Relay lens center correction tool

Abstract

The utility model discloses a relay lens center correction tool, which belongs to the technical field of optical product correction, debugging supports of a plurality of test stations utilize the same relay lens center correction tool as a debugging target, and the relay lens center correction tool is directly connected with a relay lens module. And the deviation directions of the plurality of relay lens modules in the tolerance range are kept consistent, so that the consistency of optical inclination of the plurality of test stations can be improved.

Description

Technical Field

[0001] This utility model relates to the field of optical product calibration technology, and in particular to a relay lens center calibration fixture. Background Technology

[0002] When a camera module needs quality testing, a camera testing device is required to simulate telephoto imaging at a relatively close distance. This testing device typically uses a relay lens module in conjunction with the camera module. The camera testing device has multiple testing stations, each equipped with an image test card and a relay lens module. During testing, the camera module moves below the relay lens module, ensuring that the optical centers of the image test card, relay lens module, and camera module are aligned in a straight line. The camera module is tested sequentially through multiple testing stations to ensure accurate test results.

[0003] Currently, each testing station is equipped with a calibration bracket. When the camera testing device has been idle for an extended period or the relay lens module has been replaced, the calibration bracket is needed to calibrate the central axis of the relay lens module. Calibration requires disassembling the relay lens module, installing the calibration fixture onto the calibration bracket, and then reinstalling the relay lens module. However, because the calibration fixture is connected to the calibration bracket, there is a deviation between the central axis of the calibration fixture and the relay lens module. Therefore, the calibrated central axes of multiple relay lens modules deviate in different directions, easily leading to poor consistency in optical tilt across multiple testing stations. Utility Model Content

[0004] This invention aims to solve at least one of the technical problems existing in the prior art. To this end, this invention proposes a relay lens center correction fixture. The debugging brackets of multiple test stations use the same relay lens center correction fixture as the debugging target, and the relay lens center correction fixture is directly connected to the relay lens module, so that the deviation direction of multiple relay lens modules within the tolerance range is consistent, which helps to improve the consistency of optical tilt of multiple test stations.

[0005] A relay lens center correction fixture according to an embodiment of the present invention is used in a camera testing device. The camera testing device includes a relay lens module and an adjustment bracket. The adjustment bracket adjusts the central axis position of the relay lens module. The relay lens center correction fixture includes:

[0006] The main body has a mounting part at the top for detachably connecting the relay lens module, and a light-transmitting tube at the bottom of the main body with a light-transmitting hole that passes through the mounting part.

[0007] When the mounting part is connected to the relay lens module, the central axis of the relay lens module coincides with the axis of the light-transmitting hole.

[0008] The relay lens center calibration fixture according to the embodiments of this utility model has at least the following beneficial effects: When calibrating the center axis of the relay lens module at a certain test station, the mounting part of the main body is connected to the relay lens module, so that the center axis of the light-transmitting hole coincides with the center axis of the relay lens module. The axis of the light-transmitting hole of the light-transmitting tube is used as the calibration target of the calibration bracket. Since the axis of the light-transmitting hole coincides with the center axis of the relay lens module, it can be ensured that the calibration bracket adjusts the position of the center axis of the relay lens module; the standard camera below adjusts its position according to the axis of the light-transmitting hole so that the image test card and the relay lens module... The optical centers of the relay lens module and the standard camera module are on the same straight line, thus completing the central axis correction of the relay lens module. Then, the main body is disassembled and installed on the relay lens module of another test station. The above steps are repeated until the relay lens modules of all test stations are corrected. Therefore, the debugging brackets of multiple test stations use the same relay lens center correction fixture as the debugging target, and the relay lens center correction fixture is directly connected to the relay lens module, so that the deviation direction of multiple relay lens modules within the tolerance range is consistent, which helps to improve the consistency of optical tilt of multiple test stations.

[0009] According to some embodiments of the present invention, the top of the mounting part is provided with a mounting cavity, the mounting cavity is provided with a reference platform, the top surface of the reference platform is perpendicular to the axis of the light-transmitting hole, and the top surface of the reference platform is used to abut against the bottom surface of the relay lens module.

[0010] According to some embodiments of the present invention, the side wall of the mounting cavity is provided with a limiting surface, the limiting surface is used to abut against the side of the relay lens module, and a clearance groove is provided between the limiting surface and the reference platform.

[0011] According to some embodiments of the present invention, the edge of the reference platform is chamfered and / or the top edge of the limiting surface is chamfered.

[0012] According to some embodiments of the present invention, the bottom of the relay lens module is provided with a downward protrusion. When the top surface of the reference platform abuts against the bottom surface of the relay lens module, there is a space between the protrusion and the reference platform, and there is a space between the bottom of the protrusion and the bottom wall of the mounting cavity.

[0013] According to some embodiments of this utility model, the relay lens center correction fixture further includes:

[0014] Fasteners for detachably connecting the mounting portion to the relay lens module.

[0015] According to some embodiments of the present invention, there are multiple fasteners, and the multiple fasteners are distributed at intervals along the circumference of the light-transmitting cylinder.

[0016] According to some embodiments of this utility model, the fastener is a screw.

[0017] According to some embodiments of this utility model, the outer wall of the light-transmitting tube is provided with an orientation mark.

[0018] According to some embodiments of the present invention, a positioning ring is provided on the bottom end face of the light-transmitting tube, and the center of the positioning ring coincides with the axis of the light-transmitting hole. Attached Figure Description

[0019] Figure 1 This is a schematic diagram of the structure of a relay lens center correction fixture according to an embodiment of the present invention;

[0020] Figure 2 This is a schematic diagram of the relay lens center correction fixture from another angle according to an embodiment of the present invention;

[0021] Figure 3 This is a cross-sectional schematic diagram of a relay lens center correction fixture according to an embodiment of the present invention;

[0022] Figure 4 This is a cross-sectional schematic diagram of a relay lens module connected to a mid-level lens center correction fixture according to an embodiment of this utility model.

[0023] Reference numerals: Body 100, Mounting part 110, Mounting cavity 111, Reference platform 112, Limiting surface 113, Alternating groove 114, Light-transmitting tube 120, Light-transmitting hole 121, Orientation mark 122, Positioning ring 123, Relay lens module 200, Protrusion 210, Fastener 300. Detailed Implementation

[0024] The embodiments of this utility model are described in detail below. Examples of these embodiments are shown in the accompanying drawings, wherein the same or similar reference numerals denote the same or similar elements or elements having the same or similar functions throughout. The embodiments described below with reference to the accompanying drawings are exemplary and are only used to explain this utility model, and should not be construed as limiting this utility model.

[0025] In the description of this utility model, it should be understood that the terms front, back, up, down, axial, circumferential, etc., indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings. They are only for the convenience of describing this utility model and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation. Therefore, they should not be construed as limitations on this utility model.

[0026] In the description of this utility model, "multiple" means two or more; "greater than," "less than," and "exceeding" are understood to exclude the stated number; "above," "below," and "within" are understood to include the stated number. The use of "first" and "second" in the description is merely for distinguishing technical features and should not be construed as indicating or implying relative importance, or implicitly specifying the number of indicated technical features or their sequential relationship.

[0027] In the description of this utility model, it should be noted that terms such as "setting," "installing," and "connecting" should be interpreted broadly, and those skilled in the art can reasonably determine the specific meaning of the above terms in this utility model in conjunction with the specific content of the technical solution.

[0028] The technical solution of this utility model will be clearly and completely described below with reference to the accompanying drawings. Obviously, the embodiments described below are some embodiments of this utility model, not all embodiments.

[0029] When a camera module needs quality testing, a camera testing device is required to simulate telephoto imaging at a relatively close distance. This testing device typically uses a relay lens module 200 in conjunction with the camera module. The camera testing device has multiple testing stations, each equipped with an image test card and a relay lens module. During testing, the camera module is moved below the relay lens module, ensuring that the optical centers of the image test card, the relay lens module, and the camera module are aligned in a straight line. The camera module is tested sequentially through multiple testing stations to ensure accurate test results.

[0030] The camera testing device includes multiple testing stations, each of which includes a debugging bracket and a relay lens module 200.

[0031] The debugging bracket has a through mounting hole at the top and bottom. The repeater lens module 200 is installed in the mounting hole. Multiple debugging screws are provided around the debugging bracket. The debugging screws are connected to the repeater lens module 200. Turning any one of the debugging screws changes the position of the central axis of the repeater lens module 200.

[0032] Reference Figures 1 to 4 As shown, this utility model provides a relay lens center correction fixture, which is applied to the above-mentioned camera testing device.

[0033] The relay lens center correction fixture includes a body 100.

[0034] The top of the main body 100 is provided with a mounting part 110, and the bottom of the main body 100 is provided with a light-transmitting tube 120. The bottom of the light-transmitting tube 120 is provided with a light-transmitting hole 121 that extends upward through the mounting part 10.

[0035] The mounting part 110 is used to connect the bottom of the relay lens module 200 in the assembly hole of the debugging bracket. When the mounting part 110 is connected to the relay lens module 200, the central axis of the light-transmitting hole 121 coincides with the central axis of the relay lens module 200.

[0036] When calibrating the relay lens module 200 at a certain test station, the mounting part 110 of the main body 100 is connected to the relay lens module 200, so that the central axis of the light-transmitting hole 121 coincides with the central axis of the relay lens module 200.

[0037] Using the axis of the light-transmitting hole 121 of the light-transmitting tube 120 as the debugging target of the debugging bracket, since the axis of the light-transmitting hole 121 coincides with the central axis of the relay lens module 200, it can be ensured that the debugging bracket adjusts the position of the central axis of the relay lens module 200.

[0038] The standard camera below adjusts its position according to the axis of the light-transmitting hole 121 so that the optical centers of the image test card, the relay lens module 200 and the standard camera module are on the same straight line, thereby completing the central axis correction of the relay lens module 200.

[0039] Then, the main body 100 is disassembled and installed on the relay lens module 200 of another test station. The above steps are repeated until the relay lens modules 200 of all test stations are calibrated. Therefore, the debugging brackets of multiple test stations use the same main body 100 as the debugging target, and the main body 100 is directly connected to the relay lens module 200, so that the deviation direction of multiple relay lens modules 200 within the tolerance range is consistent, which helps to improve the consistency of optical tilt of multiple test stations.

[0040] In some embodiments, refer to Figure 1 , Figure 3 and Figure 4 As shown, the top of the mounting part 110 is provided with a mounting cavity 111, which is used to mount the bottom of the relay lens module 200. The mounting cavity 111 is provided with a reference platform 112, which protrudes upward. The axis of the light-transmitting hole 121 is perpendicular to the top surface of the reference platform 112. When the relay lens module 200 is installed into the mounting cavity 111, the bottom surface of the relay lens module 200 abuts against the top surface of the reference platform 112.

[0041] Using the top surface of the reference stage 112 as the positioning reference for the relay lens module 200 ensures that the axis of the light-transmitting hole 121 is perpendicular to the top surface of the reference stage 112, while the bottom surface of the relay lens module 200 is perpendicular to its own central axis. This helps to ensure that the central axis of the light-transmitting hole 121 is parallel to the central axis of the relay lens module 200.

[0042] In some embodiments, refer to Figure 1 , Figure 3 ,Figure 4 As shown, the side wall of the mounting cavity 111 is provided with a limiting surface 113. The limiting surface 113 is arranged vertically, and a clearance groove 114 is provided between the limiting surface 113 and the reference platform 112. When the bottom of the relay lens module 200 is installed into the mounting cavity 111, the side wall of the relay lens module 200 abuts against the limiting surface 113.

[0043] The limiting surface 113 restricts the degree of freedom of the relay lens module 200 in the horizontal direction, ensuring that the central axis of the relay lens module 200 coincides with that of the light-transmitting hole 121. The clearance groove 114 avoids the angle between the limiting surface 113 and the reference stage 112 from hindering the installation of the relay lens module 200, ensuring that the relay lens module 200 is accurately installed in the mounting cavity 111.

[0044] In some embodiments, refer to Figure 1 and Figure 3 As shown, the edge of the reference platform 112 is chamfered, and the top edge of the limiting surface 113 is chamfered.

[0045] The edges of the reference platform 112 and the top edges of the limiting surface 113 are chamfered to prevent sharp edges from scratching the relay lens module 200 during installation.

[0046] In some embodiments, refer to Figure 4 As shown, the bottom surface of the relay lens module 200 is provided with a protrusion 210, which protrudes downward. After the relay lens module 200 is installed into the mounting cavity 111 of the mounting part 110, the bottom surface of the relay lens module 200 abuts against the top surface of the reference platform 112. There is a space between the reference platform 112 and the outer side wall of the protrusion 210, and there is a space between the bottom wall of the mounting cavity 111 and the bottom of the protrusion 210.

[0047] The mounting cavity 111 and the reference platform 112 avoid the protrusion 210 at the bottom of the relay lens module 200. The reference platform 112 abuts against the non-working surface of the relay lens module 200 to avoid scratching the working surface of the relay lens module 200.

[0048] In some embodiments, refer to Figure 1 and Figure 3 As shown, the relay lens center correction fixture is also equipped with a fastener 300, which is detachably connected to the mounting part 110 and the bottom of the relay lens module 200.

[0049] Fastener 300 is connected to the bottom of mounting part 110 and relay lens module 200 from the bottom of the mounting hole of the debugging bracket, making the connection between mounting part 110 and relay lens module 200 more convenient.

[0050] In some embodiments, refer to Figure 4 andFigure 1 As shown, there are two or more fasteners 300, and the fasteners 300 are distributed circumferentially around the light-transmitting cylinder 120.

[0051] Multiple fasteners 300 are arranged at intervals along the circumference of the light-transmitting tube 120. The multiple fasteners 300 connect the mounting part 110 and the relay lens module 200, which helps to make the connection more secure.

[0052] In some embodiments, refer to Figure 2 and Figure 1 As shown, fastener 300 is a screw.

[0053] The screws are easy to replace and have a high connection precision.

[0054] In some embodiments, refer to Figure 2 and Figure 1 As shown, the outer wall of the light-transmitting tube 120 is provided with an orientation mark 122.

[0055] When the main body 100 is installed sequentially at multiple different test stations, the installation direction of the main body 100 is positioned by the orientation mark 122 to ensure that the direction and angle of the connection between the main body 100 and the multiple relay lens modules 200 are consistent, thereby avoiding the deviation of the multiple relay lens modules 200 from the direction due to different installation gaps caused by changes in direction or angle.

[0056] In some embodiments, refer to Figure 2 Figure 1 Figure 2 Figure 2 As shown, a positioning ring 123 is provided on the bottom end face of the light-transmitting tube 120, and the central axis of the light-transmitting hole 121 coincides with the center of the positioning ring 123.

[0057] The standard camera is moved with the center of the positioning ring 123 as the target, so that the optical center of the standard camera is adjusted to be below the center of the positioning ring 123. This helps the standard camera to move into position quickly. After the position of the central axis of the relay lens module 200 is adjusted, the position of the positioning ring 123 is changed, and the standard camera quickly moves into position according to the center of the moved positioning ring 123, so that the central axis of the light-transmitting hole 121 and the optical center of the standard camera are on the same straight line.

[0058] The embodiments of the present utility model have been described in detail above with reference to the accompanying drawings. However, the present utility model is not limited to the above embodiments. Within the knowledge possessed by those skilled in the art, various changes can be made without departing from the spirit of the present utility model.

Claims

1. A relay lens center correction fixture, characterized in that, A camera testing device, comprising a relay lens module and a debugging bracket, wherein the debugging bracket adjusts the central axis position of the relay lens module, and the relay lens center calibration fixture includes: The main body has a mounting part at the top for detachably connecting the relay lens module, and a light-transmitting tube at the bottom of the main body with a light-transmitting hole that passes through the mounting part. When the mounting part is connected to the relay lens module, the central axis of the relay lens module coincides with the axis of the light-transmitting hole.

2. The relay lens center correction fixture according to claim 1, characterized in that, The top of the mounting part is provided with a mounting cavity, and the mounting cavity is provided with a reference platform. The top surface of the reference platform is perpendicular to the axis of the light-transmitting hole, and the top surface of the reference platform is used to abut against the bottom surface of the relay lens module.

3. The relay lens center correction fixture according to claim 2, characterized in that, The side wall of the mounting cavity is provided with a limiting surface, which is used to abut against the side of the relay lens module, and a clearance groove is provided between the limiting surface and the reference platform.

4. The relay lens center correction fixture according to claim 3, characterized in that, The edge of the reference platform is chamfered and / or the top edge of the limiting surface is chamfered.

5. The relay lens center correction fixture according to claim 2, characterized in that, The bottom of the relay lens module is provided with a downward protrusion. When the top surface of the reference platform abuts against the bottom surface of the relay lens module, there is a space between the protrusion and the reference platform, and there is a space between the bottom of the protrusion and the bottom wall of the mounting cavity.

6. The relay lens center correction fixture according to claim 1, characterized in that, The relay lens center correction fixture also includes: Fasteners for detachably connecting the mounting portion to the relay lens module.

7. The relay lens center correction fixture according to claim 6, characterized in that, There are multiple fasteners, and the multiple fasteners are distributed at intervals along the circumference of the light-transmitting cylinder.

8. The relay lens center correction fixture according to claim 6, characterized in that, The fastener is a screw.

9. The relay lens center correction fixture according to claim 1, characterized in that, The outer wall of the light-transmitting tube is provided with directional markings.

10. The relay lens center correction fixture according to claim 1, characterized in that, The bottom end face of the light-transmitting tube is provided with a positioning ring, and the center of the positioning ring coincides with the axis of the light-transmitting hole.

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