Double beam scan type optical apparatus

Details Double beam scan type optical apparatus Double beam scan type optical apparatus

1991-03-13

1992-08-18

Howell, Janice A.

Radiant energy

Photocells; circuits and apparatus

Optical or pre-photocell system

346108, H01J 314

Patent

active

051401576

ABSTRACT:
A double beam scan type optical apparatus for use in a laser printer or the like. Such apparatus comprises two light sources and a lens system which provide scanning means for scanning a surface with parallel output light beams of the two light sources and beam distance controlling means for controlling the distance between the light beams. The reliability of the invention is improved by monitoring the intensity of the beams. Beam intensity checking means provide signals to verify that the intensity of each beam is maintained equal thus assuring that no abnormal conditions exist with the light sources or the lens system of the apparatus.

REFERENCES:
patent: 4725855 (1988-02-01), Arimoto et al.
patent: 4760407 (1988-07-01), Arimoto et al.
patent: 4768043 (1988-08-01), Saito et al.
patent: 4908634 (1990-03-01), Arimoto et al.
patent: 5006705 (1991-04-01), Saito et al.
patent: 5053619 (1991-10-01), Arimoto
"Ohyou Hikari Erekutoronikusu (Opto-Electronics Applications) Handbook", Apr. 1989 (no translation readily available).

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