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Proceedings Paper

Super high sensitive camera tube for HDTV hand-held cameras
Author(s): Masakazu Nanba; Yoshiro Takiguchi; Toshio Yamagishi; Misao Kubota; Saburo Okazaki; Tsutomu Kato; Kenkichi Tanioka; Tadaaki Hirai; Yukio Takasaki
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Paper Abstract

We have developed a compact HDTV camera tube that combines high sensitivity with high resolution and is compact enough for hand-held cameras. This new camera tube employs an 8-micrometers -thick HARP (High-gain Avalanche Rushing amorphous Photoconductor) target. Unlike other photoconductors, this target is unique in that its sensitivity can be increased to very high levels to cope with darker illumination. In addition, we have achieved high resolution over the entire picture through the use of a new all-electrostatic focusing and deflection system in the 18-mm-diameter tube that facilitates the use of a narrow electron beam while assuring the optimal suppression of aberration. a prototype hand-held HDTV camera equipped with three of these camera tubes has attained a maximum sensitivity of 2,000 lux at f/25 (normal gain) and a limiting resolution of more than 1,400 TV lines.

Paper Details

Date Published: 14 March 1995
PDF: 10 pages
Proc. SPIE 2416, Cameras and Systems for Electronic Photography and Scientific Imaging, (14 March 1995); doi: 10.1117/12.204831
Show Author Affiliations
Masakazu Nanba, NHK Science and Technical Research Labs. (Japan)
Yoshiro Takiguchi, NHK Science and Technical Research Labs. (Japan)
Toshio Yamagishi, NHK Science and Technical Research Labs. (Japan)
Misao Kubota, NHK Science and Technical Research Labs. (Japan)
Saburo Okazaki, NHK Science and Technical Research Labs. (Japan)
Tsutomu Kato, NHK Science and Technical Research Labs. (Japan)
Kenkichi Tanioka, NHK Science and Technical Research Labs. (Japan)
Tadaaki Hirai, Hitachi Device Engineering Ltd. (Japan)
Yukio Takasaki, Hitachi Ltd. (Japan)


Published in SPIE Proceedings Vol. 2416:
Cameras and Systems for Electronic Photography and Scientific Imaging
Constantine N. Anagnostopoulos; Michael P. Lesser, Editor(s)

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