Optical scanning apparatus

Details Optical scanning apparatus Optical scanning apparatus

1995-11-30

1998-05-05

Dzierzynski, Paul M.

Optical: systems and elements

Deflection using a moving element

Using a periodically moving element

359196, 359206, 359216, 347259, G02B 2608

Patent

active

057483566

ABSTRACT:
An optical scanning apparatus has an F-.theta. function with one aspherical lens having a toric configuration that compensates for the vibration of a rotating polygon mirror. The optical scanning apparatus includes a laser diode as the source of light, a collimator lens, a compound prism, a rotating polygon mirror, and a scanning lens system. The compound prism is located between the rotating polygon mirror and the laser diode so that the laser diode and an optical axis form a right angle. The scanning lens is composed of one lens with magnification in mainscanning/subscanning directions. With such a construction, by providing an F-.theta. function and compensating for the vigration of the rotating polygon mirror, the number of lenses is mnimized, the manufacture and assembly/adjustment of the lens are simplified, and the number of manufacturing steps can be reduced.

REFERENCES:
patent: 4770507 (1988-09-01), Arimoto et al.
patent: 4962982 (1990-10-01), Takanashi

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