Optical system for scanning device

Details Optical system for scanning device Optical system for scanning device

1990-10-29

1993-06-01

Ben, Loha

Optical: systems and elements

Lens

Multiple component lenses

359196, 359220, 250568, G02B 904

Patent

active

052165507

ABSTRACT:
A temperature-compensated optical system for a scanning device. The optical system includes a first optical element having a positive radius of curvature in a plane and a second optical element having a negative radius of curvature in the plane. Both optical elements focus light energy to nearly the same point within a housing of the scanning device. The focal point is on the side of the second optical element that is opposite to the first optical element. In one embodiment, the optical system can be two separate optical elements and, in another embodiment, the optical system can be an integral piece of material, such as plastic, with the first and second optical elements being surfaces on opposite sides of the integral piece.

REFERENCES:
patent: 3817604 (1974-06-01), Watt
patent: 3961838 (1976-06-01), Zanoni
patent: 4916318 (1990-04-01), Iima
patent: 4919502 (1990-04-01), Yamakawa
patent: 4930850 (1990-06-01), Morimoto

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