Laser radar set with high spectral resolution

A technology of laser radar and resolution, applied in measuring devices, re-radiation of electromagnetic waves, utilization of re-radiation, etc., can solve problems such as poor signal-to-noise ratio, few applications, and poor signal-to-noise ratio of ordinary visible light

Active Publication Date: 2015-07-22
ZHEJIANG UNIV
View PDF2 Cites 1 Cited by
  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Therefore, the current high spectral resolution lidar based on the Fabry-Perot interferometer filter is mainly used in the short-wavelength region of the ultraviolet and near-ultraviolet. In ordinary visible light, the signal-to-noise ratio is very poor, so it is rarely used, and in the longer waveband Due to the poor signal-to-noise ratio in the near-infrared region, it has not been reported yet

Method used

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
View more

Image

Smart Image Click on the blue labels to locate them in the text.
Viewing Examples
Smart Image
  • Laser radar set with high spectral resolution
  • Laser radar set with high spectral resolution
  • Laser radar set with high spectral resolution

Examples

Experimental program
Comparison scheme
Effect test

Embodiment

[0028] After the frequency locking system 15 locks the frequency of the Michelson interferometer filter 11 based on field of view widening to the single-frequency polarized pulse laser 1, the beam emitted by the single-frequency polarized pulse laser 1 is expanded by the beam expander 2 and then passes through the mirror a 3 and reflector b 4 are emitted into the atmosphere to be detected; they are scattered by atmospheric molecules and aerosol particles to generate lidar echo signals. After the laser radar echo signal is collected by the telescope 5, the background radiation of the sky is filtered out by the optical filter 6, and then split by the beam splitter 7, one signal is reflected into the photodetector a8, and the other signal is transmitted to the polarization beam splitter b9 for splitting. The S-polarized signal is reflected into the photodetector b10, and the P-polarized signal is transmitted to the Michelson interferometer filter 11 based on field-of-view widening...

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
Login to view more

PUM

No PUM Login to view more

Abstract

The invention discloses a laser radar set with high spectral resolution. After a frequency locking system frequency-locks an expanded-field-based Michelson interferometer filter to a single-frequency polarized pulse laser, beams emitted by the single-frequency polarized pulse laser are reflected to detected atmosphere by reflectors a and b after passing a beam expander; after the beams are scattered by atmospheric molecules and aerosol particles, laser radar echo signals are generated; the laser radar echo signals are collected by a telescope; after sky background radiation is filtered by an optical filter, the signals are split by a beam splitter; one signal is reflected into a photoelectric detector a, and the other signal penetrates a polarizing splitter prism b before being divided into two; S-polarized signals are reflected into a photoelectric detector b, and P-polarized signals penetrate a high spectra resolution filer; the P-polarized signals passes the expanded-field-based Michelson interferometer filter to be received by a photoelectric detector c. The laser radar set with high spectral resolution is free of wavelength limitation, has large visual angle and is highly capable of searching laser radar echo signals.

Description

technical field [0001] The invention belongs to the technical field of laser radar, in particular to a laser radar device with high spectral resolution. Background technique [0002] In atmospheric detection, the atmospheric backscattered light received by lidar includes the Rayleigh scattering signal of atmospheric molecules with a wide spectral width and the Mie scattering signal of aerosol particles with a narrow spectral width. Since both Rayleigh and Mie scattering are elastic, their central spectra overlap with the LiDAR emission spectrum. High spectral resolution lidar uses the characteristics of aerosol scattering spectrum width different from other scattering spectra, and separates meter scattering and Rayleigh scattering spectra from atmospheric scattering through filters with high spectral resolution, and then inverts atmospheric parameters. Optical filters with high spectral resolution are one of the core technologies of high spectral resolution lidar. At prese...

Claims

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
Login to view more

Application Information

Patent Timeline
no application Login to view more
Patent Type & Authority Patents(China)
IPC IPC(8): G01S17/95G01S7/481
CPCY02A90/10
Inventor 刘东杨甬英成中涛
Owner ZHEJIANG UNIV
Who we serve
  • R&D Engineer
  • R&D Manager
  • IP Professional
Why Eureka
  • Industry Leading Data Capabilities
  • Powerful AI technology
  • Patent DNA Extraction
Social media
Try Eureka
PatSnap group products

Browse by: Latest US Patents, China's latest patents, Technical Efficacy Thesaurus, Application Domain, Technology Topic.

© 2024 PatSnap. All rights reserved.Legal|Privacy policy|Modern Slavery Act Transparency Statement|Sitemap