Optical: systems and elements – Lens – Including a nonspherical surface
Patent
1995-12-06
1997-03-25
Epps, Georgia Y.
Optical: systems and elements
Lens
Including a nonspherical surface
369112, G02B 1318
Patent
active
056150504
ABSTRACT:
A toroidal lens has a first surface comprised of a convex curve rotated about a central axis and a second surface comprised of a concave curve rotated about the central axis. The toroidal lens receives a radiation beam and produces an annular or halo shaped radiation beam. This resulting annular beam is focussed by a focussing lens to a reduced focus spot size without sacrificing depth of focus.
REFERENCES:
patent: 3581099 (1971-05-01), Franke
patent: 3816160 (1974-06-01), Moore
patent: 3848970 (1974-11-01), Goodell
patent: 4429957 (1984-02-01), King
patent: 4712884 (1987-12-01), Sakuma et al.
patent: 4790612 (1988-12-01), Dickson
patent: 4961622 (1990-10-01), Gorman et al.
patent: 4997250 (1991-03-01), Ortiz, Jr.
patent: 5087983 (1992-02-01), Takahashi et al.
patent: 5132843 (1992-07-01), Aoyama et al.
Hideo Ando, "Phase-Shifting Apodizer Of Three or More Portions" Japan Journal of Applied Physics, vol. 31, 1992, Part 1 No. 2B No Month Available.
G. Indebetouw, "Nondiffracting Optical Fields", Journal of the Optical Society of America, vol. 6, No. 1, Jan. 1989.
Yamanaka, et al, "High Density Optical Recording by Superresolution" Japan Journal of Applied Physics, vol. 28, 1989, p. 197: No Month Available.
Bey Dawn-Marie
Epps Georgia Y.
International Business Machines - Corporation
Krall Noreen A.
Millett Douglas R.
LandOfFree
Optical system with reduced focus spot size 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 system with reduced focus spot size, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Optical system with reduced focus spot size will most certainly appreciate the feedback.
Profile ID: LFUS-PAI-O-2208699