Apparatus for constructing a hologram using acoustical radiation
Abstract
Abstract A METHOD AND APPARATUS FOR CONSTRUCTING A HOLOGRAM USING SOUND WAVES AS THE FORM OF RADIATION ENERGY. A SINGLE FREQUENCY ELECTRICAL SIGNAL IS CONVERTED INTO A COHERENT BEAM OF SOUND WAVES. THE SOUND WAVES ARE DIRECTED TOWARDS AND ENSONIFY (ILLUMINATE) THE OBJECT BEING HOLOGRAPHED. SOUND WAVES SCATTERED BY THE OBJECT ARE DETECTED IN A REFERENCE PLANE AND CONVERTED AT EACH LOCATION IN SAID PLANE INTO AN ELECTRICAL SIGNAL. THE ELECTRICAL SIGNAL FOR EACH LOCATION IS ADDED TO THE ORIGINAL ELECTRICAL SIGNAL TO PRODUCE AN ELECTRICAL OUTPUT SIGNAL PROPORTIONAL TO AMPLITUDE TIMES THE DIFFERENCE IN PHASE ANGLE OF THE TWO SIGNALS FOR THAT PARTICULAR LOCATION. THIS OUTPUT SIGNAL IS IN TURN USED TO MODULATE A LAMP WHOSE OUTPUT IS IMAGED ONTO A TRANSPARENCY AT A LOCATION IN GEOMETRICAL REGISTRATION WITH THE LOCATION OF THE DETECTED SIGNAL.
Inventors
- 👤 Kendall Preston Jr
Bibliographic Details
Claims Analysis
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