Random phase diffuser for reflective imaging

US4153894A · kind A · utility

Assignee

• The United States of America as represented by the Secretary of the Department of Health, Education and Welfare · US

Inventors

• Gerard A. Alphonse · Princeton, US
• David Vilkomerson · Princeton, US
• Bernard W. Hurley · Collingswood, US

Key dates

• Filing date: Aug 9, 1977
• Grant date: May 8, 1979
• Expiry date: Aug 9, 1997

Classification

• Technology area (CPC G): Physics
• CPC primary: G01S7/52046
• WIPO field: Other consumer goods
• WIPO sector: Other fields

Abstract

Disclosed is a random phase diffuser which is inserted between a transducer and an insonification subject in accoustical imaging. The diffuser is comprised of an array of lossless elements which cause sound emitted by the transducer to be passed through and emitted with a phase value of 0.degree. or 180.degree.. Additionally disclosed is the combination of a random phase diffuser with a wedge coupling feature for increasing insonification efficiency.