Self-resonant galvanometer scanning system with evacuated chambe

Details Self-resonant galvanometer scanning system with evacuated chambe Self-resonant galvanometer scanning system with evacuated chambe

1989-11-02

1991-02-12

Nelms, David C.

Radiant energy

Photocells; circuits and apparatus

Optical or pre-photocell system

350 66, H01T 314, G02B 2608

Patent

active

049926551

ABSTRACT:
A very stable deflection system usable with a beam of radiant energy incorporates a self-resonant scanning galvanometer located within an evacuated chamber. The chamber has a hermetic radiant energy transmissive window. An exterior laser source provides a beam of monochromatic light which is directed onto the mirror of the galvanometer. Repetitive deflection of the galvanometer mirror at a predetermined frequency results in the beam being projected onto a target so as to form a very stable and repeatable scanning line. Movement of the target provides a multi-line raster on which an image can be formed.

REFERENCES:
patent: 4349843 (1982-09-01), Laakmann et al.
patent: 4367912 (1983-01-01), Kitamura
patent: 4370019 (1983-01-01), Shiraski
patent: 4690550 (1987-09-01), Kuhno
patent: 4717223 (1988-01-01), Ishida et al.
patent: 4803367 (1989-02-01), Murase et al.
patent: 4877955 (1989-10-01), Ono

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