PROCESS RECORDING HOLOGRAPHIC DIFFRACTION GRATING Russian patent published in 2003 - IPC

FIELD: optics, optical filters. SUBSTANCE: prism adjoining one face of material is used to record grating by light beams crossing in volume of material. Two other faces of prism are oriented normally towards source of coherent radiation. According to another variant recording light beams are formed by one radiation source by simultaneous transmission of radiation through two faces of prism. In correspondence with third variant one face of prism is oriented normally towards radiation source and ensures transmission of radiation directly into light-sensitive material to form first light beam and on to another face of prism oriented so that radiation reflected from this face forms second light beam. Prism can come in the form of single unit with light-sensitive material. EFFECT: capability for recording of grating in range sensitive for crystal. 5 cl, 14 dwg