Optical device

Details Optical device Optical device

2006-04-18

2006-04-18

Sugarman, Scott J. (Department: 2873)

Optical: systems and elements

Lens

With variable magnification

C359S683000

Reexamination Certificate

active

07031071

ABSTRACT:
An optical apparatus includes an optical system for performing variable power by one lens group or integrated lens groups; a variable optical-characteristic element; a drive circuit for driving the variable optical-characteristic element; and a picture element, wherein the apparatus is constructed by providing a predetermined resolution chart with a known distance, feeding drive information to the variable optical-characteristic element in accordance with the distance, photographing images of the resolution chart, and adjusting and fixing the position of the picture element so as to substantially maximize the contrast of the images.

REFERENCES:
patent: 5585940 (1996-12-01), Seto
patent: 5828501 (1998-10-01), Menard et al.
patent: 6452145 (2002-09-01), Graves et al.
patent: 6464363 (2002-10-01), Nishioka et al.
patent: 2001-004809 (2001-01-01), None

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