Objective optical system for endoscopes

Details Objective optical system for endoscopes Objective optical system for endoscopes

2009-05-29

2010-06-15

Lester, Evelyn A. (Department: 2873)

Optical: systems and elements

Lens

Microscope objective

C359S661000, C359S726000, C359S740000, C359S741000, C359S798000, C359S810000, C396S017000, C348S045000, C348S065000

Reexamination Certificate

active

07738180

ABSTRACT:
An objective optical system for endoscopes has, in order form the object side, a single lens with negative power, a cemented lens with positive power, and an image sensor unit. The cemented lens has a plano-convex lens, located at the image-side end, with a convex surface facing the image side and an aperture stop placed proximate to a cemented portion and the image sensor unit includes an optically cemented body of at least one optical part, a path bending prism, and a solid-state image sensor to satisfy the following conditions:in-line-formulae description="In-line Formulae" end="lead"?1.5<TB/f<3.5in-line-formulae description="In-line Formulae" end="tail"?in-line-formulae description="In-line Formulae" end="lead"?2.4<TC/f<4in-line-formulae description="In-line Formulae" end="tail"?where f is the focal length of the whole of the objective optical system, TBis the optical path length of the cemented lens, and TCis the optical path length of the image sensor unit.

REFERENCES:
patent: 4916534 (1990-04-01), Takhashi et al.
patent: 4986642 (1991-01-01), Yokota et al.
patent: 7085064 (2006-08-01), Uzawa et al.
patent: 2005/0288557 (2005-12-01), Yokoi et al.
patent: 2008/0252997 (2008-10-01), Duckett
patent: S60-026918 (1985-02-01), None
patent: S61-254917 (1986-11-01), None
patent: H05-341185 (1993-12-01), None
patent: H07-318799 (1995-12-01), None
patent: H09-262207 (1997-10-01), None
patent: H09-325285 (1997-12-01), None
patent: H10-239594 (1998-09-01), None
patent: H11-352413 (1999-12-01), None

Affiliated with

Also associated with

Rating

Objective optical system for endoscopes does not yet have a rating. At this time, there are no reviews or comments for this patent.

If you have personal experience with Objective optical system for endoscopes, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Objective optical system for endoscopes will most certainly appreciate the feedback.

Rate now

Comments { 0 }

Profile ID: LFUS-PAI-O-4209978