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Narrowband filter spectral measurement device and measurement method

A narrow-band filter, spectral measurement technology, applied in the field of high spectral resolution lidar, can solve problems such as weak echoes

Active Publication Date: 2019-09-06
SHANGHAI INST OF OPTICS & FINE MECHANICS CHINESE ACAD OF SCI
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  • Application Information

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Problems solved by technology

High-spectral resolution lidar is an effective tool for detecting aerosols, but high-spectral resolution lidar receives long-distance effective signal echoes weakly, and background noise needs to be reduced when working during the day

Method used

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  • Narrowband filter spectral measurement device and measurement method
  • Narrowband filter spectral measurement device and measurement method
  • Narrowband filter spectral measurement device and measurement method

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Embodiment Construction

[0023] The present invention will be further described below in conjunction with the embodiments and accompanying drawings, but the protection scope of the present invention should not be limited thereby. Please refer to the schematic diagram, the schematic diagram is a narrowband filter spectral measurement system device, including laser, beam splitter, wavelength meter, first isolator, amplifier, second isolator, frequency doubling crystal, collimating mirror, diaphragm, filter , beam splitter, first focusing mirror, first detector, position control system, temperature control system, narrow-band filter, second focusing mirror, second detector, signal acquisition and processing system, signal generator. The positional relationship of the above components is as follows:

[0024] The laser is connected with the signal transmitter to form a frequency-sweepable laser. The light emitted by the laser is divided into two beams after passing through the beam splitter, one beam ente...

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Abstract

A narrowband filter spectral measurement system and device are provided. The narrowband filter spectral measurement device comprises a laser, a beam splitter, a wavelength meter, a first isolator, anamplifier, a second isolator, a frequency doubling crystal, a collimating mirror, an aperture, an optical filter, a beam splitter mirror, a first focusing mirror, a first detector, a position controlsystem, a temperature control system, a narrowband filter, a second focusing mirror, a second detector, a signal acquisition and processing system, and a signal generator. According to the technical scheme of the present invention, the maximum transmittance and transmission spectral width of the narrowband filter at a desired central wavelength can be measured, and the narrowband filter can be installed in a high spectral resolution laser radar in a facilitated manner, or when performing installation and calibration, by measuring the transmittance of the narrowband filter at the central wavelength, whether the installation angle of the narrowband filter is correct and whether the central wavelength is at the desired wavelength can be determined.

Description

technical field [0001] The invention belongs to the field of atmospheric laser radar, in particular to high spectral resolution laser radar, [0002] It is required to realize the measurement and calibration of the transmission spectrum of the narrow-band filter. Background technique [0003] Aerosol detection has become a crucial part of atmospheric environment monitoring in recent years. High-spectral resolution lidar is an effective tool for detecting aerosols, but high-spectral resolution lidar receives long-distance effective signal echoes weakly, and background noise needs to be reduced when working during the day. Narrowband filters can effectively reduce background noise, and often work together with interference filters to further filter out background light signals, so they are widely used in high-spectral resolution lidar. The installation angle of the narrowband filter greatly affects the strength of the echo signal. In order to check whether the narrowband fi...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G01S7/497G01J3/28
CPCG01S7/497G01J3/2803G01J2003/2859Y02A90/10
Inventor 朱小磊董俊发刘继桥竹孝鹏毕德仓陈卫标
Owner SHANGHAI INST OF OPTICS & FINE MECHANICS CHINESE ACAD OF SCI
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