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Proceedings Paper

Control of gradient index profile for gradient index glasses of macro size and large Δn for a varifocal slide projector lens
Author(s): Xiaojie Xu; Max Andrew Wickson; Michael Savard; Paul Sherman
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Paper Abstract

Axial gradient index lens blanks with values of (Delta) n up to 0.5, thicknesses and diameters up to 25 and 200 mm, respectively, have been produced by fusing together thin layers of glasses of progressively different indices of refraction. Smooth, step-free gradients are formed by controlled diffusion within and across the layers. Computer software has been developed to prescribe the gradient index profile and to control the diffusion process. Linear, quadratic, cubic, and a variety of other gradient index profiles can be produced by this method over a wide refractive index range. This paper discusses the diffusion software, process and metrology for a gradient blank currently in process to be used in a varifocal slide projector prototype.

Paper Details

Date Published: 25 November 1993
PDF: 10 pages
Proc. SPIE 2000, Current Developments in Optical Design and Optical Engineering III, (25 November 1993); doi: 10.1117/12.163665
Show Author Affiliations
Xiaojie Xu, Lightpath Technologies, Inc. (United States)
Max Andrew Wickson, Lightpath Technologies, Inc. (United States)
Michael Savard, Lightpath Technologies, Inc. (United States)
Paul Sherman, Lightpath Technologies, Inc. (United States)


Published in SPIE Proceedings Vol. 2000:
Current Developments in Optical Design and Optical Engineering III
Robert E. Fischer; Warren J. Smith, Editor(s)

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