Facsimile and static presentation processing – Facsimile – Specific signal processing circuitry
Patent
1976-10-14
1977-10-18
Henry, Jon W.
Facsimile and static presentation processing
Facsimile
Specific signal processing circuitry
358206, G02B 2717
Patent
active
040543617
ABSTRACT:
A beam scanning device comprises a rotating multi-face mirror, a single optical element having major and minor axes of different focal length and an image forming optical system. A beam of collimated light is passed through or reflected by the single optical element a first time to form a line image on the rotating multi-face mirror. The reflected beam of light issuing from the line image is passed through or reflected by the single optical element a second time and the resulting collimated beam is passed through the image forming optical system to form a light spot on the image plane. As the rotating multi-face mirror is rotated, the light spot successively scans the image plane without any displacement of the scanning lines resulting from error in parallelism of the rotating multi-face mirror.
REFERENCES:
patent: 3087987 (1963-04-01), Stone
patent: 3750189 (1973-07-01), Fleischer
patent: 3771850 (1973-11-01), Casler
patent: 3865465 (1975-02-01), Tatuoka et al.
patent: 3873180 (1975-03-01), Bousky
patent: 3897132 (1975-07-01), Meeussen et al.
patent: 3972582 (1976-08-01), Oosaka et al.
patent: 3972583 (1976-08-01), Lobb
Baker Joseph J.
Ferguson Jr. Gerald J.
Fuji Photo Film Co. , Ltd.
Henry Jon W.
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