Virtual image combination analysis method for vr projection lens module

Abstract

The application discloses a kind of VR projection lens module virtual image combination analysis type detection methods, it is characterized in that: including analysis center, screen, VR projection lens, detection frame and a plurality of VR detection systems being set on detection frame, VR projection lens is placed on detection table, VR detection system includes industrial camera and test lens module, this method does not need to obtain the image of whole screen, so for each industrial camera, greatly reduce the resolution requirement, so that cost is greatly reduced, even if the total price of multiple is lower than the price of previous one, and data transmission quantity is also less, so that data transmission time is greatly reduced, so that test efficiency is greatly improved.

Description

TECHNICAL FIELD

[0001] The application relates to a virtual image combined analysis type detection method for a VR projection lens module. BACKGROUND

[0002] The VR glasses 100 are mainly composed of a VR projection lens and a VR screen, and the VR glasses 100 need to simulate a range of object distances from 0.5 meters to infinity, and the range of object distances is large. From the process, the VR glasses 100 need AA to ensure the distance between the screen and the VR projection lens (determine the simulated distance, such as 2 meters) and the imaging quality; the imaging quality detection of the VR glasses 100: the imaging quality corresponding to the detection module distance. The existing detection method of the VR glasses 100 is generally as follows: the VR projection lens is placed on a detection table, an industrial camera and a special lens are used to form an eye camera 200 at the exit pupil position of the VR glasses 100 to replace the human eye to obtain an image (as shown in Figure 2 ), a plurality of detection marks are arranged on the image on the screen, the image is analyzed by software running in an analysis center, mainly based on an MTF data graph, the clarity of the image is determined, and then whether the VR projection lens and the VR screen meet the requirements is determined. The industrial camera and the special lens must be very close to the VR glasses 100, and the distance is the same as that from the human eye 300 to the VR glasses 100 (as shown in Figure 1 ), and the distance is very short, only tens of millimeters, which is not conducive to the AA process of the VR glasses; the detection method of the industrial camera and the special lens forming the eye camera 200 can only use one camera to detect the entire VR projection image, that is, the image displayed on the VR screen is projected onto the industrial camera through the special lens, the image is transmitted to the analysis center by the industrial camera, and then the clarity of the local area containing the detection marks on the image is analyzed by the software running in the analysis center to determine whether the VR projection lens and the assembly meet the standard. The above detection method has the following disadvantages: because the resolution needs to be ensured, the number of image pixels of the entire screen is huge, so the requirement for the industrial camera is also very high, thereby causing high cost, and when the above image data is transmitted to the analysis center for analysis, the data transmission time is long because of the large amount of data.

[0003] Therefore, it is necessary to propose a new detection method for the above problems. SUMMARY

[0004] In order to overcome the shortcomings of the prior art, the application provides a virtual image combined analysis type detection method for a VR projection lens module, which can realize the following functions:

[0005] The technical scheme adopted by the application to solve the technical problems is:

[0006] The application discloses a virtual reality (VR) projection lens module virtual image combination analysis type detection method, which is characterized by comprising an analysis center, a screen, a VR projection lens, a detection frame and a plurality of VR detection systems arranged on the detection frame, wherein the VR projection lens is placed on the detection frame, and the VR detection system comprises an industrial camera and a test lens module.

[0007] Step one: a plurality of detection marks are designed on a detection image, and the image with the detection marks is input to the screen.

[0008] Step two: the position of each VR detection system is adjusted through the detection frame, so that the test lens module takes a local image containing the detection marks through the VR projection lens and projects the local image onto the corresponding industrial camera.

[0009] Step three: the industrial camera transmits the taken local image to the analysis center, and the analysis center analyzes and compares the local image, so as to determine whether the VR projection lens meets the standard.

[0010] The detection frame comprises a bottom plate, a center adjusting disc and a plurality of arc-shaped frame plates, the arc-shaped frame plates are connected with the center adjusting disc and the bottom plate through screws, a plurality of adjusting holes are arranged on the arc-shaped frame plates, an installation plate is arranged on the VR detection system, and the installation plate is locked with the arc-shaped frame plate through a corresponding adjusting hole through a threaded handle.

[0011] The test lens module comprises a symmetrical optical system and an imaging optical system arranged along an optical axis, the imaging optical system takes a local image containing the detection marks through the symmetrical optical system and the VR projection lens, and projects the local image onto the corresponding industrial camera.

[0012] The symmetrical optical system comprises a lens group one and a lens group two, the lens group one comprises a lens one, a lens two, a lens three and a lens four, the lens group two comprises a lens five, a lens six, a lens seven and a lens eight, the lens one and the lens eight are the same in structure and are symmetrically arranged with respect to a virtual plane, the lens two and the lens seven are the same in structure and are symmetrically arranged with respect to the virtual plane, the lens three and the lens six are the same in structure and are symmetrically arranged with respect to the virtual plane, and the lens four and the lens five are the same in structure and are symmetrically arranged with respect to the virtual plane, wherein the virtual plane is located at the center position between the lens group one and the lens group two and is perpendicular to the optical axis.

[0013] The lens one and the lens eight are double-concave lenses, the lens two, the lens four, the lens five and the lens seven are double-convex lenses, the lens three and the lens six are convex-concave lenses, the lens one is a negative focal length lens and the curvature values of two surfaces are equal; the lens two is a positive focal length lens and the surface with a smaller curvature radius faces the VR projection lens and the surface with a larger curvature radius faces the industrial camera; the lens three is a negative focal length lens and the convex surface faces the VR projection lens and the concave surface faces the industrial camera; the lens four is a positive focal length lens and the surface with a larger curvature radius faces the VR projection lens and the surface with a smaller curvature radius faces the industrial camera; the lens five is a positive focal length lens and the surface with a smaller curvature radius faces the VR projection lens and the surface with a larger curvature radius faces the industrial camera; the lens six is a negative focal length lens and the concave surface faces the VR projection lens and the convex surface faces the industrial camera; the lens seven is a positive focal length lens and the surface with a larger curvature radius faces the VR projection lens and the surface with a smaller curvature radius faces the industrial camera; the lens eight is a negative focal length lens and the curvature values of two surfaces are equal.

[0014] The lens one has a refractive index range of 1.55-1.75, a dispersion coefficient range of 25-45, a surface one curvature radius of -110mm- -130mm and a surface two curvature radius of 110mm-130mm; the lens two has a refractive index range of 1.70-1.90, a dispersion coefficient range of 35-55, a surface one curvature radius of 50mm-70mm and a surface two curvature radius of -80mm- -100mm; the lens three has a refractive index range of 1.70-1.90, a dispersion coefficient range of 35-55, a surface one curvature radius of 40-60 and a surface two curvature radius of 30-50; the lens four has a refractive index range of 1.40-1.6, a dispersion coefficient range of 70-90, a surface one curvature radius of 70-90 and a surface two curvature radius of -40--60; the lens five has a refractive index range of 1.40-1.6, a dispersion coefficient range of 70-90, a surface one curvature radius of 40-60 and a surface two curvature radius of -70--90; the lens six has a refractive index range of 1.70-1.90, a dispersion coefficient range of 35-55, a surface one curvature radius of -30--50 and a surface two curvature radius of -40--60; the lens seven has a refractive index range of 1.70-1.90, a dispersion coefficient range of 35-55, a surface one curvature radius of 80mm-100mm and a surface two curvature radius of -50mm- -70mm; the lens eight has a refractive index range of 1.55-1.75, a dispersion coefficient range of 25-45, a surface one curvature radius of -110mm- -130mm and a surface two curvature radius of 110mm-130mm.

[0015] The lens one has a focal length of f=-90mm; the lens two has a focal length of f=45mm; the lens three has a focal length of f=-300mm; the lens four has a focal length of f=60mm; the lens five has a focal length of f=60mm; the lens six has a focal length of f=-300mm; the lens seven has a focal length of f=45mm; and the lens eight has a focal length of f=-90mm.

[0016] The camera optical system comprises lens nine, lens ten, lens eleven, lens twelve and lens thirteen, the lens eleven is a double concave lens, the lens nine, lens twelve and lens thirteen are double convex lenses, the lens ten is a plano-convex lens, the lens nine is a positive focal length lens and the surface with a larger radius of curvature faces the VR projection lens and the surface with a smaller radius of curvature faces the industrial camera; the lens ten is a positive focal length lens and the convex surface faces the VR projection lens and the plane faces the industrial camera; the lens eleven is a negative focal length lens and the surface with a larger radius of curvature faces the VR projection lens and the surface with a smaller radius of curvature faces the industrial camera; the lens twelve is a positive focal length lens and the surface with a larger radius of curvature faces the VR projection lens and the surface with a smaller radius of curvature faces the industrial camera; and the lens thirteen is a positive focal length lens and the surface with a larger radius of curvature faces the VR projection lens and the surface with a smaller radius of curvature faces the industrial camera.

[0017] The lens nine has a refractive index range of 1.60-1.80 and a dispersion coefficient range of 40-60, and a radius of curvature of surface one is 45-65 and a radius of curvature of surface two is -5--25; the lens ten has a refractive index range of 1.75-1.95 and a dispersion coefficient range of 10-30, and a radius of curvature of surface one is 10-30 and a radius of curvature of surface two is a plane; the lens eleven has a refractive index range of 1.50-1.70 and a dispersion coefficient range of 50-70, and a radius of curvature of surface one is -120--140 and a radius of curvature of surface two is 70-90; the lens twelve has a refractive index range of 1.55-1.75 and a dispersion coefficient range of 40-60, and a radius of curvature of surface one is 90-110 and a radius of curvature of surface two is -60--80; and the lens thirteen has a refractive index range of 1.40-1.60 and a dispersion coefficient range of 70-90, and a radius of curvature of surface one is 40-60 and a radius of curvature of surface two is -20--40.

[0018] The lens nine has a focal length of f=10mm; the lens ten has a focal length of f=20mm; the lens eleven has a focal length of f=-80mm; the lens twelve has a focal length of f=60mm; and the lens thirteen has a focal length of f=40mm.

[0019] The test lens module of the present application takes a local image containing a detection mark through a VR projection lens, projects the local image onto a corresponding industrial camera, and then the industrial camera transmits the taken local image to an analysis center for analysis and comparison, so as to determine whether the VR projection lens meets the standard.

[0020] The above method does not need to obtain an image of the whole screen, thus greatly reducing the resolution requirement for each industrial camera, thereby greatly reducing the cost, even if the total price of multiple industrial cameras is lower than the price of one industrial camera, and the data transmission amount is also small, thereby greatly reducing the data transmission time and greatly improving the test efficiency. BRIEF DESCRIPTION OF DRAWINGS

[0021] The present invention will be further described below with reference to the accompanying drawings and embodiments.

[0022] Figure 1 This is a diagram illustrating how the human eye views VR glasses;

[0023] Figure 2 This is a diagram illustrating how a human eye-camera views VR glasses.

[0024] Figure 3 This is the optical path diagram of the present invention;

[0025] Figure 4 yes Figure 3 The optical path diagram at point A;

[0026] Figure 5 yes Figure 3 The optical path diagram at point B;

[0027] Figure 6 This is a diagram of the internal structure of the test chamber;

[0028] Figure 7 It is a lens arrangement diagram;

[0029] Figure 8 This is a layout diagram of the detection system;

[0030] Figure 9 It is a data graph of field curvature and distortion;

[0031] Figure 10 This is during the testing of VR glasses in this system. MTF Data chart. Detailed Implementation

[0032] The advantages and features of this disclosure, as well as its implementation methods, will be illustrated by the following embodiments described with reference to the accompanying drawings. However, this disclosure may be embodied in different forms and should not be construed as limited to the embodiments set forth herein. Rather, these embodiments are provided so that this disclosure will be comprehensive and complete, and will fully convey the scope of this disclosure to those skilled in the art. Furthermore, this disclosure is limited only by the scope of the claims.

[0033] The shapes, dimensions, scales, angles, and numbers disclosed in the accompanying drawings used to describe embodiments of this disclosure are merely examples, and therefore this disclosure is not limited to the details shown. Throughout this specification, the same reference numerals refer to the same elements. In the following description, detailed descriptions of relevant known functions or configurations will be omitted where it is determined that such detailed descriptions would unnecessarily obscure the focus of this disclosure. Where the terms “comprising,” “having,” and “including” are used in this specification, additional components may be added unless “only” is used. Unless otherwise indicated, singular terms may include plural forms.

[0034] In explaining elements, although not explicitly described, elements are understood to include error ranges.

[0035] In describing positional relationships, for example, when the positional relationship is described as "on", "above", "below", and "adjacent to", unless "immediately" or "directly" is used, one or more parts can be arranged between two other parts.

[0036] In describing temporal relationships, for example, when the temporal order is described as "after", "subsequently", "next", and "before", unless "immediately" or "directly" is used, discontinuous cases can be included.

[0037] It should be understood that although the terms "first", "second", and the like can be used herein to describe various elements, the elements should not be limited by these terms. These terms are only used to distinguish one element from another. For example, a first element can be called a second element, and similarly, a second element can be called a first element without departing from the scope of the present disclosure.

[0038] As a person of ordinary skill in the art can fully understand, the features of different embodiments of the present disclosure can be partially or wholly coupled or combined with each other, and can be cooperated with each other in various ways and technically driven. Embodiments of the present disclosure can be executed independently of each other, or can be executed together in a mutually dependent relationship.

[0039] Reference Figure 8The application discloses a kind of VR projection lens module virtual image combination analysis type detection methods, including analysis center (not shown in figure), screen (not shown in figure), VR projection lens 1, detection frame 2 and several VR detection systems 3 on detection frame 2, VR projection lens 1 is placed on detection table 4, VR detection system 3 includes industrial camera 34 and test lens module, the test lens module has the function of shortening distance, in the application, screen, VR projection lens 1 and the arrangement on detection table 4 are same as before, the application preferably five groups of VR detection systems 3 are collected image and are analyzed, detection frame 2 is placed on detection table 4, and the center of detection frame 2 coincides with the center of detection table 4, VR projection lens 1 is placed in the center position of detection table 4, one of the five groups of VR detection systems 3 is located in the center position of detection frame 2, and the other four groups are evenly distributed around the center position of detection frame 2, if VR projection lens 1 is in line with standard, then the resolution obtained by image analysis of four groups of VR detection systems 3 of the same height is similar, the above arrangement can simplify analysis and improve efficiency, of course, five groups are only a specific quantity, and do not constitute a limitation to the application, we can also use nine groups of VR detection systems 3 to collect image and analyze, and more VR detection systems 3 are used for detection,

[0040] The above device detects by the following steps:

[0041] Step one: five detection marks are designed on the image for detection, generally one in the center of image, then one in each of four corners, and the image with detection mark is input into screen, and the detection mark can be dot or cross line,

[0042] Step two: the position of each VR detection system 3 is adjusted by detection frame 2, so that the test lens module takes partial image containing detection mark through VR projection lens 1, and projects onto corresponding industrial camera 34, and the size of partial range is mainly determined according to the field angle of camera optical system 32,

[0043] Step three: the partial image photographed by the industrial camera 34 is transmitted to analysis center, and the analysis center analyzes and compares, so as to judge whether VR projection lens 1 is in line with standard, and the comparison and analysis method is same as before, so the application will not be described in detail.

[0044] As shown in Figure 3 and Figure 7 In the application, the test lens module for realizing the method includes symmetrical optical system 31 and camera optical system 32 arranged along optical axis, the camera optical system 32 takes partial image containing detection mark through symmetrical optical system 31 and VR projection lens 1, and projects onto corresponding industrial camera 34.

[0045] The image position 5 of the virtual image generated by the screen is located on one side of the optical system 3, while the VR projection lens 1 is located between the image position 5 of the virtual image and the optical system 3. The industrial camera 34 used in this test is a dedicated industrial camera 34 without its own lens.

[0046] like Figure 4 As shown, the symmetrical optical system 31 includes a lens group one and a lens group two. The lens group one includes lens 8, lens 9, lens 3 10, and lens 4 11. The lens group two includes lens 5 12, lens 6 13, lens 7 14, and lens 8 15. Lens 8 and lens 8 15 have the same structure and are symmetrically arranged with respect to the virtual plane. Lens 9 and lens 7 14 have the same structure and are symmetrically arranged with respect to the virtual plane. Lens 3 10 and lens 6 13 have the same structure and are symmetrically arranged with respect to the virtual plane. Lens 4 11 and lens 5 12 have the same structure and are symmetrically arranged with respect to the virtual plane. The virtual plane is located at the center between lens group one and lens group two and is perpendicular to the optical axis. The symmetrical optical system 31 mirrors the virtual image of the VR glasses onto the entrance pupil 7 of the camera optical system 32, thereby increasing the distance between the VR glasses and the detection system.

[0047] As shown in the figure, lens 1 (8) and lens 8 (15) are biconcave lenses; lens 2 (9), lens 4 (11), lens 5 (12), and lens 7 (14) are biconvex lenses; lens 3 (10) and lens 6 (13) are convex-concave lenses; lens 1 (8) is a negative focal lens with equal curvature values ​​on both surfaces; lens 2 (9) is a positive focal lens with the surface having a smaller radius of curvature facing the VR projection lens 1 and the surface having a larger radius of curvature facing the industrial camera 34; lens 3 (10) is a negative focal lens with its convex surface facing the VR projection lens 1 and its concave surface facing the industrial camera 34; and lens 4 (11) is a positive focal lens. Furthermore, the surface with the larger radius of curvature value faces the VR projection lens 1, while the surface with the smaller radius of curvature value faces the industrial camera 34; the fifth lens 12 is a positive focal lens with the surface with the smaller radius of curvature value facing the VR projection lens 1 and the surface with the larger radius of curvature value facing the industrial camera 34; the sixth lens 13 is a negative focal lens with its concave surface facing the VR projection lens 1 and its convex surface facing the industrial camera 34; the seventh lens 14 is a positive focal lens with its surface with the larger radius of curvature value facing the VR projection lens 1 and the surface with the smaller radius of curvature value facing the industrial camera 34; and the eighth lens 15 is a negative focal lens with equal curvature values ​​on both surfaces.

[0048] The lens one refractive index range: 1.55-1.75, dispersion coefficient range: 25-45, surface one curvature radius: -110mm-130mm, surface two curvature radius: 110mm-130mm; lens two refractive index range: 1.70-1.90, dispersion coefficient range: 35-55, surface one curvature radius: 50mm-70mm, surface two curvature radius: -80mm-100mm; lens three refractive index range: 1.70-1.90; dispersion coefficient range: 35-55, curvature radius: surface one: 40-60, surface two: 30-50; lens four refractive index range: 1.40-1.6; dispersion coefficient range: 70-90, curvature radius: surface one: 70-90, surface two: -40--60; lens five refractive index range: 1.40-1.6; dispersion coefficient range: 70-90, curvature radius: surface one: 40-60, surface two: -70--90; lens six refractive index range: 1.70-1.90; dispersion coefficient range: 35-55, curvature radius: surface one: -30--50, surface two: -40--60; lens seven refractive index range: 1.70-1.90, dispersion coefficient range: 35-55, surface one curvature radius: 80mm-100mm, surface two curvature radius: -50mm-70mm; lens eight refractive index range: 1.55-1.75, dispersion coefficient range: 25-45, surface one curvature radius: -110mm-130mm, surface two curvature radius: 110mm-130mm.

[0049] As specific data:

[0050] The lens one 8 focal length preferably: f=-90mm; lens two 9 focal length preferably: f=45mm; lens three 10 focal length preferably: f=-300mm; lens four 11 focal length preferably: f=60mm; lens five 12 focal length preferably: f=60mm; lens six 13 focal length preferably: f=-300mm; lens seven 14 focal length preferably: f=45mm; lens eight 15 focal length preferably: f=-90mm.

[0051] The lens one 8 refractive index preferably: 1.65; dispersion coefficient preferably: 35; surface one curvature radius preferably: -120mm, surface two curvature radius preferably: 120mm;

[0052] The lens two 9 refractive index preferably: 1.80; dispersion coefficient preferably: 45; surface one curvature radius preferably: 60mm, surface two curvature radius preferably: -90mm;

[0053] The lens three 10 refractive index preferably: 1.80; dispersion coefficient preferably: 45; surface one curvature radius preferably: 50mm, surface two curvature radius preferably: 40mm;

[0054] Lens 41 has the following preferred features: refractive index: 1.50; dispersion coefficient: 80; radius of curvature of surface 1: 80 mm; radius of curvature of surface 2: -50 mm.

[0055] Lens 5.12 has the following preferred features: refractive index: 1.50; dispersion coefficient: 80; radius of curvature of surface 1: 50mm; radius of curvature of surface 2: -80mm.

[0056] Lens 6.13 has the following preferred features: refractive index: 1.80; dispersion coefficient: 45; radius of curvature of surface 1: -40mm; radius of curvature of surface 2: -50mm.

[0057] Lens 7.14 has the following preferred features: refractive index: 1.80; dispersion coefficient: 45; radius of curvature of surface one: 90 mm; radius of curvature of surface two: -60 mm.

[0058] The preferred refractive index of lens 815 is 1.65; the preferred dispersion coefficient is 35; the preferred radius of curvature of surface one is -120mm, and the preferred radius of curvature of surface two is 120mm.

[0059] The specific lens setup described above enables the working distance of the symmetrical optical system 31 to reach 80mm, meaning that the symmetrical optical system 31 is 80mm away from the VR exit pupil position. The symmetrical optical system mirrors the virtual image of the VR exit pupil position 6 onto the entrance pupil position 7 of the camera optical system 32, so that the projection optical system can receive the virtual image. Therefore, this system can achieve a working distance of 80mm. Previously, the distance from the exit pupil position 6 to the VR glasses was very short, only a few millimeters. The human eye camera could only be placed at this position to receive the virtual image of the VR glasses, which was not conducive to the AA manufacturing process.

[0060] like Figure 5 As shown, the camera optical system 32 includes lens nine 16, lens ten 17, lens eleven 18, lens twelve 19, and lens thirteen 20. Lens eleven 18 is a biconcave lens; lenses nine 16, twelve 19, and thirteen 20 are biconvex lenses; lens ten 17 is a plano-convex lens; lens nine 16 is a positive focal lens with the side with the larger radius of curvature facing the VR projection lens 1 and the side with the smaller radius of curvature facing the industrial camera 34; lens ten 17 is a positive focal lens with its convex surface facing the VR projection lens 1 and its planar surface facing the industrial camera 34; lens eleven 18 is a negative focal lens with its side with the larger radius of curvature facing the VR projection lens 1 and the side with the smaller radius of curvature facing the industrial camera 34; lens twelve 19 is a positive focal lens with its side with the larger radius of curvature facing the VR projection lens 1 and the side with the smaller radius of curvature facing the industrial camera 34; and lens thirteen 20 is a positive focal lens with its side with the larger radius of curvature facing the VR projection lens 1 and the side with the smaller radius of curvature facing the industrial camera 34.

[0061] The lens nine 16 has a refractive index range of 1.60-1.80 and a dispersion coefficient range of 40-60, and a curvature radius of face one: 45-65, and face two: -5--25; the lens ten 17 has a refractive index range of 1.75-1.95 and a dispersion coefficient range of 10-30, and a curvature radius of face one: 10-30, and face two: plane; the lens eleven 18 has a refractive index range of 1.50-1.70 and a dispersion coefficient range of 50-70, and a curvature radius of face one: -120--140, and face two: 70-90; the lens twelve 19 has a refractive index range of 1.55-1.75 and a dispersion coefficient range of 40-60, and a curvature radius of face one: 90-110, and face two: -60--80; the lens thirteen 20 has a refractive index range of 1.40-1.60 and a dispersion coefficient range of 70-90, and a curvature radius of face one: 40-60, and face two: -20--40.

[0062] As specific data:

[0063] The lens nine 16 has a focal length of preferably f=10mm; the lens ten 17 has a focal length of preferably f=20mm; the lens eleven 18 has a focal length of preferably f=-80mm; the lens twelve 19 has a focal length of preferably f=60mm; and the lens thirteen 20 has a focal length of preferably f=40mm.

[0064] The lens nine 16 has a refractive index of preferably 1.70, a dispersion coefficient of preferably 50, a curvature radius of face one of preferably 55mm, and a curvature radius of face two of preferably -15mm;

[0065] The lens ten 17 has a refractive index of preferably 1.85, a dispersion coefficient of preferably 20, and a curvature radius of face one of preferably 20mm;

[0066] The lens eleven 18 has a refractive index of preferably 1.60, a dispersion coefficient of preferably 60, a curvature radius of face one of preferably -130mm, and a curvature radius of face two of preferably 80mm;

[0067] The lens twelve 19 has a refractive index of preferably 1.65, a dispersion coefficient of preferably 50, a curvature radius of face one of preferably 100mm, and a curvature radius of face two of preferably -70mm;

[0068] The lens thirteen 20 has a refractive index of preferably 1.50, a dispersion coefficient of preferably 80, a curvature radius of face one of preferably 50mm, and a curvature radius of face two of preferably -30mm;

[0069] In the above, face one represents Figure 3 the left side surface of each lens, and face two represents Figure 3 the right side surface of each lens.

[0070] The present test system divides the overall test into partial tests, so the field angle does not need to be large, and the aberration can be corrected to be very small, such asFigure 9 and 10 As shown, the test system exhibits very small distortion and field curvature, excellent MTF, and minimal additional aberrations during testing, resulting in more accurate test results.

[0071] like Figure 8 As shown, the detection frame 2 specifically includes a base plate 21, a central adjustment plate 22, and several arc-shaped frame plates 23. The arc-shaped frame plates 23 are arc-shaped and can be connected to the central adjustment plate 22 and the base plate 21 by screws. The arc-shaped frame plates 23 have several equally spaced, arc-shaped adjustment holes 24. The VR detection system 3 has two mounting plates 25, forming a slot in the middle. The arc-shaped frame plates 23 can be locked into the slot. The mounting plates 25 have two screw holes. A threaded handle 26 engages with the screw holes and passes through the corresponding adjustment holes 24 to lock the mounting plates 25 and the arc-shaped frame plates 23. Through this structure, the VR detection system 3 can be adjusted... The VR detection system 3 can be easily and simply detached by loosening the threaded handle 26, as the height position on the arc-shaped frame 23 and the angle of the VR detection system 3 are both determined by the height position on the arc-shaped frame 23 and the angle of the VR detection system 3. As a further preferred structure, the upper end of the arc-shaped frame 23 is provided with an upper foot plate 27 and the lower end of the arc-shaped frame 23 is provided with a lower foot plate 28. Both the upper foot plate 27 and the lower foot plate 28 are provided with arc-shaped elongated holes. The upper foot plate 27 is fixed to the central adjustment plate 22 by passing the threaded handle 26 through the corresponding arc-shaped elongated hole, while the lower foot plate 28 is fixed to the base plate 21 by passing screws through the corresponding arc-shaped elongated holes. In this way, we can adjust the position of the arc-shaped frame 23 within a certain range, thereby adjusting the position of the VR detection system 3.

[0072] like Figure 6As shown, the application includes a test box 33, in order to facilitate integration, the industrial camera 34 and the test lens module are installed in the test box 33, as a further structure, the application can also be provided with a motion module (not shown in the figure), the camera optical system 32 or the industrial camera 34 is arranged on the motion module, and moves forward and backward along the optical axis by the motion module, in the application, the camera optical system 32 is connected with the motion module to move, so that the distance between the industrial camera 34 and the camera optical system 32 changes, the specific structure is that the symmetric optical system 31 is arranged at the front end of the large lens barrel, the camera optical system 32 is arranged in the small lens barrel, and the end of the small lens barrel is located in the large lens barrel, the motion module is connected with the small lens barrel, so as to drive the small lens barrel to move along the central axis of the large lens barrel, the motion module includes a motor, a screw assembly and a guide rail assembly, so they are all conventional elements in the mechanical field, and the installation structure and motion principle of the motor, the screw assembly and the guide rail assembly are clear to those skilled in the art, which will not be described in detail. By accurately controlling the motion precision, the distance between the industrial camera 34 and the camera optical system 32 changes, so that the optical path changes to realize the change of the simulated distance. And the MTF obtained by using the human eye camera 200 needs to be compared with the image MTF corresponding to the distance photographed directly by the industrial camera, in order to evaluate the imaging quality corresponding to the simulated distance, because the distance photographed by the industrial camera is large, the photographed image is also large, and a very large space is required.

[0073] In summary, the test lens module has the following advantages:

[0074] 1. The working distance between the detection system and the VR glasses is enlarged to 80mm, which is beneficial to the AA process.

[0075] 2. The distance between the camera optical system and the front symmetric optical system in the detection system corresponds to the simulated distance to be tested, so when the simulated distance changes, only the distance between the camera optical system and the front symmetric optical system needs to be adjusted, and the MTF corresponding to the simulated distance can be directly tested, without the need to compare the MTF with the photographed distance, which greatly shortens the test space and realizes the shortening function.

[0076] 3. The detection system adopts a local detection method, which reduces the cost and speeds up the test speed.

[0077] The VR projection lens module virtual image combined analysis type detection method provided by the embodiment of the application is described in detail, specific examples are applied to explain the principle and implementation mode of the application, and the above embodiment is only used to help understand the method and core idea of the application; meanwhile, for those skilled in the art, according to the idea of the application, the specific implementation mode and application range can be changed, and the above description should not be understood as a limitation of the application.

Claims

1. A VR projection lens module virtual image combination analysis detection method, characterized in that: The device includes an analysis center, a screen, a VR projection lens, a testing rack, and several VR testing systems mounted on the testing rack. The VR projection lens is placed on the testing table. The VR testing system includes an industrial camera without a lens and a test lens module. This device performs testing through the following steps: Step 1: Design several detection markers on the image to be detected, and input the image with the detection markers into the screen. Step 2: Adjust the position of each VR inspection system using the inspection frame so that the test lens module captures a local image containing the inspection mark through the VR projection lens and projects it onto the corresponding lensless industrial camera. Step 3: The lensless industrial camera transmits the captured partial images to the analysis center, where they are analyzed and compared to determine whether the VR projection lens meets the standards. The test lens module includes a symmetrical optical system and a camera optical system arranged along the optical axis. The camera optical system acquires a local image containing the detection mark through the symmetrical optical system and a VR projection lens, and projects it onto a corresponding lensless industrial camera. The symmetrical optical system includes lens group one and lens group two. Lens group one includes lens one, lens two, lens three, and lens four. Lens group two includes lens five, lens six, lens seven, and lens eight. Lens one and lens eight have the same structure and are symmetrically arranged with respect to the virtual plane; lens two and lens seven have the same structure and are symmetrically arranged with respect to the virtual plane; lens three and lens six have the same structure and are symmetrically arranged with respect to the virtual plane; lens four and lens five have the same structure and are symmetrically arranged with respect to the virtual plane. The virtual plane is located at the center between lens group one and lens group two and is perpendicular to the optical axis. Lens 1 and Lens 8 are biconcave lenses; Lens 2, Lens 4, Lens 5, and Lens 7 are biconvex lenses; Lens 3 and Lens 6 are convex-concave lenses; Lens 1 is a negative focal lens with equal curvature values ​​on both sides; Lens 2 is a positive focal lens with the side with smaller curvature radius facing the lens being tested and the side with larger curvature radius facing the industrial camera without a lens. Lens 3 is a negative focal lens with its convex surface facing the lens under test and its concave surface facing the industrial camera without a lens; Lens 4 is a positive focal lens with its surface having a larger radius of curvature facing the lens under test and its surface having a smaller radius of curvature facing the industrial camera without a lens; Lens 5 is a positive focal lens with its surface having a smaller radius of curvature facing the lens under test and its surface having a larger radius of curvature facing the industrial camera without a lens; Lens 6 is a negative focal lens with its concave surface facing the lens under test and its convex surface facing the industrial camera without a lens. Lens 7 is a positive focal lens with the side having a larger radius of curvature facing the lens being tested and the side having a smaller radius of curvature facing the industrial camera without a lens; lens 8 is a negative focal lens with equal curvature values ​​on both sides.

2. The VR projection lens module virtual image combination analysis detection method according to claim 1, characterized in that: The testing frame includes a base plate, a central adjustment plate, and several arc-shaped frame plates. The arc-shaped frame plates are connected to the central adjustment plate and the base plate by screws, and several adjustment holes are provided on the arc-shaped frame plates. The VR testing system is provided with a mounting plate, and the mounting plate is locked to the arc-shaped frame plates by threaded handles passing through the corresponding adjustment holes.

3. The VR projection lens module virtual image combination analysis detection method according to claim 1, characterized in that: The refractive index range of lens 1 is 1.55–1.75, the dispersion coefficient range is 25–45, the radius of curvature of surface 1 is -110 mm to -130 mm, and the radius of curvature of surface 2 is 110 mm to 130 mm; the refractive index range of lens 2 is 1.70–1.90, the dispersion coefficient range is 35–55, the radius of curvature of surface 1 is 50 mm to 70 mm, and the radius of curvature of surface 2 is -80 mm to -100 mm; the refractive index range of lens 3 is 1.70–1.90, the dispersion coefficient range is 35–55, and the radius of curvature is 40–60 for surface 1 and 30–50 for surface 2; the refractive index range of lens 4 is 1.40–1.6, the dispersion coefficient range is 70–90, and the radius of curvature is 70–90 for surface 1 and -40–60 for surface 2; the refractive index range of lens 5 is 1.40–1.6, and the dispersion coefficient range is 70 mm to -60 for surface 2. ~90, radius of curvature: Surface 1: 40~60, Surface 2: -70~-90; Lens 6 refractive index range: 1.70~1.90; dispersion coefficient range: 35~55, radius of curvature: Surface 1: -30~-50, Surface 2: -40~-60; Lens 7 refractive index range: 1.70~1.90, dispersion coefficient range: 35~55, radius of curvature of Surface 1: 80mm~100mm, radius of curvature of Surface 2: -50 mm~-70mm; Lens 8 refractive index range: 1.55~1.75, dispersion coefficient range: 25~45, surface one curvature radius: -110mm~-130mm, surface two curvature radius: 110mm~130mm.

4. The VR projection lens module virtual image combination analysis detection method according to claim 1, characterized in that: The focal lengths of the following lenses are described: Lens 1: f=-90mm; Lens 2: f=45mm; Lens 3: f=-300mm; Lens 4: f=60mm; Lens 5: f=60mm; Lens 6: f=-300mm; Lens 7: f=45mm; Lens 8: f=-90mm.

5. The VR projection lens module virtual image combination analysis detection method according to claim 1, characterized in that: The camera optical system includes lens nine, lens ten, lens eleven, lens twelve, and lens thirteen. Lens eleven is a biconcave lens, and lenses nine, twelve, and thirteen are biconvex lenses. Lens ten is a plano-convex lens. Lens nine is a positive focal lens with its larger radius of curvature facing the lens being tested and its smaller radius of curvature facing the industrial camera without a lens. Lens ten is a positive focal lens with its convex surface facing the lens being tested and its planar surface facing the industrial camera without a lens. The lens eleven is a negative focal lens, with the side with a larger radius of curvature facing the lens being tested and the side with a smaller radius of curvature facing the industrial camera without a lens. Lens 12 is a positive focal lens with the side having a larger radius of curvature facing the lens being tested and the side having a smaller radius of curvature facing the industrial camera without a lens; lens 13 is a positive focal lens with the side having a larger radius of curvature facing the lens being tested and the side having a smaller radius of curvature facing the industrial camera without a lens.

6. The VR projection lens module virtual image combination analysis detection method according to claim 5, characterized in that: Lens 9 has a refractive index range of 1.60–1.80 and a dispersion coefficient range of 40–60; its radius of curvature is 45–65 for surface one and -5–-25 for surface two. Lens 10 has a refractive index range of 1.75–1.95 and a dispersion coefficient range of 10–30; its radius of curvature is 10–30 for surface one and flat for surface two. Lens 11 has a refractive index range of 1.50–1.70 and a dispersion coefficient range of 50–70. Radius of curvature: Surface 1: -120~-140, Surface 2: 70~90; Lens 12 refractive index range: 1.55~1.75; dispersion coefficient range: 40~60, radius of curvature: Surface 1: 90~110, Surface 2: -60~-80; Lens 13 refractive index range: 1.40~1.60; dispersion coefficient range: 70~90, radius of curvature: Surface 1: 40~60, Surface 2: -20~-40.

7. The VR projection lens module virtual image combination analysis detection method according to claim 5, characterized in that: The focal lengths of the following lenses are as follows: Lens 9: f=10mm; Lens 10: f=20mm; Lens 11: f=-80mm; Lens 12: f=60mm; Lens 13: f=40mm.

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