CN206112672U - Laser searchlight - Google Patents

Abstract

The utility model provides a laser searchlight, include: laser diode passes through anti - mirror, a focus lens group, and the 2nd focus lens group, fluorescent powder layer, the scattering layer, first optical lens, the second goes out optical lens, LED light source. Becomes two bundles through passing through anti - mirror beam split earlier from the laser diode emitting laser, a branch of focused on fluorescent powder layer by a focus lens group on, another bundle is focused on the scattering layer by the 2nd focus lens group on, first optical lens and confocal the arranging of second play optical lens, confocal plane of formation between them, the LED light source sets up on confocal plane or near its. Like this, through laser and LED's combination, obtain remote illumination and the laser searchlight that all is suitable for of illumination closely.

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, but closely During illumination, the so little angle of divergence is just improper.Further, since the complexity of LASER Excited Fluorescence powder technical scheme, in light The convergence of laser should be considered when learning system design, the collection of fluorescence is considered again, especially the mixing of two kinds of light and even light, make The scheme that beam divergence angle must be changed by focusing becomes extremely difficult.

The content of the invention

In order to obtain long distance illumination and closely illuminate the laser searchlight being all suitable for, the utility model proposes a kind of Light-source structure, including：Optical diode, transflection mirror, the first focus lens group, the second focus lens group, phosphor powder layer, scattering layer, First luminous lens, the second luminous lens, LED.Transflection mirror light splitting is first passed through from the laser of laser diode outgoing and becomes two beams, A branch of to be focused on phosphor powder layer by the first focus lens group, another beam is focused on scattering layer by the second focus lens group, the One luminous lens and the second luminous lens confocal arrangement, form a confocal plane between them, LED is arranged on confocal plane Or near which.So, LED light source is arranged by near focal point in long distance illumination light beam, when need according to it is remote when, open and swash Light, beam divergence angle are little；When need according to it is near when, open LED, beam divergence angle is big.By the combination of laser and LED, Ke Yiji The illumination zone of big expanded laser light searchlight, obtains long distance illumination and closely illuminates the laser searchlight being all suitable for.

Description of the drawings

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

Specific embodiment

Fig. 1 is the structural representation of the laser searchlight first embodiment of this utility model design.The laser of the present embodiment Searchlight includes laser diode 101, transflection mirror 102, the first focus lens group 103, the second focus lens group 104, fluorescent material Layer 105, scattering layer 106, the first luminous lens 107, the second luminous lens 108, LED light source 109.Wherein, the first condenser lenses Group 103 and the second focus lens group 104 are symmetrical arranged relative to transflection mirror 102.From the collimation laser of 101 outgoing of laser diode Used as incident laser beam, first 102 light splitting of Jing transflections mirror becomes two beams, a branch of entrance reflected light path, a branch of entrance transmitted light path. The laser focusing reflected transflection mirror 102 positioned at the first focus lens group 103 of reflected light path is located 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 is on scattering layer 106.Phosphor powder layer 105 It is arranged on a reflection substrate, it can absorb laser outgoing fluorescence, and the fluorescence of outgoing is again through the first focus lens group 103 collect, and become collimation fluorescent light beam, and the collimation fluorescent light beam will transmit through 102 outgoing of transflection mirror.Scattering layer 106 has scattering With the effect of reflection, scattering layer 106 is to the laser light scattering of transmitted light path and reflects, the laser of reflection the second focus lens groups of Jing again 104 collect, and become collimated laser beam, and Jing transflections mirror 102 is reflected output by the collimated laser beam.Final reflected light path outgoing Collimation fluorescent light beam and the collimated laser beam of transmitted light path outgoing synthesize a branch of emergent light, the emergent light eventually passes first 108 outgoing of luminous lens 107 and the second luminous lens.

In the present embodiment, it is preferred that transflection mirror 102 is obliquely installed relative to incoming laser beam is 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 beam selects blue light, glimmering Light bisque 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 To obtain 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 There is very big degree of freedom, only incident laser beam and fluorescent material need to be changed into the laser of different wave length and glimmering using the light-source structure Light 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, also including the first luminous lens 107 and the second luminous lens 108, they constitute confocal system Beam-expanding collimation is carried out to the light beam of the output of transflection mirror 102.There is the angle of divergence in several years from the light beam of the output of transflection mirror 102 generally, In order to obtain long distance illumination light beam of the angle of divergence less than 1 °, the mixed light also needs further beam-expanding collimation.Preferably, first goes out Optical lens 107 and the second luminous lens 108 are all convex lenss, and their mutual focuses overlap or are close to, between bifocal between Away from should be less than 5mm, so just common Jiao defined between the first luminous lens 107 and the second luminous lens 108 and being put down Face, can form long distance illumination of the angle of divergence less than 1 ° from the beam-expanding collimation of the light beam Jing confocal systems of the output of transflection mirror 102 Light beam.The closely illuminating bundle larger in order to obtain the angle of divergence, this utility model go out light in the first luminous lens 107 and second Near the common focal plane of lens 108, LED light source 109 is additionally provided with.The LED light source 109 has larger light-emitting area, in Between hollow out form the optical channel of laser module output beam, the size of the optical channel just allows the first luminous lens 107 to converge Light beam major part pass through.When long distance illumination light beam is needed, light laser is put, from the mixed light beam Jing of laser module outgoing the One luminous lens 107 are converged from LED light source 109 centrally through the little long distance illumination light beam of the formation angle of divergence；When needing low coverage From illuminating bundle when, light LED light source 109, due to the light-emitting area of LED light source 109 it is larger, from the light of 109 outgoing of LED light source The second luminous lens of Jing 108 are converged, and form the big closely illuminating bundle of the angle of divergence.By the combination of laser and LED, can obtain To the searchlight that far and near distance illumination is all suitable for.

In the present embodiment, LED light source 109 is arranged on common Jiao of the first luminous lens 107 and the second luminous lens 108 Plane adnexa, because the long distance illumination light beam from laser module outgoing is minimum in the beam cross section of focal plane adnexa, in this place There are enough spaces to go to arrange LED light source 109.The arrangement form of LED light source 109 is not limited, preferably around the symmetrical cloth of focus Put, two or four can be arranged, or enclosed around focus one.Light from 109 outgoing of LED light source can be 180 ° of lambertian distributions , or the light beam with certain angle of divergence after an optical lenses, it is preferred that an optics can be passed through Lens, make the rising angle of LED light source 109 less than 120 degree, so that more luminous energy are collected out by the second luminous lens 108 Penetrate.The angle of divergence of the light-emitting area of LED light source 109 and last outgoing beam is directly related.In order to obtain the near of the bigger angle of divergence Range blanking light beam, can further arrange adjusting means in the present embodiment, and the adjusting means scalable LED light source 109 is relative The distance of the second luminous lens 108, for example, using the focusing scheme of traditional LED flashlight, by adjusting LED light source relative second The distance of luminous lens 108, can further increase the angle of divergence from LED outgoing beams, i.e. the closely angle of divergence of illuminating bundle.

In this utility model, LED light source 109 is arranged by near focal point in long distance illumination light beam, when needing to shine When remote, laser is opened, beam divergence angle is little；When need according to it is near when, open LED light source 109, beam divergence angle is big.By laser With the combination of LED, can very big expanded laser light searchlight illumination zone, obtain long distance illumination and closely illumination be all suitable for Laser searchlight, and handoff functionality can be achieved with by electrical switch, it is convenient and swift no-delay.

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 (8)

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, LED light source；Transflection mirror light splitting is first passed through from the laser of laser diode outgoing and becomes two beams, it is a branch of Focused on phosphor powder layer by the first focus lens group, another beam is focused on scattering layer by the second focus lens group；First goes out A confocal plane is formed between optical lens and the second luminous lens；LED light source is arranged on the confocal plane or near which.

2. laser searchlight as claimed in claim 1, it is characterised in that first luminous lens and the second luminous lens are Plus lens or positive lens groups, the distance between the focus coincidence of two lens or focus are less than 5mm.

3. laser searchlight as claimed in claim 2, it is characterised in that first focus lens group and the second condenser lenses The relative transflection mirror of group is symmetrical arranged.

4. 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.

5. laser searchlight as claimed in claim 4, 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.

6. laser searchlight as claimed in claim 1, it is characterised in that LED light lens, institute are carried on the LED light source Stating LED light lens makes the rising angle of LED be less than 180 degree.

7. laser searchlight as claimed in claim 1, it is characterised in that the LED light source is arranged in the first luminous lens Near focal plane, and the optical axis around the first luminous lens is arranged.

8. laser searchlight as claimed in claim 1, it is characterised in that also including adjusting means, the adjusting means is adjustable Section LED light source relative to the first luminous lens distance or scalable LED light source relative to the second luminous lens distance.