Aspherical reflector and light beam scanning optical system usin

Details Aspherical reflector and light beam scanning optical system usin Aspherical reflector and light beam scanning optical system usin

1995-11-21

1998-09-22

Phan, James

Optical: systems and elements

Deflection using a moving element

Using a periodically moving element

359205, 359216, 359853, G02B 2608

Patent

active

058122982

ABSTRACT:
The reflecting surface of an aspherical reflector assumes, in the main scanning plane, a curve represented by Z(Y)=AY.sup.2 +BY.sup.4 +CY.sup.6 +DY.sup.8 +EY.sup.10 where Z is the coordinate along the optical axis, Y is the coordinate in the direction that is perpendicular to the optical axis and is included in the main scanning plane, and A to E are coefficients satisfying A.times.C>0. The reflecting surface assumes, in any of auxiliary scanning planes arranged in the main scanning direction, a circular arc that establishes a conjugate relationship in geometrical optics between the deflecting face of a deflector and the scanning surface.

REFERENCES:
patent: 4941719 (1990-07-01), Hisada et al.
patent: 5233454 (1993-08-01), Sakuma et al.
patent: 5373390 (1994-12-01), Sakuma
patent: 5475522 (1995-12-01), Itabashi et al.
patent: 5557448 (1996-09-01), Endo et al.
patent: 5583559 (1996-12-01), Nakamura et al.
patent: 5684618 (1997-11-01), Atsuumi

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