Imaging lens and illumination system

Details Imaging lens and illumination system Imaging lens and illumination system

2006-05-23

2006-05-23

Winakur, Eric F. (Department: 3735)

Optics: eye examining, vision testing and correcting

Eye examining or testing instrument

Objective type

C351S205000, C351S207000, C351S221000, C351S246000, C600S473000, C600S476000

Reexamination Certificate

active

07048379

ABSTRACT:
An imaging system and method for imaging an object, where an objective lens directs light to the object, a coupling lens receives light reflected from a surface of the object and transmitted through the objective lens, and focuses the reflected light as an image of the object, and an annular light emitter arranged concentrically with an optical axis of the objective lens and the coupling lens emits to the objective lens the light directed to the object.

REFERENCES:
patent: 3700858 (1972-10-01), Murthy
patent: 3850527 (1974-11-01), Winthrop et al.
patent: 4247176 (1981-01-01), Ito
patent: 4660945 (1987-04-01), Trachtman
patent: 4859051 (1989-08-01), Fukuma et al.
patent: 5752767 (1998-05-01), Muehlemann
patent: 2005/0018136 (2005-01-01), Hayashi

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