Holographic reconstructing apparatus

Details Holographic reconstructing apparatus Holographic reconstructing apparatus

1978-12-18

1981-07-14

Corbin, John K.

G03H 130

Patent

active

042783186

ABSTRACT:
Holographic reconstructing apparatus capable of exchanging a hologram memory plate and having a large memory capacity, wherein the position of the memory plate relative to an irradiating laser beam can be accurately controlled. A beam irradiated from a laser source is deflected by a light deflector and is selectively directed to a selected hologram to be read or directed intermittently to a region for dividing the laser beam into a plurality of laser beams. The intensity of each divided laser beam is detected by a light detector, and the detection signal is fed back to control the working point of the light deflector such that the center of the laser beam irradiates the center of the luminous laser beam dividing region. The working point is held until the light deflector again directs the laser beam to the dividing region so that the laser beam radiates a selected hologram on the hologram plate accurately.

REFERENCES:
patent: 3560072 (1971-02-01), Silverman et al.
patent: 3715733 (1973-02-01), Feiner et al.
patent: 3911410 (1975-10-01), Ohta et al.

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