Gas concentration detector and gas absorption chamber thereof

Abstract

The invention discloses a gas absorption chamber which comprises a box and three concave mirrors with the same curvature radius. The primary concave mirror is fixed in the box, the two secondary concave mirrors are fixed on the opposite side of the primary concave mirror in the box, the spherical surface of each secondary concave mirror is opposite to that of the primary concave mirror, and the sphere centers of the two secondary concave mirror are positioned on the spherical surface of the primary concave mirror and are in bilateral symmetry relative to a main axis of the primary concave mirror. Besides, an entrance port and an exit port are arranged on one side of the box close to the primary concave mirror and are in bilateral symmetry relative to the main axis of the primary concave mirror, and a gas inlet and a gas outlet are arranged in the plane, on which the sphere centers of the three concave mirrors are located, on the box, and the main axis of the primary concave mirror is parallel to the plane of the entrance port and the exit port. Compared with the prior art, the gas absorption chamber has the advantages that the effective optical distance thereof can be increased by more than ten times as compared with that of a single-optical-distance gas chamber, and the effective optical distance of the gas absorption chamber can be also doubled as compared with that of a traditional White gas absorption chamber.

Description

technical field [0001] The invention relates to the field of photoelectric detection, in particular to a gas concentration detector and a gas absorption chamber thereof. Background technique [0002] With the rapid development of the economy and the continuous improvement of people's lives, environmental pollution has become one of the major problems facing modern society. Among them, air pollution is particularly serious. With the continuous increase of pollutants in the atmosphere, it has caused great damage to the natural environment and human health. Therefore, in order to prevent the aggravation of air pollution, it is necessary to detect the composition and content of pollutants in the air. The specific detection method and device will be described by taking the detection of mercury content in the air as an example. [0003] Mercury is one of the pollutants harmful to health in the atmosphere. Its main sources include natural processes and human factors, such as volca...

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Problems solved by technology

[0007] In view of the above-mentioned defects, the object of the present invention is to provide a gas absorption chamber with a long optical path, to solve the problems of low reflection times and short optical path in the White gas absorption chamber in the prior art due to low space utilization, thereby improving the gas absorption rate. The absorbance of the absorption chamber, thereby improving the sensitivity of its detection and reducing its minimum detection limit

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