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Proceedings Paper

Birefringence of gradient-index lenses of SELFOC type
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Paper Abstract

In recent 25 years a new kind of optical elements - gradient-index lenses, especially these of SELFOC type - meet with wide applications in many devices (photocopiers, compact disc players). Regardless of used in manufacturing of these lenses kind of technology, the nonuniformity of material (different doping concentration) and differences between the coefficients of linear expansion in the particular regions of the lens causes the internal stresses. Due to these stresses the gradient-index lens have to be considered as a birefringent medium. Anisotropy evoked by these stresses causes the splitting of the incident wavefront into two orthogonally polarized wavefronts and as a result: changing the image quality. The results of measurements of internal stresses and anisotropy for a few lenses are shown. The estimation of the split of the ordinary and extraordinary rays in these lenses and the numerical investigation of their diffraction image quality are presented.

Paper Details

Date Published: 12 October 1994
PDF: 12 pages
Proc. SPIE 2169, Nonconventional Optical Imaging Elements, (12 October 1994); doi: 10.1117/12.190223
Show Author Affiliations
Wladyslaw Artur Wozniak, Technical Univ. of Wroclaw (Poland)

Published in SPIE Proceedings Vol. 2169:
Nonconventional Optical Imaging Elements
Jerzy Nowak; Marek Zajac, Editor(s)

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