Optics: eye examining – vision testing and correcting – Spectacles and eyeglasses – Ophthalmic lenses or blanks
Patent
1990-10-22
1993-11-09
Sugarman, Scott J.
Optics: eye examining, vision testing and correcting
Spectacles and eyeglasses
Ophthalmic lenses or blanks
351161, G02C 704
Patent
active
052607275
ABSTRACT:
A lens and method of fabrication thereof for increasing depth of focus where the lens power can be a constant but the amplitude and phase of the wave across the pupillary aperture are variables. The lens can be constructed by shading regions thereof in accordance with a mathematical function, e.g., a Gaussian distribution or Bessel function over a predetermined geometry, such as e.g., concentric, parallel or radial. The lens may be of single power or multiple power, e.g., of the bi-focal type.
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Shannon & Wtatt, Applied Optics and Optical Engineering, vol. VIII (1980).
Mino & Okano, Improvement in the OTF of a Defocused Optical System through the use of Shaded Apertures, Applied Optics, Oct. 1971, vol. 10, No. 10, pp. 2219-2225.
Eisner Joseph
Oksman Henry C.
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