CN204285313U - A kind of convex lens for Down lamp luminous intensity distribution - Google Patents
A kind of convex lens for Down lamp luminous intensity distribution Download PDFInfo
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- CN204285313U CN204285313U CN201420795843.0U CN201420795843U CN204285313U CN 204285313 U CN204285313 U CN 204285313U CN 201420795843 U CN201420795843 U CN 201420795843U CN 204285313 U CN204285313 U CN 204285313U
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- Prior art keywords
- convex lens
- refractive curvature
- outgoing
- inequality
- luminous intensity
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- 239000000463 material Substances 0.000 claims abstract description 5
- 230000015572 biosynthetic process Effects 0.000 claims description 5
- 229920003229 poly(methyl methacrylate) Polymers 0.000 claims description 4
- 239000004926 polymethyl methacrylate Substances 0.000 claims description 4
- 238000002347 injection Methods 0.000 claims description 3
- 239000007924 injection Substances 0.000 claims description 3
- 230000004907 flux Effects 0.000 abstract description 10
- 239000012141 concentrate Substances 0.000 abstract 1
- 238000003466 welding Methods 0.000 abstract 1
- 238000005286 illumination Methods 0.000 description 8
- 230000007547 defect Effects 0.000 description 4
- 238000005516 engineering process Methods 0.000 description 3
- 230000005540 biological transmission Effects 0.000 description 2
- 230000001678 irradiating effect Effects 0.000 description 2
- 239000000203 mixture Substances 0.000 description 2
- 238000002834 transmittance Methods 0.000 description 2
- 230000009286 beneficial effect Effects 0.000 description 1
- 230000007812 deficiency Effects 0.000 description 1
- 239000003595 mist Substances 0.000 description 1
- 239000000243 solution Substances 0.000 description 1
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- Non-Portable Lighting Devices Or Systems Thereof (AREA)
Abstract
A kind of convex lens for Down lamp luminous intensity distribution that the utility model relates to, comprise incident refractive curvature and outgoing refraction is bent, and incident refractive curvature is inner concave shape, and incident refractive curvature is a part for ellipsoid, and it is positioned at the bottom of convex lens; Outgoing refractive curvature is male type, and outgoing plane of refraction is a paraboloidal part, and it is positioned at the top of convex lens; A retainer ring is had in the outer ring, bottom of convex lens.The utility model object is to provide that a kind of efficiency is high, cost is low, have the convex lens of Down lamp light-configuration mode, it can realize the luminous intensity distribution of lens to multiple low-power LED light source, and go for COB light source, there is stronger versatility, facilitate model change; Its join use with plurality of LEDs light source time, when light source concentrates welding, the minimizing materials'use amount that these convex lens can be tried one's best, reduces light fixture cost; It can be more accurate relative to diffuser plate control distribution curve flux, the Luminaire efficiency of whole lamp can be improved.
Description
Technical field
The utility model relates to lighting technical field, particularly a kind of lens for LED down luminous intensity distribution.
Background technology
Current LED down is generally applied to basis illumination, so its scope of irradiating is larger, so light distribution angle is also larger, so most Down lamp all adopts add one piece of diffuser plate at the light-emitting window of light fixture, to reach the object of Uniform Illumination on a large scale, and Down lamp generally adopts the LED of many middle low powers as light source, if all join lens to each LEDs light source to carry out luminous intensity distribution, many lenslet composition lens modules will be needed, can cost be increased so undoubtedly.So current LED down adopts diffuser plate to carry out secondary light-distribution to light source and seems to become optimal case.But adopting diffuser plate to carry out luminous intensity distribution but has these points defect:
One in order to reach the object of Uniform Illumination and reduction light-source brightness, the mist degree of diffuser plate is general all larger, but this makes the light transmittance of diffuser plate all very low, so cause the Luminaire efficiency of whole lamp on the low side, in order to make up this defect, some Down lamps can adopt reflective sheeting, to improve Luminaire efficiency, but can increase the cost of whole light fixture like this.
Two reasons because adding diffusant in diffuser plate, light is after diffuser plate, can spread toward all directions, form diffuse transmission, the direction of beam projecting has toward all directions, so in wide-angle direction, and also can be larger from diffuser plate diffuse transmission light out, so in the illumination application of reality, can dazzle be caused in the direction of wide-angle.As shown in Figure 1, for generally adopting the distribution curve flux of the Down lamp of diffuser plate, can find out that the beam intensity ratio in wide-angle direction is stronger.Part Down lamp in order to eliminate dazzle, and increases the structure of a shading, although can reach the object of anti-dazzle, reduces luminous flux.
Although after three employing diffuser plates, the object of plurality of LEDs light source being carried out to luminous intensity distribution just can be realized with one piece of diffuser plate, avoid the high cost scheme of the lens module adopting many lenslets compositions.Although in small-bore Down lamp, the price of one piece of diffuser plate is not high.But along with the increasing of Down lamp size, the radius of light-emitting window also increases, and the size of required diffuser plate also increases, and the cost of diffuser plate also improves thereupon.
Four adopt diffuser plate, although can reach the object of Uniform Illumination, diffuser plate accurately cannot control light, and the luminous intensity distribution formed is but not necessarily most effective, optimized light-configuration mode.，
As seen from the above analysis, although current LED down adopts diffuser plate to carry out luminous intensity distribution application widely, but still the place having many defects and have much room for improvement.
Utility model content
The purpose of this utility model is the deficiency overcome existing for prior art, diffuser plate is adopted to carry out luminous intensity distribution for current LED down, and cause Luminaire efficiency on the low side, dazzle cannot to be eliminated in wide-angle direction, to defects such as luminous intensity distribution cannot accurately control, provide that a kind of efficiency is high, cost is low, have the convex lens of Down lamp light-configuration mode.
In order to solve the problems of the technologies described above, the utility model is achieved through the following technical solutions:
For convex lens for Down lamp luminous intensity distribution, comprise incident refractive curvature, outgoing refractive curvature, it is characterized in that: described incident refractive curvature is inner concave shape, incident refractive curvature is a part for ellipsoid, and it is positioned at the bottom of described convex lens; Described outgoing refractive curvature is male type, and outgoing plane of refraction is a paraboloidal part, and it is positioned at the top of described convex lens; The concave lens body of a thick middle thin edge is formed between incident refractive curvature and outgoing plane of refraction.
With convex lens longitudinal cross-section for plane, with convex lens bottom centre for initial point sets up the rectangular co-ordinate of abscissa x and ordinate y;
Described incident refractive curvature is indulged the incidence curves cutting formation and is met following equation:
X
2/ a
2+ (y+m)
2/ b
2=1, a, b, m meet following three inequality:
Inequality 1:0<m<b,
Inequality 2:b-m>h,
Inequality 3:a
2-a
2m
2/ b
2>R
2
Wherein: h joins by convex lens the height of LED light source, and R is the radius in convex lens institute's luminous intensity distribution source;
Described outgoing refractive curvature is indulged the outgoing curve cutting formation and is met following equation:
X
2=-4p (y-g), p and g meet following two inequality:
Inequality 4:g>h,
Inequality 5:4pg> a
2-a
2m
2/ b
2,
Wherein, p is the half of this its focal point to directrix distance, and g is the height of whole convex lens.
Wherein, p, g, when meeting as upper inequality, can select according to the required size of lens and distribution curve flux.
Further, convex lens bottom sides has the retainer ring of integrative-structure.
Further, convex lens are rotationally symmetric body.
Further, convex lens adopt the integrative-structure of polymethyl methacrylate (PMMA) material injection.
Further, incident refractive curvature is frosting.
Compared with prior art, the beneficial effects of the utility model have following some:
1, convex lens are rotationally symmetric body, and incident refractive curvature is a part for ellipsoid, outgoing plane of refraction is a paraboloidal part, the concavo-convex doublet lens of gradual change is incident, exit surface coordinates, the utility model is made to realize the luminous intensity distribution of lens to multiple low-power LED light source, and go for COB light source, there is stronger versatility, facilitate model change; And join use with plurality of LEDs light source time, multiple light source can be concentrated and weld and be contained in the bottom position of indent, prepare separately relative to single source the minimizing materials'use amount can tried one's best for lens, reduce light fixture cost.
2, convex lens are rotationally symmetric body, and incident refractive curvature is a part for ellipsoid, outgoing plane of refraction is a paraboloidal part, the concavo-convex doublet lens surface engagement of gradual change, make the control distribution curve flux that the utility model can be more accurate relative to diffuser plate, not only can realize Uniform Illumination when adopting diffuser plate, reduce the dazzle in wide-angle direction simultaneously; And its light transmittance is higher, the Luminaire efficiency of whole lamp can be improved.
3, convex lens are rotationally symmetric body, the integrative-structure that convex lens adopt polymethyl methacrylate materials injection molded, and easy to make, cost is low.
Accompanying drawing explanation
Fig. 1 is the distribution curve flux that general LED down adopts the Down lamp of diffuser plate;
Fig. 2 is side view of the present utility model;
Fig. 3 is front view of the present utility model;
Fig. 4 is the sectional view of convex lens of the present utility model;
Fig. 5 is the distribution curve flux adopting Down lamp of the present utility model.
Detailed description of the invention
Below in conjunction with the drawings and specific embodiments, the utility model is described in further detail, but is not the restriction to the utility model structure.
Refer to Fig. 4, it is the sectional view of convex lens of the present utility model.Convex lens 1 described in the utility model, comprise the incident refractive curvature 12 of inner concave shape be positioned at bottom convex lens 1 and the male type outgoing refractive curvature 11 being positioned at convex lens 1 top, between incident refractive curvature 12 and outgoing plane of refraction 11, form the concave lens body of a thick middle thin edge.
Convex lens 1 are rotationally symmetric body, and its rotating shaft is Z axis, and retainer ring 13 is positioned at the bottom sides of convex lens 1.Incident refractive curvature 12 is a part for ellipsoid, as shown in Figure 4, with convex lens longitudinal cross-section for plane, with convex lens bottom centre 0 for initial point, sets up the rectangular co-ordinate of abscissa x and ordinate y;
Incident refractive curvature is indulged the incidence curves cutting formation and is met following equation: x
2/ a
2+ (y+m)
2/ b
2=1, wherein, a, b, m meet following three inequality:
Inequality 1:0<m<b,
Inequality 2:b-m>h,
Inequality 3:a
2-a
2m
2/ b
2>R
2.
Wherein: h joins by convex lens the height of LED light source, and R is the radius in convex lens institute's luminous intensity distribution source,
Wherein a, b, m are when meeting as upper inequality, can select according to the required size of lens and distribution curve flux.
Described outgoing plane of refraction 11 is a paraboloidal part, and the vertical outgoing curve formed that cuts of outgoing refractive curvature 11 meets following equation: x
2=-4p (y-g),
Wherein, p and g meets following two inequality:
Inequality 4:g>h,
Inequality 5:4pg> a
2-a
2m
2/ b
2,
Wherein, p is the half of this its focal point to directrix distance, and g is the height of whole convex lens.
Wherein, p, g, when meeting as upper inequality, can select according to the required size of lens and distribution curve flux.
Refer to Fig. 2 and Fig. 3, incident refractive curvature 12 and outgoing refractive curvature 11 form around the rotation of central shaft Z axis for being distributed as its bus.
Refer to Fig. 5, for adopting the distribution curve flux after the utility model, contrast adopts the luminous intensity distribution (consulting Fig. 1) of the LED down of diffuser plate luminous intensity distribution, can find out, adopt concavo-convex aspheric entry, outgoing curved surface, it achieves large-scale Uniform Illumination equally, the light intensity in wide-angle direction will reduce simultaneously, reduce the dazzle in this direction, control the luminous intensity distribution in wide-angle direction toward irradiating below simultaneously, to improve the brightness value on ground, simultaneously when the low dazzle value in guarantee wide-angle direction, ensure the light intensity value that wide-angle direction is certain simultaneously, to ensure the illumination of vertical plane.
The utility model is not limited to above-mentioned embodiment, if do not depart from spirit and scope of the present utility model to various change of the present utility model or distortion, if these are changed and distortion belongs within claim of the present utility model and equivalent technologies scope, then intention of the present utility model also comprises these changes and distortion.
Claims (7)
1. for convex lens for Down lamp luminous intensity distribution, comprise incident refractive curvature, outgoing refractive curvature, it is characterized in that: described incident refractive curvature is inner concave shape, incident refractive curvature is a part for ellipsoid, and it is positioned at the bottom of described convex lens; Described outgoing refractive curvature is male type, and outgoing plane of refraction is a paraboloidal part, and it is positioned at the top of described convex lens; The concave lens body of a thick middle thin edge is formed between incident refractive curvature and outgoing plane of refraction.
2. convex lens according to claim 1, is characterized in that: with convex lens longitudinal cross-section for plane, with convex lens bottom centre for initial point sets up the rectangular co-ordinate of abscissa x and ordinate y;
Described incident refractive curvature is indulged the incidence curves cutting formation and is met following equation:
X
2/ a
2+ (y+m)
2/ b
2=1, a, b, m meet following three inequality:
Inequality 1:0<m<b,
Inequality 2:b-m>h,
Inequality 3:a
2-a
2m
2/ b
2>R
2
Wherein: h joins by convex lens the height of LED light source, and R is the radius in convex lens institute's luminous intensity distribution source.
3. convex lens according to claim 2, is characterized in that: with convex lens longitudinal cross-section for plane, with convex lens bottom centre for initial point sets up the rectangular co-ordinate of abscissa x and ordinate y;
Described outgoing refractive curvature is indulged the outgoing curve cutting formation and is met following equation:
X
2=-4p (y-g), p and g meet following two inequality:
Inequality 4:g>h,
Inequality 5:4pg> a
2-a
2m
2/ b
2,
Wherein, p is the half of this its focal point to directrix distance, and g is the height of whole convex lens.
4. convex lens according to claim 1, is characterized in that: described convex lens bottom sides has the retainer ring of integrative-structure.
5. a kind of convex lens for Down lamp luminous intensity distribution according to claim 1 or 4, is characterized in that: described convex lens are rotationally symmetric body.
6. convex lens according to claim 5, is characterized in that: the integrative-structure that described convex lens adopt polymethyl methacrylate materials injection molded.
7. convex lens according to claim 1, is characterized in that: described incident refractive curvature is frosting.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201420795843.0U CN204285313U (en) | 2014-12-17 | 2014-12-17 | A kind of convex lens for Down lamp luminous intensity distribution |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201420795843.0U CN204285313U (en) | 2014-12-17 | 2014-12-17 | A kind of convex lens for Down lamp luminous intensity distribution |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN204285313U true CN204285313U (en) | 2015-04-22 |
Family
ID=52868467
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201420795843.0U Expired - Fee Related CN204285313U (en) | 2014-12-17 | 2014-12-17 | A kind of convex lens for Down lamp luminous intensity distribution |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN204285313U (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104456420A (en) * | 2014-12-17 | 2015-03-25 | 江门市天加力照明有限公司 | Convex lens used for down lamp light distribution |
-
2014
- 2014-12-17 CN CN201420795843.0U patent/CN204285313U/en not_active Expired - Fee Related
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104456420A (en) * | 2014-12-17 | 2015-03-25 | 江门市天加力照明有限公司 | Convex lens used for down lamp light distribution |
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|---|---|---|---|
| GR01 | Patent grant | ||
| CF01 | Termination of patent right due to non-payment of annual fee |
Granted publication date: 20150422 |
|
| CF01 | Termination of patent right due to non-payment of annual fee |