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:
Sep. 16, 1980
Filed:
Jun. 21, 1978
Hitachi, Ltd., , JP;
Abstract
To provide an improved holographic operation, a digital type ultrasonic holography apparatus is provided utilizing a clock pulse generator having a predetermined periodicity, an ultrasonic pulse beam generator for directing an ultrasonic beam to an object for measurement in synchronism with said clock pulse, a reflected wave conversion unit for converting reflected ultrasonic pulse beams from said object for measurement into digital pulses, a time coincidence detector for detecting time coincidence between said clock pulse and said digital pulses contained in a predetermined gate period and producing as output a coincidence signal when they coincide with each other, a unit for moving an ultrasonic generating and receiving transducer included in said ultrasonic pulse beam generator to a desired position, and a display device for displaying the hologram of said object for measurement using said coincidence signal as a luminance signal and a position signal of said ultrasonic generating and receiving transducer as a deflection signal of said luminance signal. Using this holography apparatus a hologram of said object for measurement is displayed in a fringe pattern and the position and shape of said object for measurement are measured from those of the fringe pattern.