Mozyr State Pedagogical University , Belarus

The model of a holographic interferometer, where a cubic optically active photorefractive crystal Bi12TiO20 (BTO) is used as a working environment, is suggested. In theoretical calculation of diffraction efficiency of the holograms which are written down in the crystal both electrooptical, and piezoelectric holographic recording mechanisms are used. The crystal is established according to results of theoretical predictions for achievement of the maximum diffraction efficiency of the transmission hologram. Feature of an interferometer is the diffusion mechanism of record of holograms without application of external electric field. The interferometer can be used for control of drawing of coverings on optical elements, and the increase in a thickness of a covering is in vitro modeled by means of a mobile piezoelectric mirror.