Optical scanner

Details Optical scanner Optical scanner

1996-12-23

1998-12-15

Phan, James

Optical: systems and elements

Deflection using a moving element

Using a periodically moving element

359206, 359216, 347242, 347243, 347244, G02B 2608

Patent

active

058503064

ABSTRACT:
An optical scanner includes an optical deflector having a plurality of reflecting surfaces to deflect laser beams emitted from light sources, an f .theta. lens to through which the laser beams pass for correcting fluctuation of laser beams caused by the plural uneven reflecting surfaces of the optical deflector, a first mirror provided at a first side to the optical axis of the f .theta. lens to reflect laser beams passed through the f .theta. lens, and a second mirror provided at a second side opposite to the first side to the optical axis of the f .theta. lens to reflect the laser beams reflected by the first mirror and lead the laser beams to photosensitive drums arranged at the second side. Further, the optical scanner includes a fixing member provided at the first side to hold the f .theta. lens and a presser blade spring provided at a position closer to the optical axis of the f .theta. lens than the second mirror at the second side to press the f .theta. lens against the fixing member.

REFERENCES:
patent: 4731623 (1988-03-01), Oda et al.
patent: 5181137 (1993-01-01), Koide

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