DEVICE FOR HOLOGRAPHICALLY WRITING INFORMATION ONTO PHOTOTHERMOPLASTIC RECORD CARRIER Russian patent published in 1995 - IPC

FIELD: holographically writing information. SUBSTANCE: device has exposing channel 6 with optic system for splitting an output laser beam into reference and object beams. The channel furthermore comprises electrooptic element 26 with power supply source 27 for rotating a polarization plane of infra-red radiation by an angle of π4, polarization analyzer 28 adapted for outputting infra-red radiation from channel 6. Mirror reflector 29 for the infra-red radiation derived from the channel is optically coupled through polarization analyzer 28 with channel 6. Power supply source 27 is coupled with control unit 25 for control of electrooptic modulator of the laser. EFFECT: reduced power losses. 1 dwg