期刊
OPTICS LETTERS
卷 36, 期 20, 页码 4098-4100出版社
OPTICAL SOC AMER
DOI: 10.1364/OL.36.004098
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- U.S. Defense Advanced Research Projects Agency (DARPA)
- U.S. Army Research Office (USARO) [W911NF-10-1-0256]
A technique for accurate measurement of the principle refractive indices and birefringence for silklike samples is presented. It is based on rotating the linear polarization of the illuminating light on a silk immersed in reference liquid to achieve index matching at the silk/liquid interface. The technique was used to measure the principal refractive indices of a P. eburnus radial silk at different strains. This in turn allows the calculation of strain-optic coefficients. The first measurement of the strain-optic coefficients of spider silk is presented. The technique is more generally applicable to strain-optic study of birefringent micro-optic samples. (C) 2011 Optical Society of America
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