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. 25, 1979
Filed:
Oct. 20, 1977
Applicant:
Inventor:
David H Vilkomerson, Princeton, NJ (US);
Assignee:
RCA Corporation, New York, NY (US);
Attorneys:
Primary Examiner:
Int. Cl.
CPC ...
G01N / ;
U.S. Cl.
CPC ...
73607 ; 73626 ; 128660 ;
Abstract
A transducing unit comprising a central section, detecting echoes returned through only a small portion of a relatively large aperture lens, surrounded by an annular section, detecting echoes returned through the remainder of the aperture, provides detected signals from the respective central and annular sections which are selectively utilized during respective specified time intervals in accordance with the operation of time-controlled switches to thereby change the effective depth of focus of the lens as a function of time.