Research on notch filter for color blind glasses

• Main Authors: CHEN, CHANG-HAU, 陳昶豪
• Other Authors: HSU, JIN-CHERNG
• Format: Others
• Language: zh-TW
• Published: 2018
• Online Access: http://ndltd.ncl.edu.tw/handle/8hu2vu

碩士 === 輔仁大學 === 物理學系碩士班 === 107 === In this reasrch, the films of notch filters are deposited by electron gun evaporation system. Various notch filters have different center wavelengths, transmittances, and half bandwidths. For providing color blindness glasses, the notch filter has the lower transmittance at the center wavelength and the smaller half bandwidth, such as 25 nm. A symmetric thin film stack of the filters are designed by using aluminum oxide (Al2O3) as the high refractive index layer and silicon dioxide (SiO2) as the low refractive index layer. The optimal deposited notch filter has an 8% transmittance at the center wavelength 590 nm and a half bandwidth of 25 nm. The average transmittance in the side bands of the filter exceeds 80%. Finally, the transmittance color of the notch filters are evaluated at the coordinates of the CIE1931 chromaticity diagram.