Multiaxial scanning device based on scattered light passive differential optical absorption spectroscopy

Abstract

The invention discloses a multiaxial scanning device based on scattered light passive differential optical absorption spectroscopy. The multiaxial scanning device comprises a telescope height scanningmechanism, a camera height scanning mechanism, an azimuth scanning mechanism and a telescope receiving system, wherein a telescope height scanning mechanism emergence window and a camera height scanning mechanism emergence window are respectively coaxially connected with an azimuth scanning box body telescope incidence window and a camera incidence window; a telescope height scanning mechanism emergence optical axis and a camera height scanning mechanism emergence optical axis are respectively coaxial to an azimuth scanning mechanism telescope incidence optical axis and a camera optical axis,and are coaxial to a height rotation axis; the azimuth scanning mechanism is mounted on the telescope receiving system; an azimuth scanning mechanism emergence window is coaxially connected with a telescope receiving system incidence window, an azimuth scanning mechanism emergence optical axis is coaxial to a telescope receiving system optical axis and is coaxial to an azimuth scanning mechanismrotation axis. The multiaxial scanning device has the characteristics of simple tinstallation, low cost and high scanning precision, and can be widely applied to automatic monitoring of atmospheric pollutants in a troposphere.

Description

technical field [0001] The invention belongs to the technical field of differential absorption spectroscopy, in particular to a multi-axis scanning device for passive differential absorption spectroscopy of scattered light. Background technique [0002] The problem of air pollution in my country is becoming more and more serious, especially regional pollution. Timely and accurate acquisition of regional pollution information is a prerequisite for research and control of regional pollution. As a spectral telemetry method, differential absorption spectroscopy can successfully measure the whole-layer column density of trace gases in the stratosphere and troposphere, and is an effective means to comprehensively monitor and evaluate the status of regional air pollutants. Compared with the active differential absorption spectroscopy technology using artificial light sources such as Xe lamps, lasers, and LEDs, the passive differential absorption spectroscopy technology using scatte...

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Problems solved by technology

However, there are few devices in the prior art that use scattered light as a light source to measure the three-dimensional spatial distribution of tropospheric trace gases; at the same time, the existing multi-axis differential absorption method developed by Xu Jin et al. The spectroscopic system and the multi-axis differential absorption spectroscopy system developed by Shi Peng et al. to measure the concentration of HCHO columns in the troposphere, because of its applications such as not being able to record weather conditions and not being used for target reflected light differential absorption spectroscopy, and the rotation of optical fibers to affect light intensity , It cannot be used for detection in harsh environments such as rainy days, and the cable is exposed outside the instrument to affect the life of the cable, so it cannot be widely used in various observation environments

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