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:
Dec. 03, 2019
Filed:
Dec. 20, 2018
Seiko Epson Corporation, Tokyo, JP;
Yuki Hanamura, Azumino, JP;
Tsukasa Funasaka, Shiojiri, JP;
Seiko Epson Corporation, , JP;
Abstract
A cooling device of an optical element includes a circulation passage through which a fluid circulates. The circulation passage includes a window portion that is disposed on an incidence side or an emission side of the optical element and transmits light, an evaporation portion that is connected to the window portion and includes a plurality of channel portions, and a heat radiation portion that radiates heat of the fluid. The fluid transmits the light in a liquid state. The fluid is a liquid in the window portion. The fluid that is a liquid evaporates to vapor in the plurality of channel portions. The fluid that is vapor condenses into a liquid in the heat radiation portion. A sectional area of each channel portion is less than a sectional area of a boundary between the window portion and the evaporation portion.