Capsule endoscope

Details Capsule endoscope Capsule endoscope

2005-09-06

2005-09-06

Leubecker, John P. (Department: 3739)

Surgery

Endoscope

Having imaging and illumination means

C600S160000, C600S167000

Reexamination Certificate

active

06939295

ABSTRACT:
A capsule endoscope is disclosed having an illumination means, an imaging system that includes an objective optical system, and a transparent cover. The invention is characterized by one of: (1) the transparent cover has a larger radius of curvature in a central region of the field of view of the objective optical system than the radius of curvature of the transparent cover in a peripheral region of the field of view of the objective optical system, or (2) the imaging system has a different near point of focus distance for a central region of the field of view than the near point of focus distance of a region that is peripheral to the central region of the field of view and the objective optical system includes a meniscus lens element of positive refractive power and a plano-convex lens element.

REFERENCES:
patent: 4864137 (1989-09-01), Klein
patent: 4932764 (1990-06-01), Simpson, Jr.
patent: 6038079 (2000-03-01), Michaels
patent: 6134056 (2000-10-01), Nakamuka
patent: 2003/0158503 (2003-08-01), Matsumoto
patent: 2001-91860 (2001-04-01), None
patent: WO 00/76391 (2000-12-01), None

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