Shaped gradient fabrication in lenses by molding from axial grad

Details Shaped gradient fabrication in lenses by molding from axial grad Shaped gradient fabrication in lenses by molding from axial grad

1991-10-24

1993-08-17

Woodard, Joye L.

Glass manufacturing

Processes

With wearing away of surface material

65 301, 65 37, 65 54, 65102, 65106, C03B 2300

Patent

active

052364860

ABSTRACT:
Shaped gradient profiles of index of refraction in lenses are fabricated from axial gradients. While the resulting lens has both radial (or cylindrical) and axial components, and, strictly speaking, is not a pure radial (cylindrical) gradient, nonetheless, the presence of both the radial and axial components or cylindrical and axial components provides lens designers with greater flexibility in lens design than heretofore existed.

REFERENCES:
patent: 914316 (1909-03-01), Seymour
patent: 2596799 (1952-05-01), Tiuyer
patent: 2795084 (1959-06-01), Littleton
patent: 3150951 (1969-09-01), Mayhew
patent: 3208839 (1965-09-01), Nordberg
patent: 3899315 (1975-08-01), Siegmund
patent: 4073579 (1978-02-01), Deeg et al.
patent: 4902102 (1990-02-01), Breidenthal
Winter, 1943, Jour. Amer. Ceramic Soc. 24, pp. 189-200 Transformation Region of Glass.

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