Optical: systems and elements – Lens – Afocal
Patent
1996-01-05
2000-05-09
Nguyen, Thong
Optical: systems and elements
Lens
Afocal
359362, 359399, 351158, G02B 1300, G02B 2300
Patent
active
060611898
ABSTRACT:
A magnification viewer system includes a pair of magnification viewers adapted to be inserted into apertures in a pair of spectacle lenses to provide a relatively wider field of view and a lighter viewer system. Each magnification viewer includes a two-element objective lens and a single-element eyepiece lens. The doublet objective lens serves to reduce vignetting while providing a wide field of view and reduced chromatic aberration. Image quality may be further enhanced while keeping the weight of the viewer down through the use of light-weight high index glass for the objective lens. Moreover, the invention permits the use of interchangeable eyepiece lenses to provide a series of working distances, as well as interchangeable eyepiece segments to enable the magnification viewers to be corrected to the user's ophthalmic prescription. In order to reduce the criticality of the interpupillary distance, eyepiece lenses are formed with a 16 millimeter (mm) diameter.
REFERENCES:
patent: 1197742 (1916-09-01), Kellner
patent: 3273456 (1966-09-01), Feinbloom
patent: 4364645 (1982-12-01), Feinbloom
patent: 4498743 (1985-02-01), Feinbloom
patent: 4555164 (1985-11-01), Feinbloom
patent: 4621283 (1986-11-01), Feinbloom
patent: 4863468 (1989-09-01), Feinbloom et al.
patent: 4865438 (1989-09-01), Wada
patent: 4929075 (1990-05-01), Eliakim
patent: 5076682 (1991-12-01), Pasfield
patent: 5090796 (1992-02-01), Feinbloom
patent: 5129717 (1992-07-01), Feinbloom
patent: 5278695 (1994-01-01), Gebelein et al.
patent: 5291229 (1994-03-01), Feinbloom
patent: 5463500 (1995-10-01), Buchroeder
patent: 5627690 (1997-05-01), Caplan et al.
Buchroeder Richard A.
Caplan Charles Howard
Nguyen Thong
Surgical Acuity, Inc.
LandOfFree
Through-the-lens binocular viewer does not yet have a rating. At this time, there are no reviews or comments for this patent.
If you have personal experience with Through-the-lens binocular viewer, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Through-the-lens binocular viewer will most certainly appreciate the feedback.
Profile ID: LFUS-PAI-O-1070931