Birefringence of gradient-index lenses of SELFOC type

Wladyslaw Artur Wozniak

doi:10.1117/12.190223

12 October 1994 Birefringence of gradient-index lenses of SELFOC type

Wladyslaw Artur Wozniak

Proceedings Volume 2169, Nonconventional Optical Imaging Elements; (1994) https://doi.org/10.1117/12.190223
Event: International Colloquium on Nonconventional Optical Imaging Elements, 1993, Rydzyna-Rokosowo, Poland

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.

Citation Download Citation

Wladyslaw Artur Wozniak "Birefringence of gradient-index lenses of SELFOC type", Proc. SPIE 2169, Nonconventional Optical Imaging Elements, (12 October 1994); https://doi.org/10.1117/12.190223

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