Condenser optical system for light scanning system

Details Condenser optical system for light scanning system Condenser optical system for light scanning system

1996-02-12

1997-09-30

Dzierzynski, Paul M.

Optical: systems and elements

Deflection using a moving element

Using a periodically moving element

359207, 359208, 359662, 347259, G02B 2610

Patent

active

056731370

ABSTRACT:
In a condenser optical system for a light scanning system, a single lens focuses a light beam deflected by a reflecting surface of a deflector onto a surface to be scanned and causes the deflected light to scan the surface in a main scanning direction at a constant speed. A cylindrical mirror which has a refracting power only in a sub-scanning direction normal to the main scanning direction compensates for surface tilt of the reflecting surface. At least one surface of the single lens is toric to compensate for the surface tilt associated with the cylindrical mirror and the toric surface is aspheric in a main-scanning cross-section.

REFERENCES:
patent: 4847492 (1989-07-01), Houki

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