Infrared continuous zoom telescope using diffractive optics

Optical: systems and elements – Having significant infrared or ultraviolet property – Including continuously variable magnification or focal length

Patent

Rate now

  [ 0.00 ] – not rated yet Voters 0   Comments 0

Details

359357, 359565, G02B 1514, G02B 1314, G02B 2744

Patent

active

054934419

ABSTRACT:
An infrared continuous zoom telescope or afocal lens system using a diffractive surface for color correction. The lens system comprises an objective lens, an eyepiece lens, a plurality of lenses disposed between the objective lens and the eyepiece lens to provide the zoom function and a diffractive pattern disposed at a surface, preferably the interior surface and preferably integral therewith, of the objective lens to provide color correction at a predetermined wavelength of light passing through the objective lens. All of the lenses are preferably germanium. The diffractive pattern comprises a plurality of spaced ring-shaped steps, each ring concentric with the center of the objective lens and each step having a height equal to the predetermined wavelength for which the lens system is designed. The plurality of ring-shaped steps are formed in accordance with a known formula.

REFERENCES:
patent: 3947084 (1976-03-01), Noyes
patent: 4411488 (1983-10-01), Neil
patent: 4479695 (1984-10-01), Neil
patent: 4936666 (1990-06-01), Futhey
patent: 5044706 (1991-09-01), Chen
patent: 5073007 (1991-12-01), Kedmi et al.
patent: 5151823 (1992-09-01), Chen
patent: 5268790 (1993-12-01), Chen
"Infrared Zoom Lenses in The 1980s and Beyond", Allen Mann, Optical Engineering, vol. 31. No. 5, May, 1992 pp. 1064-1071.
"Binary Optics", Veldkamp et al., Scientific American, May, 1992, pp. 92-97.
"Diffractive Optical Elements For Use In Infrared Systems" Swanson et al., Optical Engineering vol. 28. No. 6, Jun., 1989, pp. 605-608.

LandOfFree

Say what you really think

Search LandOfFree.com for the USA inventors and patents. Rate them and share your experience with other people.

Rating

Infrared continuous zoom telescope using diffractive optics does not yet have a rating. At this time, there are no reviews or comments for this patent.

If you have personal experience with Infrared continuous zoom telescope using diffractive optics, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Infrared continuous zoom telescope using diffractive optics will most certainly appreciate the feedback.

Rate now

     

Profile ID: LFUS-PAI-O-1360615

  Search
All data on this website is collected from public sources. Our data reflects the most accurate information available at the time of publication.