CN212134036U - Stray light testing device for projection lens - Google Patents
Stray light testing device for projection lens Download PDFInfo
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- CN212134036U CN212134036U CN202020944289.3U CN202020944289U CN212134036U CN 212134036 U CN212134036 U CN 212134036U CN 202020944289 U CN202020944289 U CN 202020944289U CN 212134036 U CN212134036 U CN 212134036U
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Abstract
The utility model provides a stray light testing device of a projection lens, which comprises a testing system, a receiving screen and a display screen connected with the testing system; the lens to be tested is arranged between the display screen and the receiving screen, and light rays emitted by the display screen are projected on the receiving screen after passing through the lens to be tested; the test system is used for controlling the test area of the display screen to emit light and forming an imaging area and a flare area and/or a ghost area corresponding to the test area on the receiving screen; an illuminometer is arranged on the receiving screen and is used for acquiring irradiance of an imaging area and/or a flare area and/or a ghost area so as to determine stray light information of the test lens in the test area. Utilize above-mentioned utility model can be simple quick carry out the stray light test to contrary class lens of imaging.
Description
Technical Field
The utility model relates to an optics product test technical field, more specifically relates to a stray light testing arrangement of projection lens.
Background
At present, the phenomenon of stray light generally exists in optical products such as mobile phone lenses, security cameras and the like, the stray light is mainly caused by the radiation ratio that unwanted redundant radiation on the image plane of an optical or electro-optical system enters the system through a normal incident aperture, and the stray light not only affects the imaging quality of the lenses, but also affects user experience under severe conditions.
Therefore, when an optical lens is produced or shipped from a factory, stray light detection is firstly carried out to obtain a stray light coefficient of the lens, wherein the stray light coefficient is an important index for evaluating the stray light inhibition performance of the optical lens, most of the existing stray light coefficient testing methods are directed at forward imaging lenses such as photographic lenses, and the stray light coefficients of inverse imaging projection lenses such as AR and VR are tested by a few methods, or naked eye detection is directly adopted, or a testing device is excessively complicated and the testing process is complicated.
Therefore, a testing apparatus and a method for detecting the stray light coefficient of the inverse imaging lens are needed.
SUMMERY OF THE UTILITY MODEL
In view of the above problem, the utility model aims at providing a stray light testing arrangement of projection lens to solve the low or loaded down with trivial details, the complicated scheduling problem of process of testing arrangement of the measuring accuracy that adopts naked eye or special device to carry out stray light test existence at present.
The utility model provides a stray light testing device of a projection lens, which comprises a testing system, a receiving screen and a display screen connected with the testing system; the lens to be tested is arranged between the display screen and the receiving screen, and light rays emitted by the display screen are projected on the receiving screen after passing through the lens to be tested; the test system is used for controlling the test area of the display screen to emit light and forming an imaging area and/or a flare area and/or a ghost area corresponding to the test area on the receiving screen; an illuminometer is arranged on the receiving screen and is used for acquiring irradiance of an imaging area and/or a flare area and/or a ghost area so as to determine stray light information of the test lens in the test area.
In addition, the preferable structure is that grid lines and scale scales which are uniformly distributed are arranged on the receiving screen; the grid lines and the scale are used for determining the position information of the imaging area and/or the flare area and/or the ghost area.
Further, it is preferable that the receiving screen includes a metal plate and a white plate provided on one side of the metal plate; the grid lines and the scale are arranged on the white board.
Preferably, the illuminometer has a magnet attracting structure, and the metal plate is used to attract and fix the illuminometer to the whiteboard.
In addition, it is preferable that the lens to be tested is an inverse imaging projection lens.
In addition, it is preferable that the test area has a regular polygonal or circular shape.
In addition, the preferable structure is that the test areas are uniformly distributed on the display screen; alternatively, the test areas are distributed at four corner positions and a center position of the display screen.
In addition, it is preferable that the side length or the diameter of the test area is 8% to 12% of the side length of the display screen.
In addition, the preferable structure is that an expansion area is expanded outside the imaging area; the area of the expansion region is 10% -50% of the area of the imaging region.
In addition, the preferable structure is that the display screen is a self-contained screen of the lens to be tested.
According to the above technical scheme, the utility model discloses a stray light testing arrangement of projection lens, through the luminous condition of the test area on the test system control display screen, and then form the imaging area and the stray light region (flare area or ghost area) that correspond with the test area on receiving the screen, acquire the irradiance value of imaging area and stray light region through the illuminometer, and then confirm the stray light relative strength of examination survey camera lens at the test area, can realize the quick stray light test to the reverse imaging camera lens, the device simple structure, the measuring accuracy is high, wide application scope.
Drawings
Other objects and results of the invention will be more apparent and readily appreciated by reference to the following description taken in conjunction with the accompanying drawings, and as the invention is more fully understood. In the drawings:
fig. 1 is a schematic structure of a stray light testing device for a projection lens according to an embodiment of the present invention;
fig. 2 is a side view of a receiving screen according to an embodiment of the present invention;
fig. 3 is a schematic diagram of a test area and an imaging area according to an embodiment of the present invention.
Wherein the reference numerals include: the test system comprises a test system 1, a display screen 2, a lens 3 to be tested, a light ray 4, a receiving screen 5, an illuminometer 6, a test area 7, an imaging area 8, an expansion area 9, a white board 10 and a metal plate 11.
The same reference numbers in all figures indicate similar or corresponding features or functions.
Detailed Description
For the detailed description, the stray light testing device of the projection lens of the present invention will be described in detail with reference to the accompanying drawings.
Fig. 1 shows the structure of the stray light testing device of the projection lens according to the embodiment of the present invention.
As shown in fig. 1, the stray light testing apparatus for a projection lens according to an embodiment of the present invention includes a testing system 1, a receiving screen 5, and a display screen 2 connected to the testing system 1; the lens 3 to be tested is arranged between the display screen 2 and the receiving screen 5, and light 4 emitted by the display screen 2 passes through the lens 3 to be tested and then is projected on the receiving screen 5; the test system 1 is used for controlling a specified test area 7 of the display screen 2 to emit light and forming an imaging area 8 and/or a flare area and/or a ghost area corresponding to the test area 7 on the receiving screen 5; in addition, an illuminometer 6 is arranged on the receiving screen 5, and the illuminometer 6 is used for acquiring irradiance of an imaging area 8 and/or a flare area and/or a ghost area so as to determine stray light information of the test lens in a test area 7.
The test system 1 can adopt a computer or a test chip or system arranged on the computer, and the test system 1 can be in signal conduction with the display screen 2 and the receiving screen 5, and can control the light-emitting area of the display screen 2 through the test system 1 and acquire the feedback information on the receiving screen 5.
Specifically, evenly distributed grid lines and scales may be provided on the receiving screen 5, by which the tester is helped to quickly lock the position information of the imaging area 8 and the flare area and/or the ghost area.
Fig. 2 shows a side view structure of a receiving screen according to an embodiment of the present invention.
As shown in fig. 2, the utility model discloses a receiving screen 5 can set up to including metal sheet 11 and the blank 10 of setting in metal sheet one side, and gridlines and scale are evenly set up on blank 10, can assist the tester to judge the positional information of formation of image area 8 and/or flare area and/or ghost area fast through gridlines and scale to carry out the analysis to the formation reason of flare area and/or ghost area.
In another embodiment of the present invention, the illuminometer 6 is configured as a magnet-attracting structure, and the illuminometer 6 and the metal plate 11 attract each other, so that the illuminometer 6 is attracted and fixed to an arbitrary position of the white board 10. During the test, the illuminometer 6 is moved to the imaging area 8, flare area and ghost area of the receiving screen 5, and stray light irradiance values in this area are acquired.
Specifically, the test area 7 arranged on the display screen 2 may be a regular polygonal area such as a square, a rectangle, or a circular area, the test area 7 may be uniformly distributed on the display screen 2, or may be only distributed at four corners and a center of the display screen 2, and during the stray light test, the test area 7 may be adjusted by the test system 1, so as to realize the stray light test of any position of the lens 3 to be tested.
Further, the side length or diameter of the single test area 7 is set to 8% to 12% of the side length of the display screen 2 to ensure the acquisition accuracy of the irradiance of the imaging area 8.
Fig. 3 shows a schematic structure of a test area and an imaging area according to an embodiment of the present invention.
As shown in fig. 3, the test area 7 of the embodiment of the present invention is an area a (test area a) on the display screen 2, and an imaging area a 'corresponding to the test area a is formed on the receiving screen 5, and the test area a and the imaging area a' are in an object-image correspondence relationship.
In addition, an expansion area B is expanded outside the imaging area 8, the expansion area B is an edge area of the imaging area a', in the stray light detection process, whether a flare area or a ghost area exists outside the expansion area B of the receiving screen 5 can be observed through naked eyes, and then the illuminometer 6 is moved to a corresponding area, so that the irradiance collection can be realized.
In one embodiment of the present invention, the area of the extension region 9 may be set to 10% to 50% of the area of the imaging region 8.
The testing regions 7 can be set in a uniformly distributed mode, and the testing regions are controlled to emit light or not to emit light one by one through a certain indication direction so as to obtain stray light data of the lens 3 to be tested in the corresponding testing region until all the testing regions are detected; in addition, the test areas can also only select the positions of the four corners and the center of the display screen, the test sequence of each test area can be set by oneself, and the specific number, position and shape of the test areas can be set according to the detection precision of the lens 3 to be tested and the user requirements, and is not limited to the specific examples shown in the drawings.
Utilize the utility model provides a when stray light testing arrangement of projection lens carries out stray light test, at first, set up the test area region 7 of display screen 2 through test system 1 and give out light, other positions outside test area region 7 are not luminous. Then, the tester visually observes whether stray light such as flare areas or ghost areas exists outside the imaging area (or the extension area 9) on the receiving screen 5, and determines the distribution position thereof with the aid of grid lines and a scale. Furthermore, the illuminometer 6 is placed in the imaging area 8, the first irradiance value of the imaging area 8 is read, then the illuminometer 6 is placed in the flare area (in the presence) or the ghost area (in the presence), the second irradiance value of the corresponding area is read, the ratio of the second irradiance value to the first irradiance value is the stray light coefficient of the testing area 7, and then the relative intensity of the stray light such as flare and ghost can be quantified and represented, so that the stray light position and the relative intensity information of the testing lens can be obtained.
It should be noted that the utility model discloses a await measuring camera lens or await measuring projection lens can be for inverse imaging lens, for example, AR camera lens or VR camera lens.
Additionally, the utility model provides a display screen 2 can also can adopt the screen of taking certainly of the examination camera lens 3 that awaits measuring for the screen that sets up in examination camera lens 3 one side that awaits measuring, and it is connected with test system, can present different test regions all can.
Can find out through above-mentioned embodiment, the utility model provides a stray light testing arrangement of projection lens, through the luminous condition of the test area on the test system control display screen, and then form the imaging region and the stray light region that correspond with the test area on receiving the screen, acquire the irradiance value of imaging region and stray light region through the illuminometer, and then confirm the stray light intensity of the camera lens that awaits measuring at the test area, can realize the quick stray light test to contrary imaging lens, device simple structure, test accuracy height.
The stray light testing apparatus for a projection lens according to the present invention is described above by way of example with reference to the accompanying drawings. However, it should be understood by those skilled in the art that various modifications can be made to the stray light testing device of the projection lens provided by the present invention without departing from the scope of the present invention. Therefore, the scope of the present invention should be determined by the content of the appended claims.
Claims (10)
1. A stray light testing device of a projection lens is characterized by comprising a testing system, a receiving screen and a display screen connected with the testing system; wherein the content of the first and second substances,
the lens to be tested is arranged between the display screen and the receiving screen, and light rays emitted by the display screen are projected on the receiving screen after passing through the lens to be tested;
the test system is used for controlling a test area of the display screen to emit light and forming an imaging area and/or a flare area and/or a ghost area corresponding to the test area on the receiving screen;
and an illuminometer is arranged on the receiving screen and is used for acquiring irradiance of the imaging area and/or the flare area and/or the ghost area so as to determine stray light information of the test lens in the test area.
2. The stray light testing device for projection lens of claim 1,
grid lines and scale rulers which are uniformly distributed are arranged on the receiving screen;
the grid lines and the scale are used for judging the position information of the imaging area and/or the flare area and/or the ghost area.
3. The stray light testing device for projection lens of claim 2,
the receiving screen comprises a metal plate and a white plate arranged on one side of the metal plate;
the grid lines and the scale are arranged on the white board.
4. The stray light testing device for projection lens of claim 3,
the illuminance meter is of a magnet adsorption structure, and the metal plate is used for adsorbing and fixing the illuminance meter on the white board.
5. The stray light testing device for projection lens of claim 1,
the lens to be tested is an inverse imaging projection lens.
6. The stray light testing device for projection lens of claim 1,
the test area is a regular polygon or a circle.
7. The stray light testing device for projection lens of claim 1,
the test areas are uniformly distributed on the display screen; alternatively, the first and second electrodes may be,
the test areas are distributed at four corner positions and a central position of the display screen.
8. The stray light testing device for projection lens of claim 1,
the side length or the diameter of the test area is 8% -12% of the side length of the display screen.
9. The stray light testing device for projection lens of claim 1,
an expansion area is expanded outside the imaging area;
the area of the expansion region is 10% -50% of the area of the imaging region.
10. The stray light testing device for projection lens of claim 1,
the display screen is a self-contained screen of the lens to be tested.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202020944289.3U CN212134036U (en) | 2020-05-28 | 2020-05-28 | Stray light testing device for projection lens |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202020944289.3U CN212134036U (en) | 2020-05-28 | 2020-05-28 | Stray light testing device for projection lens |
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| CN212134036U true CN212134036U (en) | 2020-12-11 |
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| CN202020944289.3U Active CN212134036U (en) | 2020-05-28 | 2020-05-28 | Stray light testing device for projection lens |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN113852803A (en) * | 2021-08-30 | 2021-12-28 | 歌尔光学科技有限公司 | Ghost image test method, ghost image test system and computer readable storage medium |
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2020
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Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN113852803A (en) * | 2021-08-30 | 2021-12-28 | 歌尔光学科技有限公司 | Ghost image test method, ghost image test system and computer readable storage medium |
| CN113852803B (en) * | 2021-08-30 | 2024-03-12 | 歌尔光学科技有限公司 | Ghost image testing method, ghost image testing system and computer readable storage medium |
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