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:
Mar. 15, 1977
Filed:
Oct. 17, 1974
Dietlind Pekau, Taufkirchen, DT;
Siemens Aktiengesellschaft, Berlin & Munich, DT;
Abstract
An apparatus and method for recording acoustical holograms characterized by the transmitting transducers having a directional characteristic, a transducer, which is either the transmitting or the receiving transducer, is mounted for rotation about at least one and preferably two axes, and the apparatus includes a reflector, which has at least a parabolic cross section taken on a plane extending perpendicular to the one axis, surrounds the rotatable transducer. When using the rotatable transmitting transducer, a plurality of stationary receiving transducers are utilized and if the receiving transducer is mounted for rotation, a plurality of stationary transmitting transducers are provided. If the transducer is rotated at about a single axis, the reflector has an axis which is parallel to the axis of rotation so that the sound beams are focused into lines lying on a plane. If the transducer is rotated about two axes, the reflector is a parabolic reflector which focuses the sound beams emitted into points lying on the plane.