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Broadband dielectric film transflector for variable transmission optical filters |
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| Authors: | Qiong-Hua Wang Lei Li |
| Institution: | a School of Electronics and Information Engineering, Sichuan University, Chengdu 610065, China b Key Laboratory of Fundamental Synthetic Vision Graphics and Image for National Defense, Sichuan University, Chengdu 610065, China c College of Optics and Photonics, University of Central Florida, Orlando 32816, USA |
| Abstract: | A broadband multilayer dielectric film transflector for applications in variable transmission optical filters is proposed. The dielectric film is composed of alternating TiO2 and SiO2 layers deposited on a substrate. The transmittance of the dielectric film transflector can be varied from 0 to 100% by adjusting the individual dielectric layer thickness and the number of layers. The conjugate gradient method is used to optimize the design of the transflectors. The obtained transflectors have good transmittance and reflectance within the whole visible range and the incident angle range 0-20°. The manufacturing tolerances on film thickness and refractive index are reasonably large. |
| Keywords: | Transflector Optical filter Variable transmission |
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