GaAsP-I.I.を用いたVTR一体型ハイビジョン超高感度カメラ(<小特集>イメージセンシング技術とその応用)

概要

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This ultrahigh-sensitivity HDTV color camcorder uses a proximity-type image intensifier employing 3rd-generation GaAsP photocathodes. In order to accomodate a video cassette recorder (VCR) within the camera, thereby reduce the weight and increase the image quality, a compact optical unit consisting of an enlarger lens and tapered fiber optics plate (FOP) was developed. The camcorder can be equipped with a high-speed gate shutter with speeds up to one per microsecond by pulsing the voltage to the photocathode. The camcorder provides good color reproducibility under moonlight, and a signal level of 100% was obtained at 0.2lx, f/2 (signal-to-noise ratio of 56dB). Its sensitivity is about 400 times greater than that of current HDTV CCD camcorders, making it particularly well suited for shooting faint objects such as auroras and nocturnal animals.
社団法人映像情報メディア学会の論文
2004-03-01