Wavelength devision multiplex detection system that laser radar multi -wavelength is close

The utility model discloses a wavelength devision multiplex detection system that laser radar multi -wavelength is close. Does it include lens, two polarization beam splitters the glan polarizing prism, five fourth wave plates, four convergent lens, four detectors, four F the P etalon, speculum, four environment light filter plates. It can be with separately surveying no longer than the light energy of 4 wavelength components in the telescope received laser radar echo. When containing the close component of 4 wavelength in the echo, the laser echo of every wavelength can advance according to the route that direction selection is different that its institute contains the polarized component and finally arrive an appointed detector and can not get into other three detectors, the detection of realization wavelength devision multiplex. Provided is an advantage lies in: the system can detect the energy no longer than each component of four close -spaced wavelengths that mixes in the laser radar echo, and detection