F. .theta. lens for optical scanning system

Details F. .theta. lens for optical scanning system F. .theta. lens for optical scanning system

1996-08-08

1997-10-28

Phan, James

Optical: systems and elements

Deflection using a moving element

Using a periodically moving element

359216, G02B 2608

Patent

active

056822588

ABSTRACT:
An f.multidot..theta. lens for an optical scanning system is comprised of four lens elements, arranged in order from the object end to the image end: a first meniscus element of positive power having a concave object side surface, a second element of negative power having a concave object side surface, a third element of positive power having a convex image side surface and a fourth element.

REFERENCES:
patent: 5018807 (1991-05-01), Shirota

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