Multifocal optical device with novel phase zone plate and method

Details Multifocal optical device with novel phase zone plate and method Multifocal optical device with novel phase zone plate and method

1989-12-22

1991-02-26

Sugarman, Scott J.

Optics: eye examining, vision testing and correcting

Spectacles and eyeglasses

Ophthalmic lenses or blanks

35016216, 35016222, 350437, 350452, 351168, 351177, 623 6, G02C 704, G02B 2744, G02B 308, A61F 216

Patent

active

049957147

ABSTRACT:
A diffractive multifocal optical element comprising a phase zone plate of a Cohen lens design containing rotationally symmetrical, curved repetitive patterns designed to operate at a specific wavelength and which are also curved in r.sup.2 space.

REFERENCES:
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patent: 4210391 (1980-07-01), Cohen
patent: 4338005 (1982-07-01), Cohen
patent: 4340283 (1982-07-01), Cohen
patent: 4637697 (1987-01-01), Freeman
patent: 4641934 (1987-02-01), Freeman
patent: 4642112 (1987-02-01), Freeman
Ziegler, J. F.; "Fabrication or Correction of Optical Lenses"; IBM Technical Disclosure Bulletin; vol. 12; No. 10; Mar. 1970; pp. 1573-1575.
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Gomez-Reino et al., "Placas ZOnales de Amplitud y Fase: Teoria y Realizacion Experimental", Optica Pura y Aplicada, vol. 10, 1977.
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Kyuragi et al., "Higher-Order Suppressed Phase Zone Plates", Applied Optics, vol. 24, No. 8, 15 Apr. 1985.
Fincham et al., "Optics", Butterworths, London, 9th ed., 1980, pp. 72-75.

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