Acta Photonica Sinica, Volume. 44, Issue 3, 331002(2015)
Design and Fabrication of a Broad Spectrum and Wide Angle Beam Splitter in Smart Glasses Imaging System
Based on the optical film theory, the membrane system was introduced to optimize the evaluation function, and the TFC software was used to optimize the membrane system, so that a 0°to 75°wide spectrum of P-polarized light beam splitter was designed. In order to produce the beam splitter, H4 and MgF2 were chosen as high/low refractive index materials, and the electron beam and ion assisted deposition techniques were adopted. During the experiment, the film thickness error was analyzed and a crystal was used to control the highly sensitive layers, which solved the accuracy problem in the film preparation process. Utilizing the inverse analysis method to simulate the experimental results, the P-polarized light transmission spectrum curves become smoother by changing the thickness of the correction factor. The spectral testing shows that the average transmittance of the prepared beam filter is 60.3% with vertical incidence P-polarized light, which meets the requirements of the system.
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FU Xiu-hua, ZHANG Yu-shuai, KOU Yang, LI Xu-na, LIU Dong-mei, ZHANG Jing, LI Guang-hui. Design and Fabrication of a Broad Spectrum and Wide Angle Beam Splitter in Smart Glasses Imaging System[J]. Acta Photonica Sinica, 2015, 44(3): 331002
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Received: Aug. 15, 2014
Accepted: --
Published Online: Apr. 14, 2015
The Author Email: Xiu-hua FU (goptics@126.com)