Radiation beam scanning apparatus and method employing distortio

Details Radiation beam scanning apparatus and method employing distortio Radiation beam scanning apparatus and method employing distortio

1997-12-02

1999-05-25

Westin, Edward P.

Radiant energy

Photocells; circuits and apparatus

Optical or pre-photocell system

359197, G02B 2600

Patent

active

059071532

ABSTRACT:
Radiation beam scanning apparatus comprises a rotatable reflector for causing an incident radiation beam to undergo a scanning movement; and a compensating device on to which the radiation beam impinges before reaching the rotating reflector. The compensating device modifies the optical path of circumferentially spaced portions of the beam upstream of the reflector, in phase with the rotation of the reflector, so as to compensate for distortions in the reflected beam introduced by the reflector.

REFERENCES:
patent: 5281812 (1994-01-01), Lee et al.
patent: 5461601 (1995-10-01), Shinada et al.
patent: 5505807 (1996-04-01), Min et al.
patent: 5532730 (1996-07-01), Akanabe

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