Optical scanner using multiple half mirrors to combine multiple

Details Optical scanner using multiple half mirrors to combine multiple Optical scanner using multiple half mirrors to combine multiple

1998-12-09

2000-08-08

Spyrou, Cassandra

Optical: systems and elements

Deflection using a moving element

Using a periodically moving element

347241, 347243, G02B 2608

Patent

active

061010197

ABSTRACT:
The multi-beam optical unit of the invention limits the number of reflection times by half mirrors to one time or below when a plurality of beams are combined into one and guided to a polygon mirror, so that an influence upon an image due to a positioning error of the half mirrors can be minimized. Besides, power of emitted beams can be made uniform by using the half mirrors having transmissivity and reflectance satisfying predetermined conditions regardless of the number of times that the beams penetrate the half mirrors. Thus, the service lives of a plurality of beam emitting sources can be made uniform, and maintainability can be improved.

REFERENCES:
patent: 5251055 (1993-10-01), Koide
patent: 5625403 (1997-04-01), Hazman
patent: 5751462 (1998-05-01), Shiraishi et al.

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