Abstract
The technique and results of the synthesis of polarization beam splitters for the long-wavelength infrared region of the spectrum of 8–14 microns are presented. In this range, bodies with temperatures around zero degrees Celsius begin to emit. In addition, this radiation has a low attenuation in a relatively humid or aerosol-saturated atmosphere. Therefore, it is widely used in night vision devices, rangefinders and thermal imaging cameras, including mobile systems with a variable angle of the optical axis relative to the angle of arrival of the incident electromagnetic wave. In systems with active illumination, polarized radiation and beam splitters are used to reduce the effect of backscattering interference. A review of patents and literature showed the absence of finished products for the considered wavelength range. In this paper, original designs of polarization beam splitters are proposed and their spectral optical characteristics are obtained.
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