Aerospace-application-based integration time adjustable linear array charge coupled device (CCD) camera system

Abstract

The invention discloses an aerospace-application-based integration time adjustable linear array charge coupled device (CCD) camera system, which relates to the technical field of CCD application in aerospace and solves the problem that the conventional linear array CCD image sensor does not have any electronic shutter or imaging quality is lowered after the electronic shutter is used at exposure control time in aerospace application. The system divides each line period into a blank scanning stage before exposure, an exposure stage and a linear array CCD image sensor useful charge reading stage. Relatively lower horizontal transfer signals are adopted in the blank scanning stage and the linear array CCD image sensor useful charge reading stage, and relatively higher horizontal transfer signals are adopted in the exposure stage. Two independent groups of horizontal drive circuits are adopted and alternately work in the line period to optimize the performance of the linear array CCD camera system at the frequency of the two kinds of horizontal transfer signals. The system is flexibly controlled and applied to various application requirements.

Description

technical field [0001] The invention relates to the technical field of CCD application in aerospace, in particular to a linear array CCD camera system with adjustable integration time. Background technique [0002] In the field of aerospace, a large number of linear array CCD image sensors are used to complete the task of image capture. To complete the image capture task normally, a prerequisite is that the linear array CCD image sensor must be properly exposed to obtain a clear image, and neither underexposure nor overexposure can obtain a clear image. This is usually done by controlling the brightness of the target light and line The exposure time of the array CCD image sensor is realized. But in most cases, the illumination brightness of the target cannot be controlled, which can only control the integration time of the linear CCD image sensor. [0003] Since the linear array CCD camera system is always in motion relative to the ground, image motion occurs, and the line...

AI Technical Summary

Problems solved by technology

[0008] In order to solve the problem that the existing linear array CCD image sensor has no electronic shutter or the imaging quality becomes worse after using the electronic shutter when controlling the exposure time in aviation and aerospace applications, the present invention provides a linear array with adjustable integration time based on aerospace applications CCD camera system

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