Testing device for head-mounted camera module

Abstract

The utility model relates to a testing device for a head-mounted camera module. The testing device for the head-mounted camera module comprises a rotating platform, a white field testing module, an SFR testing module, a relay lens module and a dark field testing module. The rotating platform is provided with four stations, at least one station is provided with a camera module, the initial positions of the four stations are a feeding position, a white field testing position, an SFR testing position and a dark field testing position in sequence, and the rotating platform is controlled to rotate so that all the stations can rotate to the corresponding designated positions. And the white field test module corresponds to the white field test position in position and is used for carrying out white field test on the camera module. And the SFR test module corresponds to the SFR test position in position, is provided with a test graphic card of which the height can be adjusted along the vertical direction, and is used for carrying out SFR test on the camera module. And the relay lens module is matched with the SFR test module to adjust the test distance. And the dark field test module corresponds to the dark field test position in position and is used for performing dark field test on the camera module.

Description

Technical Field

[0001] The utility model relates to the technical field of camera detection, and in particular to a testing device for a head-mounted camera module. Background Art

[0002] In the current development of camera function testing needs and head-mounted camera testing, white field testing, dark field testing, and SFR testing are all essential. However, the existing head-mounted camera module test equipment has a single function. If multiple tests are performed on the camera module, it is necessary to use multiple single-function test settings to test the camera module in turn, which not only takes a long time to test, but also leads to a high overall test cost for the camera module. At the same time, the test working distance of the existing camera module SFR test equipment is fixed, and it can only test a single fixed camera module, and the equipment compatibility and reusability are poor. Utility Model Content

[0003] The purpose of the utility model is to provide a testing device for a head-mounted camera module, which can integrate three functional tests, namely white field test, SFR test and dark field test, through a four-station rotating platform, so as to shorten the test time and improve the test efficiency; at the same time, the SFR test module is matched with a relay lens module to simulate any test distance, meet the basic test requirements of different camera modules, and increase the compatibility of the device and the reusability of subsequent modification.

[0004] In order to achieve the above object, the utility model provides a testing device for a head-mounted camera module, comprising:

[0005] A rotating platform is provided with four workstations, at least one of which is provided with a camera module, the initial positions of the four workstations are a loading position, a white field test position, an SFR test position and a dark field test position, respectively, and the rotating platform is controlled to rotate so that each workstation rotates to a corresponding designated position;

[0006] A white field test module, corresponding to the white field test position, for performing a white field test on the camera module;

[0007] An SFR test module, corresponding to the SFR test position, is provided with a test chart with adjustable height in the vertical direction, and is used to perform an SFR test on the camera module;

[0008] A relay mirror module, cooperating with the SFR test module to adjust the test distance;

[0009] A dark field test module corresponds to the dark field test position and is used to perform a dark field test on the camera module.

[0010] Optionally, a support module is provided on the workstation for horizontally adjusting the position of the camera module.

[0011] Optionally, the SFR test module further includes:

[0012] The chart card fixing plate is arranged just above the SFR test position, and the chart card fixing plate is provided with a light source board, the test chart card and the relay mirror module in sequence from top to bottom.

[0013] Optionally, the SFR test module further includes:

[0014] The lifting module is used to adjust the height of the test chart.

[0015] Optionally, the lifting module includes:

[0016] Lifting floor;

[0017] Four lifting guide shafts are respectively arranged at the four corners of the lifting bottom plate;

[0018] A lifting connection plate, arranged above the picture card fixing plate and connected to the picture card fixing plate, the lifting connection plate is sleeved on the four lifting guide shafts and can move up and down in the vertical direction;

[0019] The lift is arranged on the lifting bottom plate, and a lifting connecting rod is arranged between the lift and the lifting bottom plate.

[0020] Optionally, the lift is driven by a screw or a cylinder.

[0021] Optionally, a light shield is provided on the workstation, and the light shield is used to shield the camera module from light.

[0022] Optionally, the dark field module is provided with a dark box which can move up and down in a vertical direction, and the dark box is used to completely cover the camera module.

[0023] The beneficial effects of the utility model are as follows: the three functional tests of white field test, SFR test and dark field test are integrated into one through the four-station rotating platform, thereby shortening the test time and improving the test efficiency; at the same time, the SFR test module is matched with the relay mirror module to simulate any test distance, meet the basic test requirements of different camera modules, increase the compatibility of the device and the reusability for subsequent modification.

[0024] The above description is only an overview of the technical solution of the utility model. In order to more clearly understand the technical means of the utility model and implement it according to the contents of the specification, the following is a detailed description of the preferred embodiments of the utility model in conjunction with the accompanying drawings. BRIEF DESCRIPTION OF THE DRAWINGS

[0025] Figure 1 This is a first schematic structural diagram of a testing device for a head-mounted camera module shown in one embodiment of the utility model;

[0026] Figure 2 A second schematic structural diagram of a testing device for a head-mounted camera module shown in an embodiment of the utility model;

[0027] In the figure: 1. rotating platform; 11. work station; 111. loading station; 112. white field test station; 113. SFR test station; 114. dark field test station; 12. camera module; 13. support module; 14. light shield; 2. white field test module; 3. SFR test module; 31. test chart; 32. chart fixing plate; 33. lifting module; 331. lifting bottom plate; 332. lifting guide shaft; 333. lifting connecting plate; 334. lifting machine; 335. lifting connecting rod; 34. light source board; 4. relay mirror module; 5. dark field test module. DETAILED DESCRIPTION

[0028] The technical solution of the utility model will be described clearly and completely below in conjunction with the accompanying drawings. Obviously, the described embodiments are part of the embodiments of the utility model, not all of the embodiments. Based on the embodiments of the utility model, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the utility model.

[0029] In the description of the present invention, it should be noted that the terms "center", "upper", "lower", "left", "right", "vertical", "horizontal", "inner", "outer", etc., indicating the orientation or positional relationship, are based on the orientation or positional relationship shown in the drawings, and are only for the convenience of describing the present invention and simplifying the description, rather than indicating or implying that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore cannot be understood as limiting the present invention. In addition, the terms "first", "second", and "third" are used for descriptive purposes only, and cannot be understood as indicating or implying relative importance.

[0030] In the description of the present utility model, it should be noted that, unless otherwise clearly specified and limited, the terms "installed", "connected" and "connected" should be understood in a broad sense. For example, it can be a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection or an electrical connection; it can be a direct connection, or it can be indirectly connected through an intermediate medium, or it can be the internal connection of two components. For ordinary technicians in this field, the specific meanings of the above terms in the present utility model can be understood according to specific circumstances. In addition, the technical features involved in the different embodiments of the present utility model described below can be combined with each other as long as they do not conflict with each other.

[0031] See also Figure 1 and Figure 2 A testing device for a head-mounted camera module shown in a preferred embodiment of the present application includes a rotating platform 1, a white field test module 2, an SFR test module 3, a relay mirror module 4 and a dark field test module 5. The rotating platform 1 is provided with four stations 11, at least one of which is provided with a camera module 12, and the initial positions of the four stations 11 are respectively a loading position 111, a white field test position 112, an SFR test position 113 and a dark field test position 114, and the rotating platform 1 is controlled to rotate so that each station 11 rotates to a corresponding designated position. The white field test module 2 corresponds to the white field test position 112, and is used to perform a white field test on the camera module 12. The SFR test module 3 corresponds to the SFR test position 113, and is provided with a test chart 31 whose height can be adjusted in the vertical direction, and is used to perform an SFR test on the camera module 12. The relay mirror module 4 cooperates with the SFR test module 3 to adjust the test distance. The dark field test module 5 corresponds to the dark field test position 114 and is used to perform a dark field test on the camera module 12 .

[0032] According to the solution of the embodiment of the utility model, the three functional tests of white field test, SFR test and dark field test are integrated into one through the four-station 11 rotating platform 1, which shortens the test time. Compared with the single camera function test, the test efficiency is significantly improved; at the same time, the SFR test module 3 is matched with the relay lens module 4, which can simulate any test distance and meet the basic test requirements of different camera modules 12, thereby increasing the compatibility of the device and the reusability for subsequent modification.

[0033] The following is a detailed description with specific embodiments:

[0034] See also Figure 1 and Figure 2 The station 11 is provided with a support module 13 for horizontally adjusting the position of the camera module 12. The rotation accuracy of the rotating platform 1 can reach 30 seconds, and the horizontal adjustment of the support module 13 can improve the repeated positioning accuracy of the camera module 12 after the adjustment is completed.

[0035] The SFR test module 3 also includes a chart card fixing plate 32 and a lifting module 33 for adjusting the height of the test chart card 31. The chart card fixing plate 32 is arranged directly above the SFR test position 113. The chart card fixing plate 32 is provided with a light source board 34, a test chart card 31 and a relay mirror module 4 in sequence from top to bottom. The lifting module 33 includes a lifting base plate 331, four lifting guide shafts 332 respectively arranged at the four corners of the lifting base plate 331, a lifting connection plate 333 and a lifter 334. The lifting connection plate 333 is arranged above the chart card fixing plate 32 and connected to the chart card fixing plate 32. The lifting connection plate 333 is sleeved on the four lifting guide shafts 332 and can move up and down in the vertical direction. The lifter 334 is arranged on the lifting base plate 331, and a lifting connecting rod 335 is arranged between the lifter 334 and the lifting base plate 331. Specifically, the lifter 334 is driven by a lead screw or a cylinder 52.

[0036] The station 11 is provided with a light shield 14, which is used to shield the camera module 12 from light, so as to prevent the light source of other parts of the device from interfering with the test of the camera module 12 of the station 11. The device also includes a cabinet, and each door panel of the upper cabinet is equipped with a door opening sensor to prevent personnel from opening the equipment door by mistake. Two sensors are installed at the station loading port to detect the opening and closing status of the pressure plate and the needle mold to prevent equipment damage caused by personnel mistaken operation. Matt paint or anode is used inside the device to prevent light reflection. The dark field module is provided with a dark box that can be moved up and down in the vertical direction. The dark box is used to completely cover the camera module 12. In this embodiment, the dark box is adjusted up and down in the vertical direction by a cylinder.

[0037] The device is also equipped with a UI interface and a test software algorithm for analyzing the test image.

[0038] When in use, first put the camera module 12 into the work station 11 and realize the power-on communication with the camera module 12. After completion, the camera module 12 is transferred to the white field test position 112 by the rotating platform 1. The white field test module 2 is provided with a white board. At this time, the white board is lit. The camera module 12 takes a photo of the white board directly below the uniform and stable white board. The image is analyzed by the software to obtain the image analysis result, and the data and image are saved; the camera module 12 enters the SFR test position 113, and at the corresponding test distance, the test chart 31 is photographed and analyzed. The algorithm captures the image of the corresponding field of view of the set area, takes the image for analysis, and saves the data and image; the camera module 12 is transferred to the dark field test position 114. At this time, the dark box is under the control of the cylinder and completely covers the camera module 12. The camera module 12 product takes a photo, and the software obtains the image analysis, and saves the data and image; finally, the camera module 12 is transferred back to the loading position 111, and the camera module 12 is removed to complete the test. The four workstations 11 of the rotating platform 1 can be loaded and tested at the same time, and can also idle or shield any test position. The debugging control interface is simple and easy to operate.

[0039] The technical features of the above-described embodiments may be arbitrarily combined. To make the description concise, not all possible combinations of the technical features in the above-described embodiments are described. However, as long as there is no contradiction in the combination of these technical features, they should be considered to be within the scope of this specification.

[0040] The above-mentioned embodiments only express several implementation methods of the utility model, and the description is relatively specific and detailed, but it cannot be understood as limiting the scope of the utility model patent. It should be pointed out that for ordinary technicians in this field, several modifications and improvements can be made without departing from the concept of the utility model, which all belong to the protection scope of the utility model. Therefore, the protection scope of the utility model patent shall be based on the attached claims.

Claims

1. A testing device for a head-mounted camera module, characterized in that: include: A rotating platform is provided with four workstations, at least one of which is provided with a camera module, the initial positions of the four workstations are a loading position, a white field test position, an SFR test position and a dark field test position, respectively, and the rotating platform is controlled to rotate so that each workstation rotates to a corresponding designated position; A white field test module, corresponding to the white field test position, for performing a white field test on the camera module; An SFR test module, corresponding to the SFR test position, is provided with a test chart with adjustable height in the vertical direction, and is used to perform an SFR test on the camera module; A relay mirror module, cooperating with the SFR test module to adjust the test distance; A dark field test module corresponds to the dark field test position and is used to perform a dark field test on the camera module.

2. The testing device for a head-mounted camera module according to claim 1, characterized in that: A supporting module is provided on the workstation for horizontally adjusting the position of the camera module.

3. The testing device for a head-mounted camera module according to claim 1, characterized in that: The SFR test module also includes: The chart card fixing plate is arranged just above the SFR test position, and the chart card fixing plate is provided with a light source board, the test chart card and the relay mirror module in sequence from top to bottom.

4. The testing device for a head-mounted camera module according to claim 3, characterized in that: The SFR test module also includes: The lifting module is used to adjust the height of the test chart.

5. The testing device for a head-mounted camera module according to claim 4, characterized in that: The lifting module comprises: Lifting floor; Four lifting guide shafts are respectively arranged at the four corners of the lifting bottom plate; A lifting connection plate, arranged above the picture card fixing plate and connected to the picture card fixing plate, the lifting connection plate is sleeved on the four lifting guide shafts and can move up and down in the vertical direction; The lift is arranged on the lifting bottom plate, and a lifting connecting rod is arranged between the lift and the lifting bottom plate.

6. The testing device for a head-mounted camera module according to claim 5, characterized in that: The lift is driven by a screw or a cylinder.

7. The testing device for a head-mounted camera module according to claim 1, characterized in that: A light shield is provided on the work station, and the light shield is used to shield the camera module from light.

8. The testing device for a head-mounted camera module according to claim 1, characterized in that: The dark field test module is provided with a dark box which can move up and down in a vertical direction, and the dark box is used to completely cover the camera module.

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