RU94036622A - Device recording large-size holograms - Google Patents

Abstract

FIELD: holography. SUBSTANCE: proposed device recording large-size holograms makes it possible to increase output of good samples of large-size holograms and to raise their quality. It includes source of coherent radiation, holographic interferometer, which reference and objets arms are optically coupled to registering medium deposited on photographic plate exhibiting property of self-diffraction under action of radiation, photoregistration unit mounted behind medium connected to former of control signals, phase shifters, first one being connected to output of generator of sinusoidal signals and second one - to output of former in which photoregistration unit and former of control signals are manufactured in the form of two channels. Each channel has lens mounted between photoregistration unit and registering medium. Lens of first channel is installed behind first region of registering medium . Lens of second channel is mounted behind second region which does not cross the first one. In addition there are installed comparator, electron key, phase shifter. Formers of control signal of first and second channels are each supplemented with one synchronous amplifier, output of first of them is connected to reference input of comparator, output of second one - to other input of comparator which output is connected to first input of electron key. Second output of second channel is connected to second input of key which output is connected to third phase shifter. EFFECT: increased output of good samples of large-size holograms, raised quality of holograms.

Claims (1)

The device allows to significantly increase the yield of large-sized hologram samples and improve their quality. The device includes a coherent radiation source, a holographic interferometer, the reference and object arms of which are optically coupled to a recording medium deposited on a photographic plate, which has the property of self-diffraction by radiation, a photographic recording unit installed behind the medium, connected to a control signal generator, phase shifting devices, the first of which is connected to the output of the sinusoidal signal generator, and the second with the output of the shaper; in which the photographic recording unit and the driver of control signals are made in the form of two channels, a lens is installed in each channel between the photographic recording unit and the recording medium, the lens of the first channel being installed behind the first region of the recording medium, the lens of the second channel - behind the second region that does not intersect with the first, additionally installed a comparator, an electronic switch, a phase shifting device, one synchronous amplifier is additionally installed in the driver of the control signal of the first and second channel y, the output of the first of them is connected to the reference input of the comparator, the output of the second is connected to the other input of the comparator, the output of which is connected to the first input of the electronic key, the second output of the second channel is connected to the second input of the key, the output of which is connected to the third phase-shifting device.