Patent
1977-02-14
1977-11-22
Clark, Conrad J.
350255, G02B 1304
Patent
active
040593444
ABSTRACT:
A retrofocus-type objective for endoscopes comprising a front diverging lens group and rear converging lens group, said rear lens group being divided into a first lens group and second lens group, said retrofocus-type objective being arranged to be focused by varying the airspace between said first and second lens groups. By the above arrangement, the front lens is kept fixed and serves also as a cover glass so that the retrofocus-type objective as a whole becomes small in size.
REFERENCES:
patent: 3473866 (1969-10-01), Kirchhoff
Clark Conrad J.
Olympus Optical Co,. Ltd.
LandOfFree
Retrofocus-type objective 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 Retrofocus-type objective for endoscopes, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Retrofocus-type objective for endoscopes will most certainly appreciate the feedback.
Profile ID: LFUS-PAI-O-2256290