Gas detector and absorption pool thereof

Abstract

The invention relates to a gas detector and an absorption pool thereof. The absorption pool is a plano-concave optical resonant cavity; near end reflecting points and far end reflecting points formed by light paths on a plane reflecting mirror and a concave reflecting mirror are all in circumferential distribution around an optic axis of the resonant cavity; a light inlet structure of incident light and a light outlet structure of emergent light are both arranged on the plane reflecting mirror; the positions of the light inlet structure and the light outlet structure can be arranged on a coincident reflecting point with different reflecting sequences and coincident positions, and can also be two mutually approaching points in the near end reflecting points. Through such arrangement, a gap between the light inlet structure of the incident light and the light outlet structure of the emergent light can be as small as possible. When the absorption pool is used, the dimension of the gas detector in a radial direction becomes small, the space is saved, the structure miniaturization is realized, and the carrying is convenient; in addition, the optical path of light rays becomes long in the optical resonant cavity with small volume, so that the subsequent gas detection work is facilitated.

Description

technical field [0001] The invention relates to the technical field of gas detection, in particular to a gas detector and an absorption pool thereof. Background technique [0002] Existing gas concentration detection devices, such as the Chinese patent document "A Portable Pollution Gas Concentration Detection Device" with the notification number CN 205593914 U, include an absorption pool, a light transmitter and a light receiver arranged on the same side of the absorption pool, and an optical The detection device connected to the receiver, wherein the absorption pool includes the absorption pool cavity for the gas to be measured to enter, and the absorption pool cavity is equipped with a near light source end reflector, a far light source end reflector, a near light source end reflector, a far light source end reflector, and a left and right distribution in the absorption pool cavity. The reflector at the light source end actually constitutes an optical resonant cavity. The...

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Problems solved by technology

[0004] However, since the light entrance structure (light entrance) of the incident light and the light exit structure (light exit) of the outgoing light in the above-mentioned prior art are distributed on opposite sides in the radial direction of the reflector near the light source end, this leads to The distance between the light entrance structure (light entrance) of the incident light and the light exit structure (light exit) of the outgoing light is too large, so that the distance between the light transmitter and the light receiver is set too large, resulting in the gas detection equipment in the path The size in the direction is too large, so that the structure of the detection equipment has problems such as large volume, heavy weight, and complicated structure, which cannot be used in extreme environments (high temperature vibration), and is not easy to carry.

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