Radiant energy – Photocells; circuits and apparatus – Optical or pre-photocell system
Patent
1982-06-03
1985-05-07
Nelms, David C.
Radiant energy
Photocells; circuits and apparatus
Optical or pre-photocell system
350 66, H01J 516
Patent
active
045160236
ABSTRACT:
A laser beam scanner with encoder and a laser beam plotter with encoder are disclosed. The scanner provides for unsharp masking by alternating between a large scan beam and a small scan beam on alternate scans. Compensation for non-straight scan lines is achieved through a small linear galvonometer placed in the scanning optics. An equal conjugate optical system is utilized to allow encoder information to be obtained from a stationary image of the main scanning and plotting galvonometer mirror.
REFERENCES:
patent: 4352984 (1982-10-01), Ohara
patent: 4408826 (1983-10-01), Ike
Green Paul M.
Mason Mark T.
Morrill David R.
Brophy J. Jon
Klimsch/Optronics
Nelms David C.
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