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:
Jun. 03, 2008
Filed:
Mar. 16, 2005
Yoshiyuki Kanai, Tokyo, JP;
Kazumasa Ibata, Tokyo, JP;
Masaki Takechi, Tokyo, JP;
Shingo Masumoto, Tokyo, JP;
Yasuhiro Kajio, Tokyo, JP;
Shigeki Shoji, Tokyo, JP;
Ryu Akimoto, Tokyo, JP;
Yoshiyuki Kanai, Tokyo, JP;
Kazumasa Ibata, Tokyo, JP;
Masaki Takechi, Tokyo, JP;
Shingo Masumoto, Tokyo, JP;
Yasuhiro Kajio, Tokyo, JP;
Shigeki Shoji, Tokyo, JP;
Ryu Akimoto, Tokyo, JP;
Yamatake Corporation, Tokyo, JP;
Abstract
The long-side surface of a triangular prism is a detection surface. The distal end portions of coaxial light-emitting/light-receiving optical fiber cables are joined to one short-side surface of the prism. A thermoelectric cooling element is mounted on the other short-side surface of the prism. A mirror is provided between the cooling surface of the thermoelectric cooling element and the short-side surface. When dew condensation occurs on the detection surface, part of light applied from an optical fiber on the light-emitting side onto the lower surface of the detection surface exits from the prism through the condensed dew. The specular reflection returns to the lower detection surface by a mirror surface and is specularly reflected again. The specular reflection then enters an optical fiber on the light-emitting side. Dew condensation on the detection surface is detected by a change in the intensity of light received through the optical fiber.