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:
Jul. 23, 1991
Filed:
Sep. 08, 1989
Lee S Tavrow, Somerville, MA (US);
Anita M Flynn, Arlington, MA (US);
Rodney A Brooks, Lincoln, MA (US);
Massachusetts Institute of Technology, Cambridge, MA (US);
Abstract
An infrared sensor operable without cooling and thus usable at room temperature comprises a substrate supporting thin films of pyroelectric material and switched capacitor control circuitry. The control circuitry compares the absolute capacitance of a reference thin film to that of a sensor thin film, thereby sensing infrared radiation without the use of a chopper device. The reference thin film is thermally coupled to the substrate, and the sensor thin film is thermally insulated form the substrate. To increase the fill factor, the sensor thin film is placed directly above the control circuitry. In another apsect, the sensor is adpated to sense visible and infrared light by adding a CCD sensor and appropriate control circuitry to the substrate.
Data source: USPTO (United States Patent and Trademark Office) public patent records. Weekly synchronization. How IDiyas builds this profile