CN211746457U

CN211746457U - Laser beam expanding light source of laser bird repeller

Info

Publication number: CN211746457U
Application number: CN202020002968.9U
Authority: CN
Inventors: 李聪时; 董培; 王安民
Original assignee: Shourong Beidou Cloud Technology Co ltd; Xi'an Juzhu Photoelectric Technology Co ltd
Current assignee: Shourong Beidou Cloud Technology Co ltd; Xi'an Juzhu Photoelectric Technology Co ltd
Priority date: 2020-01-02
Filing date: 2020-01-02
Publication date: 2020-10-27
Anticipated expiration: 2030-01-02

Abstract

The utility model discloses a laser beam expanding light source that drives bird ware, including polychrome semiconductor laser, coupling optical fiber, primary collimating mirror, three maca formula beam expanders, polychrome semiconductor laser's light source end with the one end of coupling optical fiber is connected, coupling optical fiber dry in the air one section with primary collimating mirror's light source input end is connected, primary collimating mirror's light source output with three maca formula beam expanders's light source input is connected. The utility model discloses a same beam expanding lens is applicable to the collimation and the beam expanding of the laser of different wavelengths, improves the collimation nature of laser beam, makes the irradiation distance greatly increased of laser beam to improve the effective scope of action of laser bird repellent system.

Description

Laser beam expanding light source of laser bird repeller

Technical Field

The utility model relates to an aviation safety technical field especially relates to a laser beam expanding light source that bird ware was driven to laser.

Background

Birds are not only friends of human beings, but also bring much trouble to the production and life of people. Along with the improvement of environmental awareness of people, the activity range of birds is gradually enlarged, and the trouble brought to people is also gradually increased. For example, the collision of flying birds with airplanes is an international problem which troubles people for a long time and threatens the safety of aviation flight. In order to effectively protect the birds and keep the birds away from key production and living facilities, various bird repelling methods and equipment systems are designed. Laser bird repelling is an effective method and is increasingly paid more attention by people. The existing laser bird-repelling method generally adopts 532nm single-wavelength laser, and has the advantages of constant laser power, small beam diameter, narrow bird application range and low irritation. And the bird is repelled by adopting the multi-wavelength laser, and because no beam expander which is simultaneously suitable for the high collimation of the multi-wavelength laser is available, the bird repeller with the multi-wavelength laser is difficult to be used for a long distance, and the practical application of the multi-color laser bird repeller is greatly limited.

SUMMERY OF THE UTILITY MODEL

An object of the utility model is to provide a laser beam expanding light source that bird ware was driven to laser just in order to solve above-mentioned problem.

The utility model discloses a following technical scheme realizes above-mentioned purpose:

the utility model discloses a polychrome semiconductor laser, coupling optical fiber, primary collimating mirror, three maca formula beam expanders, polychrome semiconductor laser's light source end with coupling optical fiber's one end is connected, coupling optical fiber dry in the air one section with primary collimating mirror's light source input is connected, primary collimating mirror's light source output with three maca formula beam expanders's light source input is connected.

Further, the multicolor semiconductor laser can emit three monochromatic lights of 520nm, 638nm and 450nm, or any combination of the three monochromatic lights, and the light power of each wavelength can be adjusted between 0-2500 mW.

Further, the coupling fiber can perform beam shaping, so that the fiber outputs a circular beam with a limited divergence angle.

Further, the primary collimating lens can adjust the divergence angle of the laser beam emitted by the coupling optical fiber exit end to a proper angle and then output the laser beam to the three maca type beam expanders.

Furthermore, the three-piece maca type beam expander is provided with a main reflecting mirror, a secondary reflecting mirror and a correcting mirror, and beam expansion and divergence angle correction of lasers with different wavelengths are achieved.

The beneficial effects of the utility model reside in that:

the utility model relates to a laser beam expanding light source that bird ware was driven to laser, compared with the prior art, the utility model discloses a same beam expanding lens is applicable to the collimation of the laser of different wavelengths and expands the beam, improves the collimation nature of laser beam, makes the irradiation distance greatly increased of laser beam to improve the effective scope of action of laser bird system that drives.

Drawings

Fig. 1 is a schematic structural diagram of the present invention;

fig. 2 is a schematic view of the beam shape of the present invention.

In the figure: 1-multicolor semiconductor laser, 2-coupling optical fiber, 3-primary collimating lens, 4-three Maka beam expanding lenses, 5-emergent light, 6-rectangular light beam, 7-circular light beam and 8-annular light beam.

Detailed Description

The present invention will be further explained with reference to the accompanying drawings:

as shown in fig. 1 and 2: the utility model discloses a polychrome semiconductor laser 1, coupling optical fiber 2, primary collimating mirror 3, three maca formula beam expanding lens 4, polychrome semiconductor laser's light source end with coupling optical fiber's one end is connected, coupling optical fiber dry in the air one section with primary collimating mirror's light source input is connected, primary collimating mirror's light source output with three maca formula beam expanding lens's light source input is connected.

The multicolor semiconductor laser is designed in an integrated mode, can emit three monochromatic lights of 520nm, 638nm and 450nm or any combined polychromatic light of the three monochromatic lights by matching with a special driving power supply, the cross section of the light beam is a rectangular light beam 6, and the light power of each wavelength can be adjusted between 0-2500 mW. Laser emitted by the multicolor semiconductor laser is input into the coupling optical fiber, the optical fiber shapes the rectangular laser beam to form a light beam 7 with a circular cross section, the central power density of the light beam is high, and the light power density follows approximate cosine distribution or Gaussian distribution along the radius. The emergent light of the coupled optical fiber is input into an initial collimating lens, and the focal length of the collimating lens is adjusted, so that the divergence angle of the input light beam meets the requirement of a rear beam expanding lens on the divergence angle of the incident laser. And finally, butting the initial collimating lens with a beam expander, and forming a large-diameter collimated laser beam after the laser beam subjected to initial collimation passes through the beam expander. The beam expander is three-piece Maka type beam expander, and the laser beam entering the beam expander firstly irradiates on the secondary reflector with positive curvature radius, and after the divergence and reflection of the reflector, irradiates on the concave primary reflector on the same optical axis. The concave main reflecting mirror is a concave spherical mirror or a concave paraboloidal mirror, and the emergent light 5 is a circular light beam 8 which is emitted by the meniscus correcting mirror of the light outlet after being reflected by the concave main reflecting mirror. The meniscus correcting lens has the purpose of correcting spherical aberration and aberration, and reduces errors caused by the optical system to the laser beams with different wavelengths, thereby realizing the collimation and beam expansion of the laser beams with different wavelengths.

Examples

The multicolor semiconductor laser is adopted to emit three monochromatic lights of 520nm, 638nm and 450nm, or a polychromatic light of any combination of the three monochromatic lights, and the light power of each wavelength can be adjusted between 0-2500 mW. The coupling fiber selected a numerical aperture of 0.22 and a fiber core diameter of 105 μm. The emergent light of the multicolor semiconductor laser is rectangular light spots, after the light spots are shaped by the coupling optical fiber, the half divergence angle of the emergent laser beam of the coupling optical fiber is about 12.5 degrees, and the light spots are circular. The light beam is input into the beam expander after the divergence angle of the light beam is adjusted by the primary collimating lens. The beam expander selects three maca type beam expanders with equivalent focal length of 1800mm and caliber of 160, and after collimation and beam expansion, annular laser beams with outer diameter of 160mm are formed, and the divergence angle of the beams is smaller than 17 μ rad.

The basic principles and main features of the present invention and the advantages of the present invention have been shown and described above. It will be understood by those skilled in the art that the present invention is not limited to the above embodiments, and that the foregoing embodiments and descriptions are provided only to illustrate the principles of the present invention without departing from the spirit and scope of the present invention. The scope of the invention is defined by the appended claims and equivalents thereof.

Claims

1. The utility model provides a laser beam expanding light source that bird ware is driven to laser which characterized in that: the multi-color laser device comprises a multi-color semiconductor laser, a coupling optical fiber, a primary collimating mirror and three maca type beam expanders, wherein the light source end of the multi-color semiconductor laser is connected with one end of the coupling optical fiber, one section of the coupling optical fiber is connected with the light source input end of the primary collimating mirror, and the light source output end of the primary collimating mirror is connected with the light source input ends of the three maca type beam expanders.

2. The laser beam expanding light source of the laser bird scarer of claim 1, characterized in that: the multicolor semiconductor laser can emit 520nm, 638nm and 450nm monochromatic lights or any combination of the three monochromatic lights, and the light power of each wavelength can be adjusted between 0-2500 mW.

3. The laser beam expanding light source of the laser bird scarer of claim 1, characterized in that: the coupling optical fiber can perform beam shaping, so that the optical fiber outputs a circular beam with a limited divergence angle.

4. The laser beam expanding light source of the laser bird scarer of claim 1, characterized in that: the primary collimating lens can adjust the divergence angle of the laser beam emitted by the coupling optical fiber exit end to a proper angle and then output the laser beam to the three Maka beam expanders.

5. The laser beam expanding light source of the laser bird scarer of claim 1, characterized in that: the three-piece Maca type beam expander is provided with a main reflecting mirror, a secondary reflecting mirror and a correcting mirror, and beam expansion and divergence angle correction of lasers with different wavelengths are achieved.