Optical: systems and elements – Lens – Reverse telephoto
Reexamination Certificate
2007-02-20
2007-02-20
Lester, Evelyn A. (Department: 2873)
Optical: systems and elements
Lens
Reverse telephoto
C359S749000, C359S740000, C359S771000, C359S781000, C359S782000, C359S798000
Reexamination Certificate
active
11372041
ABSTRACT:
An image pickup unit which consists of an objective optical system and a solid-state image pickup device: the objective optical system being composed of a first negative lens unit comprising a first meniscus lens element having a convex surface on the object side and negative power, a second positive lens unit comprising a convex lens element and an aperture stop disposed between the first lens unit and the second lens unit and this image pickup unit having a small outside diameter, allowing a field angle to be changed little due to variations of parts and an assembling variation, and having a maximum field angle of 150° or larger.
REFERENCES:
patent: 4403837 (1983-09-01), Nakahashi
patent: 4764001 (1988-08-01), Yokota
patent: 5198931 (1993-03-01), Igarashi
patent: 5436767 (1995-07-01), Suzuki et al.
patent: 5808808 (1998-09-01), Yamanashi
patent: 5828498 (1998-10-01), Sekiya et al.
patent: 5844729 (1998-12-01), Shimizu
patent: 5999327 (1999-12-01), Nagaoka
patent: 6016229 (2000-01-01), Suzuki
patent: 6582362 (2003-06-01), Konno
patent: 2002/0057505 (2002-05-01), Sato
patent: 2003/0103275 (2003-06-01), Sato
patent: 03-200911 (1991-09-01), None
patent: 04-275514 (1992-10-01), None
patent: 10-039206 (1998-02-01), None
patent: 2002-072085 (2002-03-01), None
patent: 2002-328299 (2002-11-01), None
LandOfFree
Image pickup unit for endoscope does not yet have a rating. At this time, there are no reviews or comments for this patent.
If you have personal experience with Image pickup unit for endoscope, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Image pickup unit for endoscope will most certainly appreciate the feedback.
Profile ID: LFUS-PAI-O-3856285