Diffractive optical element both surfaces of which comprise diff

Details Diffractive optical element both surfaces of which comprise diff Diffractive optical element both surfaces of which comprise diff

1997-08-29

2000-03-07

Spyrou, Cassandra

Optical: systems and elements

Diffraction

From zone plate

359558, 359571, G02B 2746, G02B 518

Patent

active

060348194

ABSTRACT:
The invention has for its object to reduce the overall length of a single lens using a diffractive optical element, and provides a diffractive optical element applicable to an optical system for cameras such as silver salt cameras, and electronic cameras, in which both surfaces of the single lens are constructed of diffractive surfaces, are plane surfaces or have curvature, and comprise diffractive surfaces having, in order from a subject side thereof, positive power and positive power, positive power and negative power, and negative power and positive power.

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patent: 5748372 (1998-05-01), Kitagawa
G. J. Swanson, "Binary Optics Technology: The Theory and Design of Multi-Level Diffractive Optical Elements", Mass. Inst. Techn., Lincoln Laboratory, Technical Report 854, pp. 1-47, Lexington Massachusetts, Aug. 1989.
Thomas Stone and Nicholas George, Hybrid diffractive-refractive lenses and achromats, Applied Optics, vol. 27, No. 14, Jul. 15, 1988, pp. 2960-2971 (See. App. p. 6).

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