FACILITY TO GENERATE IRIDESCENT HOLOGRAMS Russian patent published in 2003 - IPC

FIELD: recording and generation of iridescent holograms. SUBSTANCE: according to invention electrooptical spinner of polarization plane, microlens, point diaphragm and lens are installed in sequence along optical axis between electromechanical shutter and diffraction grating, field diaphragm, audio-signal generator and control unit are placed after diffraction grating. Diffraction grating comes in the form of acoustooptical light modulator controlled by audio-signal generator and control unit. Field diaphragm can have any geometric shape, projection lens forms image of field diaphragm in plane of plate carrying photoresist. Acoustooptical light modulator is manufactured in the form of n-sided prism with number of piezoconverters equal to n/2 where n can have any value up to 36. EFFECT: shortened time required for generation of iridescent hologram. 3 cl, 4 dwg