Image reader with a light diffuser

Details Image reader with a light diffuser Image reader with a light diffuser

1984-09-12

1985-05-21

Westin, Edward P.

Radiant energy

Photocells; circuits and apparatus

Optical or pre-photocell system

358212, H04N 530

Patent

active

045188645

ABSTRACT:
An image reader in which sensitivity fluctuations of a solid-state image pickup device are eliminated. The imaging rays of a picture to be read are applied with diffusion to the surface of the solid-state image pickup device. The diffusion may be supplied by the use of a diffused light source such as a fluorescent lamp, a number of spot light sources, or a tungsten light source with a diffusing plate. Otherwise, the incident light can be diffused immediately adjacent the surface of the solid-state image pickup device with a light-diffusing plate.

REFERENCES:
patent: 3645626 (1972-02-01), Druschel
patent: 4065788 (1977-12-01), Meier et al.

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