CN104864361A - LED collimating lens - Google Patents
LED collimating lens Download PDFInfo
- Publication number
- CN104864361A CN104864361A CN201410059042.2A CN201410059042A CN104864361A CN 104864361 A CN104864361 A CN 104864361A CN 201410059042 A CN201410059042 A CN 201410059042A CN 104864361 A CN104864361 A CN 104864361A
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- China
- Prior art keywords
- led
- light
- output end
- free form
- collimation lens
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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
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- Engineering & Computer Science (AREA)
- General Engineering & Computer Science (AREA)
- Lenses (AREA)
Abstract
The invention discloses an LED collimating lens. The collimating lens comprises a bottom surface, free-form surfaces, light output end surfaces and side surfaces. The free-form surfaces are arranged on the top of the lens, so that light beam is subjected to total reflection to form collimated light beam, and a groove is arranged on the bottom. The LED collimating lens comprises more than two even number of free-form surfaces which are paraboloid or ellipsoid protruding from the top. The light output end surfaces, the side surfaces and the bottom are perpendicular to each other. The LED collimating lens has the advantages of simple structure, reasonable design, good collimating effect and high optical efficiency, solves the puzzle of the bi-direction collimating, four-direction collimating or more than four-direction even/odd-direction of collimating, and can be used for lighting situation in need of collimating light beam such as submarines.
Description
Technical field
The invention belongs to optical element, system or Instrument technology field, specifically refer to a kind of LED collimation lens.
Background technology
LED has the advantages such as energy-saving and environmental protection, long service life, reaction speed be fast relative to conventional illumination sources, and be considered to 21 century top quality light source, the exploitation of LED illumination product, development, production have become very tempting rising industry.
But, the traditional optical lens of most use are as cylindrical mirror or spherical mirror etc., their exiting surface generally adopts a smooth flat or smooth surface, they are larger to the rising angle of LED, illumination range is comparatively wide, and in actual illumination, most of place needs illumination range little but the illumination spot that light is concentrated, brightness is high.In these cases, if directly use conventional lenses, then the waste even light pollution that a part of light may be caused to be irradiated to cause luminous energy outside required field of illumination, also makes required surround intraoral illumination intensity obviously inadequate simultaneously, affects radiation response.Therefore, be necessary to carry out collimation design to LED.But LED collimation lens of the prior art, are only limitted to unidirectional collimation mostly, and there is complex structure, realize cost is high, collimating effect is undesirable defect and deficiency, limit it and promote the use of.
Summary of the invention
The present invention is complicated for solving existing LED collimation lens arrangement, and beam divergence angle large and energy such as not to concentrate at the problem, and propose a kind of New LED collimation lens, its structure is simple, and the efficiency of light energy utilization is high, good to the collimating effect of LED emergent light.
For solving the problem, the technical scheme that the present invention takes is: a kind of LED collimation lens, comprises free form surface and bottom surface, light output end and side; Described free form surface is positioned at lensed tip, and make light occur be totally reflected and form collimated ray, described bottom surface is provided with a groove.
Preferably, described LED collimation lens comprise the even number free form surface of 2,4,6, more than 8 or 8.
Preferably, described free form surface and light output end are mutually corresponding, and the light on free form surface is totally reflected, and from adjacent light output end outgoing, form multidirectional collimation exiting surface, solve a difficult problem for multidirectional collimation bright dipping.
Preferably, described free form surface is parabola, ellipsoid or other the suitable curved surface that top is protruded.
Preferably, described light output end and plane perpendicular, light output end is the exit facet of collimated light.
Preferably, described side and plane perpendicular, side is the structural plane of lens.
Preferably, described light output end and side are mutually vertical.
Preferably, described bottom surface is provided with a groove, for embedding LED lamp bead, make the light-emitting area of chip and lens base be in same plane, and chip center is positioned at the center of groove.
Preferably, described LED collimation lens are the material that the refractive indexes such as PC or PMMA are greater than air refraction.
The beneficial effect that the present invention obtains is: LED collimation lens provided by the invention, and free form surface and light output end are mutually corresponding, forms multidirectional collimation exiting surface, solve two-way collimation, four-way collimation or four-way more than even number or odd number to collimation a difficult problem; LED collimation lens arrangement is simple, and reasonable in design, collimating effect is good, can reach the collimating effect that collimation is 1 degree; LED collimation lens can be used for the illumination occasion that submarine etc. needs collimated light beam.
Accompanying drawing explanation
Fig. 1 is embodiment 1 structure chart.
Fig. 2 is embodiment 1 stereogram.
Fig. 3 is LED collimation lens bright dipping schematic diagram.
Fig. 4 is embodiment 2 structure chart.
Fig. 5 is embodiment 2 stereogram.
Drawing reference numeral: 11, free form surface; 12, bottom surface; 121, groove; 13 sides; 14 light output ends; 21, free form surface; 22, bottom surface; 221, groove; 23 sides; 24 light output ends.
Detailed description of the invention
Embodiment 1:
See a kind of LED collimation lens of attached Fig. 1 and 2, comprise free form surface 11 and bottom surface 12, light output end 14 and side 13, described free form surface 11 is positioned at lensed tip, and make light occur be totally reflected and form collimated ray, described bottom surface 12 is provided with a groove.
Wherein, described LED collimation lens comprise the even number free form surface 11 of 2,4,6, more than 8 or 8.
Wherein, described free form surface 11 is mutually corresponding with light output end 12, and the light on free form surface 11 is totally reflected, and from adjacent light output end 14 outgoing, forms multidirectional collimation exiting surface, solves a difficult problem for multidirectional collimation bright dipping.
Wherein, the parabola, ellipsoid or other the suitable curved surface that protrude for top of described free form surface 11.
Wherein, described light output end 14 is vertical with bottom surface 12, and light output end 14 is the exit facet of collimated light.
Wherein, described side 13 is vertical with bottom surface 12, and side 13 is the structural plane of lens.
Wherein, described light output end 14 is mutually vertical with side 13.
Wherein, described bottom surface 12 is provided with a groove 121, for embedding LED lamp bead, make the light-emitting area of chip and lens base be in same plane, and chip center is positioned at the center of groove.
Wherein, as shown in Figure 3, the light sent from chip is by the hemisphere face entrance lens bottom lens, change the direction of propagation hardly, propagate a segment distance in lens after, light is divided into two parts, is critical with light d, and a part of light is (as light a, b, the free form surface 11 that c) all can be transmitted to lensed tip, by light output end 14 outgoing after total reflection, form collimated light; Another part light (as light e, f) then reflects directly by light output end 14 outgoing without the free form surface 11 of lensed tip, does not form collimated light.
In Fig. 5, L is half length of lens, and H is the angle of the height of lens, critical ray d and vertical direction
can be determined by formula (1)
（1）
LED light source bright dipping is generally lambert's type, and namely light intensity I is the distribution of lambert's type
（2）
Wherein
for largest light intensity.Can extrapolate thus directly from the size of light output end 14 output intensity, thus can regulate as required the ratio of L and H to control free form surface 11 energy of reflection light number, thus reach better collimating effect.Due to light intensity
increase and reduce, directly more weak from the light light intensity of light output end 14 outgoing, can abandon in right amount control do not affect collimating effect with the size of reducing glass.
Wherein, described LED collimation lens are the material that the refractive indexes such as PC or PMMA are greater than air refraction.
Embodiment 2:
See a kind of LED collimation lens of attached Figure 4 and 5, comprise free form surface 21 and bottom surface 22, light output end 24 and side 23, described free form surface 21 is positioned at lensed tip, and make light occur be totally reflected and form collimated ray, described bottom surface 22 is provided with a groove.
Wherein, described LED collimation lens comprise the even number free form surface 21 of 2,4,6, more than 8 or 8.
Wherein, described free form surface 21 is mutually corresponding with light output end 12, and the light on free form surface 21 is totally reflected, and from adjacent light output end 24 outgoing, forms multidirectional collimation exiting surface, solves a difficult problem for multidirectional collimation bright dipping.
Wherein, the parabola, ellipsoid or other the suitable curved surface that protrude for top of described free form surface 21.
Wherein, described light output end 24 is vertical with bottom surface 22, and light output end 24 is the exit facet of collimated light.
Wherein, described side 23 is vertical with bottom surface 22, and side 23 is the structural plane of lens.
Wherein, described light output end 24 is mutually vertical with side 23.
Wherein, described bottom surface 22 is provided with a groove 221, for embedding LED lamp bead, make the light-emitting area of chip and lens base be in same plane, and chip center is positioned at the center of groove.
Wherein, described LED collimation lens are the material that the refractive index such as PC material or PMMA is greater than air refraction.
What more than enumerate is only specific embodiments of the invention.Obviously, the invention is not restricted to above embodiment, can also have and manyly similar change shape.All distortion that those of ordinary skill in the art can directly derive from content disclosed by the invention or associate, all should think invention which is intended to be protected.
Claims (6)
1.LED collimation lens, comprises free form surface and bottom surface, it is characterized in that: also comprise light output end and side; Described free form surface is positioned at lensed tip, and make light occur be totally reflected and form collimated ray, described bottom surface is provided with a groove.
2. LED collimation lens according to claim 1, is characterized in that: described LED collimation lens comprise the even number free form surface of more than 2.
3. LED collimation lens according to claim 1 and 2, is characterized in that: described free form surface and light output end are mutually corresponding, form multiple collimation exiting surface.
4. LED collimation lens according to claim 1 and 2, is characterized in that: described free form surface is parabola or the ellipsoid of top protrusion.
5. LED collimation lens according to claim 1, is characterized in that: described light output end, bottom surface, side, mutually vertical between two.
6. LED collimation lens according to claim 1, is characterized in that: the material manufacturing LED collimation lens is PC or PMMA.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201410059042.2A CN104864361A (en) | 2014-02-21 | 2014-02-21 | LED collimating lens |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201410059042.2A CN104864361A (en) | 2014-02-21 | 2014-02-21 | LED collimating lens |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN104864361A true CN104864361A (en) | 2015-08-26 |
Family
ID=53910383
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201410059042.2A Pending CN104864361A (en) | 2014-02-21 | 2014-02-21 | LED collimating lens |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN104864361A (en) |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN110146986A (en) * | 2019-01-14 | 2019-08-20 | 深圳珑璟光电技术有限公司 | An augmented reality display optical system |
| FR3092900A1 (en) * | 2019-02-14 | 2020-08-21 | Psa Automobiles Sa | Lighting and / or light signaling device for motor vehicles. |
Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US20030026106A1 (en) * | 2001-08-01 | 2003-02-06 | Ulrich Knaack | Lamp for vehicle |
| US20090146049A1 (en) * | 2004-09-24 | 2009-06-11 | Epistar Corporation | Optoelectronic device assembly |
| US20100091498A1 (en) * | 2008-10-10 | 2010-04-15 | Koninklijke Philips Electronics N.V. | Low profile side emission tir lens for led |
| US20130163283A1 (en) * | 2010-07-23 | 2013-06-27 | Sharp Kabushiki Kaisha | Light guide, light source unit, illuminating device, and display device |
-
2014
- 2014-02-21 CN CN201410059042.2A patent/CN104864361A/en active Pending
Patent Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US20030026106A1 (en) * | 2001-08-01 | 2003-02-06 | Ulrich Knaack | Lamp for vehicle |
| US20090146049A1 (en) * | 2004-09-24 | 2009-06-11 | Epistar Corporation | Optoelectronic device assembly |
| US20100091498A1 (en) * | 2008-10-10 | 2010-04-15 | Koninklijke Philips Electronics N.V. | Low profile side emission tir lens for led |
| US20130163283A1 (en) * | 2010-07-23 | 2013-06-27 | Sharp Kabushiki Kaisha | Light guide, light source unit, illuminating device, and display device |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN110146986A (en) * | 2019-01-14 | 2019-08-20 | 深圳珑璟光电技术有限公司 | An augmented reality display optical system |
| FR3092900A1 (en) * | 2019-02-14 | 2020-08-21 | Psa Automobiles Sa | Lighting and / or light signaling device for motor vehicles. |
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| WD01 | Invention patent application deemed withdrawn after publication |
Application publication date: 20150826 |