Atmosphere visibility measurement device based on optical cavity ring down spectroscopy technology

A technology of optical cavity ring-down spectroscopy and atmospheric visibility, which is applied in measurement devices, material analysis by optical means, instruments, etc., can solve the problems of measurement error, high cost, inconvenient use, etc., and achieve the effect of accurate measurement

Inactive Publication Date: 2015-06-24
ZHEJIANG MEASUREMENT SCI RES INST
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Problems solved by technology

However, there are the following problems: the need to use special optical fibers, which is not only costly, but also inconvenient to use; the absorption of the...

Method used

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  • Atmosphere visibility measurement device based on optical cavity ring down spectroscopy technology
  • Atmosphere visibility measurement device based on optical cavity ring down spectroscopy technology

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Embodiment 1

[0017] Such as figure 1 and 2 As shown, the dotted line in the drawing indicates the optical path, and the arrow indicates the direction of the optical path; the thin solid line indicates the electrical connection. An atmospheric visibility measurement device based on optical cavity ring-down spectroscopy technology, which includes a housing 11 with a saddle-shaped sealed cavity structure, and the housing 11 is a sealed cavity structure. There is a notch in the lower part of the housing 11, and the notch is recessed into the cavity of the housing 11. A pair of high-reflectivity cavity mirrors 7 are arranged in the cavity of the casing 11 , and the high-reflectivity cavity mirrors 7 are located on both sides of the notch of the casing 11 . A pair of high-reflectivity cavity mirrors 7 form a ring-down cavity 111 . The ring-down cavity 111 is an open structure, located outside the sealed cavity of the housing 11, and directly in contact with the atmosphere. In order to preven...

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Abstract

The invention provides an atmosphere visibility measurement device based on an optical cavity ring down spectroscopy technology and relates to a meteorological observation device. The atmosphere visibility measurement device comprises a saddle-shaped shell; a pair of high-reflectivity cavity mirrors are located at the two sides of a concave opening of the shell to form a ring down cavity; after laser transmitted by a laser transmitter penetrates through a polaroid, a 1/4 wave plate and a coupling lens in sequence and then is mitted into a first high-reflectivity cavity mirror, one path is reflected by the first high-reflectivity cavity mirror and is emitted into the polaroid through the 1/4 wave plate to be reflected and output; and the other path is vibrated in the ring down cavity, penetrates through the second high-reflectivity cavity mirror to be transmitted to a photomultiplier, and then is transmitted to a computer by a data acquisition card. By virtue of the atmosphere visibility measurement device, the technical problems that a measurement error is caused by the fact that the deviation is caused between the sampling of a sample to be detected for measuring the atmosphere visibility and the actual measurement in the prior art are solved. The atmosphere visibility measurement device has the beneficial effects that the open type ring down cavity can be in direct contact with atmosphere, and atmosphere extinction coefficient changes caused by gas molecules, aerosol and rainwater can be comprehensively measured, so that the accurate measurement of the atmosphere visibility is realized.

Description

technical field [0001] The invention relates to a meteorological observation device, in particular to a device for measuring atmospheric visibility by using optical cavity ring-down spectrum technology. Background technique [0002] As one of the elements of meteorological observation, atmospheric visibility is a physical quantity that characterizes the transparency of the atmosphere. The measurement of atmospheric visibility is not only used in the weather analysis of the daily meteorological department, but also widely used in highways, aviation, navigation and other transportation departments, military and other fields. At the same time, according to "QX / T 113-2010 Haze Observation and Forecast Grades", atmospheric visibility is the main basis for judging haze grades, so it is of great significance to study atmospheric visibility measurement devices. [0003] As a complex physical quantity, visibility mainly depends on the atmospheric extinction coefficient. The extinct...

Claims

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Application Information

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IPC IPC(8): G01N21/17G01N21/01
Inventor 潘孙强陈哲敏张建锋裘越
Owner ZHEJIANG MEASUREMENT SCI RES INST
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