Optical: systems and elements – Lens – With variable magnification
Patent
1996-10-30
1998-09-15
Epps, Georgia Y.
Optical: systems and elements
Lens
With variable magnification
359823, 348 65, G02B 1514, G02B 702, A62B 104
Patent
active
058088130
ABSTRACT:
A variable-focus variable-magnification optical coupler is provided, for coupling an endoscope to a variety of different cameras having image planes at different positions while maintaining "true-zoom" functioning of the optical coupler. By "true-zoom", it is meant that the focal length of the optical coupler's lens system can be varied without having the image out of focus. That is, once an image is focussed with the optical coupler, the image remains in focus even when the size of the image is changed by a zoom lens of the coupler. In one embodiment, the optical coupler includes an adjustment mechanism which is actuated to move a focus lens and a zoom lens assembly together along the length of the coupler relative to a camera mount. In another embodiment, an adjustment mechanism moves a back focal lens is moved relative to the camera mount to account for the different image plane of the camera.
REFERENCES:
patent: 3819267 (1974-06-01), Kawahara
patent: 4611888 (1986-09-01), Prenovitz et al.
patent: 4639772 (1987-01-01), Sluyter et al.
patent: 4781448 (1988-11-01), Chatenever et al.
patent: 4874232 (1989-10-01), Hasegawa
patent: 4947245 (1990-08-01), Ogawa et al.
patent: 4969450 (1990-11-01), Chinnock et al.
patent: 5245475 (1993-09-01), Takasugi
patent: 5394209 (1995-02-01), Stiepel et al.
patent: 5418645 (1995-05-01), Coath et al.
patent: 5496261 (1996-03-01), Sander
Kazakevich Yuri
Lucey Paul
Epps Georgia Y.
Mack Ricky
Smith & Nephew Inc.
LandOfFree
Optical coupler does not yet have a rating. At this time, there are no reviews or comments for this patent.
If you have personal experience with Optical coupler, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Optical coupler will most certainly appreciate the feedback.
Profile ID: LFUS-PAI-O-94406