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:
Feb. 21, 1989
Filed:
Nov. 16, 1987
Andrew A Turnbull, Reigate, GB;
U.S. Philips Corporation, New York, NY (US);
Abstract
A thermal radiation detector suitable for detecting radiation in a given wavelength range, for example 5 to 15 micrometers, includes a detecting element (10), such as a pyroelectric element, and a structure coupled to the element for improving performance by optimizing the absorption characteristic of the detector over a wide wavelength range. The structure comprises two dielectric layers (12 and 18) preceding the detecting element with optical thicknesses substantially one quarter of a selected wavelength in the wavelength range and an intermediate resistive layer (17) for absorbing incident radiation in the wavelength range. A reflective layer (15) is preferably disposed between the element and the adjacent dielectric layer. The dielectric layers may both comprise ZnS or Ge. One layer may comprise a portion of a flexible film used to support the detector.