Method and apparatus for generating a scanned optical output sig

Details Method and apparatus for generating a scanned optical output sig Method and apparatus for generating a scanned optical output sig

1981-05-28

1983-06-14

Orsino, Jr., Joseph A.

Facsimile and static presentation processing

Facsimile

Recording apparatus

350 68, H04N 308

Patent

active

043886515

ABSTRACT:
A system is disclosed for transforming a collimated beam of light, such as that generated by a laser, into a line scan or a raster image for projecting onto a screen or other object. The laser beam is directed at a rotating mirror having a plurality of facets disposed at equal circumferential intervals around the mirror axis of rotation. The light reflected from the rotating mirror generates a first scanned reflected output beam. A first reflecting surface is aligned to receive the first scanned reflected output beam and generates a second scanned reflected output beam. This second scanned reflected output beam passes through a first pivot vertex and is directed back onto the rotating mirror facets by a second reflecting surface to generate an angularly amplified output beam which scans a first plane. The angularly amplified output beam is directed through a second pivot vertex and is then deflected through a second plane which is oriented perpendicular to the first plane. The angularly amplified output beam which has been deflected through the first and second planes thereby projects a raster image on a screen.

REFERENCES:
patent: 2149198 (1939-02-01), Traub
patent: 2163548 (1939-06-01), Clothier et al.
patent: 3973826 (1976-08-01), Lobb
patent: 4030806 (1977-06-01), Goshima et al.
patent: 4230394 (1980-10-01), Bruggemann et al.

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