Endoscope with decreased stray light effect that includes a...

Surgery – Endoscope – With particular distal tip configuration

Reexamination Certificate

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Details

C600S109000, C600S160000, C600S176000, C600S177000

Reexamination Certificate

active

07931587

ABSTRACT:
An endoscope includes an illuminator that includes a light emitting surface for illuminating the inside of a living body, an objective optical system for forming an image of a specified object on one side of the objective optical system and illuminated by the illuminator, and a transparent cover that encompasses the illuminator and the one side of the objective optical system. The transparent cover includes an outer surface, and light emitted from the light emitting surface that is reflected by the outer surface satisfies a certain condition that helps prevent rearward dispersed light caused by scratches on, or substances adhering to, the external surface of the transparent cover from entering the entrance pupil of the objective optical system. The endoscope may also include a member for partially shielding the light emitted from the light emitting surface so as to limit the direction in which light is directed from said light emitting surface to the transparent cover.

REFERENCES:
patent: 6240312 (2001-05-01), Alfano et al.
patent: 6836377 (2004-12-01), Kislev et al.
patent: 2002/0109774 (2002-08-01), Meron et al.
patent: 2003/0028078 (2003-02-01), Glukhovsky
patent: 2003/0130562 (2003-07-01), Barbato et al.
patent: 2003/0171652 (2003-09-01), Yokoi et al.
patent: 2004/0225190 (2004-11-01), Kimoto et al.
patent: 2005/0043586 (2005-02-01), Suzushima
patent: 2006/0030752 (2006-02-01), Orihara
patent: 2001-91860 (2001-04-01), None
patent: WO 01/65995 (2001-09-01), None

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