In order to eliminate the polarization effect caused by oblique incidence of light, a design method of depolarizing prism based on Brewster condition is introduced. Select three common thin film materials, aluminum oxide and magnesium fluoride, to achieve the same effective refractive index of P-polarization, and achieve the same reflectivity of the two polarization states at a specific wavelength, which can achieve the effect of depolarization. Improving the distribution of the film layer has achieved the optimization of the reflectivity in a specific wavelength domain. The angular characteristics of a depolarized beam splitter prism using birefringence characteristics have been studied. Three design schemes have been provided with 30%, 50%, and 70% reflections. The polarization separation caused by an incident angle deviation of 2 ° is less than 5%.
Design and performance analysis of depolarized beam splitter prism
Hanzhong Brisun Optics Co., Ltd. Is the high precision optical element manufacturer provides customized production of Various optical lenses, including spherical lens, cylindrical lens, optical window, mirror, prism, filter, metal base mirror and other high-precision optical elements. The base materials include various optical glass, fused quartz, calcium fluoride (CaF2), zinc selenide (ZnSe), germanium (GE), silicon (SI), sapphire, metal and other materials. And provide antireflective film, high reflection film, spectroscopic film, metal film and other optical coatings.
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