Optical system for light beam scanning

Details Optical system for light beam scanning Optical system for light beam scanning

1992-07-16

1993-01-12

Sugarman, Scott J.

Optical: systems and elements

Deflection using a moving element

Using a periodically moving element

359206, 359216, 359711, G02B 2608, G02B 2610

Patent

active

051794659

ABSTRACT:
A scanning optical system used for light beam scanning device is disclosed. The scanning optical system is disposed between a deflector for deflecting a light beam and a plane to be scanned. In the scanning optical system, a spherical lens having a positive power and a toric lens are arrnaged. The toric lens is positioned close to the spherical lens at the side thereof closer to the plane to be scanned. The toric lens has positive powers both in the main and sub scanning cross sectional planes. At least one of the faces of the toric lens is aspherical in the main scanning cross sectional plane.

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