Multi-excitation wavelength spectrometer fluorescence laser radar system

A multi-excitation wavelength spectrometer fluorescence laser radar system, comprising:

• a multi-wavelength laser emission system, a signal frequency division system, and a data storage and display system;
• wherein the multi-wavelength laser emission system comprises a multi-wavelength laser assembly, a beam splitter, an integrated optical mirror, a first reflector, a second reflector, an mirror, and a frequency target assembly;
• the multi-wavelength laser assembly is configured to simultaneously generate lasers with wavelengths of 266 nm, 280 nm, 295 nm, 308 nm, 355 nm, 532 nm, and 1064 nm, and the beam splitter is configured to divide the lasers with wavelengths of 266 nm, 280 nm, 295 nm, 308 nm, 355 nm, 532 nm, and 1064 nm into a first laser and a second laser;
• the first laser comprises the lasers with wavelengths of 532 nm and 1064 nm, and the second laser comprises the lasers with wavelengths of 266 nm, 280 nm, 295 nm, 308 nm and 355 nm;
• the first laser is configured to be irradiated into the atmosphere through the first reflector, the integrated optical mirror and the mirror, and thereby generate mie scattering signals;
• the frequency target assembly is configured to, after the lasers with the wavelengths of 266 nm, 280 nm, 295 nm, 308 nm and 355 nm pass through the beam splitter (2), select the laser with a specific wavelength from the lasers with the wavelengths of 266 nm, 280 nm, 295 nm, 308 nm and 355 nm in an alternating manner;
• the laser with the specific wavelength is configured to be irradiated into the atmosphere after passing through the second reflector, the integrated optical mirror and the mirror, and generate a mie scattering signal after irradiating an organic matter in atmospheric particulate matters;
• and thereby the organic matter is alternately excited by the lasers with the wavelengths of 266 nm, 280 nm, 295 nm, 308 nm and 355 nm to generate fluorescence spectrum signals;
• wherein the data storage and display system comprises a fluorescence spectrometer, a data collector, an industrial computer, and a display;
• and the fluorescence spectrometer, the data collector, and the display are connected to the industrial computer individually;
• wherein the signal frequency division system comprises a Cassegrain astronomical telescope, a diaphragm, a first convex lens, a second convex lens, a first dichroic mirror, a second dichroic mirror, a trap wave filter, a polarizing crystal, an avalanche diode, a first photoelectric multiplier tube, a second photoelectric multiplier tube, a fluorescent frequency conversion frequency divider and a synchronous timer arranged in a designated manner to form a plurality of signal paths each with a signal transmission direction from the Cassegrain astronomical telescope to a corresponding one of the fluorescence spectrometer and the data collector;
• the Cassegrain astronomical telescope is configured to receive and focus the mie scattering signals and the fluorescence spectrum signals generated by the first laser and the second laser irradiated into the atmosphere;
• one of the plurality of signal paths with the signal transmission direction from the Cassegrain astronomical telescope to the fluorescence spectrometer has the diaphragm, the first convex lens, the first dichroic mirror, the second dichroic mirror, the trap wave filter, the fluorescent frequency conversion frequency divider, and the second convex lens sequentially arranged thereon in that order;
• the synchronous timer is connected to the industrial computer and configured to control the fluorescence frequency conversion frequency divider to be synchronized with the frequency target assembly.