CN102901037B - Floodlight lens and LED (light-emitting diode) lamp with same - Google Patents
Floodlight lens and LED (light-emitting diode) lamp with same Download PDFInfo
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- CN102901037B CN102901037B CN201110213525.XA CN201110213525A CN102901037B CN 102901037 B CN102901037 B CN 102901037B CN 201110213525 A CN201110213525 A CN 201110213525A CN 102901037 B CN102901037 B CN 102901037B
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Abstract
The invention relates to a floodlight lens and an LED (light-emitting diode) lamp with the same. The floodlight lens is provided with a top end surface, a bottom end surface and a rotary side surface, wherein the bottom end surface is provided with a hemispherical concave surface; the middle of the top end surface is provided with a conical concave surface; the generating line of the rotary side surface is a fold line; and the fold line comprises three straight sections which are sequentially connected. The LED lamp is characterized by being provided with the floodlight lens. According to the invention, the bottom end surface of the floodlight lens is provided with the concave spherical surface, and the top end surface is provided with the conical concave surface; after a light ray from the LED light source, having a small light-emitting angle, is refracted by the concave spherical surface, the light-emitting angle is amplified for the first time; after the light ray is refracted by the conical concave surface on the top surface, the light-emitting angle is amplified for the second time; and after being amplified twice, the strong light ray of a part close to the axial line is diffused around, thereby solving the problem that the light intensity of the part close to the axial line of the LED light source is high. Thus, more uniform floodlight distribution can be realized.
Description
Technical field
The present invention relates to the light-distribution lens of lighting, more particularly, relate to a kind of flood lens and there is the LED light fixture of these lens.
Background technology
While 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 larger, but this part light can not pass through reflector luminous intensity distribution, and the floodlight that therefore reflector is allotted, always there will be the light intensity of mid portion higher.
In order to obtain floodlight luminous intensity distribution comparatively uniformly, also there are the concavees lens of employing to carry out luminous intensity distribution to LED light source, but the utilization rate of the luminous flux of this mode to LED light source is lower, show that the larger light of light emitting anger of LED light source cannot be utilized, finally cause the light efficiency utilization rate of light fixture too low.
In addition, also has a class floodlight total-reflection lens, to improve on the basis of the optically focused total reflection lens of LED light source, as shown in Figure 1, make densely covered netted small salient point or concave spherical surface structure and realize the effect of floodlight at the exit facet 1 of lens, also have and adopt exit facet frosted processing, the floodlight effect that these processing modes reach is all even not, floodlight angle is generally less, and due to the exit facet of frosting or class frosted, makes light loss.
Summary of the invention
The technical problem to be solved in the present invention is, for the above-mentioned defect of the flood lens of prior art, provides the flood lens that a kind of light distribution effect is good, light loss is little, and the lensed LED light fixture of tool.
One of object of the present invention is to provide a kind of flood lens, for the luminous intensity distribution of LED light source, it is characterized in that, described flood lens is revolving body, described flood lens has a top end face and a bottom face, and connects the revolution side of described top end face and bottom face;
Described bottom face is provided with hemispheric concave spherical surface, and the centre of sphere of described hemispheric concave spherical surface is positioned on the axis of described revolving body;
The middle part of described top end face is provided with conical concave surface, the axis of described conical concave surface and the dead in line of described revolving body;
Described revolution side is fully reflecting surface, and the bus of revolution side is broken line, and described broken line comprises three straightways that are connected successively;
If the angle of the axis of the bus of described concave surface and described revolving body is θ, the summit of concave surface is L to the distance of bottom face, the refractive index of the material of described flood lens is n, top end face is h to the distance of bottom face, and θ and L meet following relation: θ=90-α (η-1)/(n-1), L≤(1-tan α/tan θ) × h, wherein, 15 ° of α ≈, 2≤η≤2.1, η > n.
In flood lens of the present invention, described flood lens is made up of optical glass or optical plastic.
In flood lens of the present invention, the refractive index of described optical glass or optical plastic is greater than 1.45.
In flood lens of the present invention, described optical plastic is Merlon or polymethyl methacrylate.
In flood lens of the present invention, taking the center of described bottom face as initial point, taking the axis of revolving body as Z axis, taking the symmetry axis of bottom face as Y-axis, while setting up Descartes's rectangular coordinate system, the starting point coordinate of described bus is (0, d/2, 0), wherein d is greater than the diameter of described LED light source, every straightway of described bus and the angle of Z axis are 8～29 °, every straightway of described bus and the angle of Z axis are successively decreased by the sequence of positions of origin-to-destination at bus successively according to this straightway, the angle of the terminal of the starting point of every straightway of described bus and the line of initial point and this straightway and the line of initial point is 5～15 °.
In flood lens of the present invention, every straightway of described bus and the angle of Z axis are followed successively by 28.5 °, 18.5 °, 8.5 ° according to this straightway in the sequence of positions by origin-to-destination of described bus.
In flood lens of the present invention, the angle of the starting point of every straightway of described bus and the terminal of the line of initial point and this straightway and the line of initial point is 10 °.
In flood lens of the present invention, described d is than the large 3～5mm of the diameter of LED light source.
In flood lens of the present invention, on described revolution side, be provided with and increase anti-film.
Two of object of the present invention is to provide a kind of LED light fixture, at least comprise LED light source, and flood lens as previously discussed, described LED light source is just to the concave spherical surface on described flood lens bottom face, the optical axis of described LED light source and the dead in line of described flood lens.
Implement flood lens of the present invention and there is the LED light fixture of these lens, there is following beneficial effect: the bottom face of flood lens of the present invention is provided with concave spherical surface, top end face is provided with conical concave surface, the less light of the light emitting anger of LED light source is after concave spherical surface refraction, light emitting anger is amplified for the first time, after the conical concave surface refraction of end face, light emitting anger is amplified for the second time, amplify through secondary, spreading compared with high light alignment surrounding of axial ray part, the light that light emitting anger is larger is drawn close by the backward axis of revolution side total reflection, solve the larger problem of light intensity of the axial ray part of LED light source, can realize more uniform floodlight luminous intensity distribution.
Brief description of the drawings
Below in conjunction with drawings and Examples, the invention will be further described, in accompanying drawing:
Fig. 1 is the schematic diagram of the flood lens of prior art;
Fig. 2 is the schematic diagram of the preferred embodiment of flood lens of the present invention;
Fig. 3 is the schematic diagram of the end face of the preferred embodiment of flood lens of the present invention;
Fig. 4 is the cutaway view of the preferred embodiment of flood lens of the present invention;
Fig. 5 is the schematic diagram of the revolution side of the preferred embodiment of reflective total reflection lens of the present invention;
Fig. 6 is the light path schematic diagram of the luminous intensity distribution of flood lens of the present invention;
Fig. 7 is the light distribution effect schematic diagram of flood lens of the present invention.
Detailed description of the invention
Understand for technical characterictic of the present invention, object and effect being had more clearly, now contrast accompanying drawing and describe the specific embodiment of the present invention in detail.
As shown in Figures 2 to 5, be the schematic diagram of a preferred embodiment of flood lens of the present invention, this flood lens 10 is floodlight total-reflection lens, for the luminous intensity distribution of LED light source 30.As shown in the figure, this flood lens 10 is single-revolution body, and it is made up of transparent material, can be for example optical plastic or optical glass, the refractive index of transparent material be preferably greater than 1.45, in the present embodiment, this flood lens is made up of Merlon, is also PC material, and its refractive index is 1.59.
This flood lens 10 has a top end face 11 and a bottom face 12, and connects the revolution side 13 of top end face 11 and bottom face 12.
In the present embodiment, the bottom face 12 of flood lens 10 is provided with hemispheric concave spherical surface 121, the centre of sphere of this hemispheric concave spherical surface 121 is positioned on the axis that revolving body is also flood lens 10, concave spherical surface 121 is for arranging LED light source 30, and make the less light of LED light source 30 light emitting angers have certain diffusion, make the light intensity of mid portion be unlikely to concentrate very much; Be provided with conical concave surface 111 at the middle part of top end face 11, the axis of this conical concave surface 111 and revolving body are also the dead in line of flood lens 10; If the angle of the bus of this conical concave surface 111 and the axis of revolving body is θ, the summit of concave surface 111 is that vertex of a cone position is L to the distance of bottom face 12, the refractive index of the material of flood lens 10 is n, and top end face 11 is h to the distance of bottom face 12, and θ and L meet following relation:
θ＝90-α(η-1)/(n-1)， (1)
L≤(1-tanα/tanθ)×h， (2)
Wherein, 15 ° of α ≈, 2≤η≤2.1, η > n.
In the flood lens of the present embodiment, the revolution side 13 of flood lens 10 is fully reflecting surface, and the bus 14 of revolution side 13 is broken line, and this broken line comprises three straightways 21,22,23 that are connected successively.The parameter of bus 14 has following mode to determine, taking bottom face 12 center as initial point O, the axis that taking revolving body is flood lens 10 is Z axis, taking the symmetry axis of bottom face 12 as Y-axis, set up Descartes's rectangular coordinate system, the starting point coordinate of bus 14 is (0, d/2, 0), wherein d is greater than the diameter of described LED light source, every straightway of bus 14 and the angle of Z axis are 8～29 °, every straightway of bus 14 and the angle of Z axis are successively decreased by the sequence of positions of origin-to-destination at bus 14 successively according to this straightway, the angle of the terminal of the starting point of every straightway of described bus 14 and the line of initial point and this straightway and the line of initial point is 5～15 °.
Concrete, in the present embodiment, article three, straightway is followed successively by the first straightway 21, the second straightway 22, the 3rd straightway 23, as shown in Figure 5, the starting point of bus 14, also the starting point coordinate of the first straightway 21 is (0, d/2,0), in the present embodiment, d=8mm, the diameter of the LED light source 30 coordinating with the flood lens 10 of the present embodiment is not more than 5mm, and here, the diameter of LED light source 30 refers to the diameter of the light-emitting area 31 of LED light source 30, d is advisable with the diameter 3～5mm that is greater than LDE light source 30, unsuitable excessive.
In the present embodiment, the angle of the terminal of the starting point of every straightway of bus 14 and the line of initial point and this straightway and the line of initial point is 10 °, the first straightway 21 is 28.5 ° with the angle of Z axis, the second straightway 22 is 18.5 ° with the angle of Z axis, and the 3rd straightway 23 is 8.5 ° with Z axis angle.By the angle of starting point, first starting point of straightway 21 and the terminal of the line of initial point and this straightway and the line of initial point and the angle of the first straightway 21 and Z axis of the first straightway 21, these three parameters are decided the coordinate of the terminal that can determine the first straightway 21, also determined the coordinate of the starting point of the second straightway 22, the like can determine starting point and the terminal of every straightway, also determine Down Highway 14, bus 14 rotates a circle and can obtain turning round side 13 around Z axis.Can be determined the shape of flood lens 10 by above-mentioned parameter.In order further to improve the utilization rate of light, can on revolution side 13, plating increase anti-film, to improve the efficiency of reflection.
Both the parameter that can have been determined flood lens by above parameter, the parameter of the preferred embodiment of the flood lens of the present embodiment is as follows:
The diameter of concave spherical surface 121: 5mm;
The diameter d of the bottom face 12 of flood lens 10: 8mm;
The bus of conical concave surface 111 and the angle theta of axis: 65 °;
The summit of conical concave surface 111 is to the distance L of end face 12: 2.4mm;
Top end face 11 is to the distance h of bottom face 12: 3mm
The diameter of top end face 11: 10mm;
Can be found out by above parameter, the institute of this flood lens 10 takes up space and is 10mm × 10mm × 3mm to the maximum, and volume is very little.
Fig. 6 shows the light path schematic diagram of the luminous intensity distribution of flood lens 10 of the present invention, when entering lens by concave spherical surface 121, the light of the part of the axis of close LED light source 30 there is refraction for the first time, then penetrated after refraction for the second time by conical concave surface 111, after twice refraction, the angle of light and axis is exaggerated; While entering lens with the light of the slightly large part of the axis angle of LED light source 30 by concave spherical surface 121, there is refraction for the first time, then penetrated after refraction for the second time by the planar section of top end face 11, after twice refraction, the angle of this part light and axis is also exaggerated; When entering lens by concave spherical surface 121, the light that further departs from the axis portion of LED light source 30 there is refraction for the first time, then directive revolution side 13, there is total reflection on revolution side 13 after, directive top end face 11 penetrates after refraction for the second time, this part light is after experiencing refraction for the first time, total reflection, refraction for the second time, and light is by penetrating and change into penetrating to offside to axis one side direction; Above-mentioned three part light are interleaved mode and penetrate after flood lens, because stronger light and angle axis of the close axis portion of LED light source 30 is exaggerated, spreading compared with high light alignment surrounding of axial ray part, and intersect and mix with the light in other regions, so just can obtain good Architecture Floodlighting, and the light sending due to LED light source 30 regionals can be fully utilized, and has improved the utilization ratio of light.As shown in Figure 7, as seen from the figure, in light emitting anger is the scope of 100 °, uniformity of illuminance is very high for the light distribution effect of flood lens 10 of the present invention.
The present invention is except providing above-mentioned flood lens, a kind of LED light fixture is also provided, and this LED light fixture at least comprises LED light source 30, and flood lens 10, LED light source 30 is just to the concave spherical surface 121 on the bottom face 12 of flood lens 10, the dead in line of the optical axis of LED light source 20 and flood lens 10.The preferred light emitting anger of LED light source 30 is the LED light source between 110 °-130 °, and the luminescence chip of LED light source 30 flushes with the bottom face 12 of flood lens 10, and the spherical light-emitting area 31 of LED light source 30 extend in concave spherical surface 121.
The bottom face of flood lens of the present invention is provided with concave spherical surface, top end face is provided with conical concave surface, the less light of the light emitting anger of LED light source is after concave spherical surface refraction, light emitting anger is amplified for the first time, after the conical concave surface refraction of end face, light emitting anger is amplified for the second time, amplify through secondary, spreading compared with high light alignment surrounding of axial ray part, the light that light emitting anger is larger is drawn close by the backward axis of revolution side total reflection, the larger problem of light intensity that has solved the axial ray part of LED light source, can realize more uniform floodlight luminous intensity distribution.
By reference to the accompanying drawings embodiments of the invention are described above; but the present invention is not limited to above-mentioned detailed description of the invention; above-mentioned detailed description of the invention is only schematic; instead of restrictive; those of ordinary skill in the art is under enlightenment of the present invention; not departing from the scope situation that aim of the present invention and claim protect, also can make a lot of forms, within these all belong to protection of the present invention.
Claims (10)
1. a flood lens, for the luminous intensity distribution of LED light source, it is characterized in that, described flood lens (10) is revolving body, described flood lens (10) has a top end face (11) and a bottom face (12), and connects the revolution side (13) of described top end face (11) and bottom face (12);
Described bottom face (12) is provided with hemispheric concave spherical surface (121), and the centre of sphere of described hemispheric concave spherical surface (121) is positioned on the axis of described revolving body;
The middle part of described top end face (11) is provided with conical concave surface (111), the axis of described conical concave surface (111) and the dead in line of described revolving body;
Described revolution side (13) is fully reflecting surface, and the bus (14) of revolution side (13) is broken line, and described broken line comprises three straightways (21,22,23) that are connected successively;
If the angle of the bus of described concave surface (111) and the axis of described revolving body is θ, the summit of concave surface (111) is L to the distance of bottom face (12), the refractive index of the material of described flood lens (10) is n, top end face (11) is h to the distance of bottom face (12), θ and L meet following relation: θ=90 °-α (η-1)/(n-1), L≤(1-tan α/tan θ) × h, wherein, 15 ° of α ≈, 2≤η≤2.1, η > n.
2. flood lens according to claim 1, is characterized in that, described flood lens (10) is made up of optical glass or optical plastic.
3. flood lens according to claim 2, is characterized in that, the refractive index of described optical glass or optical plastic is greater than 1.45.
4. flood lens according to claim 2, is characterized in that, described optical plastic is Merlon or polymethyl methacrylate.
5. according to the flood lens described in claim 1 to 4 any one, it is characterized in that, taking the center of described bottom face (12) as initial point, taking the axis of revolving body as Z axis, taking the symmetry axis of bottom face (12) as Y-axis, while setting up Descartes's rectangular coordinate system, the starting point coordinate of described bus (14) is (0, d/2, 0), wherein d is greater than the diameter of described LED light source, every straightway of described bus (14) and the angle of Z axis are 8～29 °, every straightway of described bus (14) and the angle of Z axis are successively decreased by the sequence of positions of origin-to-destination at bus (14) successively according to this straightway, the angle of the starting point of every straightway of described bus (14) and the terminal of the line of initial point and this straightway and the line of initial point is 5～15 °.
6. flood lens according to claim 5, it is characterized in that, every straightway of described bus (14) and the angle of Z axis are followed successively by 28.5 °, 18.5 °, 8.5 ° according to this straightway in the sequence of positions by origin-to-destination of described bus (14).
7. flood lens according to claim 5, is characterized in that, the angle of the starting point of every straightway of described bus (14) and the terminal of the line of initial point and this straightway and the line of initial point is 10 °.
8. flood lens according to claim 5, is characterized in that, described d is than the large 3～5mm of the diameter of LED light source.
9. flood lens according to claim 5, is characterized in that, is provided with and increases anti-film on described revolution side (13).
10. a LED light fixture, it is characterized in that, at least comprise LED light source, and flood lens as described in claim 1 to 9 any one, described LED light source is just to concave spherical surface (121), the optical axis of described LED light source and the dead in line of described flood lens on described flood lens bottom face (12).
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201110213525.XA CN102901037B (en) | 2011-07-28 | 2011-07-28 | Floodlight lens and LED (light-emitting diode) lamp with same |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201110213525.XA CN102901037B (en) | 2011-07-28 | 2011-07-28 | Floodlight lens and LED (light-emitting diode) lamp with same |
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| Publication Number | Publication Date |
|---|---|
| CN102901037A CN102901037A (en) | 2013-01-30 |
| CN102901037B true CN102901037B (en) | 2014-09-17 |
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| Application Number | Title | Priority Date | Filing Date |
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| CN201110213525.XA Active CN102901037B (en) | 2011-07-28 | 2011-07-28 | Floodlight lens and LED (light-emitting diode) lamp with same |
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Families Citing this family (1)
| Publication number | Priority date | Publication date | Assignee | Title |
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| CN103383094B (en) * | 2013-08-13 | 2015-02-04 | 广东骑光车灯工业有限公司 | Free-form surface forming method for optical lens for light-emitting diode (LED) motorcycle head lamp |
Citations (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101487570A (en) * | 2005-03-07 | 2009-07-22 | 三洋电机株式会社 | Lighting device |
| CN101900294A (en) * | 2010-07-30 | 2010-12-01 | 海洋王照明科技股份有限公司 | Condensing lens and lamp using same |
Family Cites Families (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP4492193B2 (en) * | 2004-04-13 | 2010-06-30 | 岡谷電機産業株式会社 | Indicator lamp |
| TWI266079B (en) * | 2005-01-10 | 2006-11-11 | Shiu-Hua Huang | Steering lens and light emitting system using the same |
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Patent Citations (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101487570A (en) * | 2005-03-07 | 2009-07-22 | 三洋电机株式会社 | Lighting device |
| CN101900294A (en) * | 2010-07-30 | 2010-12-01 | 海洋王照明科技股份有限公司 | Condensing lens and lamp using same |
Non-Patent Citations (1)
| Title |
|---|
| JP特开2005-303046A 2005.10.27 |
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