Achromatic telecentric f-theta scan lens optical system with imp

Details Achromatic telecentric f-theta scan lens optical system with imp Achromatic telecentric f-theta scan lens optical system with imp

1996-05-02

1998-11-17

Spyrou, Cassandra C.

Optical: systems and elements

Deflection using a moving element

Using a periodically moving element

359205, 359206, 359662, G02B 2608

Patent

active

058384812

ABSTRACT:
An achromatic, telecentric f-theta scan lens optical system for a raster output scanner has a positive crown glass lens element, a negative flint lens element and a concave mirror. The refractive indices of the positive crown glass lens element and the negative flint lens element are sufficiently different to achieve achromatization of a light beam by the two lens elements. The positive crown glass lens element, the negative flint lens element and the concave mirror form a telecentric optical system.

REFERENCES:
patent: 4396254 (1983-08-01), Shibuya
patent: 4863250 (1989-09-01), Ishizuka
patent: 5404247 (1995-04-01), Cobb et al.

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