Four-group endoscope objective lens

Details Four-group endoscope objective lens Four-group endoscope objective lens

2006-02-07

2006-02-07

Leubecker, John P. (Department: 3739)

Surgery

Endoscope

Having imaging and illumination means

C359S783000, C359S660000

Reexamination Certificate

active

06994668

ABSTRACT:
A four-group endoscope objective lens includes, in order from the object side, a first lens group of negative refractive power, a second lens group of positive refractive power, a diaphragm, and third and fourth lens groups of positive refractive power. The second and fourth lens groups each include a lens component that includes two lens elements. Some lens elements of the first, third, and fourth lens groups have particular shapes or refractive powers. The endoscope objective lens may include only six lens elements and satisfy certain specified conditions.

REFERENCES:
patent: 5515208 (1996-05-01), Yamamoto et al.
patent: 5587839 (1996-12-01), Miyano et al.
patent: 5777797 (1998-07-01), Miyano
patent: 5916148 (1999-06-01), Tsuyuki
patent: 5936778 (1999-08-01), Miyano et al.
patent: 63-261213 (1988-10-01), None
patent: 2002-218696 (2002-08-01), None

Affiliated with

Also associated with

Rating

Four-group endoscope objective lens does not yet have a rating. At this time, there are no reviews or comments for this patent.

If you have personal experience with Four-group endoscope objective lens, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Four-group endoscope objective lens will most certainly appreciate the feedback.

Rate now

Comments { 0 }

Profile ID: LFUS-PAI-O-3689942