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US 4,088,979 AGranted
Underwater imaging system
AssigneeWestinghouse Electric Corp.
InventorsCharles H. Jones, Milton Gottlieb
Life of this patent
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Abstract
Acoustic imaging system wherein signals from a target of interest impinge upon a set of receiving transducers. The transducer signals are processed and form the input signals to a transparent delay line through which is projected coherent light from a laser. Suitable optics and detectors are positioned relative to the projected laser beam so as to produce an output signal that is applied to a CRT to display a range profile or contour map of the target area.
Claims22
An electro-opto-acoustic imaging system comprising:
- acoustic means including a plurality of transducers each operable to provide an output signal indicative of acoustic energy from a target area to be viewed;
- an opto-acoustic delay line system;
- means for converting said signals into a phase hologram which propagates along said opto-acoustic delay line;
- and
- means for converting said phase hologram into a visual display of said target area.
2 more elements
An underwater imaging system comprising:
- means for projecting acoustic energy toward a target area of interest;
- a plurality of acoustic receiver transducers each operable to provide an output signal in response to reflected acoustic energy from said area;
- a source of a reference signal;
- means for combining said output signals with said reference signal to provide a set of output signals;
- means for sampling said output signals in sequence to form a composite signal;
- a source of coherent light;
- opto-acoustic delay line means transparent to said light;
- a source of carrier signal;
- means for modulating said carrier signal with said composite signal;
- means for injecting said modulated signal into said delay line means;
- means for projecting said light through said delay line means;
- utilization means positioned to intercept said light projected through said delay line means.
9 more elements
Dependencies are inferred from the claim text.