Fiber optic scanning beam detector

Details Fiber optic scanning beam detector Fiber optic scanning beam detector

1994-12-09

1996-04-16

Westin, Edward P.

Radiant energy

Photocells; circuits and apparatus

Optical or pre-photocell system

250236, 358484, H01J 314, G02B 2610

Patent

active

055085130

ABSTRACT:
A fiber optic system is used in a laser ROS scanning system to generate a start of scan signal. In one embodiment, a single optical fiber is positioned at the beginning of a scan line sweep. The fiber transmits a portion of a scan beam energy, directed non-axially into the fiber entrance to a photosensor. The photosensor generates an output response which is processed to initiate the SOS signal. The fiber entrance face is formed so that the beam, entering non-axially, is either reflected internally along the fiber axis or first refracted and then reflected along the fiber axis. Dual fiber embodiments are also presented which detect and transmit non-axially incident scanning beams.

REFERENCES:
patent: 4071754 (1978-01-01), Roulund
patent: 4386272 (1983-05-01), Check, Jr. et al.
patent: 4500204 (1985-02-01), Ogura
patent: 4638156 (1987-01-01), Horikawa et al.
patent: 4952022 (1990-08-01), Genovese
patent: 5245181 (1993-09-01), Cho

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