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Proceedings Paper

Beam characteristics and a new operation method of a HARP field-emitter image sensor
Author(s): Masakazu Nanba; Toshio Yamagishi; Saburo Okazaki; Kenkichi Tanioka; Katsumi Takayama; Mitsuru Tanaka; Shigeo Itoh
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Paper Abstract

A new type of image sensor featuring a unique structure is studied with the aim of achieving both super-high sensitivity and ultrahigh-definition. This image sensor combines a field emitter array (FEA) and a high-gain avalanche rushing amorphous photoconductor target. We investigated the conditions for improving resolution in a vacuum chamber by inserting a mesh electrode between the FEA and the target. The results indicate that the resolution can be improved by strengthening the accelerating electric field between the FEA gate and the mesh, and by placing the mesh closer to the FEA. We also propose a new parallel readout system that is suitable for an ultrahigh-definition image sensor. Dividing the target into multiple segments and reading out signals for each segment simultaneously enables us to decrease the drive frequency. In our first attempt, we synthesized a good 60 X 60 pixel image from two 30 X 60 pixel segments.

Paper Details

Date Published: 27 April 1999
PDF: 9 pages
Proc. SPIE 3649, Sensors, Cameras, and Systems for Scientific/Industrial Applications, (27 April 1999); doi: 10.1117/12.347085
Show Author Affiliations
Masakazu Nanba, NHK Science and Technical Research Labs. (Japan)
Toshio Yamagishi, NHK Science and Technical Research Labs. (Japan)
Saburo Okazaki, NHK Science and Technical Research Labs. (Japan)
Kenkichi Tanioka, NHK Science and Technical Research Labs. (Japan)
Katsumi Takayama, Futaba Corp. (Japan)
Mitsuru Tanaka, Futaba Corp. (Japan)
Shigeo Itoh, Futaba Corp. (Japan)


Published in SPIE Proceedings Vol. 3649:
Sensors, Cameras, and Systems for Scientific/Industrial Applications
Morley M. Blouke; George M. Williams, Editor(s)

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