CN201661987U - Non-imaging uniform light distribution lens - Google Patents
Non-imaging uniform light distribution lens Download PDFInfo
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- CN201661987U CN201661987U CN2009202716824U CN200920271682U CN201661987U CN 201661987 U CN201661987 U CN 201661987U CN 2009202716824 U CN2009202716824 U CN 2009202716824U CN 200920271682 U CN200920271682 U CN 200920271682U CN 201661987 U CN201661987 U CN 201661987U
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- lens
- luminous intensity
- intensity distribution
- light distribution
- uniform light
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- 230000003287 optical effect Effects 0.000 claims abstract description 28
- 150000001875 compounds Chemical class 0.000 claims description 12
- 239000011521 glass Substances 0.000 claims description 3
- 238000005286 illumination Methods 0.000 abstract description 39
- 238000000034 method Methods 0.000 description 3
- 238000010586 diagram Methods 0.000 description 2
- 238000007598 dipping method Methods 0.000 description 2
- 230000004907 flux Effects 0.000 description 2
- 230000008569 process Effects 0.000 description 2
- 230000002238 attenuated effect Effects 0.000 description 1
- 230000005540 biological transmission Effects 0.000 description 1
- 230000008859 change Effects 0.000 description 1
- 238000012938 design process Methods 0.000 description 1
- 238000005516 engineering process Methods 0.000 description 1
- 230000003760 hair shine Effects 0.000 description 1
- 230000006872 improvement Effects 0.000 description 1
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- WFKWXMTUELFFGS-UHFFFAOYSA-N tungsten Chemical compound [W] WFKWXMTUELFFGS-UHFFFAOYSA-N 0.000 description 1
- 229910052721 tungsten Inorganic materials 0.000 description 1
- 239000010937 tungsten Substances 0.000 description 1
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Abstract
A non-imaging uniform light distribution lens is provided with a main optical axis, the lens comprises an incident surface and an emergent surface which are respectively arranged at two ends of the lens, a plurality of light distribution surfaces which are curved surfaces or planar shapes are distributed on the emergent surface, the plurality of light distribution surfaces are rotationally symmetrical relative to the main optical axis, and the plurality of light distribution surfaces are mutually connected to form a light distribution surface group. The utility model discloses a non-imaging optical design realizes even grading, makes light illumination even at certain angle within range.
Description
Technical field
The utility model relates to a kind of non-imaging optical system design, especially relates to a kind of non-imaging len that can realize uniform light distribution.
Background technology
Because the propagation characteristic of light, when the ray cast that spot light sends shines the surface to the quilt in the limited distance, its illumination can decay with the increase of the angle of emergence, therefore, we can seen a light source image very clearly according to the center on surface, the projection of countless light sources is in fact also arranged at the fringe region that light reached, only be exaggerated and attenuated, Here it is when people use incandescent lighting, understand the reason of seeing a very bright tungsten filament hot spot clearly on wall or floor, therefore, its Illumination Distribution of the spot light on the ordinary meaning is uneven.
Led light source has been compared many advantages with conventional light source, this has become people's common recognition, but the led chip volume is little, compact conformation, its light-emitting area is littler comparatively speaking, it is a kind of Lambertian source of approximate 180 degree bright dippings, and its light distribution is directly proportional with the bright dipping cosine of an angle, that is the light that led light source sent is being shone formed illumination decay rapidly with the increase of the angle of emergence on the surface.Obviously such light source characteristic is the actual demand that is difficult to satisfy outdoor various lighting uses, also can occur the projection of tangible highlighted LED shape because center illumination is the highest indoor.Therefore we must carry out the secondary optics design at the characteristic of led light source according to different application scenarios and demand, thereby realize the light that led chip sent is carried out shaping and change, especially the situation of light distribution.Such secondary optics design process belongs to the category that nonimaging optics designs, and on the ordinary meaning, the correct transmission of image information is concerned about in the imaging optical system design, and what the non-imaging optical system design then was concerned about is the utilization and the light distribution control of energy of light source.Therefore, can make the LED illuminator realized that according to the surface desired light distributes by the non-imaging optical system design.
The utility model content
The purpose of this utility model is: a kind of non-imaging uniform light distribution lens is provided, by the nonimaging optics design, realizes uniform light distribution, make light illumination in certain angular range even.
The purpose of this utility model is achieved in that
A kind of non-imaging uniform light distribution lens, has a primary optical axis, these lens comprise a plane of incidence and an exit facet of being located at these lens two ends respectively, be distributed with the luminous intensity distribution face that several are curved surface or flat shape on the described exit facet, these several luminous intensity distribution faces are with respect to primary optical axis rotation symmetry, and described several luminous intensity distribution faces are connected with each other and form a luminous intensity distribution face group.
By on exit facet, being provided with respect to the rotational symmetric luminous intensity distribution face of primary optical axis, some luminous intensity distribution faces are connected with each other and form luminous intensity distribution face group, then can reach uniform light distribution by the luminous intensity distribution face being carried out the nonimaging optics design, and light uniform purpose of illumination in certain angular range.
As the improvement of technique scheme, further technical scheme of the present utility model is as follows:
Above-mentioned luminous intensity distribution face group further comprises near the near axis area of primary optical axis with away from the remote axis area territory of primary optical axis, described near axis area is a compound convex surface of being made up of the luminous intensity distribution face of some different curvature, intersection curvature near axis area and remote axis area territory rises suddenly, and the linear marginal portion that extends to this luminous intensity distribution face group remote axis area territory, in the marginal portion in this remote axis area territory a compound concave surface or a convex surface of forming by the luminous intensity distribution face of some different curvature; Described exit facet integral body is nearly cup-shaped, at the bottom of the primary optical axis of lens is positioned at glass, and the described near axis area projection that is the center with the primary optical axis at the bottom of the cup.
The key point that realizes the utility model purpose is that the zonal ray that light source center illumination is concentrated is distributed to the marginal portion, with the compensation more weak zone of illumination, edge, simultaneously, eliminate the hot spot of central area, therefore, at near axis area the one compound convex surface of being made up of the luminous intensity distribution face of some different curvature is set, to realize above-mentioned purpose, because edge illumination a little less than, therefore, the linear luminous intensity distribution face that is that a linearity extends to the marginal portion is set in the remote axis area territory, passes through to guarantee the rim ray rule, do not have too much illumination loss, guaranteeing that simultaneously illumination is even, a compound concave surface of being made up of the luminous intensity distribution face of some different curvature is set in the marginal portion in remote axis area territory, is in order to collect the light of plane of incidence reflection, and the curvature setting by the luminous intensity distribution face, be refracted to the more weak zone of illumination by compound concave surface.Even in order to guarantee circumferential illumination, several luminous intensity distribution faces are symmetrical arranged with respect to the primary optical axis rotation.
The center of the above-mentioned plane of incidence is provided with the room of a ccontaining light source.
It is for built-in light source that room is set, and provides possibility in the lens for light source is encapsulated in.
Above-mentioned light source is LED.
The led light source volume is less, and the life-span is long, is fit to be encapsulated in the lens.
Above-mentioned lens are round lens.
Round lens is optimal secondary light-distribution lens, can be good at guaranteeing even non-joining of circumferential illumination, and easy to process.
Above-mentioned lens are regular polygon lens.
Need to obtain the specific light spot shape that meets the illumination needs in some cases, therefore, lens need be designed to regular polygon.
Above-mentioned lens are square lens.
Square lens has more under many circumstances to be used, and is a difficult problem but design the uniform square lens of luminous intensity distribution always, utilizes structure of the present utility model, can be easy to design the square lens of function admirable.
The luminous intensity distribution face connecting portion rounding off of above-mentioned regular polygon lens.The luminous intensity distribution face connecting portion rounding off of above-mentioned square lens.
The luminous intensity distribution face connecting portion of polygon lens is bigger to the even distribution influence of illumination, therefore, need handle the connecting portion rounding off, to improve the uniformity of Illumination Distribution.
Description of drawings
Fig. 1 is the exit facet structural representation of the utility model embodiment 1;
Fig. 2 is the plane of incidence structural representation of the utility model embodiment 1;
Fig. 3 is the exit facet structural representation of the utility model embodiment 2;
Fig. 4 is the plane of incidence structural representation of the utility model embodiment 2;
Fig. 5 is a profile of the present utility model;
Fig. 6 is the distribution curve flux figure of led light source;
Fig. 7 is the Illumination Distribution figure of led light source;
Fig. 8 is the Illumination Distribution figure of the utility model embodiment 1;
Fig. 9 is the Illumination Distribution figure of the utility model embodiment 2;
Figure 10 is a light path schematic diagram of the present utility model.
The specific embodiment
Embodiment 1:
Present embodiment is the embodiment of round lens, Fig. 1 is the exit facet structural representation of present embodiment, as can be seen from the figure, be distributed with the luminous intensity distribution face 1-1 that several are curve form on the exit facet, this several luminous intensity distribution face 1-1 is with respect to primary optical axis 1 rotation symmetry, and several luminous intensity distribution faces 1-1 is connected with each other and forms a luminous intensity distribution face group.
By on exit facet, being provided with respect to primary optical axis 1 rotational symmetric luminous intensity distribution face 1-1, some luminous intensity distribution face 1-1 are connected with each other and form luminous intensity distribution face group, then can reach uniform light distribution by luminous intensity distribution face 1-1 being carried out the nonimaging optics design, and light uniform purpose of illumination in certain angular range.
Fig. 5 is a profile of the present utility model, as can be seen from the figure, luminous intensity distribution face group further comprises near the near axis area a of primary optical axis 1 with away from the remote axis area territory b of primary optical axis, near axis area a is a compound convex surface of being made up of the luminous intensity distribution face 1-1 of some different curvature, intersection curvature near axis area a and remote axis area territory b rises suddenly, and the linear marginal portion c that extends to this luminous intensity distribution face group remote axis area territory b, be a compound concave surface of forming by the luminous intensity distribution face 1-1 of some different curvature at the marginal portion c of this remote axis area territory b; Exit facet integral body is nearly cup-shaped, and at the bottom of the primary optical axis 1 of lens was positioned at glass, near axis area a was with primary optical axis 1 projection that is the center at the bottom of the cup.
The key point that realizes the utility model purpose is that the zonal ray that light source center illumination is concentrated is distributed to the marginal portion, with the compensation more weak zone of illumination, edge, simultaneously, eliminate the hot spot of central area, therefore, at near axis area a the one compound convex surface of being made up of the luminous intensity distribution face 1-1 of some different curvature is set, to realize above-mentioned purpose, because edge illumination a little less than, therefore, the linear luminous intensity distribution face 1-1 that is that one linearity extends to the marginal portion is set, passes through to guarantee the rim ray rule at remote axis area territory b, do not have too much illumination loss, guaranteeing that simultaneously illumination is even, at the marginal portion c of remote axis area territory b the one compound concave surface of being made up of the luminous intensity distribution face 1-1 of some different curvature is set, is in order to collect the light of plane of incidence reflection, and the curvature setting by the luminous intensity distribution face, be refracted to the more weak zone of illumination by compound concave surface.Even in order to guarantee circumferential illumination, several luminous intensity distribution faces 1-1 is symmetrical arranged with respect to the primary optical axis rotation.
Fig. 2 is the plane of incidence structural representation of present embodiment, and as can be seen from the figure, the center of the plane of incidence is provided with the room 1-2 of a ccontaining light source.
It is for built-in light source that room 1-2 is set, and provides possibility in the lens for light source is encapsulated in.
The light source of present embodiment is LED, and the led light source volume is less, and the life-span is long, is fit to be encapsulated in the lens.
Round lens is optimal secondary light-distribution lens, can be good at guaranteeing even non-joining of circumferential illumination, and easy to process.
Fig. 6 is the distribution curve flux of led light source, and Fig. 7 is the Illumination Distribution figure of led light source, and as can be seen from the figure, led light source is very fast toward illumination decay all around from the center.
Fig. 8 is the Illumination Distribution figure of present embodiment, and as can be seen from the figure, by setting up the lens of present embodiment, illumination intensity of light source distributes and becomes even substantially.
Figure 10 is a light path schematic diagram of the present utility model, and as can be seen from the figure, light is through behind the lens, and the zonal ray that center illumination is concentrated is broken up, and is distributed to the more weak zone of edge illumination, thereby realizes the purpose of this utility model.
Embodiment 2:
Present embodiment is the embodiment of square lens.
Need to obtain the specific light spot shape that meets the illumination needs in some cases, therefore, lens need be designed to square.
Square lens have more under many circumstances to be used, and is a difficult problem but design the uniform square lens of luminous intensity distribution always, utilizes structure of the present utility model, can be easy to design the square lens of function admirable.
The structure basically identical of present embodiment and embodiment 1, Fig. 3 and Fig. 4 are the present embodiment plane of incidence and exit facet structural representation, and as can be seen from the figure, the exit facet of present embodiment also is made up of some luminous intensity distribution face 2-1, and the plane of incidence is provided with light source containing cavity 2-2.
Be with the difference of embodiment 1:
Because it is square that lens are designed to, therefore, adjacent luminous intensity distribution face 2-1 needs transition, because the luminous intensity distribution face connecting portion of polygon lens is bigger to the even distribution influence of illumination, therefore, present embodiment is handled the connecting portion rounding off, to improve the uniformity of Illumination Distribution.
Claims (9)
1. non-imaging uniform light distribution lens, has a primary optical axis, these lens comprise a plane of incidence and an exit facet of being located at these lens two ends respectively, it is characterized in that: be distributed with the luminous intensity distribution face that several are curved surface or flat shape on the described exit facet, these several luminous intensity distribution faces are with respect to primary optical axis rotation symmetry, and described several luminous intensity distribution faces are connected with each other and form a luminous intensity distribution face group.
2. a kind of non-imaging uniform light distribution lens according to claim 1, it is characterized in that: described luminous intensity distribution face group further comprises near the near axis area of primary optical axis with away from the remote axis area territory of primary optical axis, described near axis area is a compound convex surface of being made up of the luminous intensity distribution face of some different curvature, intersection curvature near axis area and remote axis area territory rises suddenly, and the linear marginal portion that extends to this luminous intensity distribution face group remote axis area territory, in the marginal portion in this remote axis area territory a compound concave surface or a convex surface of forming by the luminous intensity distribution face of some different curvature; Described exit facet integral body is nearly cup-shaped, at the bottom of the primary optical axis of lens is positioned at glass, and the described near axis area projection that is the center with the primary optical axis at the bottom of the cup.
3. a kind of non-imaging uniform light distribution lens according to claim 1 and 2, it is characterized in that: the center of the described plane of incidence is provided with the room of a ccontaining light source.
4. a kind of non-imaging uniform light distribution lens according to claim 3, it is characterized in that: described light source is LED.
5. a kind of non-imaging uniform light distribution lens according to claim 4, it is characterized in that: described lens are round lens.
6. a kind of non-imaging uniform light distribution lens according to claim 4, it is characterized in that: described lens are regular polygon lens.
7. a kind of non-imaging uniform light distribution lens according to claim 6, it is characterized in that: described lens are square lens.
8. a kind of non-imaging uniform light distribution lens according to claim 6 is characterized in that: the luminous intensity distribution face connecting portion rounding off of described regular polygon lens.
9. a kind of non-imaging uniform light distribution lens according to claim 7 is characterized in that: the luminous intensity distribution face connecting portion rounding off of described square lens.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2009202716824U CN201661987U (en) | 2009-11-30 | 2009-11-30 | Non-imaging uniform light distribution lens |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2009202716824U CN201661987U (en) | 2009-11-30 | 2009-11-30 | Non-imaging uniform light distribution lens |
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| Publication Number | Publication Date |
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| CN201661987U true CN201661987U (en) | 2010-12-01 |
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| CN2009202716824U Expired - Fee Related CN201661987U (en) | 2009-11-30 | 2009-11-30 | Non-imaging uniform light distribution lens |
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Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102401319A (en) * | 2011-11-25 | 2012-04-04 | 东莞市永兴电子科技有限公司 | Light emitting diode (LED) secondary optical lens |
| WO2012075913A1 (en) * | 2010-12-07 | 2012-06-14 | 深圳市金流明光电技术有限公司 | Led lamp |
| CN104696885A (en) * | 2015-03-26 | 2015-06-10 | 成都恒坤光电科技有限公司 | Novel secondary light distribution lens and novel secondary light distribution equipment for discrete LED (light emitting diode) light source |
| CN104763976A (en) * | 2015-03-26 | 2015-07-08 | 成都恒坤光电科技有限公司 | Multi-order secondary light distribution lens for dispersed LED (Light Emitting Diode) light source and equipment |
-
2009
- 2009-11-30 CN CN2009202716824U patent/CN201661987U/en not_active Expired - Fee Related
Cited By (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| WO2012075913A1 (en) * | 2010-12-07 | 2012-06-14 | 深圳市金流明光电技术有限公司 | Led lamp |
| CN102401319A (en) * | 2011-11-25 | 2012-04-04 | 东莞市永兴电子科技有限公司 | Light emitting diode (LED) secondary optical lens |
| CN104696885A (en) * | 2015-03-26 | 2015-06-10 | 成都恒坤光电科技有限公司 | Novel secondary light distribution lens and novel secondary light distribution equipment for discrete LED (light emitting diode) light source |
| CN104763976A (en) * | 2015-03-26 | 2015-07-08 | 成都恒坤光电科技有限公司 | Multi-order secondary light distribution lens for dispersed LED (Light Emitting Diode) light source and equipment |
| CN104763976B (en) * | 2015-03-26 | 2017-11-21 | 成都恒坤光电科技有限公司 | A kind of multistage secondary light-distribution lens and equipment for discrete LED sources |
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| Date | Code | Title | Description |
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| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| C17 | Cessation of patent right | ||
| CF01 | Termination of patent right due to non-payment of annual fee |
Granted publication date: 20101201 Termination date: 20121130 |