CN101893205A - Led focusing optical system - Google Patents
Led focusing optical system Download PDFInfo
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- CN101893205A CN101893205A CN 200910107346 CN200910107346A CN101893205A CN 101893205 A CN101893205 A CN 101893205A CN 200910107346 CN200910107346 CN 200910107346 CN 200910107346 A CN200910107346 A CN 200910107346A CN 101893205 A CN101893205 A CN 101893205A
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- led light
- reflector
- light source
- gathering optics
- thin lens
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Abstract
The invention relates to an LED focusing optical system which comprises a reflector, an LED light source arranged at the focal point of the bottom of the reflector and also a thin lens arranged at the opening of the reflector, wherein the surface of the thin lens opposite to the LED light source is a convex surface. The LED focusing optical system realizes high collection of light beams of the LED light source through combination of the thin lens and the reflector to enable the brightness of central light spots to be strong, the influence on an luminescence angle of the system by adding the thin lens is small i.e. the variation of light spots at the outer ring of a lamp is not large, the height of the optical system is only 2-4 times of the size of the light source, and the optical system has the advantages of simple structure, small volume, strong light intensity and large radiation range, therefore, the LED focusing optical system can be widely applied to the field of focusing lamps such as flashlights, miner lamps, headband lamps and the like and fully satisfy the illumination requirement of people to the focusing lamps.
Description
Technical field
The present invention relates to the LED field of illuminating lamps, more particularly, relate to a kind of optical system of the LED of being applied to spotlight lamp.
Background technology
LED (Light Emitting Diode, be light emitting diode) have advantages such as optical efficiency height, the light quality is good, energy consumption is little, the life-span is long, volume is little, be widely used in illuminating industry, it is more general wherein to be applied to spotlight lamp, for example: torch, mine lamp, headband lamp etc.Simultaneously, operation spotlight lamps such as torch, mine lamp, headband lamp also win people with its light, small and exquisite advantage and like.
At present, most LED spotlight lamp adopts the light distributing method of paraboloidal reflector or collector lens to realize:
Shown in Figure 1A-C, adopt the optical system 1 (consulting Figure 1A) of paraboloidal reflector 11 separately, its distribution curve flux (consulting Figure 1B), attainable hot spot effect (consulting Fig. 1 C), from Figure 1B, find out about 84 degree of lighting angle of whole light fixture, the energy of light beam mainly concentrates on+/-3 degree scopes in (this angle is a beam divergence angle: light intensity is greater than half angle of central light strength), the about 1560cd of central light strength.
Shown in Fig. 2 A-C, adopt the optical system 2 (consulting Fig. 2 A) of collector lens 21, its distribution curve flux (consulting Fig. 2 B), attainable hot spot effect (consulting Fig. 2 C), from Fig. 2 B, find out about 44 degree of lighting angle of whole light fixture, the energy of light beam mainly concentrates on+/-3 degree scopes in, the about 2312cd of central light strength.
As shown in Figure 3, be understandable that people need operations such as torch, mine lamp, headband lamp to form two concentric hot spots with spotlight lamp on shadow surface when work, center small light spot 91 requires that high brightness, high optically focused degree (being that beam divergence angle is little) are arranged, and is mainly used in remote illumination; Outer ring large spot 92 requires that certain range of exposures is arranged (be the lamp luminescence angle is wanted big), and certain brightness is arranged, conveniently to satisfy the closely illumination of the human eye angular field of view during operation of people.
Yet from two top schemes, the lighting angle of the light fixture of employing paraboloidal reflector is very big, but central light strength is lower; Adopt the central light strength height of the light fixture of collector lens, but lighting angle is little, two schemes all can not satisfy the needs of people to this class light fixture.
Though the volume by increasing paraboloidal reflector (promptly increase paraboloidal reflector hatch bore diameter, increase the paraboloidal reflector degree of depth) also can improve the central light strength of light fixture, can not satisfy the demand of torch, mine lamp, the miniaturization of headband lamp.
Summary of the invention
The technical problem to be solved in the present invention is, at above-mentioned existing LED light-gathering optics, can not satisfy central light strength height, shortcoming that lighting angle is big simultaneously, a kind of LED light-gathering optics is provided, be applied to spotlight lamp, the central light strength of equal volume spotlight lamp can be improved, its lighting angle can be guaranteed again.
The technical solution adopted for the present invention to solve the technical problems is: a kind of LED light-gathering optics is provided, comprise: reflector and be positioned at the led light source at focus place, this reflector bottom, also comprise the thin lens that places the reflector opening place, this thin lens one side of led light source dorsad is a convex surface.
In LED light-gathering optics of the present invention, described thin lens is a planoconvex lens, and its one side towards led light source is the plane.
In LED light-gathering optics of the present invention, the radius of curvature of the convex surface of described planoconvex lens is more than or equal to 100mm, and less than 280mm.
In LED light-gathering optics of the present invention, the planar ends of described thin lens contacts with the openend end face of reflector or is gapped at interval.
In LED light-gathering optics of the present invention, described thin lens is a biconvex mirror, and its one side towards led light source also is a convex surface.
In LED light-gathering optics of the present invention, the radius of curvature of two convex surfaces of described biconvex mirror is all more than or equal to 100mm, and less than 280mm.
In LED light-gathering optics of the present invention, described thin lens is the bent moon thin lens, and its one side towards led light source is a concave surface.
In LED light-gathering optics of the present invention, the concave surface that described bent moon is thin and the radius of curvature of convex surface be all more than or equal to 100mm, and less than 280mm.
In LED light-gathering optics of the present invention, described reflector is a paraboloidal reflector.
In LED light-gathering optics of the present invention, the height of described LED light-gathering optics is 2～4 times of led light source size.
LED light-gathering optics of the present invention has realized that by the combination of thin lens and paraboloidal reflector the height of the light beam of led light source converges, make the brightness height of center spot, it is little to the influence of the lighting angle of system to set up thin lens simultaneously, the variation that is light fixture outer ring hot spot is little, and the height of optical system only is 2～4 times of dimension of light source, simple in structure, volume is little, light intensity is high, range of exposures is big, this LED light-gathering optics can be widely used in spotlight lamp fields such as torch, mine lamp, headband lamp, fully satisfies the lighting requirement of people to spotlight lamp.
Description of drawings
The invention will be further described below in conjunction with drawings and Examples, in the accompanying drawing:
Figure 1A is the light path schematic diagram of the optical system of existing employing paraboloidal reflector;
Figure 1B is the distribution curve flux figure of Figure 1A;
Fig. 1 C is the hot spot design sketch of Figure 1A;
Fig. 2 A is the light path schematic diagram of the optical system of existing employing collector lens;
Fig. 2 B is the distribution curve flux figure of Fig. 2 A;
Fig. 2 C is the hot spot design sketch of Fig. 2 A;
Fig. 3 is the hot spot schematic diagram of spotlight lamp;
Fig. 4 is the structural representation of the LED light-gathering optics of the preferred embodiment of the present invention;
Fig. 5 is the light path schematic diagram of Fig. 4;
Fig. 6 is the light path principle figure of Fig. 4;
Fig. 7 is the distribution curve flux figure of light beam before the process planoconvex lens that led light source 31 shown in Figure 4 sends;
Fig. 8 is the distribution curve flux figure of light beam after the process planoconvex lens that led light source 31 shown in Figure 4 sends;
Fig. 9 is the concrete size schematic diagram of Fig. 4.
The specific embodiment
As shown in Figure 4, Fig. 4 is the structural representation of the LED light-gathering optics of first embodiment of the invention.LED light-gathering optics 3 of the present invention comprises: led light source 31, reflector 32 and thin lens 33, led light source 31 place near the focus of reflector 32, and reflector 32 is with respect to the other end opening 321 of led light source 31, and thin lens 33 places this opening 321 places.In the first embodiment of the present invention, described reflector 32 is a paraboloidal reflector, described thin lens 33 is a planoconvex lens, planoconvex lens is plane 331 towards the one side of led light source 31, and, the openend end face of the planar ends of planoconvex lens and reflector 32 is in contact with one another or is gapped at interval, the planoconvex lens one side of led light source 31 dorsad is a convex surface 332, the radius of curvature of convex surface 332 is 150mm (consulting Fig. 9), certainly, the value of the radius of curvature of convex surface 332 is more than or equal to 100mm, and less than 280mm all can, for example: the radius of curvature of convex surface 332 also can be 110mm, 270mm etc.
Consult Fig. 5 and Fig. 6, Fig. 5 is the light path schematic diagram of Fig. 4, and Fig. 6 is the light path principle figure of Fig. 4; Because led light source 31 has certain area, angle through the light beam behind the reflector 32 is not desirable parallel, and it is angled, can converge at a bit behind such light beam reverse extending, by thin lens 33 the light secondary is converged again, make beam energy more concentrated, and directly can not guarantee the outer ring hot spot range of exposures of spotlight lamp by the light of thin lens 33 through reflector 32 reflections.
Consult Fig. 7 and Fig. 8, Fig. 7 is the light beam process planoconvex lens distribution curve flux figure before that led light source 31 shown in Figure 4 sends; Fig. 8 is that the light beam that sends of led light source 31 shown in Figure 4 is through the distribution curve flux figure behind the planoconvex lens.The light beam of led light source 31 pools 6 degree divergent beams behind paraboloidal reflector, be that beam divergence angle is 6 degree (consulting Fig. 7), central light strength is 1560cd, pool 4.5 degree divergent beams (consulting Fig. 8) through planoconvex lens again, central light strength is brought up to 2065cd by 1560cd, promoted the brightness of center spot, lighting angle then all remains on more than 80 degree.
Consult Fig. 9, Fig. 9 is the concrete size schematic diagram of Fig. 4.What deserves to be mentioned is, the height H of the LED light-gathering optics of first embodiment of the invention is about 23.6mm, led light source 31 dimension D are about 10mm, and promptly the height of LED light-gathering optics is about 2.5 times of led light source 31 sizes, and the degree of depth L of paraboloidal reflector only is 13mm.Be understandable that in other embodiments of the invention, the height of LED light-gathering optics can be 2～4 times of led light source 31 sizes, the degree of depth L of paraboloidal reflector can be 10～20mm; Hence one can see that, and LED light-gathering optics of the present invention is applied to spotlight lamps such as torch, mine lamp, headband lamp, satisfies the demand of miniaturization.
The LED light-gathering optics of second embodiment of the invention, be with the difference of first embodiment, the thin lens that the LED light-gathering optics is adopted is a biconvex mirror, two faces of described biconvex mirror are convex surface, the value of the radius of curvature of these two convex surfaces is more than or equal to 100mm, and less than 280mm all can, for example: the radius of curvature of two convex surfaces can be 110mm, 150mm, 200mm, 270mm etc.
The LED light-gathering optics of third embodiment of the invention, be with the difference of first embodiment, the thin lens that the LED light-gathering optics is adopted is the bent moon thin lens, described bent moon thin lens is a concave surface towards the one side of led light source, the value of the radius of curvature of this concave surface is more than or equal to 100mm, and less than 280mm all can, for example: the radius of curvature of concave surface can be 100mm, 120mm, 150mm, 200mm, 250mm etc.The described bent moon thin lens one side of led light source dorsad is a convex surface, and the value of the radius of curvature of this convex surface is more than or equal to 100mm, and less than 280mm all can, for example: the radius of curvature of convex surface can be 100mm, 160mm, 280mm, 260mm etc.
LED light-gathering optics of the present invention has realized that by the combination of thin lens and paraboloidal reflector the height of the light beam of led light source converges, make the brightness height of center spot, it is little to the influence of the lighting angle of system to set up thin lens simultaneously, the variation that is light fixture outer ring hot spot is little, and the height of optical system only is 2～4 times of dimension of light source, simple in structure, volume is little, light intensity is high, range of exposures is big, this LED light-gathering optics can be widely used in spotlight lamp fields such as torch, mine lamp, headband lamp, has fully satisfied the lighting requirement of people to spotlight lamp.
The above; only for the preferable specific embodiment of the present invention, but protection scope of the present invention is not limited thereto, and anyly is familiar with those skilled in the art in the technical scope that the present invention discloses; the variation that can expect easily or replacement all should be encompassed within protection scope of the present invention.Therefore, protection scope of the present invention should be as the criterion with the protection domain of claim.
Claims (10)
1. LED light-gathering optics, comprise: reflector (32) and be positioned at the led light source (31) at focus place, this reflector (32) bottom, it is characterized in that, also comprise the thin lens (33) that places reflector (32) opening (321) to locate, this thin lens (33) one side of led light source (31) dorsad is a convex surface.
2. LED light-gathering optics according to claim 1 is characterized in that, described thin lens (33) is a planoconvex lens, and its one side towards led light source (31) is the plane.
3. LED light-gathering optics according to claim 2 is characterized in that, the radius of curvature of the convex surface of described planoconvex lens is more than or equal to 100mm, and less than 280mm.
4. LED light-gathering optics according to claim 2 is characterized in that, the planar ends of described thin lens (33) contacts with the openend end face of reflector (32) or be gapped at interval.
5. LED light-gathering optics according to claim 1 is characterized in that, described thin lens (33) is a biconvex mirror, and its one side towards led light source (31) also is a convex surface.
6. LED light-gathering optics according to claim 5 is characterized in that, the radius of curvature of two convex surfaces of described biconvex mirror is all more than or equal to 100mm, and less than 280mm.
7. LED light-gathering optics according to claim 1 is characterized in that, described thin lens (33) is the bent moon thin lens, and its one side towards led light source (31) is a concave surface.
8. LED light-gathering optics according to claim 7 is characterized in that, the concave surface that described bent moon is thin and the radius of curvature of convex surface be all more than or equal to 100mm, and less than 280mm.
9. LED light-gathering optics according to claim 1 is characterized in that, described reflector (32) is a paraboloidal reflector.
10. LED light-gathering optics according to claim 1 is characterized in that, the height of described LED light-gathering optics is 2～4 times of led light source (31) size.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 200910107346 CN101893205A (en) | 2009-05-18 | 2009-05-18 | Led focusing optical system |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 200910107346 CN101893205A (en) | 2009-05-18 | 2009-05-18 | Led focusing optical system |
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|---|---|
| CN101893205A true CN101893205A (en) | 2010-11-24 |
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|---|---|---|---|
| CN 200910107346 Pending CN101893205A (en) | 2009-05-18 | 2009-05-18 | Led focusing optical system |
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Cited By (10)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102606978A (en) * | 2012-02-27 | 2012-07-25 | 广东工业大学 | Device and method for implementing smallest output beam angle of LED light source |
| CN103574519A (en) * | 2013-10-11 | 2014-02-12 | 深圳炫庆能源科技有限公司 | LED (light emitting diode) remote omni |
| CN104033840A (en) * | 2013-03-07 | 2014-09-10 | 长春理工大学 | Composite lens for secondary light distribution of stage lamp |
| CN104033841A (en) * | 2013-03-07 | 2014-09-10 | 长春理工大学 | Lens for secondary light distribution of stage lamp |
| CN104134742A (en) * | 2013-05-03 | 2014-11-05 | Lg伊诺特有限公司 | Light emitting device package and illumination apparatus |
| CN105650497A (en) * | 2012-05-04 | 2016-06-08 | 通用电气照明解决方案有限责任公司 | Reflector and lamp comprised thereof |
| CN106653987A (en) * | 2017-02-21 | 2017-05-10 | 深圳市纽艾迪电子科技有限公司 | Directional LED light-emitting part |
| CN106885221A (en) * | 2017-04-07 | 2017-06-23 | 贵州大学 | A kind of LED reflectors mine lamp and its design optimization method |
| CN107489955A (en) * | 2016-06-10 | 2017-12-19 | 欧司朗股份有限公司 | Lighting device, corresponding lamp and method |
| CN110748851A (en) * | 2019-10-11 | 2020-02-04 | 华南理工大学 | Optical system of automobile headlamp |
-
2009
- 2009-05-18 CN CN 200910107346 patent/CN101893205A/en active Pending
Cited By (12)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102606978A (en) * | 2012-02-27 | 2012-07-25 | 广东工业大学 | Device and method for implementing smallest output beam angle of LED light source |
| CN102606978B (en) * | 2012-02-27 | 2014-11-05 | 广东工业大学 | Device and method for implementing smallest output beam angle of LED light source |
| CN105650497A (en) * | 2012-05-04 | 2016-06-08 | 通用电气照明解决方案有限责任公司 | Reflector and lamp comprised thereof |
| CN104033840A (en) * | 2013-03-07 | 2014-09-10 | 长春理工大学 | Composite lens for secondary light distribution of stage lamp |
| CN104033841A (en) * | 2013-03-07 | 2014-09-10 | 长春理工大学 | Lens for secondary light distribution of stage lamp |
| CN104134742A (en) * | 2013-05-03 | 2014-11-05 | Lg伊诺特有限公司 | Light emitting device package and illumination apparatus |
| CN104134742B (en) * | 2013-05-03 | 2018-05-18 | Lg伊诺特有限公司 | Light emitting device package and lighting device |
| CN103574519A (en) * | 2013-10-11 | 2014-02-12 | 深圳炫庆能源科技有限公司 | LED (light emitting diode) remote omni |
| CN107489955A (en) * | 2016-06-10 | 2017-12-19 | 欧司朗股份有限公司 | Lighting device, corresponding lamp and method |
| CN106653987A (en) * | 2017-02-21 | 2017-05-10 | 深圳市纽艾迪电子科技有限公司 | Directional LED light-emitting part |
| CN106885221A (en) * | 2017-04-07 | 2017-06-23 | 贵州大学 | A kind of LED reflectors mine lamp and its design optimization method |
| CN110748851A (en) * | 2019-10-11 | 2020-02-04 | 华南理工大学 | Optical system of automobile headlamp |
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Application publication date: 20101124 |