Optical elements derived from stretched glass

Nicholas F. Borrelli

doi:10.1117/12.138928

11 January 1993 Optical elements derived from stretched glass

Nicholas F. Borrelli

Proceedings Volume 1761, Damage to Space Optics, and Properties and Characteristics of Optical Glass; (1993) https://doi.org/10.1117/12.138928
Event: San Diego '92, 1992, San Diego, CA, United States

Abstract

The physical elongation of a phase-separated glass by the application of a pulling stress to the glass above its softening temperature leads to a material with a number of interesting optical properties. This study is concerned with silver halide as the separated phase in an alkali-alumino- borosilicate glass. The initially spherically shaped halide particle is elongated into an elliptical shape by the action of the stretching process. As a consequence, the composite body acquires optical anisotropy exhibited as birefringence and dichroism. Experimental results show how the magnitude of the optical anisotropy can be related to shape anisotropy of the particles and, in turn, to the pulling stress. These results are discussed in terms of a simple polarizability model which adequately explains the results.

Citation Download Citation

Nicholas F. Borrelli "Optical elements derived from stretched glass", Proc. SPIE 1761, Damage to Space Optics, and Properties and Characteristics of Optical Glass, (11 January 1993); https://doi.org/10.1117/12.138928

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