Elt Sensor Corp.

Ihn Lee

Donghwan Kim

The present invention provides an optical cavity for a gas sensor having a space defined therein, including: a first parabolic reflective surface formed on one wall surface in the space; a second parabolic reflective surface which is formed at a position facing the one wall surface, and is configured to reflect again a light emitted from a light source disposed at a focus of the first parabolic reflective surface and reflected by the first parabolic reflective surface so as to change a traveling path of the light; and a hyperbolic reflective surface formed so that any one focus of two foci coincides with a focus of the second parabolic reflective surface, and is configured to reflect the light made incident from the second parabolic reflective surface to change the traveling path of the light, and a value of c&#x2212;bof a hyperbola equation of hyperbola forming the hyperbolic reflective surface is in a range of 0&#x3c;c&#x2212;b&#x2264;4 mm.

Optical cavity for gas sensor and gas sensor having the same

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&#x2032; which connects one focal point of the ellipse and the other focal point of the ellipse.

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Seoul, South Korea

Ihn Lee