[17p-B203-1~13] 3.2 Equipment optics and materials

[17p-B203-3] Development of CaF₂-PDMS diffusing / transparent material and numerical simulation

JInFeng Zhu¹, Keisuke Nakakubo¹, Hiroaki Yoshioka¹, Kinichi Morita^2,1, 〇Yuji Oki¹ (1.ISEE, Kyushu Univ., 2.Ushio Inc.)

Keywords:Optical diffuser, Wavelength Filter, Ultra Violet

We proposed novel type of UV wavelength filter based on polydimethylsiloxane matrix. CaF₂ micro particle was mixed into uncured PDMS and it was cured in film form of 1 mm thick. The difference of the refractive index dispersions between CaF₂ and PDMS can turn the diffusing film into transparent film at specified wavelength in UV region. The numerical calculation of Monte-Carlo has been performed in the case of the slight difference on the refractive indices, by using new random walking model with slight refraction.