A dynamic scanning wide-format imaging control system and method based on two-dimensional fast mirrors

Abstract

The present invention proposes a dynamic scanning wide-width imaging control system and method based on a two-dimensional fast mirror, aiming at simplifying the imaging system, improving compensation capability and precision, and realizing higher imaging efficiency. In the dynamic scanning wide-format imaging control system based on two-dimensional fast mirrors, the area array camera adopts a catadioptric optical system, and a two-dimensional fast mirror (FSM) is installed inside; the two-dimensional fast mirror is composed of two-dimensional fast Composed of a driving mechanism and a mirror, the mirror is used as the secondary mirror of the area array camera; the rolling scanning frame of the one-dimensional scanning platform dynamically scans along the wingspan direction relative to the inertial space at a set speed, and within the exposure time, the control unit According to the POS data and the angular velocity of the two gyroscopes, the trajectory of the synthetic optical axis is calculated to obtain the control command of the two-dimensional fast mirror, which drives the secondary mirror of the area array camera to deflect along the roll and pitch directions to achieve forward image shift and scan image Disturbance compensation for moving and flying platforms.

Description

technical field [0001] The invention relates to a wide scanning imaging control system and method. Background technique [0002] In order to realize wide-format scanning imaging, it is necessary to drive the area array camera to perform dynamic scanning, and perform multiple exposure imaging in the scanning area to achieve wide-format imaging. Scanning motion, aircraft flight motion, and attitude disturbance will all cause the inner boresight axis to move during the exposure period of the area array camera, resulting in image motion and motion blur in the imaging image. Therefore, during the imaging process, it is necessary to isolate the attitude disturbance, compensate the scanning image motion and flight image motion, stabilize the boresight, and realize clear imaging during the scanning process. [0003] There are mainly two methods for compensating forward image motion in existing wide-format scanning cameras. One is to increase the inner pitch frame on the basis of t...

AI Technical Summary

Problems solved by technology

This control scheme requires repeated "start-stop" control of the scanning mechanism. The acceleration and deceleration process of "start-stop" conversion and the stabilization process of the mechanism take a long time, the imaging efficiency is low, and an additional stable platform is required, which increases the system cost and mechanical mechanism

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