Abstract
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.
Original language | English |
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Pages (from-to) | 4098-4100 |
Number of pages | 3 |
Journal | Optics Letters |
Volume | 36 |
Issue number | 20 |
DOIs | |
Publication status | Published - 15 Oct 2011 |