FIELD: laser engineering. SUBSTANCE: the phase-shifting system has three or four mirrors. Each mirror turns radiation in the same plane so that the total turn of radiation equals 0 deg. and has a value of difference of phase shifts between "S" and "P" by the reflected radiation components within 0 to 90 deg., and the total value of phase shifts at the output of the phase-shifting system equals 90 deg. at a nominal value of the angles of incidence. The mirrors can synchronously change the angle of incidence relative to the nominal value within +10 to -10 deg. At least one of the mirrors has a monotonous dependence of the value of phase shift on the angle of incidence. The phase-shifting system can turn around the "input-output" axis, positioned on which are the first and last mirrors. EFFECT: enhanced quality of transformation of polarized radiation, can be used with lasers having an arbitrary orientation of vector E. 4 dwg
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