CN108692293A - A kind of LED free-form surface lens - Google Patents
A kind of LED free-form surface lens Download PDFInfo
- Publication number
- CN108692293A CN108692293A CN201810486375.1A CN201810486375A CN108692293A CN 108692293 A CN108692293 A CN 108692293A CN 201810486375 A CN201810486375 A CN 201810486375A CN 108692293 A CN108692293 A CN 108692293A
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- China
- Prior art keywords
- lens
- refraction
- plane
- led
- reflecting surface
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Classifications
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F21—LIGHTING
- F21V—FUNCTIONAL FEATURES OR DETAILS OF LIGHTING DEVICES OR SYSTEMS THEREOF; STRUCTURAL COMBINATIONS OF LIGHTING DEVICES WITH OTHER ARTICLES, NOT OTHERWISE PROVIDED FOR
- F21V5/00—Refractors for light sources
- F21V5/04—Refractors for light sources of lens shape
- F21V5/041—Ball lenses
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- Engineering & Computer Science (AREA)
- General Engineering & Computer Science (AREA)
- Led Device Packages (AREA)
Abstract
The invention discloses a kind of LED free-form surface lens, the lens (200) are made of several first reflectings surface (21) and several second planes of refraction (22);First reflecting surface (21) is set to the bottom of the lens (200), relatively described first reflecting surface (21) of second plane of refraction (22) is set to the top of the lens (200), first reflecting surface (21), which is enclosed, to be set to form reflecting surface cavity, second plane of refraction (22), which is enclosed, to be set to form plane of refraction cavity, and the reflecting surface cavity forms lens cavity with the plane of refraction cavity.The inner surface of the lens cavity is hemisphere face;Second plane of refraction (22) the smooth outer surface setting;Second plane of refraction (22) cross-sectional area is gradually reduced setting from bottom to up.The LED free-form surface lens of invention, can realize the Uniform Illumination of the petal restriction light type in far and near field three, and have higher efficiency and uniformity.
Description
Technical field
The present invention relates to optical field, more particularly to a kind of LED free-form surface lens.
Background technology
LED light source is generally lambertian distribution, and Uniform Illumination can not be realized with its direct illumination.Have to LED light-configuration modes
It is a variety of, form optical system using the reflector of design and lens etc..Wherein lens have spherical lens and free-form surface lens, phase
For spherical lens, free-form surface lens can preferably control the dispersion angle of light source, to preferably realize lighting requirement.
Current one kind LED free-form surface lens, the real target face of energy show light type and limit illumination, there is certain utilance,
But uniformity is not high, the reason is that it is plane of refraction that such lens, which are the free form surfaces directly designed, it cannot be more using single plane of refraction
The problem of lambertian distribution unevenness is eliminated well.
In addition a kind of lens realized light type and limit Uniform Illumination, utilize higher mathematics, establish Jie's partial differential equation
Lens are designed, such lens efficiency is higher, and far field uniformity is higher, but near-field uniform is bad, and the lens design
Method is complicated, and needs very high manufacture processing technology.
Invention content
It is an object of the invention to propose that a kind of LED free-form surface lens, the lens can realize the not similar shape of far and near field
Shape light type limits Uniform Illumination, and the efficiency of the lens is higher.
The technical solution adopted in the present invention:A kind of LED free-form surface lens, the lens (200) are anti-by several first
Penetrate face (21) and several second planes of refraction (22) composition;First reflecting surface (21) is set to the bottom of the lens (200),
Relatively described first reflecting surface (21) of second plane of refraction (22) is set to the top of the lens (200), and described first is anti-
It penetrates face (21) and encloses and set to form reflecting surface cavity, second plane of refraction (22), which is enclosed, to be set to form plane of refraction cavity, and the reflecting surface is empty
Chamber forms lens cavity with the plane of refraction cavity.
Preferably, the inner surface of the lens cavity is hemisphere face.
Preferably, the second plane of refraction (22) smooth outer surface setting.
Preferably, the second plane of refraction (22) cross-sectional area is gradually reduced setting from bottom to up.
Preferably, the first reflecting surface (21) smooth outer surface setting.
Preferably, the cross-sectional area of first reflecting surface (21) gradually increases setting from bottom to up.
Preferably, first reflecting surface (21) and the second plane of refraction (22) transition are smooth.
Preferably, lens (200) lower end is equipped with light source entrance;LED is equipped at lens (200) the inner surface center
Light source (100).
Preferably, the LED light source (100) is composed of LED chip (11) and PCB substrate (12).
Preferably, the lens (200) are PC parts or PMMA parts.
Compared with prior art, the beneficial effects of the invention are as follows:The LED free-form surface lens of the present invention, if passing through setting
Dry first reflecting surface and several second planes of refraction can realize the equal of the petal restriction light type in far and near field three in conjunction with LED light source
Even illumination, and have higher efficiency and uniformity, specifically, first catadioptric face and second plane of refraction combine structure
At lens outer surface, the light that LED light source is sent out is refracted to the first reflecting surface through inner surface of the lens, through the first reflecting surface again through second
Plane of refraction reflects, and realizes Uniform Illumination of different shapes, and can be according to the quantity of the first reflecting surface and several second planes of refraction
Difference realizes Uniform Illumination of different shapes.
Description of the drawings
Fig. 1 is the stereogram of the LED free-form surface lens of the present invention;
Fig. 2 is the side sectional view of the LED free-form surface lens entirety of the present invention;
Fig. 3 is the vertical view of the LED free-form surface lens of the present invention;
Fig. 4 is the upward view of the LED free-form surface lens of the present invention;
Fig. 5 is the front view of the LED free-form surface lens of the present invention;
Fig. 6 is the LED free-form surface lens beam projecting schematic diagrames of the present invention;
Fig. 7 is that the LED free-form surface lens of the present invention simulate the petal light type illumination figure of formation in software environment.
Reference numeral:LED light source (100), LED chip (11), PCB substrate (12), LED free-form surface lens (200), thoroughly
Mirror inner surface (1), lens outer surface (2), the first reflecting surface (21), the second plane of refraction (22).
Specific implementation mode
The technical solution further illustrated the present invention with reference to specific embodiment.
As shown in figs. 1-7, a kind of LED free-form surface lens, the lens (200) by several first reflectings surface (21) and if
Dry second plane of refraction (22) composition;First reflecting surface (21) is set to the bottom of the lens (200), second refraction
Relatively described first reflecting surface (21) in face (22) is set to the top of the lens (200), and first reflecting surface (21), which is enclosed, to be set
Reflecting surface cavity is formed, second plane of refraction (22), which is enclosed, to be set to form plane of refraction cavity, the reflecting surface cavity and the refraction
Face cavity forms lens cavity, and the internal face of the lens cavity is the inner surface of the lens (1).
In the specific technical solution of the present invention, the inner surface of the lens (1) is hemisphere face so that the LED light source
(100) when being reflected by the inner surface of the lens (1) with 180 degree angular light, the direction of incident light is not changed, such design is real
The light for having showed the whole angles of the collection LED light source (100), improves utilance.
Further, the second plane of refraction (22) smooth outer surface setting, the second plane of refraction (22) cross-sectional area
It is gradually reduced setting from bottom to up.The light that LED light source (100) Partial angle is sent out is rolled over through the inner surface of the lens (1)
It is reflected through first reflecting surface (21) after penetrating.First reflecting surface (21) the smooth outer surface setting, such design make
Wide-angle light after inner surface of the lens (1) freedom of entry toroidal lens first reflection it is inside, at least to a certain extent
Improve light type brightness.
Further, the cross-sectional area of first reflecting surface (21) gradually increases setting from bottom to up, and described first is anti-
It penetrates face (21) and the second plane of refraction (22) transition is smooth.Such design to occur when target face illumination spuious
Light, and then improve uniformity.First catadioptric face and second plane of refraction (22) are free form surface.The LED is certainly
It is composed of the first reflecting surface (21) and second plane of refraction (22) toroidal lens outer surface (2), preferably disappears as a result,
Except the influence of LED light source (100) lambertian distribution unevenness, the uniformity of illumination is improved.
Lens (200) lower end is equipped with light source entrance;LED light source is equipped at lens (200) the inner surface center
(100), the LED light source (100) is composed entirety by LED chip (11) and PCB substrate (12).LED light source (100) is sent out
Light enter from light source entrance, the light that LED light source (100) is sent out is refracted to the first reflecting surface (21) through inner surface of the lens (1), passes through
First reflecting surface (21) is reflected through the second plane of refraction (22) again, wherein first reflecting surface (21) and second plane of refraction
(22) quantity can need to change according to shape, such as when the number of first reflecting surface (21) and second plane of refraction (22)
When amount is four pieces, the Uniform Illumination of petal the restrictions light type in far and near field three can be realized, and have higher efficiency and uniform
Property, if Fig. 7 is to simulate the petal light type illumination figure of formation in software environment.The lens (200) be PC parts or PMMA parts,
Under the premise of ensureing LED lens transparency, the difficulty of processing of LED lens, and LED lens wearability and electric insulation are simplified
Property is improved.
The additional aspect and advantage of the present invention will be set forth in part in the description, and will partly become from the following description
Obviously, or practice through the invention is recognized.
Embodiment
Referring to Fig. 1 to Fig. 6, LED light source (100) and LED free-form surface lens (200) to the present invention carry out detailed
Description.
A kind of LED free-form surface lens, the lens (200) are by several first reflectings surface (21) and several second planes of refraction
(22) it forms;First reflecting surface (21) is set to the bottom of the lens (200), and second plane of refraction (22) is with respect to institute
The top that the first reflecting surface (21) is set to the lens (200) is stated, first reflecting surface (21), which is enclosed, to be set to form reflecting surface sky
Chamber, second plane of refraction (22), which is enclosed, to be set to form plane of refraction cavity, and the reflecting surface cavity is formed with the plane of refraction cavity
The internal face of mirror cavity, the lens cavity is the inner surface of the lens (1).
The LED light source (100) of the present embodiment, as shown in Figure 1, including:LED chip (11) and PCB substrate (12), institute
It states LED chip (11) to be located in PCB substrate (12), the LED chip (11) is combined into an entirety with PCB substrate (12).
It should be noted that:LED light source (100) is the light source illustrated with LED free-form surface lens (200) cooperation,
Middle LED light source (100) refers to the element of same or similar LED light source or similar element or similar functions.LED light source (100)
It can be rounded face light source or the area source of other shapes, be limited unless there are specific, and should not be understood as to the present invention's
Limitation.
LED free-form surface lens (200) according to the ... of the embodiment of the present invention, including inner surface of the lens (1) and lens outer surface
(2).Such as Fig. 1, Fig. 2, shown in Fig. 4, the inner surface of the lens (1) is hemisphere face so that the LED light source (100) is at 180 degree angle
Degree light reflects through the inner surface of the lens (1) but does not change the direction of incident light.Such setting has collected the LED light source
(100) light of whole angles, improves utilance.
As shown in Figures 1 to 6, the lens outer surface (2) is combined by the first reflecting surface (21) and the second plane of refraction (22)
It forms.Specifically, the first reflecting surface (21) its cross-sectional area gradually increases from bottom to up.Such design is so that by LED light source
(100) it is inside to send out the light of the wide-angle first reflection after inner surface of the lens (1) freedom of entry toroidal lens (200), at least
Light type brightness is improved to a certain extent.
Further, the first reflecting surface (21) smooth outer surface, the first reflecting surface (21) and second plane of refraction (22)
Transition is smooth so that when illuminating stray light will not occur for target face, and then improve uniformity.
Such as Fig. 5, shown in Fig. 6, the second plane of refraction (22) its cross-sectional area is gradually reduced from bottom to up, the second plane of refraction (22)
Smooth outer surface;LED free-form surface lens (200) outer surface (2) is by the first reflecting surface (21) and second plane of refraction (22)
It is composed, can preferably eliminate the influence of LED light source (100) lambertian distribution unevenness, improve the uniformity of illumination.
In some examples of the present invention, LED free-form surface lens (200) be PC (that is, makrolon) or PMMA (that is,
Polymethyl methacrylate).Under the premise of ensureing LED free-form surface lens (200) transparency, LED free form surfaces are simplified
The difficulty of processing of lens (200), and LED lens (200) wearability and electric insulating quality are improved.
Certainly, the material selection of LED free-form surface lens (200) is a kind of preferred embodiment in this example, if
Meter personnel can according to actual needs select the material of LED free-form surface lens (200).
For those skilled in the art, technical solution that can be as described above and design are made other each
Kind is corresponding to be changed and deforms, and all these change and deform the protection model that should all belong to the claims in the present invention
Within enclosing.
Claims (10)
1. a kind of LED free-form surface lens, it is characterised in that:The lens (200) are by several first reflectings surface (21) and several
Second plane of refraction (22) forms;First reflecting surface (21) is set to the bottom of the lens (200), second plane of refraction
(22) relatively described first reflecting surface (21) is set to the top of the lens (200), and first reflecting surface (21), which is enclosed, sets shape
At reflecting surface cavity, second plane of refraction (22), which is enclosed, to be set to form plane of refraction cavity, the reflecting surface cavity and the plane of refraction
Cavity forms lens cavity.
2. a kind of LED free-form surface lens according to claim 1, it is characterised in that:The inner surface of the lens cavity
For hemisphere face.
3. a kind of LED free-form surface lens according to claim 1, it is characterised in that:Second plane of refraction (22) is outside
The smooth setting in surface.
4. a kind of LED free-form surface lens according to claim 1, it is characterised in that:Second plane of refraction (22) is horizontal
Sectional area is gradually reduced setting from bottom to up.
5. a kind of LED free-form surface lens according to claim 1, it is characterised in that:First reflecting surface (21) is outside
The smooth setting in surface.
6. a kind of LED free-form surface lens according to claim 1, it is characterised in that:First reflecting surface (21)
Cross-sectional area gradually increases setting from bottom to up.
7. a kind of LED free-form surface lens according to claim 1, it is characterised in that:First reflecting surface (21) with
Second plane of refraction (22) transition is smooth.
8. a kind of LED free-form surface lens according to claim 1, it is characterised in that:Lens (200) lower end is equipped with
Light source entrance;LED light source (100) is equipped at lens (200) the inner surface center.
9. a kind of LED free-form surface lens according to claim 8, it is characterised in that:The LED light source (100) is by LED
Chip (11) is composed with PCB substrate (12).
10. a kind of LED free-form surface lens according to claim 1, it is characterised in that:The lens (200) are PC parts
Or PMMA parts.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201810486375.1A CN108692293A (en) | 2018-05-21 | 2018-05-21 | A kind of LED free-form surface lens |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201810486375.1A CN108692293A (en) | 2018-05-21 | 2018-05-21 | A kind of LED free-form surface lens |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN108692293A true CN108692293A (en) | 2018-10-23 |
Family
ID=63847609
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201810486375.1A Pending CN108692293A (en) | 2018-05-21 | 2018-05-21 | A kind of LED free-form surface lens |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN108692293A (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN111797445A (en) * | 2020-07-14 | 2020-10-20 | 深圳市千百辉照明工程有限公司 | Design method of LED flower-shaped lighting lens and lens |
Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| WO2012010796A1 (en) * | 2010-07-22 | 2012-01-26 | Holophane | Lens and lighting module using such a lens |
| CN103196040A (en) * | 2012-01-06 | 2013-07-10 | 扬升照明股份有限公司 | Lens structure, light source device and light source module |
| CN105444108A (en) * | 2015-12-30 | 2016-03-30 | 广州达森灯光股份有限公司 | Lamp capable of emitting multiple light beams |
| CN107076385A (en) * | 2014-10-29 | 2017-08-18 | 标致·雪铁龙汽车公司 | Vehicle head lamp |
-
2018
- 2018-05-21 CN CN201810486375.1A patent/CN108692293A/en active Pending
Patent Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| WO2012010796A1 (en) * | 2010-07-22 | 2012-01-26 | Holophane | Lens and lighting module using such a lens |
| CN103196040A (en) * | 2012-01-06 | 2013-07-10 | 扬升照明股份有限公司 | Lens structure, light source device and light source module |
| CN107076385A (en) * | 2014-10-29 | 2017-08-18 | 标致·雪铁龙汽车公司 | Vehicle head lamp |
| CN105444108A (en) * | 2015-12-30 | 2016-03-30 | 广州达森灯光股份有限公司 | Lamp capable of emitting multiple light beams |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN111797445A (en) * | 2020-07-14 | 2020-10-20 | 深圳市千百辉照明工程有限公司 | Design method of LED flower-shaped lighting lens and lens |
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Application publication date: 20181023 |