Deflection scanning optical system with reflecting sections

Details Deflection scanning optical system with reflecting sections Deflection scanning optical system with reflecting sections

1988-04-04

1989-04-18

Nelms, David C.

Radiant energy

Photocells; circuits and apparatus

Optical or pre-photocell system

250236, 350 68, 346108, H01J 314, G02B 2608

Patent

active

048230022

ABSTRACT:
In a deflection scanning optical system, a single first mirror is arranged between a laser beam source and a surface to be scanned. The first mirror has a first reflecting section, a second reflecting section and a transparent section. The laser beam from the laser beam source is reflected by the first reflecting section. A second mirror is provided for reflecting the laser beam reflected by the first reflecting section, toward the second reflecting section. The second mirror also reflects the laser beam reflected by the first reflecting section to transmit the reflected laser beam through the transparent section, thereby directing the transmitted laser beam toward the surface to be scanned. A detector received the laser beam reflected by the second mirror toward the second reflecting section and reflected by the same, for detecting a scanning position of the laser beam with respect to the surface to be scanned.

REFERENCES:
patent: 3970359 (1976-07-01), Starkweather
patent: 4130339 (1978-12-01), Kawamura et al.
patent: 4612555 (1986-09-01), Hongou et al.
patent: 4613877 (1986-09-01), Spencer et al.
patent: 4704698 (1987-11-01), Reiniger
patent: 4762994 (1988-08-01), Byerly et al.

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