CN206112671U - Laser searchlight - Google Patents

Abstract

The utility model provides a laser searchlight, including laser diode, pass through anti - mirror, a focus lens group, the 2nd focus lens group, fluorescent powder layer, the scattering layer, first optical lens, the second goes out optical lens, distance detecting means and laser adjusting device. The laser of laser diode output is restrainted as incident laser, and incident laser bundle becomes two bundles through passing through anti - mirror beam split, a branch of focused on fluorescent powder layer by a focus lens group on, another bundle is focused on on the scattering layer by the 2nd focus lens group, mix the last output light of formation from the fluorescence of fluorescent powder layer output and the laser of scattering layer reflection. The distance of the distance detecting means real -time detection pre -irradiation square object body when the distance is less than safe distance, is adjusted the output light intensity or is closed laser output through laser adjusting device. Through the utility model discloses a laser searchlight's structure reduces the light intensity automatically in the time of can realizing that closely the scope is shone, prevents that the mistake from shining people's eye, harm personal safety.

Description

Laser searchlight

Technical field

This utility model relates to lighting field, more particularly to using the special lighting field of laser lighting.

Background technology

At present, LED light sources are replacing traditional electric filament lamp and electricity-saving lamp to become a kind of new lighting source, but LED Limited brightness, needs the special application field of high bright light source, such as light of stage illumination, headlight for vehicles, Projection Display at some In field, LED cannot just meet and require that.The semiconductor laser diode homologous with LED, it may have efficiently, energy-conservation, environmental protection, The advantage of life-span length, using LASER Excited Fluorescence powder technology（Long-distance fluorescent powder technology）The point source of super brightness can be obtained, The point source can be used on some special lighting fields.

LASER Excited Fluorescence powder technology is, by laser focusing to phosphor powder layer, to form the point light of a luminous point very little The Stimulated Light for producing high brightness is excited in source, fluorescent material, generally excites yellow fluorescent powder, gold-tinted and the residue of generation by blue laser Blue light form white light, then outgoing is collected by optical system.The characteristics of LASER Light Source, is, as laser energy is concentrated, because And the point source of super brightness can be formed, the very little laser searchlighting of beam divergence angle is can be designed that using the point source Lamp.The beam divergence angle of laser searchlight is generally within 1 °, thus can form several kilometers of irradiation distance, when closely according to When bright, as dispersion angle is little, beam energy is concentrated, if be irradiated to human eye by mistake, it is easy to cause human eye Blackout very To permanent loss vision, injury is produced to the person.

The content of the invention

In order to realize closely detecting the laser searchlight that beam brightness is automatically adjusted, the utility model proposes a kind of light Source system structure, including：Laser diode, transflection mirror, the first focus lens group, the second focus lens group, phosphor powder layer, scattering Layer, the first luminous lens, the second luminous lens, distance detection device and laser adjusting means；Wherein, the first focus lens group and Second focus lens group is symmetrical arranged with respect to transflection mirror；Laser from laser diode output is as incoming laser beam, described Incoming laser beam Jing transflection mirror light splitting becomes two beams, a branch of to be focused on phosphor powder layer by the first focus lens group, another beam quilt Second focus lens group is focused on scattering layer；The phosphor powder layer absorbs incident laser and is converted into wavelength difference therewith Fluorescence；The distance of the described laser searchlight objects in front of described distance detection device detection, distance detection device with swash Light adjusting means connects, and distance signal is fed back to laser adjusting means, described laser adjusting means and described laser two Pole pipe connects, and when the distance signal value for detecting is less than setting value, laser adjusting means controls the luminance of laser diode Degree closes laser diode.So, the distance of laser searchlight objects in front is detected by distance detection device, when apart from little When certain value, switch and the closing of laser are adjusted or control by brightness of the laser adjusting means to laser.So may be used During ensureing that object or person occurs in closer distance in front of the searchlight as much as possible, thus it is possible to vary the brightness of last outgoing beam or Searchlight emerging beam is opened or closed, so as to reducing the injury to human eye.

Description of the drawings

Fig. 1 is a kind of structural representation of embodiment of laser searchlight of the present utility model.

Specific embodiment

Fig. 1 is a kind of structural representation of embodiment of the laser searchlight of this utility model design.The laser searchlight Including laser diode 101, transflection mirror 102, the first focus lens group 103, the second focus lens group 104, phosphor powder layer 105, Scattering layer 106, the first luminous lens 107, the second luminous lens 108, distance detection device 2, laser adjusting means 3.Wherein, One focus lens group 103 and the second focus lens group 104 are symmetrical arranged relative to transflection mirror 102.From 101 outgoing of laser diode Collimation laser as incident laser beam, in the present embodiment, it is preferred that laser diode 101 adopt constant-current driving pattern, swash The collimation laser intensity of 101 outgoing of optical diode increases with the increase of electric current, and first 102 light splitting of Jing transflections mirror becomes two beams, and one Beam enters reflected light path, a branch of entrance transmitted light path.What transflection mirror 102 was reflected by the first focus lens group 103 of reflected light path Laser focusing on phosphor powder layer 105, the laser focusing that transflection mirror 102 is transmitted by the second focus lens group 104 of transmitted light path To on scattering layer 106.Phosphor powder layer 105 is arranged on a reflection substrate, and it can absorb laser outgoing fluorescence, outgoing Fluorescence is collected through the first focus lens group 103 again, becomes collimation fluorescent light beam, and the collimation fluorescent light beam will transmit through transflection mirror 102 outgoing.Scattering layer 106 has scattering and the effect reflected, and scattering layer 106 is to the laser light scattering of transmitted light path and reflects, instead Collect again by the second focus lens groups of Jing 104 for the laser penetrated, and becomes collimated laser beam, and the collimated laser beam is by Jing transflection mirrors 102 reflection outputs.The collimation fluorescent light beam of final reflected light path outgoing and the collimated laser beam synthesis one of transmitted light path outgoing Shu Guang, the synthesis light eventually pass 108 outgoing of the first luminous lens 107 and the second luminous lens.

In the present embodiment, it is preferred that distance detection device 2 adopts supersonic detection device, including 201 He of ultrasonic transmitter Ultrasonic reception device 202, ultrasonic transmitter 201 launch forward ultrasound wave, ultrasonic reception device 202 along the direction of outgoing beam Calculated the distance of objects in front after receiving the echo of objects in front by distance detection device 2, distance detection device 2 should be away from Laser adjusting means 3 is sent to from value, laser adjusting means 3 controls the driving current of laser diode 101, when distance value is less than The value of setting, such as 10m, then laser adjusting means 3 the input current value equal proportion of laser diode 101 is turned down, work as distance When value is less than ultimate value, such as 5m, then laser diode 101 is closed by laser adjusting means 3, stops light irradiation.

In the present embodiment, it is preferred that transflection mirror 102 relative to incoming laser beam slant setting at 45 °, reflected light path with The optical axis of transmitted light path is mutually perpendicular to.Transflection mirror 102 rationally can be arranged as needed to the light splitting ratio of incident laser beam, For example, the reflected beams 80%, transmitted light beam 20%, when the laser beam of transmitted light path is after scattering layer 106 is reflected, its In 80% will be reflected away by transflection mirror 102 again, only therein 20% can be again passed through transflection mirror 102 slatterns, thus The light energy lost altogether only has 20% × 20%=4%, is negligible substantially.

In the present embodiment, transflection mirror 102, will also be to phosphor powder layer in addition to carrying out light splitting to incident laser beam The fluorescence of 105 outgoing is filtered.Used as preferred embodiment of the present utility model, usual incident laser selects blue light, fluorescent material Layer 105 selects yellow fluorescent powder, and so, the blue light of the gold-tinted of 105 outgoing of phosphor powder layer and the reflection of scattering layer 106 can be obtained To white light.In order to export white light, the gold-tinted of the output of phosphor powder layer 105 should be completely through transflection mirror 102.This utility model has very Big degree of freedom, incident laser beam and fluorescent material need to only be changed into the laser and fluorescence of different wave length using the light-source structure Powder, can just obtain different output lights, and this simple replacement is same ought to be included within protection domain of the present utility model.

In the present embodiment, phosphor powder layer 105 is arranged on a reflection substrate, forms reflective phosphor powder layer, reflection Substrate can help phosphor powder layer to radiate.Scattering layer 106 is also disposed on a reflection substrate, forms scattered reflection layer, Ke Yiti High reflectance.In order that fluorescence and laser energy mix homogeneously in final output light, it is glimmering that the first focus lens groups of Jing 103 are collected The laser that light and the second focus lens group 104 are collected should have identical beam diameter and diverging angular distribution.

In the present embodiment, the mixed light is formed through 108 beam-expanding collimation of the first luminous lens 107 and the second luminous lens Telecurie irradiation outgoing beam of the angle of divergence less than 1 °.

By the effect of distance detection device 2, object that can be to be nearby likely to occur in front of real-time detection laser searchlight, The intensity or closing laser diode of output beam are reduced by automatically adjusting mode quickly, it is to avoid may injure the situation of human eye Occur.

Embodiment of the present utility model is the foregoing is only, the scope of the claims of the present utility model is not thereby limited, it is every The equivalent structure made using this utility model description and accompanying drawing content or equivalent flow conversion, or be directly or indirectly used in Other related technical fields, are included in scope of patent protection of the present utility model in the same manner.

Claims (5)

1. a kind of laser searchlight, it is characterised in that include：

Laser diode, transflection mirror, the first focus lens group, the second focus lens group, phosphor powder layer, scattering layer, first goes out light Lens, the second luminous lens, distance detection device and laser adjusting means；Wherein, the first focus lens group and second is focused on thoroughly Microscope group is symmetrical arranged with respect to transflection mirror；Laser from laser diode output is used as incoming laser beam, described incoming laser beam Jing transflection mirror light splitting becomes two beams, a branch of to be focused on phosphor powder layer by the first focus lens group, and another beam is focused on saturating by second Microscope group is focused on scattering layer；The phosphor powder layer absorbs incident laser and is converted into the different fluorescence of wavelength therewith；Institute The distance of the laser searchlight objects in front described in distance detection device detection stated, distance detection device and laser adjusting means Distance signal is fed back to laser adjusting means by connection, and described laser adjusting means is connected with described laser diode, when When the distance signal value for detecting is less than setting value, the luminosity or closing laser of laser adjusting means control laser diode Diode.

2. laser searchlight as claimed in claim 1, it is characterised in that the laser is blue laser, the phosphor powder layer For yellow phosphor coating.

3. laser searchlight as claimed in claim 2, it is characterised in that to incident laser, the transflection mirror realizes that 20% is saturating Penetrate, 80% reflection, while gold-tinted of the transmission from phosphor powder layer outgoing.

4. laser searchlight as claimed in claim 1, it is characterised in that the distance detection device is using infrared distance inspection Survey, laser distance detection, radio wave distance detection, ultrasonic one or more in detection or image distance detection method Combination.

5. laser searchlight as claimed in claim 1, it is characterised in that laser adjusting means is by curtage mode control The luminosity or laser diode of laser diode processed being opened and closing.