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:
Mar. 10, 2009
Filed:
Jun. 13, 2007
Douglas A. Herr, Lancaster, PA (US);
Douglas A. Herr, Lancaster, PA (US);
Lepton Technologies, Inc., Lancaster, PA (US);
Abstract
The apparatus is a miniature assembly which detects very low power infrared radiation and produces an electronic signal. The incoming infrared is combined in a wavelength multiplexer with high energy light from a laser chip and passed through an upconversion crystal (a nonlinear optical crystal) in which their frequencies are added together. The higher frequency, lower wavelength, light is then directed to a miniature blue sensitive photomultiplier tube that generates an electrical signal. A thermoelectric cooler is used to control the temperature of the laser chip, and the entire device is assembled into a package which is approximately the size of a cigarette pack.