High speed and high precisioin image scanning apparatus

Details High speed and high precisioin image scanning apparatus High speed and high precisioin image scanning apparatus

1996-07-19

1998-05-12

Westin, Edward P.

Radiant energy

Photocells; circuits and apparatus

Optical or pre-photocell system

250226, 358496, H01J 4014

Patent

active

057509859

ABSTRACT:
The invention is to realize an image scanning apparatus capable of achieving both high precision and high-speed scanning properties while maintaining and pursuing size and cost reductions of the apparatus. For this purpose, an image scanning apparatus having an imaging optical system for forming at least part of imaging light of an object into an image, an image sensor for performing photoelectric conversion of an optical image formed by the imaging optical system, and a moving unit for moving the optical image and the image sensor relative to each other, wherein the image sensor includes a plurality of photoelectric conversion units arranged adjacent to each other, a charge transfer unit for transferring charges generated by the plurality of photoelectric conversion units, and a charge adding unit for adding the charges transferred by the charge transfer unit, is disclosed. The image scanning apparatus includes a control unit for performing control such that the charge transfer unit transfers the charges substantially in synchronism with optical image movement by the moving unit, and the charge adding unit adds the charges from different photoelectric conversion units in accordance with a transfer operation of the charge transfer unit.

REFERENCES:
patent: 4234789 (1980-11-01), Fournet
patent: 4676623 (1987-06-01), Akashi et al.
patent: 4800258 (1989-01-01), Suzuki et al.
patent: 5182658 (1993-01-01), Ishizaki et al.
patent: 5426290 (1995-06-01), Kawomoto

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