The patent badge is an abbreviated version of the USPTO patent document. The patent badge does contain a link to the full patent document.
The patent badge is an abbreviated version of the USPTO patent document. The patent badge covers the following: Patent number, Date patent was issued, Date patent was filed, Title of the patent, Applicant, Inventor, Assignee, Attorney firm, Primary examiner, Assistant examiner, CPCs, and Abstract. The patent badge does contain a link to the full patent document (in Adobe Acrobat format, aka pdf). To download or print any patent click here.
Patent No.:
Date of Patent:
Aug. 28, 1979
Filed:
May. 12, 1978
H Dale Collins, Richland, WA (US);
International Submarine Services, London, GB;
Abstract
A scan acoustical holographic apparatus and method is described for sequentially acoustically scanning the interior of an optically opaque volume. The apparatus includes an array of acoustical transducers that are coupled to the volume. A plurality of frequency divider means receive high frequency clock pulses and generate transmit electrical pulse signals to the transducers having a frequency that is a fraction of the clock pulse frequency. The phases of the transmit signals are controlled by programmable read-only-memories in accordance with the distances between the transducers and selected focal points within the volume to effectively focus the transducers on the focal point. Receive signals are mixed with the phase adjusted transmit signals to effectively focus the transducers during a receive mode and to generate high amplitude holographic signals when the receive signals are in phase with the phase altered transmit signals. The resultant holographic signals are electronically processed to form an electronic analogue hologram which is utilized to visually display a holographic image of the interior of the volume.