Birefringence distribution measurement using high-speed camera

Le résumé fourni par la source

It enables to see the distribution of force as a tensor quantity with the phase contrast microscope. As the resolution of the phase contrast microscope increases, it also becomes possible to see the dynamics of mass transfer in cells and the stress acting on cells and tissues. However, there is no technology to measure a two-dimensional birefringence distribution with sufficient accuracy. In this research, we try to achieve these by using the laser photoelasticity method. Therefore, we made a prototype device of a full-field type measuring a birefringence using a high-speed camera. In order to measure magnitude and direction of a birefringence at the same time, the photoelastic modulator that electrically controls a birefringence is used in it. The PEM modulation frequency is about 20 kHz. In the past, high-speed cameras with faster frame rates were required for FFT analysis of images. That increased the cost of the entire measuring device. The purpose of this study is to measure the two-dimensional distribution of birefringence and to measure the birefringence at a frame rate that is slower than the modulation frequency.

Ce résumé expose les affirmations des auteurs. BNTIC ne l’interprète pas comme une validation indépendante des résultats.