Aerospace three linear array CCD camera vision main point on-rail monitoring method

Abstract

The invention relates to an aerospace three linear array CCD camera vision main point on-rail monitoring method, wherein a laser emitting device is rigidly fixed on a camera lens; and a first area array CCD and a second area array CCD are symmetrically and rigidly fixed on both sides of the linear array CCD. The position of camera lens is adjusted so that the main optical axis of the camera lens passes through the center of the linear array CCD; simultaneously, the position of laser emitting device is adjusted so that two ways of lasers output by the laser emitting device are symmetrically incident into the camera lens relative to the main optical axis and respectively transmitted to the first area array CCD and the second area array CCD by the camera lens. The variation volume of camera vision main point can be determined by the displacement change of the imaging point of laser beam on the first area array CCD in horizontal and vertical directions and the displacement change of imaging point of laser beam on the second area array CCD in horizontal and vertical directions. The invention uses non-contact measuring method without affecting the normal work of camera, thereby realizing the nano-scale high-precision measurement of vision main point change.

Description

technical field [0001] The invention belongs to the technical field of aerospace satellite photogrammetry, and relates to an on-orbit monitoring method for the change of the principal point of view of an aerospace three-line array CCD camera. Background technique [0002] The principal point of view of the aerospace three-line array CCD camera is the intersection point of the main optical axis of the camera lens and the linear array CCD. It is an important internal parameter of the aerospace camera and directly affects the accuracy of the photogrammetry of the aerospace satellite. At present, the position of the apparent principal point of the three-line array CCD camera in the spaceflight can be determined by precise verification in the ground laboratory before launch, but after the satellite is launched into the sky, due to the influence of weightlessness and temperature changes during the satellite’s in-orbit flight, it will cause spaceflight The main point of view of the...

AI Technical Summary

Problems solved by technology

However, this method is very complicated and time-consuming. It is suitable for regular inspection of the accuracy of the principal point of view of the camera, and cannot be used for real-time monitoring. It is not suitable for global satellite photogrammetry without ground control points.

Images