Dr. Weiqiang Guo Profile

Dr. Weiqiang Guo

at CIOMP

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Proceedings Article | 22 January 2008 Paper

Driving techniques for high frame rate CCD camera

Weiqiang Guo, Longxu Jin, Jingwu Xiong

Proceedings Volume 6833, 683339 (2008) https://doi.org/10.1117/12.760841

KEYWORDS: CCD cameras, Charge-coupled devices, Clocks, Amplifiers, Cameras, Signal processing, Video, Video compression, Mechanics, Physics

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This paper describes a high-frame rate CCD camera capable of operating at 100 frames/s. This camera utilizes Kodak KAI-0340, an interline transfer CCD with 640(vertical)×480(horizontal) pixels. Two output ports are used to read out CCD data and pixel rates approaching 30 MHz. Because of its reduced effective opacity of vertical charge transfer registers, interline transfer CCD can cause undesired image artifacts, such as random white spots and smear generated in the registers. To increase frame rate, a kind of speed-up structure has been incorporated inside KAI-0340, then it is vulnerable to a vertical stripe effect. The phenomena which mentioned above may severely impair the image quality. To solve these problems, some electronic methods of eliminating these artifacts are adopted. Special clocking mode can dump the unwanted charge quickly, then the fast readout of the images, cleared of smear, follows immediately. Amplifier is used to sense and correct delay mismatch between the dual phase vertical clock pulses, the transition edges become close to coincident, so vertical stripes disappear. Results obtained with the CCD camera are shown.

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