CN210242713U - Detection apparatus for camera detector is directional and focal plane subassembly installation face contained angle - Google Patents

Detection apparatus for camera detector is directional and focal plane subassembly installation face contained angle Download PDF

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Publication number
CN210242713U
CN210242713U CN201921140391.1U CN201921140391U CN210242713U CN 210242713 U CN210242713 U CN 210242713U CN 201921140391 U CN201921140391 U CN 201921140391U CN 210242713 U CN210242713 U CN 210242713U
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focal plane
camera detector
axis track
assembly
test
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CN201921140391.1U
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Inventor
Zhengfeng Wang
王争锋
Xun Xue
薛勋
Jianke Zhao
赵建科
Yan Zhou
周艳
Jie Zhang
张洁
Kai Liu
刘锴
Dandan Hu
胡丹丹
Shangkuo Liu
刘尚阔
Kewei E
鄂可伟
Ziyan Chen
陈孜妍
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XiAn Institute of Optics and Precision Mechanics of CAS
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XiAn Institute of Optics and Precision Mechanics of CAS
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Abstract

The utility model discloses a detection apparatus for camera detector is directional and focal plane subassembly installation face contained angle, include: a test component and a data processing component; the test assembly comprises a light sensing surface of a camera detector to be tested and a focal plane assembly mounting surface, the mounting surface of the focal plane assembly is placed on the test platform upwards, and the Y-axis track is located on one side end surface of the test platform; the movable rod can move on an XZ plane through the X-axis track and the Z-axis track; the microscopic measurement unit can clearly image the photosensitive surface of the camera detector to be measured and the mounting surface of the focal plane component; the device carries out point acquisition and fitting on a light sensing surface of a camera detector to be tested and a focal plane component mounting surface, so that the included angle value and the included angle direction of the light sensing surface and the focal plane component can be solved, the included angle between the direction of the detector in the focal plane component and the optical axis of an optical system is reflected, and the process of testing optical indexes is converted into mechanical dimension testing; the device has the advantages of simple structure, easy operation, high detection result precision, small error and good adaptability.

Description

Detection apparatus for camera detector is directional and focal plane subassembly installation face contained angle
Technical Field
The utility model relates to an optical detection technical field, concretely relates to detection device of directional and burnt face subassembly installation face contained angle of camera detector.
Background
Generally, a camera comprises a focal plane assembly and an optical system, the direction of a detector in the focal plane assembly is not coaxial with the optical axis of the optical system, so that each field of view of the camera can be out of focus, the imaging quality is reduced, and the direction of the detector in the focal plane assembly and the coaxiality of the optical axis of the optical system are key indexes in the camera adjustment detection process. The camera focal plane assembly and the optical system are connected with the heat insulation pad through the mounting surface, and the included angle between the pointing direction of the detector in the focal plane assembly and the optical axis of the optical system can be reflected by the included angle between the pointing direction of the camera detector and the mounting surface of the focal plane assembly. Meanwhile, the contact ratio of the detector pointing direction and the optical system optical axis in the focal plane assembly is adjusted through the thickness and the shape of the heat insulation pad arranged between the installation surfaces, so that the problem that the detector pointing direction and the optical system optical axis in the focal plane assembly are not coaxial can be solved by determining the parameters of the heat insulation pad.
In the prior art, a method for testing an included angle between the direction of a detector in a focal plane assembly and an optical axis of an optical system comprises the following steps: the size of optical indexes (optical transfer function, diffuse spot, point spread function and the like) of different fields of view of the camera is tested, the included angle between the detector pointing direction in the focal plane assembly and the optical axis of the optical system and the optimal focal plane are obtained through analysis, and the detector pointing direction in the focal plane assembly and the optical axis of the optical system are coaxial through trimming the thickness and the shape of the heat insulation pad. However, the method has the disadvantages that the test result is greatly influenced by the environment and is inaccurate, so that repeated tests and repeated processing of the heat insulation pad are caused, and time and labor are wasted.
Therefore, in the phase of camera adjustment detection, it is necessary to establish a set of device for accurately measuring the included angle between the detector orientation in the focal plane assembly and the optical axis of the optical system, i.e. the included angle between the camera detector orientation and the installation surface of the focal plane assembly.
SUMMERY OF THE UTILITY MODEL
An object of the utility model is to provide a detection apparatus of camera detector sensing and burnt face subassembly installation face contained angle to solve prior art to the inaccurate and complicated problem of operation of camera detector sensing and burnt face subassembly installation face contained angle measuring result.
In order to solve the technical problem, the utility model provides a detection apparatus for camera detector is directional and focal plane subassembly installation face contained angle, include: a test component and a data processing component;
the test assembly comprises an air floatation platform, a test platform, a gantry support, a moving rod, a micro-measurement unit, an X-axis track, a Y-axis track and a Z-axis track; the data processing assembly comprises a controller and processing software;
the X-axis track, the Y-axis track and the Z-axis track are distributed in the direction of a three-dimensional coordinate axis; the mounting surfaces of a light sensing surface and a focal plane component of a camera detector to be tested are placed on the test platform in an upward mode, the test platform and the Y-axis track are both arranged on the air floating platform, and the Y-axis track is located on one side end face of the test platform; the gantry support is erected on the air floatation platform, the X-axis track is arranged on a cross beam of the gantry support, the Z-axis track is arranged on the movable rod, and the movable rod can move on an XZ plane through the X-axis track and the Z-axis track; the microscopic measuring unit is arranged on the lower end surface of the movable rod and can clearly image the light sensing surface of the camera detector to be measured and the installation surface of the focal plane component;
the controller is connected with the test assembly through a transmission line and is used for controlling a power supply and operating the test assembly; the processing software is used for processing the information of the acquisition points on the mounting surfaces of the camera detector to be detected and the focal plane assembly, and performing fitting and operation.
Further, in the detection device for the included angle between the direction of the camera detector and the installation surface of the focal plane assembly, the test assembly is characterized by further comprising a light source, wherein the light source surrounds the microscopic measurement unit and is arranged on the lower end surface of the movable rod.
Further, in the detection device for detecting the included angle between the direction of the camera detector and the installation surface of the focal plane assembly, the information accuracy of the acquisition point is less than 0.8 μm.
Furthermore, in the detection device for detecting the included angle between the direction of the camera detector and the installation surface of the focal plane component, the number of acquisition points on the photosensitive surface of the camera detector to be detected is n, wherein n is more than or equal to 8.
Furthermore, in the detection device for detecting the included angle between the direction of the camera detector and the installation surface of the focal plane component, the number of the acquisition points on the installation surface of the focal plane component to be detected is m, wherein m is 8.
The detection device of camera detector orientation and focal plane subassembly installation face contained angle's advantage as follows:
the device carries out point acquisition and fitting on a light sensing surface of a camera detector to be tested and a focal plane assembly mounting surface, so that the included angle value and the included angle direction of the light sensing surface and the focal plane assembly can be obtained, the included angle between the direction of the detector in the focal plane assembly and the optical axis of an optical system is reflected, the process of testing optical indexes is converted into mechanical dimension testing, and the influence of temperature, airflow and vibration is extremely small; the device has simple structure, easy operation, high precision of detection result and small error; meanwhile, the device has good adaptability and can be applied to the measurement of the included angle between the direction of a detector in various camera focal plane components and the optical axis of an optical system.
Drawings
Fig. 1 is a schematic structural diagram of a device for detecting an included angle between the orientation of a camera detector and a focal plane assembly mounting surface provided by the present invention;
FIG. 2 is a schematic diagram of the microscopic measuring unit, the camera detector to be measured and the focal plane assembly provided by the present invention;
wherein the content of the first and second substances,
1-a camera detector; 2-focal plane component mounting surface; 3-X axis orbit; a 4-Y axis orbit; 5-moving the rod; 6-a microscopic measuring unit; 7-an air floatation platform; 8-a light source; 9-a controller; 10-processing software; 11-a test platform; 12-gantry support.
Detailed Description
To make the objects, advantages and features of the present invention clearer, the following detailed description of the present invention provides a device for detecting the orientation of a camera detector and the included angle between the installation surfaces of a focal plane assembly. The advantages and features of the present invention will become more fully apparent from the following description and appended claims. It should be noted that: the drawings are in a very simplified form and are not to precise scale, and are provided solely for the purpose of facilitating and distinctly aiding in the description of the embodiments of the present invention; secondly, the structures shown in the drawings are often part of the actual structure; again, the drawings may require different emphasis, sometimes on different proportions.
Referring to fig. 1 and fig. 2, the present embodiment provides a device for detecting an included angle between a pointing direction of a camera detector 1 and a focal plane assembly mounting surface 2, including: a test component and a data processing component;
the test assembly comprises an air floating platform 7, a test platform 11, a gantry support 12, a moving rod 5, a micro-measurement unit 6, an X-axis track 3, a Y-axis track 4 and a Z-axis track (not shown in the figure); the data processing component comprises a controller 9 and processing software 10;
the X-axis track 3, the Y-axis track 4 and the Z-axis track are distributed in the direction of a three-dimensional coordinate axis; the mounting surfaces 2 of the photosensitive surface and the focal surface component of the camera detector 1 to be tested are upwards placed on the test platform 11, the test platform 11 and the Y-axis track 4 are both arranged on the air floating platform 7, and the Y-axis track 4 is positioned on one side end surface of the test platform 11; the gantry support 12 is erected on the air floating platform 7, the X-axis track 3 is arranged on a cross beam of the gantry support 12, the Z-axis track is arranged on the movable rod 5, and the movable rod 5 can move on an XZ plane through the X-axis track 3 and the Z-axis track; the microscopic measuring unit 6 is arranged on the lower end face of the movable rod 5 and can clearly image the light sensing surface of the camera detector 1 to be measured and the focal plane component mounting surface 2;
the controller 9 is connected with the test assembly through a transmission line and is used for controlling a power supply and operating the test assembly; the processing software 11 is used for processing the information of the acquisition points on the camera detector 1 to be detected and the focal plane assembly mounting surface 2, and performing fitting and operation. Preferably, the processing software is used for processing the information accuracy of the acquisition points on the installation surfaces of the camera detector to be detected and the focal plane assembly to be detected to be less than 0.8 μm.
Therefore, the air floating platform 7 is positioned at the bottom of the testing assembly and used for isolating the influence of vibration on the testing process, and the testing platform 11 is used for bearing the tested equipment; the controller 9 controls the test platform 11 to move along the Y-axis direction, and the moving rod 5 drives the microscopic measurement unit 6 to move on the XZ plane; the processing software 10 records the microscopic measuring unit 6 to the best observation position coordinates.
Specifically, the test platform 11 drives the micro-measurement unit 6 to move to a corresponding position on the XZ plane along the Y-axis direction by the moving rod 5, and the micro-measurement unit 6 performs reading and counting through a grating ruler, so that the micro-measurement unit 6 accurately performs point collection on the light-sensitive surface of the camera detector 1 to be measured and the focal plane assembly mounting surface 2. The device carries out point acquisition and fitting on a photosensitive surface of a camera detector 1 to be tested and a focal plane assembly mounting surface 2, so that the included angle value and the included angle direction of the photosensitive surface and the focal plane assembly can be obtained, the included angle between the direction of the detector in the focal plane assembly and the optical axis of an optical system is reflected, the process of testing optical indexes is converted into mechanical dimension testing, and the influence of temperature, airflow and vibration is extremely small; the device has simple structure, easy operation, high precision of detection result and small error; meanwhile, the device has good adaptability and can be applied to the measurement of the included angle between the direction of a detector in various camera focal plane components and the optical axis of an optical system.
Preferably, the test assembly further comprises a light source 8, and the light source 8 is arranged on the lower end surface of the movable rod 5 around the micro-measurement unit 6. Therefore, the light source 8 ensures sufficient illumination in the test process, improves the contrast of the background and the target during collection, and further improves the imaging precision and the collection precision.
In this embodiment, by using the apparatus for detecting the included angle between the pointing direction of the camera detector and the mounting surface of the focal plane component, the following steps can be performed to detect the included angle between the pointing direction of the camera detector 1 and the mounting surface 2 of the focal plane component:
step S1: placing a camera detector 1 to be tested on the test platform 11 with the light sensing surface and the focal plane component mounting surface 2 facing upwards;
step S2: operating the controller 9 to turn on the light source so that the light source illuminates around the microscopic measuring unit;
step S3: the controller 9 controls the micro-measurement unit 6 to move along the X-axis track 3 and the Z-axis track, and controls the test platform 11 to move along the Y-axis track 4, so that the micro-measurement unit 6 can clearly image the photosensitive surface of the camera detector 1 to be detected;
step S4: uniformly collecting n points on the photosensitive surface of the camera detector 1 to be detected, sending the collected point coordinates to a data processing assembly, fitting the collected point coordinates into a plane P1 through processing software 10 in the data processing assembly, and obtaining a normal vector of the plane P1 as
Step S5: repeating the step S3 to enable the microscopic measuring unit 6 to clearly image the focal plane component mounting surface 2 to be detected;
step S6: uniformly collecting m points on the focal plane component mounting surface 2 to be detected, and collecting the pointsThe coordinates are sent through the data processing assembly and fitted by the processing software 10 in the data processing assembly to the plane P2, and the normal vector of the plane P2 is obtained as
Step S7: the angle θ between plane P1 and plane P2 is calculated.
Therefore, clear imaging is observed when the microscopic measurement unit 6 is at the optimal position, normal vectors of the photosensitive surface of the camera detector 1 to be detected and the focal surface component mounting surface 2 can be respectively obtained by the processing software 10 according to coordinates of collection points imaged on the photosensitive surface of the camera detector 1 to be detected and the focal surface component mounting surface 2 to be detected, an included angle between the normal vectors is obtained to be an included angle between the normal vectors, the process of testing optical indexes is converted into a mechanical dimension test, the influence of temperature, airflow and vibration on measurement results is reduced, the precision of the detection results is improved, and errors are reduced; meanwhile, the device can be applied to the measurement of the included angle between the pointing direction of the detector in various camera focal plane assemblies and the optical axis of an optical system, so that the subsequent work of ensuring the pointing direction of the detector in the focal plane assemblies and the coaxial optical axis of the optical system by trimming the thickness and the shape of the heat insulation pad is easy to carry out.
Preferably, step S4: uniformly collecting n points on a photosensitive surface of a camera detector to be detected, wherein n is more than or equal to 8; step S7: and uniformly collecting m points on the mounting surface of the focal plane component to be detected, wherein m is 8. The microscope measuring unit 6 moves the microscope lens once when measuring one collecting point, and records different XYZ coordinates. Therefore, when the plane normal vector of the photosensitive surface and the focal plane component mounting surface 2 of the camera detector 1 to be detected is calculated, the workload can be reduced under the condition of ensuring the accuracy of the plane normal vector, the air outlet plane normal vector can be quickly, simply and conveniently calculated, and the accuracy of a subsequent detection result can be ensured.
Specifically, step S4 includes:
s41: uniformly collecting n points on the photosensitive surface of the camera detector 1 to be detected, and recording the coordinates of the collected points as (x)i,yi,zi);
S42: plane setting methodThe range ax + by + cz + d is 0, i.e., MX is 0 and the matrix M isThe matrix X isSolving matrix MTM;
S43: obtain a matrix MTThe eigenvector corresponding to the minimum eigenvalue of M is the solution of MX ═ 0, and the normal vector of the plane P1 isThe normal vector of the plane P2 is obtained by the same method
Preferably, step S7: it is known thatAndaccording to the formulaThe angle θ between plane P1 and plane P2 is calculated.
To sum up, be in the utility model provides an among the directional detection device with focal plane subassembly installation face contained angle of camera detector, have following advantage:
the device carries out point acquisition and fitting on a light sensing surface of a camera detector to be tested and a focal plane assembly mounting surface, so that the included angle value and the included angle direction of the light sensing surface and the focal plane assembly can be obtained, the included angle between the direction of the detector in the focal plane assembly and the optical axis of an optical system is reflected, the process of testing optical indexes is converted into mechanical dimension testing, and the influence of temperature, airflow and vibration is extremely small; the device has the advantages of simple structure, easy operation, high precision of detection results and small error.
Furthermore, the device has good adaptability and can be applied to the measurement of the included angle between the direction of a detector in various camera focal plane assemblies and the optical axis of an optical system.
Finally, it should be noted that the above description is only for the description of the preferred embodiments of the present invention, and not for any limitation on the scope of the present invention, and that any changes and modifications made by those skilled in the art according to the above disclosure are all within the scope of the appended claims.

Claims (5)

1. A camera detector is directional and detection device of focal plane subassembly installation face contained angle, its characterized in that includes: a test component and a data processing component;
the test assembly comprises an air floatation platform (7), a test platform (11), a gantry support (12), a moving rod (5), a micro-measurement unit (6), an X-axis track (3), a Y-axis track (4) and a Z-axis track; the data processing assembly comprises a controller (9) and processing software (10);
the X-axis track (3), the Y-axis track (4) and the Z-axis track are distributed in the direction of a three-dimensional coordinate axis; the device comprises a to-be-tested camera detector (1), a test platform (11), a Y-axis track (4) and a light-sensitive surface component mounting surface (2), wherein the light-sensitive surface and the focal surface component mounting surface (2) of the to-be-tested camera detector are upwards placed on the test platform (11), the test platform (11) and the Y-axis track (4) are arranged on the air floatation platform (7), and the Y-axis track (4) is located on one; the gantry support (12) is erected on the air floating platform (7), the X-axis track (3) is arranged on a cross beam of the gantry support (12), the Z-axis track is arranged on the movable rod (5), and the movable rod (5) can move on an XZ plane through the X-axis track (3) and the Z-axis track; the microscopic measuring unit (6) is arranged on the lower end face of the movable rod (5) and can clearly image the light sensing surface of the camera detector (1) to be measured and the focal plane component mounting surface (2);
the controller (9) is connected with the test assembly through a transmission line and is used for controlling the power supply and operating the test assembly; the processing software (10) is used for processing information of acquisition points on the camera detector (1) to be detected and the focal plane assembly mounting surface (2), and performing fitting and operation.
2. The apparatus for detecting the angle between the pointing direction of the camera detector and the installation surface of the focal plane assembly as claimed in claim 1, wherein the test assembly further comprises a light source (8), and the light source (8) is arranged on the lower end surface of the movable rod (5) around the micro-measurement unit (6).
3. The apparatus for detecting the included angle between the orientation of the camera detector and the installation surface of the focal plane assembly as claimed in claim 1, wherein the accuracy of the information of the acquisition point is less than 0.8 μm.
4. The device for detecting the included angle between the pointing direction of the camera detector and the installation surface of the focal plane component as claimed in claim 1, wherein the number of the acquisition points on the light-sensitive surface of the camera detector (1) to be detected is n, wherein n is more than or equal to 8.
5. The device for detecting the included angle between the pointing direction of the camera detector and the installation surface of the focal plane component as claimed in claim 1, wherein the number of the acquisition points on the installation surface (2) of the focal plane component to be detected is m, wherein m is 8.
CN201921140391.1U 2019-07-19 2019-07-19 Detection apparatus for camera detector is directional and focal plane subassembly installation face contained angle Active CN210242713U (en)

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CN201921140391.1U CN210242713U (en) 2019-07-19 2019-07-19 Detection apparatus for camera detector is directional and focal plane subassembly installation face contained angle

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