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Ultraviolet self-generating relief micro-optical elements through crosslinkingphotopolymerization of liquid resins

Published online by Cambridge University Press:  15 October 1999

S. Calixto
Affiliation:
Centro de Investigaciones en Optica, Apartado Postal 1-948, Leon Gto. 37000, Mexico
C. Croutxé-Barghorn*
Affiliation:
Département de Photochimie Générale (UMR 7525 du CNRS), ENSCMu, 3 rue A. Werner, 68093 Mulhouse Cedex, France
D. J. Lougnot
Affiliation:
Département de Photochimie Générale (UMR 7525 du CNRS), ENSCMu, 3 rue A. Werner, 68093 Mulhouse Cedex, France
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Abstract

The use of a self-processing dry photopolymer layer capable of memorizing optical information as a local change in thickness, is proposed for the fabrication of microlenses, binary holograms and gratings. Relief micro-optical elements are generated by direct imagewise exposure through a mask. A gradient of chemical composition and a gradient of surface free energy cause the transfer of reactive species between dark and illuminated areas. Contrary to conventional lithographic techniques that require wet chemical post-treatment to remove parts of the photoresist material, the fully self-processing character of this technique makes the record available in situ and immediately after exposure.

Keywords

Type
Research Article
Copyright
© EDP Sciences, 1999

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