Glass manufacturing – Processes – Fusion bonding of glass to a formed part
Patent
1997-08-15
1999-06-29
Griffin, Steven P.
Glass manufacturing
Processes
Fusion bonding of glass to a formed part
65 38, 65 63, 264 132, 264 17, C03B 2320, C03B 1900
Patent
active
059171057
ABSTRACT:
A method is provided of manufacturing an optical element having an optical axis, and including a plurality of definable adjacent zones of optical material, each zone having a definable refractive index different from the refractive index of an adjacent zone and an Abbe number, the zones of optical materials being arranged parallel to each other to define a profile of refractive indices which is symmetric about a plane of symmetry along the optical axis of the element and parallel to the zones. The method include (a) arranging a plurality of substantially planar layers of optical material having different refractive indices and Abbe numbers in order of their respective refractive indices; (b) fusing and diffusing together the plurality of layers to form a solid body of optical material having a first face of material having the highest refractive index and a second face of material having the lowest refractive index of the plurality of selected optical materials; (c) removing two portions of the body, each including part of the first and second faces; and (d) joining the two portions together with faces of material of like refractive index abutting. In one embodiment, the optical element is a spectrally invariant lens.
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Savard Michael E.
Xu Xiaojie
Griffin Steven P.
LightPath Technologies, Inc.
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