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:
Sep. 14, 2021
Filed:
May. 22, 2019
Taiyo Nippon Sanso Corporation, Tokyo, JP;
Takehiro Igarashi, Tokyo, JP;
TAIYO NIPPON SANSO CORPORATION, Tokyo, JP;
Abstract
An object of the present invention is to provide an optical multipass cell that is compact and low cost, does not require the installation of a cooling mechanism around the mirror, and can increase the number of reflections of laser light, and the present invention provides an optical multipass cell comprising a container () to which a sample gas is supplied and a pair of concave mirrors (and) arranged so as to face each other inside the container (), a laser beam is incident into the container (), and the laser beam is multiply reflected between the concave mirrors (and), wherein at least one convex lens () is arranged on the optical path of the laser beam that is multiply reflected between the pair of concave mirrors (and) so that the central axis (C) thereof is inclined with respect to the central axis (C) of the concave mirrors (and), and an acute angle formed by the central axis (C) of the convex lens () and the central axis (C) of the concave mirrors (and) is equal to or less than a critical angle when the laser beam is emitted from the convex lens ().