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Proceedings Paper

Current developments in GRADIUM glass technology
Author(s): Boyd V. Hunter; Vineet Tyagi; David A. Tinch; Paul Fournier
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Paper Abstract

LightPath has continued efforts to improve the range of uses for GRADIUMTM glass. New glass lines as well as new geometries have been demonstrated. LightPath continues to work with software vendors to improve ease-of-use. At the 1998 CLEO, a lab sample of a transverse gradient (a.k.a. `biaxial') was shown. New products are expected soon. Laboratory work has demonstrated the viability of other glass families. A GTi (GRADIUM Titania) family has been developed as well as a GSI (GRADIUM Spectrally Invariant) material, based on US Patent #5,689,374, also for use as an achromatic transverse gradient. The new GLaK glass line has one existing profile currently ready and will be publicly released this summer. Considerable efforts have also been made at improving the characterization of GRADIUM glasses, including more accurate profile measurements and investigations of appropriate techniques for modeling the dispersion. The improved accuracy is required for apochromatic systems. Finally, as a part of the ongoing process improvement effort, LightPath has formed a strategic partnership with Hikari glass. This relation ship will allow LightPath to have better control over the incoming glass supply and have a glass supply that is better suited for production of GRADIUM glasses. This change will alter the existing profiles; redefinitions will be available this summer.

Paper Details

Date Published: 21 September 1998
PDF: 12 pages
Proc. SPIE 3482, International Optical Design Conference 1998, (21 September 1998); doi: 10.1117/12.321980
Show Author Affiliations
Boyd V. Hunter, LightPath Technologies, Inc. (United States)
Vineet Tyagi, LightPath Technologies, Inc. (United States)
David A. Tinch, LightPath Technologies, Inc. (United States)
Paul Fournier, LightPath Technologies, Inc. (United States)


Published in SPIE Proceedings Vol. 3482:
International Optical Design Conference 1998
Leo R. Gardner; Kevin P. Thompson, Editor(s)

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