Optical scanning apparatus

Details Optical scanning apparatus Optical scanning apparatus

1994-10-28

1995-08-01

Ben, Loha

Optical: systems and elements

Deflection using a moving element

Using a periodically moving element

359196, G02B 2608

Patent

active

054384508

ABSTRACT:
In an optical scanning apparatus, a light beam from a light source is deflected by a deflector and the deflected light beam is converged on a scanning surface by an optical system. The light beam from the optical system is reflected by a reflecting element such that the reflected light beam has an angle with respect to a main scanning surface. The reflected beam is detected. When a distance from a deflection point of the deflector to the scanning surface along a direction of an optical axis of the optical system is L, a distance from the deflection point to a lens surface of the optical system at a position closest to the scanning surface is A, and a maximum distance from the deflection point to the reflecting element is B, the condition 0<(B-A)/L<0.2 is satisfied.

REFERENCES:
patent: 4383755 (1983-05-01), Fedder et al.
patent: 4758059 (1988-07-01), Sakuma
patent: 4978977 (1990-12-01), Ohmori et al.
patent: 5044710 (1991-09-01), Iwai et al.
patent: 5064262 (1991-11-01), Matsumoto et al.

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