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:
Apr. 07, 2020
Filed:
Dec. 21, 2018
Elt Sensor Corp., Bucheon-si, KR;
Ihn Lee, Seoul, KR;
Donghwan Kim, Bucheon-si, KR;
ELT SENSOR CORP., Bucheon-si, KR;
Abstract
Provided are an optical cavityfor a gas sensor which has a space therein and a gas sensor using the optical cavity, in which in the space of the optical cavity, an elliptical reflective surface, which constitutes a part of an ellipse () and reflects the light emitted from a position of one focal point Fof the ellipse to concentrate the light on the other focal point Fof the ellipse, is formed, a hyperbolic reflective surface, which constitutes a part of a hyperbola () having one focal point that coincides with the other focal point of the ellipse, and reflects the light, which is reflected by the elliptical reflective surface and concentrated on the other focal point of the ellipse, to concentrate the light on the other focal point fof the hyperbola, is formed, and a hyperbola centerline B-B', which connects one focal point of the hyperbola and the other focal point of the hyperbola, is inclined toward a side opposite to the elliptical reflective surface by a predetermined angle with respect to an ellipse centerline A-A′ which connects one focal point of the ellipse and the other focal point of the ellipse.