Acoustic-optical imaging system
AssigneeCommissariat A L'energie Atomique Et Aux Energies Alternatives
InventorsArnaud Verdant, William Guicquero
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Abstract
The present invention relates to an imaging system, including: a coherent light source delivering an object beam and a reference beam; a device of modulation of the object beam with a modulation signal; an image sensor arranged to receive an interference pattern resulting from a combination of the object beam and of the reference beam; and a demodulation device, the system being configured to, during a measurement phase: apply to the modulation signal a first pseudo-random sequence of jumps of a parameter selected among the phase, the frequency, and the amplitude; and simultaneously apply to the modulated portion of the object beam a second pseudo-random sequence of jumps of said parameter, wherein the first and second sequences of jumps of said parameter are non-correlated.
Claims10
An imaging system, comprising:
- a coherent light source delivering an object beam and a reference beam;
- a modulation device capable of modulating all or part of the object beam with a modulation signal;
- an image sensor arranged to receive an interference pattern resulting from a combination of the object beam and of the reference beam;
- and
- a device of demodulation of the modulated portion of the object beam,
- the imaging system being configured to, during a measurement phase:
- apply to the modulation signal, via the modulation device, a first pseudo-random sequence of jumps of a parameter selected among a phase, a frequency, and an amplitude of the modulation signal;
- and
- simultaneously apply to the modulated portion of the object beam, via the demodulation device, a second pseudo-random sequence of jumps of said parameter,
- wherein the first and second sequences of jumps of said parameter have non-correlated patterns.
Dependencies are inferred from the claim text.