CN212567307U - Detection apparatus for square lens asymmetry in flat panel display system - Google Patents

Detection apparatus for square lens asymmetry in flat panel display system Download PDF

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Publication number
CN212567307U
CN212567307U CN202022004585.8U CN202022004585U CN212567307U CN 212567307 U CN212567307 U CN 212567307U CN 202022004585 U CN202022004585 U CN 202022004585U CN 212567307 U CN212567307 U CN 212567307U
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China
Prior art keywords
square lens
autocollimator
display system
sample holder
height
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Active
Application number
CN202022004585.8U
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Chinese (zh)
Inventor
赵丹
王萌萌
王秉章
胡彦龙
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Avic Luoyang Photoelectric Technology Co Ltd
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Avic Luoyang Photoelectric Technology Co Ltd
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Priority to CN202022004585.8U priority Critical patent/CN212567307U/en
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Abstract

The utility model belongs to optical element testing technique relates to a detection apparatus of square lens asymmetry in the flat display system, add holder, collimator, guide rail including digital photoelectricity autocollimator, altitude mixture control platform, sample. During detection, two cut edges of the square lens are respectively used as a reference, the square lens is placed on a sample processing device, a spherical center image is found through a collimator, and the distance from an optical axis to the two cut edges is obtained by measuring the displacement in the height direction between the two spherical center images, namely the asymmetry of a detected piece.

Description

Detection apparatus for square lens asymmetry in flat panel display system
Technical Field
The utility model relates to an optical element testing technique specifically is a detection device of square lens asymmetry in flat display system.
Background
The square lens of the flat display system is formed by cutting two edges of a circular lens, the two edges are parallel, the cut edge is perpendicular to the end face of the lens, and the asymmetry degree of the square lens is the distance from an optical center to the two cut edges.
In general, the asymmetry of a square lens of a flat panel display system is measured by three coordinates, a probe is adopted to collect coordinate data of an excircle and a trimming edge, and the asymmetry from a circle center to two trimming edges is calculated through the coordinate data. However, in the three-coordinate testing process, the probe is easy to scratch the surface of the optical part, and the testing principle is based on the mechanical excircle, so that the actually measured deviation between the excircle center and the cut edge is not the deviation between the cut edge and the optical center, but the deviation between the excircle center and the cut edge, and if the circular lens has a large error, the asymmetry measurement of the square lens is not meaningful.
Disclosure of Invention
For solving the problem that prior art exists, the utility model provides a detection device of square lens asymmetry in flat display system can detect the asymmetry of square lens and improve the detection accuracy.
Technical scheme
The device for detecting the asymmetry degree of the square lens in the flat panel display system is characterized in that: comprises an autocollimator, a height adjusting table, a sample holder, a collimator and a guide rail;
the sample holder is fixed on the height adjusting platform; the height adjusting platform is arranged on the optical platform and is positioned in front of the autocollimator, the sample holder is arranged on the upper part of the height adjusting platform, and the height adjusting platform can be adjusted in the height direction so as to change the height of the sample holder; the height adjusting platform has a coordinate marking function in the height direction;
the sample holder is used for holding a square lens to be detected;
the guide rail is arranged on the optical platform, and the guide rail direction of the guide rail is parallel to the optical axis direction of the autocollimator; the collimator is arranged on the guide rail through a bracket, the autocollimator and the collimator are linearly arranged at the same horizontal height, and the bracket drives the collimator to move along the guide rail.
Furthermore, the autocollimator adopts a digital photoelectric autocollimator, and an external light source can provide a detection light source for the digital photoelectric autocollimator.
Further, the height adjusting table is provided with a height direction scale for realizing a height direction coordinate marking function.
Furthermore, the scale is an electronic grating scale.
Further, the sample holder adopts a structure form that one holding block is fixed, and the other holding block is movable, the fixed holding block is used as a position reference, and the other holding block is movable to provide a holding space and a holding force; the reference clamping surface of the fixed clamping block is perpendicular to the optical axis direction of the autocollimator, and the moving direction of the movable clamping block is along the optical axis direction of the autocollimator.
Further, the bottom surface of the clamping area of the sample holder has a flatness requirement, and the bottom surface has a perpendicularity requirement with the height direction.
Furthermore, the clamping surfaces of the two clamping blocks are stuck with felts.
Advantageous effects
The utility model has the advantages that: the method has the advantages that firstly, non-contact measurement is carried out, the operation is simple, and the asymmetry of the square lens can be conveniently obtained; secondly, the testing accuracy is high, and the repeatability is good; thirdly, the method has wide application range and can be used for measuring similar optical parts; fourth, this sample adds the holder and can be adjusted according to the not unidimensional of the sample that is surveyed, need not to change test fixture, and is simple high-efficient during the use.
Additional aspects and advantages of the invention will be set forth in part in the description which follows and, in part, will be obvious from the description, or may be learned by practice of the invention.
Drawings
The above and/or additional aspects and advantages of the present invention will become apparent and readily appreciated from the following description of the embodiments, taken in conjunction with the accompanying drawings of which:
FIG. 1: the structure diagram of the device for detecting the asymmetry degree of a square lens in a plane display system.
Wherein: the device comprises a digital photoelectric autocollimator 1, a height adjusting table 2, a sample holder 3, a collimator 4, a guide rail 5, a light source 6, a controller 7 and a computer 8.
Detailed Description
The following detailed description of embodiments of the invention is intended to be illustrative, and not to be construed as limiting the invention.
As shown in fig. 1, the device for detecting asymmetry of a square lens in this embodiment includes a digital photoelectric autocollimator 1, a height adjusting stage 2, a sample holder 3, a collimator 4, a guide rail 5, a light source 6, a controller 7, and a computer 8.
The digital photoelectric autocollimator 1 is mounted on an optical platform through a support. The digital photoelectric autocollimator 1 is connected with the light source 6, and the light source 6 can provide a detection light source for the digital photoelectric autocollimator 1.
The sample holder 3 is fixed on the height adjusting stage 2. The height adjusting platform 2 is arranged on the optical platform and is positioned in front of the digital photoelectric autocollimator 1, the sample holder 3 is arranged on the upper part of the height adjusting platform 2, the height adjusting platform 2 can be adjusted in the height direction, so that the height of the sample holder 3 is changed, and the coordinate marking function of the height direction can be realized, for example, a high-precision scale can be adopted for marking, an electronic grating scale can also be adopted for marking, and the relative displacement in the height direction with high precision can be obtained.
The sample holder 3 is used for holding a square lens to be detected. Considering that two side surfaces of the square lens need to be respectively attached and clamped in actual detection, and the distance between the square lens and the digital photoelectric autocollimator 1 needs to be kept unchanged in two clamping processes, the sample holder 3 adopts a structural form that one clamping block is fixed and the other clamping block is movable, the fixed clamping block is used as a position reference, and the other clamping block can move to provide a clamping space and a clamping force, so that the sample holder is suitable for tested pieces with different sizes; the reference clamping surface of the fixed clamping block is vertical to the optical axis direction of the digital photoelectric autocollimator 1, and the moving direction of the movable clamping block is along the optical axis direction of the digital photoelectric autocollimator 1; and has high requirements on the flatness of the bottom surface of the clamping area in the sample holder 3 and the perpendicularity of the bottom surface to the height direction. In order to prevent the surface of the square lens from being damaged during clamping, felt is adhered to the clamping surfaces of the two clamping blocks.
The guide rail 5 is installed on the optical platform, and the guide rail direction of the guide rail 5 is parallel to the optical axis direction of the digital photoelectric autocollimator 1. The collimator 4 is installed on the guide rail 5 through a bracket, the digital photoelectric autocollimator 1 and the collimator 4 are linearly arranged at the same horizontal height, and the bracket drives the collimator 4 to move along the guide rail 5.
The digital photoelectric autocollimator 1 is provided with a light source incidence end and an image output end, the height adjusting platform 2 is provided with a control connection end and a Z-axis data output end, and the guide rail 5 is provided with an XY-axis data output end; the Z-axis data output end of the height adjusting table 2 and the XY-axis data output end of the guide rail 5 are connected with a computer 8 through communication buses; the control connecting end of the height adjusting platform 2 is connected with the controller.
During actual detection, firstly, an edge cutting of the square lens to be detected is attached to the bottom surface of the clamping area in the sample holder 3, and the square lens is placed and firmly clamped; selecting a matched objective lens according to the focal length of the square lens to be detected, installing the objective lens on the collimator 4, adjusting the height adjusting platform 2, moving the bracket of the collimator 4 left and right, finding the spherical center image of the square lens to be detected, recording the corresponding position of the spherical center image in a view field at the moment, and setting the displacement height of the height adjusting platform 2 at the moment as a zero point. Then, turning the square lens to be detected for 180 degrees, and placing and firmly clamping the other cut edge of the square lens to be detected to be attached to the bottom surface of the clamping area in the sample holder 3; and adjusting the height adjusting platform 2 up and down to enable the position of the spherical center image to coincide with the position of the first spherical center image in the view field, and obtaining the height direction displacement S of the height adjusting platform 2 relative to the zero point, namely the asymmetry degree of the square lens.
Although embodiments of the present invention have been shown and described, it is to be understood that the above embodiments are exemplary and should not be construed as limiting the present invention, and that changes, modifications, substitutions and alterations can be made to the above embodiments by those of ordinary skill in the art without departing from the principles and spirit of the present invention.

Claims (7)

1. A detection device for detecting the asymmetry of a square lens in a flat panel display system is characterized in that: comprises an autocollimator, a height adjusting table, a sample holder, a collimator and a guide rail;
the sample holder is fixed on the height adjusting platform; the height adjusting platform is arranged on the optical platform and is positioned in front of the autocollimator, the sample holder is arranged on the upper part of the height adjusting platform, and the height adjusting platform can be adjusted in the height direction so as to change the height of the sample holder; the height adjusting platform has a coordinate marking function in the height direction;
the sample holder is used for holding a square lens to be detected;
the guide rail is arranged on the optical platform, and the guide rail direction of the guide rail is parallel to the optical axis direction of the autocollimator; the collimator is arranged on the guide rail through a bracket, the autocollimator and the collimator are linearly arranged at the same horizontal height, and the bracket drives the collimator to move along the guide rail.
2. The apparatus for detecting asymmetry of square lens in flat display system according to claim 1, wherein: the autocollimator adopts a digital photoelectric autocollimator, and an external light source can provide a detection light source for the digital photoelectric autocollimator.
3. The apparatus for detecting asymmetry of square lens in flat display system according to claim 1, wherein: the height adjusting platform is provided with a height direction scale and is used for realizing a height direction coordinate marking function.
4. The apparatus for detecting asymmetry of square lens in flat display system according to claim 3, wherein: the scale is an electronic grating scale.
5. The apparatus for detecting asymmetry of square lens in flat display system according to claim 1, wherein: the sample holder adopts a structure form that one holding block is fixed, the other holding block is movable, the fixed holding block is used as a position reference, and the other holding block is movable to provide a holding space and a holding force; the reference clamping surface of the fixed clamping block is perpendicular to the optical axis direction of the autocollimator, and the moving direction of the movable clamping block is along the optical axis direction of the autocollimator.
6. The apparatus for detecting asymmetry of square lens in flat display system according to claim 5, wherein: the bottom surface of the clamping area of the sample holder has flatness requirements and the bottom surface has perpendicularity requirements with the height direction.
7. The apparatus for detecting asymmetry of square lens in flat display system according to claim 5, wherein: the felt is stuck on the clamping surfaces of the two clamping blocks.
CN202022004585.8U 2020-09-14 2020-09-14 Detection apparatus for square lens asymmetry in flat panel display system Active CN212567307U (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
CN202022004585.8U CN212567307U (en) 2020-09-14 2020-09-14 Detection apparatus for square lens asymmetry in flat panel display system

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
CN202022004585.8U CN212567307U (en) 2020-09-14 2020-09-14 Detection apparatus for square lens asymmetry in flat panel display system

Publications (1)

Publication Number Publication Date
CN212567307U true CN212567307U (en) 2021-02-19

Family

ID=74621876

Family Applications (1)

Application Number Title Priority Date Filing Date
CN202022004585.8U Active CN212567307U (en) 2020-09-14 2020-09-14 Detection apparatus for square lens asymmetry in flat panel display system

Country Status (1)

Country Link
CN (1) CN212567307U (en)

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