Reading optical system

Details Reading optical system Reading optical system

1984-03-26

1987-02-17

Nelms, David C.

Radiant energy

Photocells; circuits and apparatus

Optical or pre-photocell system

235473, H01J 516

Patent

active

046441557

ABSTRACT:
A reading optical system comprises a transparent block a part of whose bottom surface is an inclined surface forming an angle with respect to the horizontal plane, combined light-guides embedded in the block and having one end thereof all disposed on the intermediate portion of the inclined surface spaced apart by a predetermined distance from the lower end of the inclined surface and the other end extending on the upper surface of the block, a light sensor installed on the upper surface of the block in opposed relationship with the other end of the combined light-guides, and an illuminating system for illuminating the vicinity of the surface of an original opposed to the one end of the combined light-guides, through the block.

REFERENCES:
patent: 1886189 (1932-10-01), Hough
patent: 4052594 (1977-10-01), Davis
patent: 4232219 (1980-10-01), Yamamoto

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