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A wide-spectrum, bird-repellent technology, used in animal repellents, applications, animal husbandry, etc., can solve problems such as the limited use range of single-wavelength laser bird-repellent devices, achieve good long-term bird-repelling effects, and improve bird-repelling. Efficiency, the effect of expanding the species of bird repellent
Active Publication Date: 2014-05-28
BEIJING JIAOTONG UNIV
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However, laser bird repellers currently use single-wavelength lasers such as 532nm, 520nm, 633nm or 650nm, and research by the Wildlife Research Center of the United States Department of Agriculture shows that single-wavelength lasers can only have a good repelling effect on certain types of birds. and found that light in the spectral range from ultraviolet to 750nm has repelling effects on different kinds of birds
Therefore, the scope of use of single-wavelength laser bird repellers has serious limitations
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Embodiment 1
[0039] Concrete devices used in this embodiment:
[0040] Laser 1 is all solid state Nd:YVO 4 / LBO532nm picosecond mode-locked laser, laser wavelength 532nm, output power 2W, pulse width 300ps.
[0041] The optical coupling system 2 is a 40× microscope objective lens.
[0042] The nonlinear optical material 3 is a photonic crystal fiber with randomly distributed air holes at a zero-dispersion wavelength of 500 nm, and the length is not greater than 200 mm.
[0043] The optical collimation system 4 is a 20×microscopic objective lens.
[0044] The optical attenuator 5 is an optical filter whose transmittance at 532nm is not more than 2%, and the transmittance of light of other wavelengths within the spectral range of 300-750nm excluding 532nm is 99%.
[0045] The optical beam splitter 6 is a parallel plane beam splitting with an incident angle of 45°, and the ratio p of the transmittance and reflectance of the laser light in the spectral range of 300-750nm is 2%
[0062] The optical coupling system 2 is a 40× microscope objective lens.
[0063] The nonlinear optical material 3 is a photonic crystal fiber with a double zero dispersion wavelength of 550nm and 1053nm, and the length is not more than 200mm.
[0064] The optical collimation system 4 is a 20×microscopic objective lens.
[0065] The optical attenuator 5 is an optical filter, which is coated with an optical anti-reflection film at 800nm-1030nm, and the transmittance is not more than 1%, and is coated with an optical anti-reflection film at 300-750nm, with a transmittance of 96%.
[0066] The optical beam splitter 6 is a parallel plane beam splitting with an incident angle of 45°, and the ratio p of the transmittance and reflectance of the laser light in the spectral range of 300-75...
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Abstract
Disclosed is an ultra-broadband spectrum laser bird dispeller. The ultra-broadband spectrum laser bird dispeller comprises a laser device, an optical coupling system, a nonlinear optical material, an optical collimation system, an optical attenuator, an optical beam splitter, an optical focusing system, an optical collimation and beam expanding system, an optical mirror, an optical emergence window, a vertical mechanical rotating platform, a vertical mechanical rotating platform driving source, a horizontal mechanical rotating platform, a horizontal mechanical rotating platform driving source, a photoelectric receiver, a photoelectric control system and a remote control system. By the ultra-broadband spectrum laser bird dispeller, the problems of few bird dispelling species, poor bird adaptability of single-wavelength laser bird dispelling are solved effectively, and bird dispelling effect and bird dispelling efficiency are improved; application field and application range are expanded greatly, and the ultra-broadband spectrum laser bird dispeller can be used for dispelling other wildlife. The laser bird dispeller can be widely applied to places such as airports, orchards, forest farms, aquaculture farms, power stations, urban environmental protection areas and natural ecological preservation areas, and is of great significance to aviation safety, agriculture, fishery and forestry development, wildlife protection, ecological balance and the like.
Description
technical field [0001] The invention belongs to the technical field of laser bird repelling, and relates to the fields of bird vision, aviation ornithology, ecology, laser, nonlinear optics, optical waveguide theory and technology, electronics, automatic control and the like. It is suitable for bird repelling applications in airports, orchards, forest farms, aquaculture farms, power plants, urban environmental protection and ecological protection sites, etc. Background technique [0002] Due to the improvement of people's awareness of ecology and environmental protection, the number of various birds in the world is increasing, which seriously threatens the safe take-off and landing of aircraft, brings huge losses to agricultural production, horticultural production, and fish farming, and also affects wind power. The safety of power plants even affects urban environmental protection. At present, the methods of bird repelling mainly include voice bird repelling, wind force bi...
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