Lens device eccentricity detection method and lens device eccentricity detection device

Abstract

The invention discloses a lens device eccentricity detection method, and relates to the field of optical detection equipment, and the method comprises the steps: obtaining a simulation light source, a simulation lens and a simulation light screen through an optical simulation method, enabling a light beam of the simulation light source to enter the simulation lens, and forming an ideal light spot on the simulation light screen; acquiring a test light source, a test lens and a test light screen, and enabling a light beam of the test light source to enter the test lens and form a test light spot on the test light screen under the same test condition as the optical simulation test; the offset of the test light spot relative to the ideal light spot in the first direction and the second direction is obtained, the first direction is perpendicular to the second direction, and the length and the width of the ideal light spot are obtained; acquiring the length and the width of the test light spot; the eccentric value of the test lens in the first direction is obtained through a formula 1, and the eccentric value of the test lens in the second direction is obtained through a formula 2. The invention further provides a lens device eccentricity detection device used for the lens device eccentricity detection method. The test accuracy can be improved.

Description

Technical Field

[0001] The present invention relates to the technical field of optical detection devices, and particularly to a method for detecting the eccentricity of a lens device and a device for detecting the eccentricity of a lens device. Background Art

[0002] A compound eye lens is a type of lens device. A compound eye lens is formed by combining a series of small lenses. Applying a compound eye lens (such as a double-row compound eye lens array) to an illumination system can achieve high light energy utilization and uniform illumination over a large area. For the compound eye lens array to achieve uniform illumination, two columns of compound eye lens arrays need to be arranged in parallel. The focal points of the individual small unit lenses in the first column of compound eye position lens array elements coincide with the centers of the corresponding small unit lenses in the second column of compound eye lens arrays, and the optical axes of the two columns of compound eye lenses are parallel to each other. However, in actual production, the centers of the lenses in the two arrays cannot completely coincide. This offset of the centers is eccentricity, which can be represented by the offset amounts in the X and Y directions. Eccentricity will affect the effect of the compound eye lens to a certain extent, so accurate measurement of eccentricity is required.

[0003] At present, the detection of the eccentricity of a compound eye lens device mainly relies on a reverse transmission type eccentricity meter. Its core principle is based on the reflection and transmission phenomena of light. When a beam of light is incident on the surface of a compound eye lens, the transmitted light or reflected light of the compound eye lens can be received and processed by the photosensitive coupling component (CCD element) of the reverse transmission type eccentricity meter, obtaining the spot information of the light after it is incident on the compound eye lens, and comparing the obtained spot information with the standard coordinate axis to obtain the eccentricity value of the lens. However, this method is generally applicable to single lenses or lens groups with a larger aperture. For a microlens array, since the aperture of the unit lenses in the microlens array is very small, the light may be incident on adjacent unit lenses during the test, resulting in refraction and reflection, causing great interference to the results and unable to meet the test requirements of the microlens array. Summary of the Invention

[0004] The purpose of the present invention is to provide a method for detecting the eccentricity of a lens device and a device for detecting the eccentricity of a lens device to solve the problems existing in the prior art and have high test accuracy.

[0005] To achieve the above object, the present invention provides the following solutions:

[0006] The present invention provides a method for detecting the eccentricity of a lens device, including the following steps:

[0007] Obtain a simulated light source, a simulated lens, and a simulated light screen through an optical simulation test method, and make the light beam of the simulated light source be incident on the simulated lens through an optical simulation method to form an ideal spot on the simulated light screen;

[0008] Obtain a test light source, a test lens, and a test light screen. Under the same test conditions as the optical simulation test, make the light beam of the test light source incident on the test lens and form a test light spot on the test light screen;

[0009] Obtain the offsets of the test light spot relative to the ideal light spot in a first direction and a second direction, where the first direction and the second direction are perpendicular to each other; obtain the length and width of the ideal light spot; obtain the length and width of the test light spot; obtain the eccentricity value of the test lens in the first direction through Formula 1, and obtain the eccentricity value of the test lens in the second direction through Formula 2;

[0010]

[0011] where Δx and Δy are the eccentricity values of the test lens in the first direction and the second direction respectively, x and y are the length and width of the test light spot respectively, X and Y are the length and width of the ideal light spot respectively, and ΔX and ΔY are the offsets of the test light spot relative to the ideal light spot in the first direction and the second direction respectively.

[0012] Preferably, the same test conditions as the optical simulation test include: the distance between the test light source and the test lens is the same as the distance between the simulation light source and the simulation lens; the distance between the test lens and the test light screen is the same as the distance between the simulation lens and the simulation light screen; the light beam transmission direction of the test light source is the same as the light beam transmission direction of the simulation light source; the included angle between the test light screen and the light beam transmission direction of the test light source is a first included angle, the included angle between the simulation light screen and the light beam transmission direction of the simulation light source is a second included angle, and the first included angle is the same as the second included angle; the included angle between the center line of the test lens and the test light screen is a third included angle, the included angle between the center line of the simulation lens and the simulation light screen is a fourth included angle, and the third included angle is the same as the fourth included angle.

[0013] Preferably, it further includes: when performing optical simulation, making the light beam transmission direction of the simulation light source, the center line of the simulation lens, and the center line of the simulation light screen all collinear, and making the light beam transmission direction of the simulation light source perpendicular to the simulation light screen.

[0014] Preferably, it further includes: before testing the test lens, adjusting the height and / or angle of the emission end of the test light source, adjusting the height and / or angle of the test lens, and adjusting the height and / or angle of the test light screen, so that the light beam transmission direction of the test light source, the center line of the test lens, and the center line of the test light screen are all collinear, and making the light beam transmission direction of the test light source perpendicular to the test light screen.

[0015] Preferably, the method for making the beam transmission direction of the test light source collinear with the center line of the test light screen and perpendicular to the test light screen includes: arranging the test light source and the test light screen along a preset direction, adjusting the angle of the emitting end of the test light source until the image point of the test light source on the test light screen remains stationary during the process of moving the test light screen forward and backward;

[0016] Adjust the height and angle of the test light screen so that the image point of the test light source on the test light screen is located at the center of the test light screen, and the reflected light after the test light source irradiates the test light screen coincides with the beam emitted by the test light source.

[0017] Preferably, the method for making the center line of the test lens collinear with the beam transmission direction of the test light source includes: arranging the test lens between the test light source and the test light screen, and arranging the test light source, the test lens and the test light screen in sequence along the preset direction, adjusting the height and angle of the test lens so that the image point of the test light source on the test lens is located at the center of the test lens, and the reflected light after the test light source irradiates the test lens coincides with the beam emitted by the test light source.

[0018] Preferably, it further includes: before testing the test lens, adjusting at least one of the test light source, the test lens and the test light screen along the preset direction so that the distance between the test light source and the test lens is the same as the distance between the simulation light source and the simulation lens, and the distance between the test lens and the test light screen is the same as the distance between the simulation lens and the simulation light screen.

[0019] Preferably, the test conditions identical to those of the optical simulation test further include: the light source parameters of the simulation light source and the test light source are the same.

[0020] Preferably, the test conditions identical to those of the optical simulation test further include: the parameters of the simulation lens and the test lens are the same.

[0021] The present invention also provides a lens device eccentricity detection device for a lens device eccentricity detection method, including a support platform, a light source bracket, a lens bracket, and a light screen bracket. The light source bracket, the lens bracket, and the light screen bracket are sequentially arranged on the support platform along the preset direction, and the light source bracket, the lens bracket, and the light screen bracket can all be arranged at different positions on the support platform; the light source bracket includes a first telescopic rod and a first connecting component. One end of the first telescopic rod is connected to the support platform, and the other end of the first telescopic rod forms a rotational connection around the axis of the first telescopic rod with the first connecting component. The first connecting component is used to connect to the test light source; the lens bracket includes a second telescopic rod and a second connecting component. One end of the second telescopic rod is connected to the support platform, and the other end of the second telescopic rod forms a rotational connection around the axis of the second telescopic rod with the second connecting component. The second connecting component is used to connect to the test lens; the light screen bracket includes a third telescopic rod and a third connecting component. One end of the third telescopic rod is connected to the support platform, and the other end of the third telescopic rod forms a rotational connection around the axis of the third telescopic rod with the third connecting component. The third connecting component is used to connect to the test light source.

[0022] The present invention has achieved the following technical effects compared with the prior art:

[0023] The present invention provides a lens device eccentricity detection method and a lens device eccentricity detection device, including the following steps: obtaining a simulated light source, a simulated lens, and a simulated light screen through an optical simulation test method, and making the light beam of the simulated light source incident on the simulated lens through the optical simulation method to form an ideal light spot on the simulated light screen; obtaining a test light source, a test lens, and a test light screen, and making the light beam of the test light source incident on the test lens under the same test conditions as the optical simulation test to form a test light spot on the test light screen; obtaining the offsets of the test light spot relative to the ideal light spot in the first direction and the second direction, where the first direction and the second direction are perpendicular to each other; obtaining the length and width of the ideal light spot; obtaining the length and width of the test light spot; obtaining the eccentricity value of the test lens in the first direction through formula 1, and obtaining the eccentricity value of the test lens in the second direction through formula 2;

[0024]

[0025] Wherein, Δx and Δy are the decentration values of the test lens in the first direction and the second direction respectively, x and y are the length and width of the test light spot respectively, X and Y are the length and width of the ideal light spot respectively, and ΔX and ΔY are the offsets of the test light spot relative to the ideal light spot in the first direction and the second direction respectively. If the test lens has decentration in the X-axis direction (the first direction) or the Y-axis direction (the second direction), then the imaging light spot (the test light spot) of the test lens will also have corresponding offsets in the X-axis direction (the first direction) or the Y-axis direction (the second direction), and there is a definite linear relationship between the offset of the imaging light spot of the test lens in the X-axis direction (the first direction) or the Y-axis direction (the second direction) and the decentration of the corresponding axis of the test lens as shown in Formula 1 and Formula 2. Therefore, the ideal light spot is obtained by means of optical simulation, and the test lens is tested under the same test conditions to obtain the test light spot. Through Formula 1 and Formula 2, the decentration value of the test lens can be obtained, and the test accuracy is high. BRIEF DESCRIPTION OF THE DRAWINGS

[0026] In order to more clearly illustrate the technical solutions in the embodiments of the present invention or the prior art, the following will briefly introduce the drawings required for use in the embodiments. Obviously, the drawings in the following description are only some embodiments of the present invention. For those of ordinary skill in the art, other drawings can be obtained based on these drawings without creative efforts.

[0027] Figure 1 It is a schematic structural diagram of the lens device decentration detection device provided in Embodiment 2;

[0028] Figure 2 It is a schematic diagram of the offset of the test light spot relative to the simulated light spot provided in Embodiment 1;

[0029] Figure 3 It is a schematic structural diagram of the lens bracket provided in Embodiment 2;

[0030] In the figure: 100, lens device decentration detection device; 1, ideal light spot; 2, test light source; 3, test lens; 4, test light screen; 5, test light spot; 6, support platform; 7, first telescopic rod; 8, first connecting member; 9, second telescopic rod; 10, second connecting member; 11, third telescopic rod; 12, third connecting member. DETAILED DESCRIPTION OF THE EMBODIMENTS

[0031] The following will clearly and completely describe the technical solutions in the embodiments of the present invention with reference to the drawings in the embodiments of the present invention. Obviously, the described embodiments are only some embodiments of the present invention, rather than all embodiments. All other embodiments obtained by those of ordinary skill in the art based on the embodiments of the present invention without creative efforts belong to the scope of protection of the present invention.

[0032] The object of the present invention is to provide a method and a device for detecting the eccentricity of a lens device, so as to solve the problems existing in the prior art and have high test accuracy.

[0033] In order to make the above objects, features and advantages of the present invention more obvious and understandable, the present invention will be further described in detail below with reference to the accompanying drawings and specific embodiments.

[0034] Embodiment 1

[0035] As Figures 1 to 3 shown, this embodiment provides a method for detecting the eccentricity of a lens device, including the following steps:

[0036] Obtain a simulated light source, a simulated lens and a simulated light screen through an optical simulation test method, and make the light beam of the simulated light source incident on the simulated lens through the optical simulation method to form an ideal light spot 1 on the simulated light screen;

[0037] Obtain a test light source 2, a test lens 3 and a test light screen 4, and make the light beam of the test light source 2 incident on the test lens 3 to form a test light spot 5 on the test light screen 4 under the same test conditions as the optical simulation test;

[0038] Obtain the offset amounts of the test light spot 5 relative to the ideal light spot 1 in the first direction and the second direction, where the first direction and the second direction are perpendicular to each other. As a preferred embodiment, the first direction is the horizontal direction of the test light screen 4, and the second direction is the longitudinal direction of the test light screen 4; obtain the length and width of the ideal light spot 1; obtain the length and width of the test light spot 5; obtain the eccentricity value of the test lens 3 in the first direction through Formula 1, and obtain the eccentricity value of the test lens 3 in the second direction through Formula 2;

[0039]

[0040] Wherein, Δx and Δy are the decentration values of the test lens 3 in the first direction and the second direction respectively, x and y are the length and width of the test light spot 5 respectively, X and Y are the length and width of the ideal light spot 1 respectively, and ΔX and ΔY are the offsets of the test light spot 5 relative to the ideal light spot 1 in the first direction and the second direction respectively. If the test lens 3 has decentration in the X-axis direction (the first direction) or the Y-axis direction (the second direction), then the imaging light spot (the test light spot 5) of the test lens 3 will also have corresponding offsets in the X-axis direction (the first direction) or the Y-axis direction (the second direction), and there is a definite linear relationship between the offset of the imaging light spot of the test lens 3 in the X-axis direction (the first direction) or the Y-axis direction (the second direction) and the decentration of the corresponding axis of the test lens 3 as shown in Formula 1 and Formula 2. Therefore, the ideal light spot 1 is obtained by means of optical simulation, and the test lens 3 is tested under the same test conditions, so as to obtain the test light spot 5. Through Formula 1 and Formula 2, the decentration value of the test lens 3 can be obtained, and the test accuracy is high.

[0041] As a preferred embodiment, the method for obtaining the offsets of the test light spot 5 relative to the ideal light spot 1 in the first direction and the second direction includes: drawing the ideal light spot 1 or the contour of the ideal light spot 1 on the test light screen 4, and making the position of the drawn ideal light spot 1 on the test light screen 4 the same as the position of the ideal light spot 1 on the simulation light screen during the optical simulation test, and measuring the offsets of the test light spot 5 relative to the drawn ideal light spot 1 in the first direction and the second direction; both the ideal light spot 1 and the test light spot 5 are rectangular light spots, ΔX is the offset of the vertical edge of the test light spot 5 relative to the vertical edge of the drawn ideal light spot 1, and ΔY is the offset of the horizontal edge of the test light spot 5 relative to the horizontal edge of the drawn ideal light spot 1.

[0042] In this embodiment, the test conditions the same as those in the optical simulation test include: the distance between the test light source 2 and the test lens 3 is the same as the distance between the simulation light source and the simulation lens; the distance between the test lens 3 and the test light screen 4 is the same as the distance between the simulation lens and the simulation light screen; the beam transmission direction of the test light source 2 is the same as the beam transmission direction of the simulation light source; the included angle between the test light screen 4 and the beam transmission direction of the test light source 2 is the first included angle, and the included angle between the simulation light screen and the beam transmission direction of the simulation light source is the second included angle, and the first included angle is the same as the second included angle; the included angle between the center line of the test lens 3 and the test light screen 4 is the third included angle, and the included angle between the center line of the simulation lens and the simulation light screen is the fourth included angle, and the third included angle is the same as the fourth included angle.

[0043] In this embodiment, it further includes: during the optical simulation, making the beam transmission direction of the simulation light source, the center line of the simulation lens and the center line of the simulation light screen collinear, and making the beam transmission direction of the simulation light source perpendicular to the simulation light screen, so as to ensure the accuracy of detection.

[0044] In this embodiment, it further includes: before testing the test lens 3, adjusting the height and / or angle of the emitting end of the test light source 2, adjusting the height and / or angle of the test lens 3, and adjusting the height and / or angle of the test light screen 4, so that the light beam transmission direction of the test light source 2, the center line of the test lens 3, and the center line of the test light screen 4 are all collinear, and the light beam transmission direction of the test light source 2 is perpendicular to the test light screen 4.

[0045] In this embodiment, the method for making the light beam transmission direction of the test light source 2 collinear with the center line of the test light screen 4 and the light beam transmission direction of the test light source 2 perpendicular to the test light screen 4 includes: arranging the test light source 2 and the test light screen 4 along a preset direction, adjusting the angle of the emitting end of the test light source 2 until the image point of the test light source 2 on the test light screen 4 does not move during the process of moving the test light screen 4 back and forth. At this time, the light beam of the test light source 2 is adjusted to be collimated; adjusting the height and angle of the test light screen 4 so that the image point of the test light source 2 irradiated on the test light screen 4 is located at the center of the test light screen 4, and the reflected light of the test light source 2 after irradiating the test light screen 4 coincides with the light beam emitted by the test light source 2, thereby ensuring that the height of the emitting end of the test light source 2 is the same as the center height of the test light screen 4, and the light beam of the test light source 2 is perpendicular to the test light screen 4.

[0046] As a preferred implementation manner, if the reflected light spot of the test light source 2 after irradiating the test light screen 4 coincides with the light spot emitted by the test light source 2, then the reflected light of the test light source 2 after irradiating the test light screen 4 coincides with the light beam emitted by the test light source 2. The center of the drawn ideal light spot 1 coincides with the center of the test light screen 4, and the image point of the test light source 2 irradiated on the test light screen 4 is located at the center of the drawn ideal light spot 1, then the image point of the test light source 2 irradiated on the test light screen 4 is located at the center of the test light screen 4.

[0047] In this embodiment, the method for making the center line of the test lens 3 collinear with the light beam transmission direction of the test light source 2 includes: setting the test lens 3 between the test light source 2 and the test light screen 4, and arranging the test light source 2, the test lens 3, and the test light screen 4 in sequence along a preset direction, adjusting the height and angle of the test lens 3 so that the image point of the test light source 2 irradiated on the test lens 3 is located at the center of the test lens 3, and the reflected light of the test light source 2 after irradiating the test lens 3 coincides with the light beam emitted by the test light source 2.

[0048] In this embodiment, it further includes: before testing the test lens 3, adjusting at least one of the test light source 2, the test lens 3, and the test light screen 4 along a preset direction, so that the distance between the test light source 2 and the test lens 3 is the same as the distance between the simulation light source and the simulation lens, and the distance between the test lens 3 and the test light screen 4 is the same as the distance between the simulation lens and the simulation light screen.

[0049] In this embodiment, the test conditions identical to those of the optical simulation test further include: the light source parameters of the simulated light source and the test light source 2 are the same. As a preferred embodiment, the spot sizes and divergence angles of the simulated light source and the test light source 2 need to be the same.

[0050] In this embodiment, the test conditions identical to those of the optical simulation test further include: the parameters of the simulated lens and the test lens 3 are the same. As a preferred embodiment, for a compound eye lens, the parameters that need to be ensured the same for the simulated lens and the test lens 3 include the external dimensions (length, width, thickness), the length and width of the sub-eyes, the radius of curvature of the sub-eyes, the arrangement pattern of the sub-eyes, etc. The size of the simulated light screen is larger than the size of the ideal spot 1, and the size of the test light screen 4 is larger than the size of the test spot 5, so as to ensure that a complete ideal spot 1 and test spot 5 can be formed on the simulated light screen and the test light screen 4 respectively.

[0051] As a preferred embodiment, the test light source 2 is a laser pen. The test lens is an array of compound eye lenses. It should be noted that the detection method provided in this embodiment is not limited to the eccentricity test of the array of compound eye lenses, and can also perform the eccentricity test on other combined lenses.

[0052] Embodiment 2

[0053] This embodiment provides a lens device eccentricity detection device 100 for the lens device eccentricity detection method in Embodiment 1, including a support platform 6, a light source bracket, a lens bracket, and a light screen bracket. The light source bracket, the lens bracket, and the light screen bracket are sequentially arranged on the support platform 6 along a preset direction, and the light source bracket, the lens bracket, and the light screen bracket can all be arranged at different positions on the support platform 6; the light source bracket includes a first telescopic rod 7 and a first connecting member 8. One end of the first telescopic rod 7 is connected to the support platform 6, and the other end of the first telescopic rod 7 forms a rotational connection with the first connecting member 8 around the axis of the first telescopic rod 7. The first connecting member 8 is used to connect with the test light source 2; the lens bracket includes a second telescopic rod 9 and a second connecting member 10. One end of the second telescopic rod 9 is connected to the support platform 6, and the other end of the second telescopic rod 9 forms a rotational connection with the second connecting member 10 around the axis of the second telescopic rod 9. The second connecting member 10 is used to connect with the test lens 3; the light screen bracket includes a third telescopic rod 11 and a third connecting member 12. One end of the third telescopic rod 11 is connected to the support platform 6, and the other end of the third telescopic rod 11 forms a rotational connection with the third connecting member 12 around the axis of the third telescopic rod 11. The third connecting member 12 is used to connect with the test light source 2.

[0054] As a preferred embodiment, the support platform 6 is an optical rail, and the light source bracket, the lens bracket, and the light screen bracket are all slidably connected to the optical rail.

[0055] As a preferred embodiment, the second connecting member 10 is a square fixture, including a frame and two cross beams. The frame is provided with two columns of mounting holes. Each column of mounting holes includes a plurality of mounting holes arranged in the vertical direction. One end of each cross beam is detachably and fixedly connected to one mounting hole in one column of mounting holes, and the other end of each cross beam is detachably and fixedly connected to one mounting hole in the other column of mounting holes. After the test lens 3 is placed between the two cross beams, the distance between the two cross beams is adjusted, so that the test lens 3 is clamped by the two cross beams.

[0056] In the present invention, specific examples are used to elaborate on the principle and implementation manner of the present invention. The description of the above embodiments is only used to help understand the method and its core idea of the present invention; at the same time, for those of ordinary skill in the art, according to the idea of the present invention, there will be changes in the specific implementation manner and application scope. In summary, the content of this specification should not be construed as a limitation to the present invention.

Claims

1. A method for detecting eccentricity of a lens device, characterized in that: It includes the following steps: Obtain a simulated light source, a simulated lens, and a simulated light screen through an optical simulation test method. Make the light beam of the simulated light source incident on the simulated lens through the optical simulation method and form an ideal light spot on the simulated light screen; Obtain a test light source, a test lens, and a test light screen. Under the same test conditions as the optical simulation test, make the light beam of the test light source incident on the test lens and form a test light spot on the test light screen; Obtain the offsets of the test light spot relative to the ideal light spot in the first direction and the second direction, where the first direction and the second direction are perpendicular to each other; obtain the length and width of the ideal light spot; obtain the length and width of the test light spot; obtain the eccentricity value of the test lens in the first direction through Formula 1, and obtain the eccentricity value of the test lens in the second direction through Formula 2; Where, Δx and Δy are the eccentricity values of the test lens in the first direction and the second direction respectively, x and y are the length and width of the test light spot respectively, X and Y are the length and width of the ideal light spot respectively, and ΔX and ΔY are the offsets of the test light spot relative to the ideal light spot in the first direction and the second direction respectively.

2. The lens device eccentricity detection method according to claim 1, characterized in that: The same test conditions as the optical simulation test include: the distance between the test light source and the test lens is the same as the distance between the simulated light source and the simulated lens; the distance between the test lens and the test light screen is the same as the distance between the simulated lens and the simulated light screen; the light beam transmission direction of the test light source is the same as the light beam transmission direction of the simulated light source; the included angle between the test light screen and the light beam transmission direction of the test light source is a first included angle, and the included angle between the simulated light screen and the light beam transmission direction of the simulated light source is a second included angle, and the first included angle is the same as the second included angle; the included angle between the center line of the test lens and the test light screen is a third included angle, and the included angle between the center line of the simulated lens and the simulated light screen is a fourth included angle, and the third included angle is the same as the fourth included angle.

3. The lens device eccentricity detection method according to claim 1, wherein: It also includes: When performing optical simulation, make the light beam transmission direction of the simulated light source, the center line of the simulated lens, and the center line of the simulated light screen all collinear, and make the light beam transmission direction of the simulated light source perpendicular to the simulated light screen.

4. The method for detecting eccentricity of the lens device according to claim 2, wherein: It also includes: Before testing the test lens, adjust the height and / or angle of the emission end of the test light source, adjust the height and / or angle of the test lens, and adjust the height and / or angle of the test light screen to make the light beam transmission direction of the test light source, the center line of the test lens, and the center line of the test light screen all collinear, and make the light beam transmission direction of the test light source perpendicular to the test light screen.

5. The method for detecting eccentricity of a lens device according to claim 4, characterized in that: The method for making the beam transmission direction of the test light source collinear with the center line of the test light screen and perpendicular to the test light screen includes: arranging the test light source and the test light screen in a preset direction, adjusting the angle of the emission end of the test light source until the image point of the test light source on the test light screen remains stationary during the process of moving the test light screen forward and backward; Adjusting the height and angle of the test light screen so that the image point of the test light source irradiated on the test light screen is located at the center of the test light screen, and the reflected light after the test light source irradiates the test light screen coincides with the beam emitted by the test light source.

6. The method for detecting eccentricity of a lens device according to claim 5, wherein: The method for making the center line of the test lens collinear with the beam transmission direction of the test light source includes: arranging the test lens between the test light source and the test light screen, and arranging the test light source, the test lens and the test light screen in sequence along the preset direction, adjusting the height and angle of the test lens so that the image point of the test light source irradiated on the test lens is located at the center of the test lens, and the reflected light after the test light source irradiates the test lens coincides with the beam emitted by the test light source.

7. The method for detecting eccentricity of a lens device according to claim 6, wherein: It also includes: Before testing the test lens, adjusting at least one of the test light source, the test lens and the test light screen along the preset direction so that the distance between the test light source and the test lens is the same as the distance between the simulation light source and the simulation lens, and the distance between the test lens and the test light screen is the same as the distance between the simulation lens and the simulation light screen.

8. The eccentric detection method of the lens device according to claim 1, characterized in that: The test conditions identical to those of the optical simulation test also include: the light source parameters of the simulation light source and the test light source are the same.

9. The method for detecting eccentricity of the lens device according to claim 1, characterized in that: The test conditions identical to those of the optical simulation test also include: the parameters of the simulation lens and the test lens are the same.

10. A lens device eccentricity detection apparatus for the lens device eccentricity detection method according to claim 7, characterized in that: It includes a support platform, a light source bracket, a lens bracket and a light screen bracket. The light source bracket, the lens bracket and the light screen bracket are sequentially arranged on the support platform along the preset direction. The light source bracket, the lens bracket and the light screen bracket can all be arranged at different positions on the support platform; the light source bracket includes a first telescopic rod and a first connecting component. One end of the first telescopic rod is connected to the support platform, and the other end of the first telescopic rod forms a rotational connection around the axis of the first telescopic rod with the first connecting component. The first connecting component is used to connect with the test light source; the lens bracket includes a second telescopic rod and a second connecting component. One end of the second telescopic rod is connected to the support platform, and the other end of the second telescopic rod forms a rotational connection around the axis of the second telescopic rod with the second connecting component. The second connecting component is used to connect with the test lens; the light screen bracket includes a third telescopic rod and a third connecting component. One end of the third telescopic rod is connected to the support platform, and the other end of the third telescopic rod forms a rotational connection around the axis of the third telescopic rod with the third connecting component. The third connecting component is used to connect with the test light source.

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