Reflection-type scanning optical system

Details Reflection-type scanning optical system Reflection-type scanning optical system

1997-01-30

1998-05-05

Phan, James

Optical: systems and elements

Deflection using a moving element

Using a periodically moving element

359207, 359208, 359216, 359217, G02B 2608

Patent

active

057483540

ABSTRACT:
A reflection type scanning optical device includes a light source; a deflector for deflecting and scanning the light beam emitted from the light source; a first imaging optical system, between the light source and the deflector, that has a positive power in an auxiliary scanning direction for converging a light beam from the light source to form a linear image at the position between the deflector and the imaging surface; and a second imaging optical system that converges the light beam deflected by the deflector to form a beam spot on the imaging surface, the second imaging optical system including a curved surface mirror having a positive power mainly in a main scanning direction and an anamorphic lens having a positive power mainly in the auxiliary scanning direction, wherein the light beam from the deflector is reflected by the curved surface mirror and then passes the anamorphic lens.

REFERENCES:
patent: 5200850 (1993-04-01), Iizuka et al.
patent: 5546215 (1996-08-01), Ota
patent: 5557448 (1996-09-01), Endo et al.
patent: 5572353 (1996-11-01), Iizuka et al.
patent: 5604622 (1997-02-01), Iizuka et al.
patent: 5621562 (1997-04-01), Hama

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