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. 12, 2014
Filed:
Jun. 04, 2009
Naohiro Kuze, Tokyo, JP;
Seiichi Tokuo, Tokyo, JP;
Yoshinori Yanagita, Tokyo, JP;
Asahi Kasei Microdevices Corporation, Tokyo, JP;
Abstract
The present invention relates to a quantum infrared sensor and a gas concentration meter using the same, the quantum infrared sensor having a small and simple device shape and also being capable of performing stable measurement against disturbance changes such as changes in the flow amount and the temperature of gas to be measured. The quantum infrared sensor includes a pair of quantum infrared sensor elements, a pair of optical filters and a holding frame. The pair of optical filters is provided closer to an infrared light source than is the pair of quantum infrared sensor elements. The pair of optical filters is configured to selectively transmit infrared rays in specific different wavelength ranges, respectively. The pair of optical filters is housed in an upper level of the holding frame and provided while facing the pair of quantum infrared sensor elements through a pair of through holes, respectively.