Method of manufacturing a gas sensor using the gas cell and the gas cell using a concave parabolic two

摘要

Disclosed are an optical cavity and a gas cell fabricated by using the same. The optical cavity is the most important element of the gas cell, which measures density of gas using light absorption characteristics of the gas. The gas cell includes two quadratic parabolic concave mirrors, which share a focus and an optical axis. Light incident toward the focus is reflected from the two quadratic parabolic concave mirrors so that the light may travel in parallel to the optical axis and the light incident in parallel to the optical axis may pass through the focus while being reflected from the two quadratic parabolic concave mirrors. The optical cavity includes two quadratic parabolic concave mirrors, which are aligned in opposition to each other with different focus lengths such that they share the focus using the reflection characteristics thereof.