Large-diameter parallel light pipe wavefront and image surface position calibration device and method

Abstract

The invention belongs to the field of photoelectricity testing and relates to a large-diameter parallel light pipe wavefront and image surface position calibration device and method. The device comprises a fiber laser, a two-dimension precision long guiding track, a CCD camera and a control unit. The method comprises the steps that (1) the CCD camera is arranged on the two-dimension precision long guiding track; (2) fiber laser power is adjusted until the CCD camera can receive fiber laser light intensity; (3) the CCD camera obtains center-of-mass coordinates of image points emitted by the fiber laser at different positions of the two-dimension precision long guiding track; (4) the CCD camera obtains center-of-mass coordinates of image points emitted by a parallel light pipe to be calibrated at different positions of the two-dimension precision long guiding track; (5) the wavefront position of the parallel light pipe to be calibrated is determined; and (6) the image surface position of the parallel light pipe to be calibrated is determined. Accurate testing of large-diameter parallel light pipe wavefront and focal plane positions can be achieved.

Description

technical field [0001] The invention belongs to the field of photoelectric testing, and relates to a device and method for calibrating wavefront and image plane positions of a large-diameter collimator. Background technique [0002] The collimator is an optical precision measurement device used to simulate an infinite target in the laboratory, emit parallel light beams, and measure the imaging quality and performance parameters of an optical system or camera. [0003] In recent years, due to the rapid development of my country's aerospace and aviation technology, especially the implementation of high-resolution projects, the imaging quality and ground resolution of space cameras have become higher and higher, and the focal length and aperture of cameras have also become larger and larger. Therefore, it is required to detect the optical precision measurement equipment of long focal length, large-aperture camera imaging quality and performance parameters-the aperture and focal ...

AI Technical Summary

Problems solved by technology

The existing problem is that when the aperture of the light pipe increases, the aperture of the reflector also increases accordingly, and the surface shape of the reflector itself cannot be accurately measured. In addition, the material and processing costs of the reflector are also doubled, and the measurement method is affected by the environment and human subjectivity. Sexual influences lead to large measurement errors

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