Method for aligning camera and light tube in vacuum environment
A vacuum environment, camera technology, applied in the direction of measuring devices, instruments, etc., can solve the problems of misalignment of the camera and the light pipe, inability to align the camera and the light pipe, difficult to accurately align the camera and the light pipe, etc., to solve the problem of unstable testing. Effect
Pending Publication Date: 2021-11-30
CHANGCHUN INST OF OPTICS FINE MECHANICS & PHYSICS CHINESE ACAD OF SCI
View PDF0 Cites 0 Cited by
- Summary
- Abstract
- Description
- Claims
- Application Information
AI Technical Summary
Problems solved by technology
But for large-aperture cameras, the deformation of the tank body and the change of the vibration isolation platform will cause relative misalignment of the camera and light pipe
Therefore, the alignment position of the camera and light pipe after vacuuming may be different from that before vacuuming, so after vacuuming, the target image originally formed on the detector is easily lost
Also for many infrared cameras, the normal pressure environment does not allow the focal plane to be turned on, so for this case, it is difficult to accurately align the camera and the light pipe in the normal pressure environment
[0005] For small-aperture aerospace cameras, the MTF test is generally carried out in a normal pressure environment, so the test personnel can observe the position of the imaging spot on the spot and then adjust the camera posture to make the camera and the light pipe fully aligned. In a vacuum environment, since the test personnel cannot participate in the scene, it cannot be carried out through observation. Camera to Lightpipe Alignment
Method used
the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
View moreImage
Smart Image Click on the blue labels to locate them in the text.
Smart ImageViewing Examples
Examples
Experimental program
Comparison scheme
Effect test
Embodiment Construction
[0027] Hereinafter, embodiments of the present invention will be described with reference to the accompanying drawings. In the following description, the same blocks are denoted by the same reference numerals. With the same reference numerals, their names and functions are also the same. Therefore, its detailed description will not be repeated.
[0028] In order to make the object, technical solution and advantages of the present invention clearer, the present invention will be further described in detail below in conjunction with the accompanying drawings and specific embodiments. It should be understood that the specific embodiments described here are only used to explain the present invention, but not to limit the present invention.
[0029] Combine below Figure 1 to Figure 4 The concrete mode of work of the present invention is described in detail:
[0030] Such as Figure 4 As shown, the present invention proposes a method for aligning the camera 2 and the light pip...
the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
Login to View More PUM
Login to View More Abstract
The invention provides a method for aligning a camera and a light tube in a vacuum environment. The method comprises the following steps: S1, switching a light tube target plate to a light through hole; S2, lightening an integrating sphere, and then turning on a detector; S3, taking the installation position of the camera as an original point O, and establishing a space rectangular coordinate system; S4, in the YOZ plane, fixing the camera at a swing angle, and in the XOZ plane, rotating the camera around the original point O, and when a lighting target appears on the detector, stopping rotating; and S5, switching the light tube target plate to a stripe target, and adjusting the camera until the camera is aligned with the stripe target, wherein the position of the camera at the moment is the position completely aligned with the light pipe. According to the invention, alignment of the camera and the light tube in the vacuum environment is realized, then MTF testing of the camera in the vacuum environment can be carried out, and the problems of unstable testing and low efficiency caused by airflow disturbance during normal-pressure environment detection of a large-aperture long-focal-length aerospace camera are solved.
Description
technical field [0001] The invention relates to the field of MTF testing of a camera system, in particular to a method for aligning a camera and a light pipe in a vacuum environment. Background technique [0002] After the aerospace camera is integrated, the MTF test of the camera system is required. The test method is to simulate the target by using the light pipe of the same caliber, and test the camera imaging method. That is, the target is placed at the focal plane of the light pipe, and parallel light is emitted after passing through the light pipe, and then the target is imaged on the camera detector after being focused by the camera. [0003] With the increase of the focal length and aperture of the camera, it is difficult to detect the real image quality of the camera due to the disturbance of the air flow in the normal pressure environment. Therefore, using a vacuum environment for MTF testing can more efficiently and accurately obtain the real results of camera im...
Claims
the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
Login to View More Application Information
Patent Timeline
Login to View More IPC IPC(8): G01C25/00
CPCG01C25/00
Inventor郭疆李元鹏孙继明邵明东齐洪宇
OwnerCHANGCHUN INST OF OPTICS FINE MECHANICS & PHYSICS CHINESE ACAD OF SCI