Objective lens

Details Objective lens Objective lens

2007-02-06

2007-02-06

Sugarman, Scott J. (Department: 2873)

Optical: systems and elements

Lens

Including a nonspherical surface

C359S784000

Reexamination Certificate

active

11080934

ABSTRACT:
The compact imaging assembly has an electronic imager and an objective lens with a focal length fo. The objective lens receives light and forms an image of the object on the imager's image plane. The image plane has a maximum effective dimension DI. The objective lens has a first lens group comprising two to three elements with an object surface facing the object and an image surface facing an image plane. The objective lens also has a middle lens element with a concave object surface that is facing the lens group image surface, and a final lens element that has a positive power. The distance from the lens group object surface to the image plane is TT. The lens group, the middle lens and the final lens elements are coaxially aligned and on an optical axis normal to the image plane.

REFERENCES:
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patent: 6728047 (2004-04-01), Sato et al.
patent: 6836382 (2004-12-01), Ning
patent: 6985306 (2006-01-01), Abe
patent: 6985307 (2006-01-01), Do
patent: 6989947 (2006-01-01), Do
patent: 2006/0056042 (2006-03-01), Kim et al.
patent: 58033211 (1983-02-01), None

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