[8p-A410-1~10] 4.8 Strong Light Excitation Phenomena Applied to Materials and Bio Engneering

▲ [8p-A410-10] Polarization Imaging with a waveplate array of femtosecond laser written nanogratings inside silica glass

〇Masaaki Sakakura¹, Takafumi Ohfuchi^2,3, Yuya Yamada², Naoaki Fukuda², Toshio Takiya², Yasuhiko Shimotsuma³, Kiyotaka Miura³ (1.LAPRAS, 2.Hitachi Zosen, 3.Kyoto Univ.)

Keywords:femtosecond laser processing, glass, device application

We fabricated a waveplate array of nanograting structures inside a silica glass plate by femtosecond laser direct writing, and applied the waveplate array to a polarization imaging camera. Because the non-uniformity of retaradance and transmission in a waveplate array fabricated by fs laser processing prevents the conventional polarization analysis, we proposed generalized analytical method that can obtain polarization states regardless of non-uniformity of waveplates and poor adjustment. We will show the design of a waveplate array that decreases the analytical error and demonstrated realtime polarization imaging with the waveplate array.