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:
Nov. 29, 1977
Filed:
Dec. 10, 1976
Norman E Byer, Columbia, MD (US);
Stanley E Stokowski, Ellicott City, MD (US);
John D Venables, Baltimore, MD (US);
Martin Marietta Corporation, Bethesda, MD (US);
Abstract
Pyroelectric thermal detector with decreased susceptibility to vibrational noise is formed of a wafer of pyroelectric material having a thin central region supported and surrounded by a thicker rim. On the central region deposited electrodes define active detecting regions that are mirror images of each other across a line separating them. The active regions may be oppositely polarized domains electrically connected in parallel, or a continuous domain with the active regions electrically connected in series opposition. The deposited electrodes are brought out to the rim for external connection. The rim is everywhere spaced at least one thermal diffusion length from either active region. Mechanical support for the wafer is connected to the rim, is symmetrically disposed with respect to the line separating the active detecting regions, and is in contact with the rim over at least 75 percent of its linear extent.