Patent ID: 7227625

Claim:
A lidar system for meteorological observation, in which pulsed laser light having a prescribed central frequency is emitted from a laser device and reflected light thereof is observed, comprising: a spectral analyzer for spectrally analyzing reflected light for observation into light in the wavelength region of the laser light and light in wavelength regions other than the wavelength region of the laser light; a first filter for selectively passing light centered on a first frequency component among the light of the wavelength region of the laser light which has been spectrally analyzed by said spectral analyzer; a first photodetection unit configured to detect the first frequency component light having passed through said first filter; a second filter for selectively passing light centered on a second frequency component among the light of the wavelength region of the laser light which has been spectrally analyzed by said spectral analyzer; a second photodetection unit configured to detect the second frequency component light having passed through said second filter; a third photodetection unit configured to detect the light of the wavelength region of said laser light having been spectrally analyzed by said spectral analyzer; and, a fourth photodetection unit configured to detect the light of wavelength regions other than the wavelength region of the laser light having been spectrally analyzed by said spectral analyzer.