Scanning optical system for formation of a half tone image

Details Scanning optical system for formation of a half tone image Scanning optical system for formation of a half tone image

1979-05-29

1981-05-19

Orsino, Jr., Joseph A.

Facsimile and static presentation processing

Facsimile

Recording apparatus

358235, H04N 122

Patent

active

042688710

ABSTRACT:
A scanning optical system having an optical system capable of controlling formation of a half tone image which is constructed with a light source, a first aperture which restricts a light beam of the light source, an image focusing optical system provided at the opposite side of the light source relative to the first aperture, a second aperture provided at an optically conjugative position with the first aperture with respect to the image forming optical system, a deflector composed of a crystal interposed between the first aperture and the second aperture, a collimator lens which collimates the light beam from the second aperture, and a scanning device which scans the light beam from the collimator lens in a certain definite direction.

REFERENCES:
patent: 2158990 (1939-05-01), Von Okolicsanyi
patent: 2797619 (1957-07-01), Rosenthal
patent: 2818465 (1957-12-01), Brink
patent: 3329474 (1967-07-01), Harris et al.

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