lens is between 0.85 mm and 0.95 mm. The air gap between the fifth and sixth lenses is between 11.20 mm and 11.40 mm.

4. The high-resolution lens for AR / VR glasses detection according to claim 3, characterized in that, The third group, from the object side to the image side along the optical axis, includes a seventh lens with positive optical power, an eighth lens with negative optical power, a ninth lens with negative optical power, a tenth lens with positive optical power, and an eleventh lens with positive optical power. The high-resolution lens meets the following conditions: 2 <f7 / f Q3 <6, f7 indicates the focal length of the seventh lens; -1.2 <f8 / f Q3 <0, f8 represents the focal length of the eighth lens; -1.0 <f9 / f Q3 <0, f9 indicates the focal length of the ninth lens; 0 <f 10 / f Q3 <1,f 10 Indicates the focal length of the tenth lens; 0 <f 11 / f Q3 <1.5, f 11 Indicates the focal length of the eleventh lens; The seventh and eighth lenses form a third cemented lens group with negative optical power, and the effective focal length f of the third cemented lens group is... 7-8 Condition met: -1.5 <f 7-8 / f Q3 <0; The ninth and tenth lenses form a fourth cemented lens group with negative optical power, and the effective focal length f of the fourth cemented lens group is... 9-10 Condition met: -1.5 <f 9-10 / f Q3 <0; The air gap between the sixth lens and the third cemented lens group is between 0.35 mm and 0.55 mm. The air gap between the third cemented lens group and the fourth cemented lens group is between 4.02 mm and 4.22 mm; The air gap between the fourth cemented lens group and the eleventh lens is between 0.20 mm and 0.40 mm.

5. The high-resolution lens for AR / VR glasses detection according to claim 4, characterized in that, The fourth group, from the object side to the image side along the optical axis, includes, in sequence, a twelfth lens with negative optical power, a thirteenth lens with positive optical power, a fourteenth lens with negative optical power, a fifteenth lens with positive optical power, and a sixteenth lens with positive optical power; The high-resolution lens meets the following conditions: -1.1 <f 12 / f Q4 <-0.1, f 12 Indicates the focal length of the twelfth lens; 0 <f 13 / f Q4 <1.0, f 13 Indicates the focal length of the thirteenth lens; -4.0 <f 14 / f Q4 <-1.0, f 14 Indicates the focal length of the fourteenth lens; 1.0 <f 15 / f Q4 <2.0, f 15 Indicates the focal length of the fifteenth lens; 0.8 <f 16 / f Q4 <2.5, f 16 Indicates the focal length of the sixteenth lens; The twelfth and thirteenth lenses form a fifth cemented lens group with negative optical power, and the effective focal length f of the fifth cemented lens group is... 12-13 Condition met: -10 <f 12-13 / f Q4 <-8; The fourteenth and fifteenth lenses form a sixth cemented lens group with positive optical power, and the effective focal length f of the sixth cemented lens group is... 14-15 Condition 3 is met. <f 14-15 / f Q4 <6; An adjustable aperture is also provided between the fifth cemented lens group and the sixth cemented lens group; The air gap between the eleventh lens and the fifth cemented lens group is between 11.22 mm and 11.42 mm. The air gap between the fifth cemented lens group and the adjustable aperture is between 7.50 mm and 7.70 mm; The air gap between the adjustable aperture and the sixth cemented lens group is between 2.12 mm and 2.22 mm; The air gap between the sixth cemented lens group and the sixteenth lens is between 0.70 mm and 0.90 mm.

6. The high-resolution lens for AR / VR glasses detection according to claim 5, characterized in that, The fifth group of components includes, in order from the object side to the image side along the optical axis, a seventeenth lens with a positive focal power, an eighteenth lens with a negative focal power, a nineteenth lens with a negative focal power, a twentieth lens with a positive focal power, and a twenty-first lens with a positive focal power; The high-resolution lens satisfies the following conditions: 0 <f 17 / f Q5 <1,f 17 This indicates the focal length of the seventeenth lens; -1 <f 18 / f Q5 <0, f 18 Indicates the focal length of the eighteenth lens; -1 <f 19 / f Q5 <0, f 19 Indicates the focal length of the nineteenth lens; 0 <f 20 / f Q5 <1,f 20 This indicates the focal length of the twentieth lens; 0 <f 21 / f Q5 <1,f 21 This indicates the focal length of the twenty-first lens; The seventeenth and eighteenth lenses together form a seventh cemented lens group with negative optical power, and the effective focal length f of the seventh cemented lens group is... 17-18 Condition met: -1.5 <f 17-18 / f Q5 <0; The nineteenth and twentieth lenses together form the eighth cemented lens group with negative optical power, and the effective focal length f of the eighth cemented lens group is... 19-20 Condition met: -1.5 <f 19-20 / f Q5 <0; Among them, the air gap between the sixteenth lens and the seventh cemented lens group is between 0.20 mm and 0.40 mm; The air gap between the seventh cemented lens group and the eighth cemented lens group is between 2.12 mm and 2.32 mm; The air gap between the eighth cemented lens group and the twenty-first lens is between 4.90 mm and 5.10 mm.

7. The high-resolution lens for AR and VR glasses detection according to claim 1, wherein The effective focal length f of the lens module satisfies the condition: -25 mm < f < -5 m, the relative numerical aperture of the lens module is F / 4.8, it is received by a 1.1〞CCD, and the maximum optical total length is 132.0 mm.

8. The high-resolution lens for AR / VR glasses detection according to claim 1, characterized in that, The full field angle of the high-resolution lens is 100°, when the working distance is 500 mm, the diagonal of the image height is 17.6 mm, the working wavelength range is 400 nm - 700 nm, the diameter of the front aperture is 4 mm, and the image-side resolution is 200 lp / mm.

9. A high-resolution optical system for detecting AR / VR glasses, characterized in that, It includes the high-resolution lens for AR and VR glasses detection according to any one of claims 6 - 8. The high-resolution optical system includes an image-side telecentric optical module with a fixed aperture in front and a steering optical module. The steering optical module includes a front group of lenses, an adjustable aperture, and a rear group of lenses; The image-side telecentric optical module includes, in order from the object side to the image side along the optical axis, a first lens with a negative focal power, a second lens and a third lens with a positive focal power, a fourth lens with a negative focal power, and a fifth lens with a positive focal power; The steering optical module includes, in order from the object side to the image side along the optical axis, a sixth lens, a seventh lens with a positive focal power, an eighth lens, a ninth lens with a negative focal power, a tenth lens, an eleventh lens with a positive focal power, a twelfth lens with a negative focal power, a thirteenth lens with a positive focal power, an adjustable aperture, a fourteenth lens with a negative focal power, a fifteenth lens, a sixteenth lens, a seventeenth lens with a positive focal power, an eighteenth lens, a nineteenth lens with a negative focal power, a twentieth lens, a twenty-first lens with a positive focal power; Among them, the sixth to eleventh lenses form the front group of lenses, and the twelfth to twenty-first lenses form the rear group of lenses.

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