CN102537833A - Floodlight total-reflection lens - Google Patents
Floodlight total-reflection lens Download PDFInfo
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- CN102537833A CN102537833A CN2010106203849A CN201010620384A CN102537833A CN 102537833 A CN102537833 A CN 102537833A CN 2010106203849 A CN2010106203849 A CN 2010106203849A CN 201010620384 A CN201010620384 A CN 201010620384A CN 102537833 A CN102537833 A CN 102537833A
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- lens
- total reflection
- blind hole
- axis
- floodlight
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Abstract
The invention relates to a floodlight total-reflection lens, which is used for light distribution of an LED light source, wherein the lens is a revolution body, the bottom surface of the lens is provided with a cylindrical blind hole for arrangement of the LED light source, the bottom of the blind hole is provided with a first conical surface, the axis of the blind hole is coincided with the axis of the lens, and the axis of the first conical surface is coincided with the axis of the lens; and the top surface of the lens is a concave spherical surface, and the sphere center of the concave spherical surface is positioned on the axis of the lens. According to the invention, the bottom of the blind hole on the bottom surface of the flood total-reflection lens is provided with the first conical surface, the top surface of the lens is the concave spherical surface, light with smaller light emitting angle of the LED light source is refracted by the first conical surface, refracted by the concave spherical surface again and then emitted, the light emitting angle of the emergent light is enlarged through twice refraction and amplification, and the light is scattered more uniformly, thus the problem that the light intensity at the axis approaching part of the LED light source is larger is solved, and more uniform floodlight distribution can be realized.
Description
Technical field
The present invention relates to be used for the light-distribution lens of led light source, more particularly, relate to a kind of floodlight total reflection lens that is used for the led light source luminous intensity distribution.
Background technology
When adopting led light source to carry out floodlighting; The general reflector that adopts carries out luminous intensity distribution to led light source, but the light distribution effect of this mode is not very desirable, this be because; The beam intensity ratio of the axial ray part of led light source is bigger; But this part light can not pass through the reflector luminous intensity distribution, so the floodlight allotted of reflector, and the light intensity that mid portion always can occur is higher.
In order to obtain floodlight luminous intensity distribution comparatively uniformly; Also have and adopt concavees lens that led light source is carried out luminous intensity distribution; But this mode is lower to the utilization rate of the luminous flux of led light source, shows that the bigger light in luminous angle of led light source can't be utilized, and finally causes the light efficiency utilization rate of light fixture too low.
In addition, also having one type of floodlight total reflection lens, is on the basis of the optically focused total reflection lens of led light source, to improve and come; As shown in Figure 1, make the effect that densely covered netted small salient point or bowl configurations are realized floodlight at the exit facet 1 of lens, also have and adopt the exit facet frosted to handle; The floodlight effect that these processing modes reach is all even inadequately; The floodlight angle is generally less, and because the exit facet of frosting or type frosted makes the light loss consumption.
Summary of the invention
The technical problem that the present invention will solve is, the above-mentioned defective to the floodlight total reflection lens of prior art provides the floodlight that a kind of light distribution effect is good, light loss is little total reflection lens.
The technical solution adopted for the present invention to solve the technical problems is: construct a kind of floodlight total reflection lens; The luminous intensity distribution that is used for led light source; Said lens are revolving body, and the bottom surface of said lens is provided with the columniform blind hole that is used to be provided with led light source, and the bottom of said blind hole has first taper seat; The axis of said blind hole and the dead in line of said lens; The axis of said first taper seat and the dead in line of said lens, the end face of said lens are concave spherical surface, and the centre of sphere of said concave spherical surface is positioned on the axis of said lens.
In floodlight total reflection lens of the present invention, the diameter of the bottom of said first taper seat and the equal diameters of said blind hole.
In floodlight total reflection lens of the present invention, establishing the bus of said first taper seat and the angle of axis is β, and the refractive index of said lens is n, relation below then β and n satisfy:
β＝90°-(3n/2-1)/(n-1)。
In floodlight total reflection lens of the present invention, the radius of said concave spherical surface is 45mm～55mm.
In floodlight total reflection lens of the present invention, the side of said lens is second taper seat.
In floodlight total reflection lens of the present invention, said lens are by the transparent material injection mo(u)lding.
In floodlight total reflection lens of the present invention, said transparent material is Merlon or polymethyl methacrylate.
In floodlight total reflection lens of the present invention, the refractive index of said transparent material is 1.45～1.65.
In floodlight total reflection lens of the present invention, the cone angle of said second taper seat is 72～80 degree.
In floodlight total reflection lens of the present invention, the diameter of said blind hole is less than 6mm.
The floodlight total reflection lens of embodiment of the present invention has following beneficial effect: the bottom of the blind hole of the bottom surface of lens of the present invention is first taper seat, and end face is a concave spherical surface; The less light in the luminous angle of led light source penetrates through the concave spherical surface refraction after this first taper seat refraction again; Amplify through twice refraction, the luminous angle of emergent ray becomes big, and it is more even that light disperses; Solve the bigger problem of light intensity of the axial ray part of led light source, can realize more uniform floodlight luminous intensity distribution.
Description of drawings
To combine accompanying drawing and embodiment that the present invention is described further below, in the accompanying drawing:
Fig. 1 is the sketch map of existing floodlight total reflection lens;
Fig. 2 is the sketch map of the preferred embodiment of floodlight total reflection lens of the present invention;
Fig. 3 is the profile of the preferred embodiment of floodlight total reflection lens of the present invention;
Fig. 4 is an A portion enlarged drawing among Fig. 3;
Fig. 5 is the luminous intensity distribution sketch map of the preferred embodiment of floodlight total reflection lens of the present invention;
Fig. 6 is the light distribution effect figure of the preferred embodiment of floodlight total reflection lens of the present invention.
The specific embodiment
Floodlight total reflection lens of the present invention is used for the luminous intensity distribution of led light source, and these lens are revolving body, preferred taper type; The bottom surface of lens is provided with the columniform blind hole that is used to be provided with led light source, and the bottom of blind hole has first taper seat, the axis of blind hole and the dead in line of lens; The axis of first taper seat and the dead in line of lens; The end face of lens is a concave spherical surface, and the centre of sphere of concave spherical surface is positioned on the axis of said lens, and the side of lens is a fully reflecting surface.Like this; The less light in the luminous angle of led light source penetrates through the concave spherical surface refraction after this first taper seat refraction again; Amplify through twice refraction, the luminous angle of emergent ray becomes big, and it is more even that light disperses; Solve the bigger problem of light intensity of the axial ray part of led light source, can realize more uniform floodlight luminous intensity distribution.
In floodlight total reflection lens of the present invention, the diameter of the bottom of first taper seat and the equal diameters of said blind hole.If the bus of said first taper seat and the angle of axis are β, the refractive index of said lens is n, relation below then β and n satisfy: β=90 °-(3n/2-1)/(n-1).The lens of mid portion, the concave spherical surface of especially first taper seat, and front end, main effect is that the smaller light in the luminous angle of LED is played diffusion, the luminous angle of this part emergent ray after first taper seat and concave spherical surface refraction becomes big 1.3～1.5 times.The relation of β and n promptly gets according to the requirement of design magnifying power is approximate.
To understand in order technical characterictic of the present invention, purpose and effect being had more clearly, to contrast accompanying drawing at present and specify the specific embodiment of the present invention.
To shown in Figure 4, be a preferred embodiment that is used for the floodlight total reflection lens of led light source of the present invention, in the present embodiment like Fig. 2; Lens 100 are revolving body, and this revolving body roughly is taper type in the present embodiment, and its side is second taper seat 103; The cone angle of second taper seat is 72～80 degree; The bottom surface 101 of lens 100 is the plane, and end face is a concave spherical surface 102, and the side of lens 100 i.e. second taper seat 103 is a fully reflecting surface; Total reflection takes place in the light that led light source sends on this second taper seat 103, after the end face refraction, penetrate then.
In the present embodiment; The bottom surface 101 of lens 100 is provided with the columniform blind hole 110 that is used to be provided with led light source; The diameter d of blind hole 110, smaller for the size that makes lens, diameter d is less than 6mm; Led light source is selected the smaller led chip of diameter as far as possible for use, and the diameter of blind hole 110 is 5mm in the present embodiment.In order the lighting angle of the smaller light of the lighting angle of led light source axial ray part to be amplified; The bottom of blind hole 110 is made as first taper seat 111; The dead in line of first taper seat 111 and lens 100, the diameter of the bottom of preferred first taper seat 111 is identical with the diameter of blind hole 110, and establishing the bus of first taper seat and the angle of axis is β; The refractive index of lens is n; Then β and n are approximate satisfy below relation: β=90 °-(3n/2-1)/(n-1), the refractive index of lens 100 is also just decided after the material of lens 100 is decided, and so just can confirm the value of β.For the better effect that realizes floodlighting, the present embodiment kind, the end face of lens 100 is a concave spherical surface 102; Can play the effect of concavees lens, the luminous angle of the light of LED axial ray part is had the effect of amplification, the radius of concave spherical surface 102 is 45mm～55mm; Its summit; Be concave spherical surface 102 and the intersection point of the axis of lens 100 is 8mm～12mm to the distance of lens bottom surface, this part will further play disperse function to light, make illumination more even.
In the present embodiment, lens are by the transparent material injection mo(u)lding, and the material of lens is a Merlon, i.e. PC, and its refractive index n is 1.59, the concrete parameter such as the following table of these lens:
| Blind hole diameter d (mm) | 5.0 |
| Lens bottom surface diameter (mm) | 6.0 |
| The length l of blind hole (mm) | 4 |
| The bus of the taper seat of blind hole bottom and the angle of optical axis | 87.7 |
| The bus of lens and the angle of optical axis (degree) (semi-cone angle) | 38 |
| Concave spherical surface radius r (mm) | 50 |
| The concave spherical surface summit is apart from the distance L (mm) of lens bottom surface | 9.1 |
| The diameter of the front end of lens (mm) | 22.2 |
| The height of lens (mm) | 10.4 |
The sketch map that Fig. 5 floodlight total reflection lens of the present invention cooperates with led light source, the light-emitting area of led light source 200 overlaps with the bottom surface of lens 100, and the diameter of the part of led light source 200 entering blind holes 110 is less than 3mm.There is figure to find out, second taper seat 103 of the light directive lens 100 that lighting angle is bigger in the luminous light of led light source 100, the concave spherical surface 102 by the front end of lens 100 after 103 total reflections of second taper seat penetrates; The less light of lighting angle is amplified at luminous angle after 111 refractions of first taper seat for the first time in the luminous light of led light source 200; After concave spherical surface 102 refractions, amplified for the second time; Amplify through twice refraction, the luminous angle of emergent ray becomes big, and it is more even that light disperses.Like this, through behind these lens 100, light is penetrated by the concave spherical surface 102 of the front end of lens 100 comparatively uniformly, obtains lighting effect relatively uniformly.
Fig. 6 shows the light distribution effect figure of the lens of present embodiment, can clearly be found out by figure, and in the scope of about 30 degree in luminous angle, light distribution is very even.
It will be appreciated that the parameter of floodlight total reflection lens of the present invention is not limited to the parameter of the foregoing description.Floodlight total reflection lens of the present invention can be by other transparent material injection mo(u)ldings, polymethyl methacrylate for example, i.e. and PMMA, perhaps other transparent materials, refractive index is between 1.45～1.65.
Combine accompanying drawing that embodiments of the invention are described above; But the present invention is not limited to the above-mentioned specific embodiment, and the above-mentioned specific embodiment only is schematically, rather than restrictive; Those of ordinary skill in the art is under enlightenment of the present invention; Not breaking away under the scope situation that aim of the present invention and claim protect, also can make a lot of forms, these all belong within the protection of the present invention.
Claims (10)
1. floodlight total reflection lens is used for the luminous intensity distribution of led light source, it is characterized in that; Said lens are revolving body, and the bottom surface of said lens is provided with the columniform blind hole that is used to be provided with led light source, and the bottom of said blind hole has first taper seat; The axis of said blind hole and the dead in line of said lens; The axis of said first taper seat and the dead in line of said lens, the end face of said lens are concave spherical surface, and the centre of sphere of said concave spherical surface is positioned on the axis of said lens.
2. floodlight total reflection lens according to claim 1 is characterized in that, the diameter of the bottom of said first taper seat and the equal diameters of said blind hole.
3. floodlight total reflection lens according to claim 2 is characterized in that, establishing the bus of said first taper seat and the angle of axis is β, and the refractive index of said lens is n, relation below then β and n satisfy:
β＝90°-(3n/2-1)/(n-1)。
4. according to each described floodlight total reflection lens of claim 1 to 3, it is characterized in that the radius of said concave spherical surface is 45mm～55mm.
5. floodlight total reflection lens according to claim 4 is characterized in that, the side of said lens is second taper seat.
6. floodlight total reflection lens according to claim 4 is characterized in that said lens are by the transparent material injection mo(u)lding.
7. floodlight total reflection lens according to claim 6 is characterized in that, said transparent material is Merlon or polymethyl methacrylate.
8. floodlight total reflection lens according to claim 6 is characterized in that, the refractive index of said transparent material is 1.45～1.65.
9. floodlight total reflection lens according to claim 5 is characterized in that, the cone angle of said second taper seat is 72～80 degree.
10. floodlight total reflection lens according to claim 4 is characterized in that the diameter of said blind hole is less than 6mm.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2010106203849A CN102537833B (en) | 2010-12-31 | 2010-12-31 | Floodlight total-reflection lens |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2010106203849A CN102537833B (en) | 2010-12-31 | 2010-12-31 | Floodlight total-reflection lens |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN102537833A true CN102537833A (en) | 2012-07-04 |
| CN102537833B CN102537833B (en) | 2013-09-11 |
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN2010106203849A Expired - Fee Related CN102537833B (en) | 2010-12-31 | 2010-12-31 | Floodlight total-reflection lens |
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| CN (1) | CN102537833B (en) |
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103343922A (en) * | 2013-06-28 | 2013-10-09 | 宁波福泰电器有限公司 | LED spotlight with lamplight similar to incandescent light |
| CN103529498A (en) * | 2013-10-30 | 2014-01-22 | 谭光世 | Lens |
| CN103712091A (en) * | 2012-09-29 | 2014-04-09 | 欧司朗股份有限公司 | LED light emitting module and method for manufacturing same |
| CN104329633A (en) * | 2014-10-16 | 2015-02-04 | 杭州意博高科电器有限公司 | Lens and anti-glare LED (light-emitting diode) lamp |
Citations (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| TWM345352U (en) * | 2008-01-03 | 2008-11-21 | Univ Nat Kaohsiung Applied Sci | Structure of LED lens for enhancing uniformity and angle of emitting light |
| CN201373329Y (en) * | 2009-01-20 | 2009-12-30 | 欧阳剑 | Led lamp lens |
-
2010
- 2010-12-31 CN CN2010106203849A patent/CN102537833B/en not_active Expired - Fee Related
Patent Citations (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| TWM345352U (en) * | 2008-01-03 | 2008-11-21 | Univ Nat Kaohsiung Applied Sci | Structure of LED lens for enhancing uniformity and angle of emitting light |
| CN201373329Y (en) * | 2009-01-20 | 2009-12-30 | 欧阳剑 | Led lamp lens |
Cited By (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103712091A (en) * | 2012-09-29 | 2014-04-09 | 欧司朗股份有限公司 | LED light emitting module and method for manufacturing same |
| CN103343922A (en) * | 2013-06-28 | 2013-10-09 | 宁波福泰电器有限公司 | LED spotlight with lamplight similar to incandescent light |
| CN103343922B (en) * | 2013-06-28 | 2016-05-25 | 宁波福泰电器有限公司 | The LED shot-light of imitative incandescent lamp light |
| CN103529498A (en) * | 2013-10-30 | 2014-01-22 | 谭光世 | Lens |
| CN103529498B (en) * | 2013-10-30 | 2016-03-16 | 谭光世 | A kind of lens |
| CN104329633A (en) * | 2014-10-16 | 2015-02-04 | 杭州意博高科电器有限公司 | Lens and anti-glare LED (light-emitting diode) lamp |
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| Publication number | Publication date |
|---|---|
| CN102537833B (en) | 2013-09-11 |
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Granted publication date: 20130911 Termination date: 20181231 |
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| CF01 | Termination of patent right due to non-payment of annual fee |