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

An integration time, aerospace technology, applied in the field of linear array CCD camera system, can solve the problems of imaging quality and deterioration without electronic shutter, and achieve the best performance and flexible control

Inactive Publication Date: 2011-10-05
CHANGCHUN INST OF OPTICS FINE MECHANICS & PHYSICS CHINESE ACAD OF SCI
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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 co...

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

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specific Embodiment approach 1

[0014] Specific implementation mode 1. Combination figure 2 with image 3 Describe this embodiment, based on the linear array CCD camera system with adjustable integration time for aerospace applications, the system includes a linear array CCD image sensor, a high-speed horizontal drive circuit, a low-speed horizontal drive circuit, a preamplifier, a video signal processor, and a camera internal Controller, camera external controller, data interface circuit and vertical drive circuit, the image plane of the lens is coupled to the focal plane of the linear array CCD image sensor, the camera external controller sends commands to the camera internal controller through the serial port; the camera internal controller According to the commands received from the external controller of the camera, the vertical transfer timing signals required for the work of the line array CCD image sensor, two sets of horizontal transfer timing signals that work alternately in different stages, the ...

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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...

Claims

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Application Information

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IPC IPC(8): H04N5/232H04N5/235
Inventor 余达周怀得李广泽李云飞李洪法刘金国郭永飞
Owner CHANGCHUN INST OF OPTICS FINE MECHANICS & PHYSICS CHINESE ACAD OF SCI
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