Beam scanning device

Details Beam scanning device Beam scanning device

1979-06-04

1981-04-28

Corbin, John K.

Photocopying

Contact printing

Light boxes

355 10, 358199, 358293, G02B 2717

Patent

active

042641209

ABSTRACT:
A beam scanning device provided with a beam generator to generate beam, a deflector to deflect the beam, and a beam detector to detect the deflected beam. In this beam scanning device, while the beam detector is detecting the beam with a definite cycle, the beam generator is so controlled that the beam may be generated therefrom with such definite cycle, and the beam is constantly generated from the beam generator when the beam detector becomes unable to detect the beam with such definite cycle. By thus controlling the beam generation, the beam detection can be carried out rapidly, even when the cycle for the beam detection shifts or noises enter during the beam detection.

REFERENCES:
patent: 3666363 (1972-05-01), Tanaka et al.
patent: 3893079 (1975-07-01), Shepard et al.
patent: 3922485 (1975-11-01), Starkweather et al.
patent: 4059833 (1978-04-01), Tanaka et al.
patent: 4071361 (1978-01-01), Marushima

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