PHASE-SHIFTING REFLECTION ELEMENT Russian patent published in 2003 - IPC

FIELD: laser optics, specifically, conversion of coherent radiation outside of resonator. SUBSTANCE: phase-shifting reflection element demonstrating high reflection factor and radiation stability comes in the form of reflection diffraction grating with rectangular shape of lines. Period T is less than length λ of radiation wave, width d and height h of protrusions of relief are established by formula , where Δ is required phase shift; γ is angle of incidence of beam on element. For creation of phase-shifting element λ/4 or λ/2, operating at angle of 45 degrees with incident radiation ( angle of incidence of beam on to element is 45 degrees ) width d and height h of protrusions of relief are found by formulas given in description of invention. EFFECT: raised operating efficiency of element. 3 cl, 5 dwg