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Proceedings Paper

Realization of refractive continuous-phase elements with high design freedom by mask-structured ion exchange
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Paper Abstract

We suggest a new technique for fabricating a wide class of continuous refractive optical elements in glass by combining the technique of ion exchange with high precision structuring of metal masks. We call this technique mask structured ion exchange (MSI). We have demonstrated the potential of this method by fabrication of rectangular shaped microlenses with low numerical aperture for Hartmann-Shack wavefront sensing applications. The lenses, positioned on a 400 micrometers raster, had a fill factor of 100 %, a focal length of 33 mm and diffraction limited performance. Due to the special fabrication conditions, the lens shape, position and even the focal length can be varied spatially within one substrate. For realization of a high aperture microlens array by field assisted exchange process we could reduce proximity effects between adjacent mask apertures by MSI.

Paper Details

Date Published: 13 November 2001
PDF: 11 pages
Proc. SPIE 4437, Gradient Index, Miniature, and Diffractive Optical Systems II, (13 November 2001); doi: 10.1117/12.448159
Show Author Affiliations
Jochen Baehr, Univ. of Mannheim (Germany)
Karl-Heinz Brenner, Univ. of Mannheim (Germany)

Published in SPIE Proceedings Vol. 4437:
Gradient Index, Miniature, and Diffractive Optical Systems II
Thomas J. Suleski, Editor(s)

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