Re-imaging optical system employing refractive and diffractive o

Details Re-imaging optical system employing refractive and diffractive o Re-imaging optical system employing refractive and diffractive o

1991-09-11

1993-10-26

Hannaher, Constantine

Optical: systems and elements

Diffraction

From zone plate

359356, 359434, 359566, 359569, G02B 308, G02B 518

Patent

active

052571335

ABSTRACT:
A re-imaging optical system (36) is provided which utilizes a combination of refractive and diffractive optical elements. The system includes an objective lens group (38) for focusing an incoming beam of light to a first image plane. A relay lens group (40) refocuses the beam of light in a second image plane after it passes through the first image plane. The relay lens group (40) includes a diffractive optical element (48) for correcting aberrations introduced by the objective and relay lens groups. The diffractive optical element (48) eliminates a number of individual optical elements which would otherwise be required to correct aberrations, thereby reducing the total number of optical elements in the system. In the preferred embodiment, the diffractive optical element (48) comprises a binary optical element. The resulting system yields better image quality, better throughput, and a lighter, less bulky, re-imaging optical system (36).

REFERENCES:
patent: 3923400 (1975-12-01), Hardy
patent: 3940204 (1976-02-01), Withrington
patent: 4218111 (1980-08-01), Withrington et al.
patent: 4637697 (1987-01-01), Freeman
patent: 4679891 (1987-07-01), Roberts
patent: 4895790 (1990-01-01), Swanson et al.
patent: 4936665 (1990-06-01), Whitney
patent: 4964686 (1990-10-01), Kato
patent: 5005960 (1991-04-01), Heimbeck
patent: 5013133 (1991-05-01), Buralli et al.
patent: 5044706 (1991-09-01), Chen
patent: 5100226 (1992-03-01), Freeman
patent: 5117306 (1992-05-01), Cohen
C. J. Swanson, W. B. Veldkamp, "Infrared Applications of Diffractive Optical Elements", SPIE Proceedings, vol. 885, Paper No. 22, 1988.

Affiliated with

Also associated with

Rating

Re-imaging optical system employing refractive and diffractive o does not yet have a rating. At this time, there are no reviews or comments for this patent.

If you have personal experience with Re-imaging optical system employing refractive and diffractive o, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Re-imaging optical system employing refractive and diffractive o will most certainly appreciate the feedback.

Rate now

Comments { 0 }

Profile ID: LFUS-PAI-O-963320