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|Title:||The production of Fresnel lenses in sol-gel derived Ormocers by holography|
|Author(s):||Oliveira, Peter William de|
Künstle, Holger C.
Schmidt, Helmut K.
|Year of Publication:||1994|
|OPUS Source:||Sol-gel optics III : 25-27 July 1994, San Diego, California / John D. Mackenzie, chair/editor; sponsored by SPIE--The International Society for Optical Engineering. - Bellingham, Wash., USA : SPIE, 1994. - (SPIE proceedings series ; 2288), S. 554-562|
|SWD key words:||Nanokomposit|
|DDC notations:||620 Engineering and machine engineering|
|Publikation type:||Conference Paper|
|Abstract:||Micro Fresnel lenses were prepared from photosensitive organic-inorganic nanocomposites of the Ormocer-type by irradiation of films of 10 µm in thickness with an interference pattern of two laser beams, mixing a planar reference wavefront and a spherical object wavefront. To monitor the polymerization behavior of the organic groups during irradiation under real time conditions, a characterization method was developed to study changes in optical thickness n d by measuring changes of index of refraction and shrinkage during polymerization. Three-dimensional Fresnel structures were obtained by removing the unpolymerized areas by a solvent. Variation of index of refraction can also be obtained by diffusion of monomers in regions of higher light intensity. A model, similar to the Colburn-Haines model is presented.|
|Link to this record:||urn:nbn:de:bsz:291-scidok-27614|
|Date of registration:||11-Mar-2010|
|Faculty:||SE - Sonstige Einrichtungen|
|Department:||SE - INM Leibniz-Institut für Neue Materialien|
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