FIELD: optics.
SUBSTANCE: invention relates to optical instrument making and relates to a spectral splitter for converting an initial light beam from a light source into four light beams. Device comprises a first polarization splitter splitting an initial light beam into two orthogonally polarized beams, two optical elements through which two orthogonally polarized beams pass, second and third polarization splitters, splitting two orthogonally polarized light beams into four corresponding output beams. Each of the two optical elements is birefringent, and the birefringence of both elements depends on the wavelength.
EFFECT: high power and efficiency of using light beams.
11 cl, 10 dwg
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