A multi-element plane mirror optical multi-pass absorption cell
A flat mirror and absorption cell technology, applied in the field of absorption cells, can solve the problems of contamination of the coating layer of the plano-concave lens, affecting the signal-to-noise ratio of the detection signal, and the high price of the plan-concave mirror, so as to improve the sensitivity and detection limit, protect the convex lens, improve the The effect of practicality
Active Publication Date: 2021-12-14
许棕
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Problems solved by technology
However, although this optical multi-pass absorption cell can achieve a long absorption path, it has shortcomings: when the instrument is used to detect pollution or corrosive trace gases for a long time, it is easy to cause pollution to the coating layer of the plano-concave lens, affecting The signal-to-noise ratio of the detection signal, and the coated plano-concave mirror is expensive, frequent replacement of the plano-concave mirror increases the cost of the detection instrument, and in the case of a good seal between the convex lens and the base, the optical path effect can be increased. Therefore, Aiming at the above problems, a multi-element planar mirror optical multi-pass absorption cell is proposed
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[0021] In order to make the technical means, creative features, goals and effects achieved by the present invention easy to understand, the present invention will be further described below in conjunction with specific embodiments.
[0022] like Figure 1-Figure 6 As shown, a multi-element plane mirror optical multi-pass absorption cell according to the present invention includes a multi-pass absorption cell body 8 with an air inlet 3 and an air outlet 7, and the multi-pass absorption cell body 8 has two The second plane mirror 10 coated with the first reflective film layer 11 and the first plane mirror 9 coated with the second reflective film layer 12 are installed at the end, and a base 13 is installed at the center of the multi-pass absorption pool body 8, and the A convex lens 4 with a hole is installed at the center of the base 13;
[0023] The first plane mirror 9 and the second plane mirror 10 are respectively sealed and connected to the two ends of the multipass pool ...
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The invention relates to the field of absorption pools, in particular to the multi-element plane mirror optical multi-pass absorption pool, comprising a multi-pass pool absorption pool body with air inlet holes and air outlet holes, and a multi-pass absorption pool placed in the multi-pass absorption pool There are flat mirrors coated with high reflection film at both ends of the body, and a convex lens placed in the center of the multi-pass pool body. The center of the convex lens has a vent hole, and the edge of the lens is airtightly connected with the edge of the central base of the absorption pool body. In particular, the first plane reflector and the second plane reflector are hermetically connected to the two ends of the multi-pass pool absorption pool body, and the surface of the plane mirror connected to the two ends of the absorption pool is coated with a reflective film layer. The first plane mirror has an entrance pupil, and the second plane mirror has an exit pupil. The invention can be widely applied to the detection of atmospheric trace gas.
Description
technical field [0001] The invention relates to the field of absorption pools, in particular to a multi-element plane mirror optical multi-pass absorption pool. Background technique [0002] The optical multi-pass absorption cell is used as a high-sensitivity optical instrument. It is widely used in laser absorption spectroscopy technology. The light is reflected multiple times in the compact volume of the multi-pass cell to form a stable light field distribution to achieve a long optical path, thereby improving the detection sensitivity and detection limit. [0003] At present, a common optical multi-pass cell such as a Herriot multi-pass absorption cell using a spherical mirror disclosed in the European patent application EP2375237AI on October 12, 2011 and its method. The multi-pass absorption cell mentioned in the invention patent application document is composed of an absorption cell body with air inlet holes and air outlet holes, and flat concave mirrors located at bo...
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IPC IPC(8): G01N21/03
CPCG01N21/0303G01N21/031
Inventor 曹亚南程刚田兴张希军孙军红
Owner 许棕