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:
Aug. 18, 1992
Filed:
Mar. 20, 1991
Pierre A Badoz, Grenoble, FR;
Jean-Yves Duboz, Dole, FR;
Abstract
An optical detection device with a variable detection threshold. The optical detection device comprises at least one element having a heterostructure on a substrate, the heterostructure incorporating two conducting layers and, between the latter, a semiconducting layer forming a potential barrier with each of the conducting layers is provided. Excited electrons are formed when the heterostructure is illuminated by light radiation, whose energy is at least equal to the detection threshold of the heterostructure. This makes it possible to detect the radiation by an internal photoemission of electrons between one conducting layer and the other. The device also comprises variable biasing of the heterostructure, the biasing making it possible to vary the detection spectrum and threshold of the device. The optical detection device finds particular application to the detection of infrared radiation.