FIELD: optics.
SUBSTANCE: reflecting prism can be used in projection displays and other optical devices. Reflecting prism for bringing plane of polarization in rotation is made of optically transparent material and it has shape of rectangular parallelepiped with three truncated angles in form of prisms. Isosceles triangular bases of those prisms belong to mutual perpendicular sides of parallelepiped. One side face of any prism has to be cutting plane which forms one of three working surfaces of reflecting prisms. Working surfaces of prism are disposed at angle of total internal reflection and they are made for series reflection of incident light beam which cones to reflecting prism at angle of 90 degrees to its side to form exit light beam being co-linear to incident beam. Working surfaces at reflection of beam provide turn of plane of polarization.
EFFECT: improved reliability of operation.
6 cl, 3 dwg
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