WO2015011105A1 - Lentille pour source lumineuse - Google Patents

Lentille pour source lumineuse Download PDF

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Publication number
WO2015011105A1
WO2015011105A1 PCT/EP2014/065650 EP2014065650W WO2015011105A1 WO 2015011105 A1 WO2015011105 A1 WO 2015011105A1 EP 2014065650 W EP2014065650 W EP 2014065650W WO 2015011105 A1 WO2015011105 A1 WO 2015011105A1
Authority
WO
WIPO (PCT)
Prior art keywords
lens
light
emergent light
sub region
optical axis
Prior art date
Application number
PCT/EP2014/065650
Other languages
English (en)
Inventor
Jing Lin
Wei Xiong
Junhua Zeng
Hongwei Zhang
Original Assignee
Osram Gmbh
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by Osram Gmbh filed Critical Osram Gmbh
Publication of WO2015011105A1 publication Critical patent/WO2015011105A1/fr

Links

Classifications

    • 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
    • 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
    • F21V7/00—Reflectors for light sources
    • F21V7/0091—Reflectors for light sources using total internal reflection
    • G—PHYSICS
    • G02—OPTICS
    • G02B—OPTICAL ELEMENTS, SYSTEMS OR APPARATUS
    • G02B19/00—Condensers, e.g. light collectors or similar non-imaging optics
    • G02B19/0004—Condensers, e.g. light collectors or similar non-imaging optics characterised by the optical means employed
    • G02B19/0028—Condensers, e.g. light collectors or similar non-imaging optics characterised by the optical means employed refractive and reflective surfaces, e.g. non-imaging catadioptric systems
    • G—PHYSICS
    • G02—OPTICS
    • G02B—OPTICAL ELEMENTS, SYSTEMS OR APPARATUS
    • G02B19/00—Condensers, e.g. light collectors or similar non-imaging optics
    • G02B19/0033—Condensers, e.g. light collectors or similar non-imaging optics characterised by the use
    • G02B19/0047—Condensers, e.g. light collectors or similar non-imaging optics characterised by the use for use with a light source
    • G02B19/0061—Condensers, e.g. light collectors or similar non-imaging optics characterised by the use for use with a light source the light source comprising a LED
    • G—PHYSICS
    • G02—OPTICS
    • G02B—OPTICAL ELEMENTS, SYSTEMS OR APPARATUS
    • G02B19/00—Condensers, e.g. light collectors or similar non-imaging optics
    • G02B19/0033—Condensers, e.g. light collectors or similar non-imaging optics characterised by the use
    • G02B19/0047—Condensers, e.g. light collectors or similar non-imaging optics characterised by the use for use with a light source
    • G02B19/0071—Condensers, e.g. light collectors or similar non-imaging optics characterised by the use for use with a light source adapted to illuminate a complete hemisphere or a plane extending 360 degrees around the source
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F21—LIGHTING
    • F21Y—INDEXING SCHEME ASSOCIATED WITH SUBCLASSES F21K, F21L, F21S and F21V, RELATING TO THE FORM OR THE KIND OF THE LIGHT SOURCES OR OF THE COLOUR OF THE LIGHT EMITTED
    • F21Y2115/00—Light-generating elements of semiconductor light sources
    • F21Y2115/10—Light-emitting diodes [LED]

Definitions

  • the present invention relates to a lens for a light source.
  • the LED technology as an illumination technology with high efficiency, energy saving and long service lifetime presently is widely used in the illuminating device.
  • the LED technology can be used to realize the conventional illumination effects such as that of incandescent lamp or fluorescent lamp, and for instance, is used for a streetlamp on the road, spotlight in the store or for indoor lighting.
  • To use the LED illumina- tion technology in these circumstances not only can ensure sufficient light emitting intensity of the light source, but also can meet the user' s requirements to the illumination scope of the illuminating device.
  • the LED chip essentially illuminates directionally, that is, light emitted from the LED chip is mainly focused in one direction, further structure or device is needed in order to realize om- ni-directional illumination based on the use of the LED chip.
  • the present invention provides a novel lens for a light source.
  • the lens according to the present invention not only reduces the whole cost of the illuminating device due to its use of the materi ⁇ al at a low cost, but also enables the light from the light source, after passing through the lens, to realize the omni- directional illumination effect with only a single such lens owing to the novel structural design of the lens.
  • the object of the present invention is accomplished via such a lens for a light source.
  • the lens comprises a bottom sur ⁇ face and a protruding surface bulging from the bottom surface, the bottom surface comprises a recessed region, and a surface of the recessed region is configured as an incident surface, wherein, the protruding surface comprises: a first sub region, by which first light from the light source is re ⁇ fracted to emerge and form first emergent light; a second sub region, by which second light from the light source is re- fleeted and refracted to form second emergent light; and a third sub region, by which third light from the light source is reflected and refracted to form third emergent light.
  • the protruding surface comprises: a first sub region, by which first light from the light source is re ⁇ fracted to emerge and form first emergent light; a second sub region, by which second light from the light source is re- fleeted and refracted to form second emergent light; and a third sub region, by which third light from the light source is reflected and refracted to form
  • the first emergent light, the second emergent light and the third emer ⁇ gent light form omni-directional illumination.
  • the emergent light of the three parts the effect of multidi- rectional or omni-directional illumination can be realized using the lens.
  • the first emergent light mainly provides side il ⁇ lumination
  • the second emergent light mainly provides back ⁇ ward illumination
  • the third emergent light mainly pro- vides forward illumination.
  • the possibility of omni ⁇ directional illumination can be realized, and providing dif ⁇ ferent and combined emergent light with different regions of the lens .
  • the first sub region, the second sub region and the third sub region are arranged in sequence from the bottom surface in a bulging direction.
  • the occupation area of the lens can be reduced in a transverse direction, but also the light distribution characteristic of the light source can be used to make full use of the light from the light source to realize high optical efficiency.
  • the second sub region comprises first surfaces and second surfaces arranged alternately in groups, wherein a part of the second light, after being reflected by the first surfaces, emerges through the second surfaces to form a part of the second emergent light.
  • a part of the second light after being reflected by the second surfaces, emerges through the first surfaces to form the other parts of the second emergent light.
  • one part of the second light After re ⁇ flected and turned around, one part of the second light can emerge through the first surfaces in a certain direction to form illumination effect.
  • the first surface and the second surface of each group form a predetermined angle.
  • the illumination effect of different directions can be finally formed using different surfaces of the same group and wide-range coverage is accomplished.
  • the third sub region comprises a third surface and a fourth surface, wherein a part of the third light, after being reflected by the third surface, emerges through the fourth surface to form a part of the third emergent light.
  • the third light can emerge in different directions and finally form wide-range illumina ⁇ tion, wherein the illumination effect in a certain direction can be formed with the aid of the light emerging from the fourth surface.
  • a part of the third light after being reflected by the fourth surface, emerges through the third surface to form the other parts of the third emergent light.
  • the illumi ⁇ nation effect in a further direction can be formed with the aid of the light emerging from the third surface.
  • the fourth surface is configured in such a manner that the third light, after reflected by the fourth surface, forms the other parts of the converged third emergent light.
  • the converged light formed upon reflection of the fourth surface can meet the require ⁇ ment to high light intensity in a particular direction.
  • the first sub re ⁇ gion is configured to gradually get close to the optical axis from the bottom surface in the bulging direction. In this way, the first light, after passing through the first sub re ⁇ gion, can be refracted and guided to, for instance, the side direction of the lens to form the illumination effect.
  • the first sub region has a spline profile in the cross section.
  • Such configuration not only can enable the first light, after effectively refracted, to emit to a prede- termined direction, and also can provide a design easily ma ⁇ chined and manufactured.
  • the first sur ⁇ face is configured to gradually go away from the optical axis along a bulging direction
  • the second surface is configured to gradually get close to the optical axis along the bulging direction. Therefore, two surfaces facing different directions are formed, and it is possible to guide the second light to different directions so as to realize the wide-range illumination coverage.
  • the first surfaces and the second surfaces have a spline profile in the cross section.
  • Such configuration not only can enable the second light, after effectively reflected by different surfaces, to emit to different predetermined di ⁇ rections, but also provides the design which is easily ma ⁇ chined and manufactured.
  • the third sur ⁇ face is configured to gradually get close the optical axis in the bulging direction
  • the fourth surface is configured to gradually go away from the optical axis in the bulging di- rection.
  • the third surface and the fourth surface have a spline profile in the cross section.
  • Such configuration not only can enable the third light, after effectively reflected by different surfaces, to emit to different predetermined di ⁇ rections, but also provides the design which is easily ma ⁇ chined and manufactured.
  • the lens is configured rotationally symmetric. Thus, the light distribution of the emergent light which is finally rotationally symmetric can be realized.
  • the recessed region is configured with a hemi ⁇ spherical profile. According to such configuration, light from the light source can be incident in the lens from the recessed region, for instance, at a vertical incident angle, so as to realize the possibility of ensuring high optical ef ⁇ ficiency .
  • the lens is made of a transparent optical plastic or glass.
  • Such lens has a low cost, is easily machined and manufactured, and ensures good mechanical performance and op ⁇ tical performance.
  • Fig. 1 is a sectional view of a lens according to the present invention
  • Fig. 2 is a schematic diagram of optical path of the lens ac ⁇ cording to the present invention.
  • Fig. 1 shows a sectional view of a lens 100 according to the present invention.
  • the lens 100 on the whole is configured rota- tionally symmetric so as to meet the requirement that light from a light source 1, after passing through the lens 100, can finally form rotationally symmetrical light distribution of emergent light.
  • the lens 100 has a tree-shaped contour, light from the light source 1 distribute in 360 de ⁇ grees around the illuminating device having the lens 100, the lens 100 is configured to be made of, for instance, an opti ⁇ cal plastic or glass, which not only has a low cost but also ensures highly effective and reliable optical performance of such lens 100.
  • the lens 100 comprises a bottom surface 2 and a protruding surface 3 with three different regions, first sub region 31, second sub region 32 and third sub re- gion 33, respectively.
  • a light source 1 is disposed at the center of the bottom surface 2 of the lens 100.
  • Such light source 1 can be configures as, for example, an LED light source, so as to realize advantages such as high effi ⁇ ciency, energy saving and long service lifetime.
  • the bottom surface 2 further comprises a recessed region 4, which recessed re ⁇ gion 4 can be configured, for instance, in a hemispherical shape, and then light from the light source 1 received in the recessed region 4 can be incident upon a surface of the re- Switchd region 4 at a vertical incident angle, and enters the lens 100 taking the surface of the recessed region 4 as an incident surface 5.
  • the first sub region 31 of the lens 100 can be configured, for instance, to have only one surface as an emergent surface, in this way, first light LI from the light source 1 can be directly refracted and emerge after passing through the first sub region 31.
  • the first sub region 31 can be configured, for instance, to have only one surface as an emergent surface, in this way, first light LI from the light source 1 can be directly refracted and emerge after passing through the first sub region 31.
  • the second sub region 31 can be configured with a spline profile so as to ensure highly effective optical performance and meet the requirement to the light distribution of the emergent light, and to be machined and fabricated at a low cost .
  • the second sub region 32 and the third sub region 33 each have, for instance, two surfaces, wherein the second sub region 32 can be provided in groups, that is, there are multiple groups of the second sub regions 32, and each group has a first surface 321 and a se- cond surface 322, and the first surface 321 and the second surface 322 form a predetermined angle therebetween, and then, as shown in Fig. 2, viewed in the cross section, a profile having with multiple sharp corners in tooth shape, for example, can be formed on the circumference of the lens.
  • the multiple groups of the second sub regions 32 can be config ⁇ ured, for example, to stack along a direction of an optical axis X, that is, viewed in the cross section, the first sur ⁇ face 321 and the second surface 322 can be configured with a spline profile, and multi-layered of structure with a tooth profile, for instance, is formed on the circumference of the lens 100, consequently, the light distribution characteristic of the light source 1 can be fully used to collect light from the light source 1, , second light L2 from the light source 1 is guided to different directions so as to finally realize the wide-range illumination effect, for instance, mainly in a backward direction.
  • the third sub region 33 is further configured in the top area of the lens 100, and such third sub region 33 is configured _
  • the third surface 331 and the fourth surface 332 also can be configured with a spline profile, and viewed in cross section, the third surface 331 gradually gets close to the optical axis X of the lens 100, and the fourth surface 332 gradually goes away from the optical axis X in a direction from the bottom surface 2 to the protruding surface 3.
  • Fig. 2 shows a schematic diagram of optical path of the lens 100 according to the present invention.
  • the first light LI from the light source 1 emerges after passing through the first sub region 31 of the lens 100.
  • the first sub region 31 can be configured with a profile having a spline curve, in this way, the first light LI can be directly refracted to form first emergent light LI' which provides il ⁇ lumination of the lens mainly in the side direction, and also in the backward direction, and ensures to meet the illumina ⁇ tion effect of a part of omni-direction of the lens 100.
  • the second light L2 from the light source 1 emerges after passing through the second sub region 32 of the lens 100.
  • the second sub region 32 also can be configured with a spline profile, wherein the second sub region 32 comprises two sur ⁇ faces facing different directions, the first surface 321 and the second surface 322, and the first surface 321 and the se ⁇ cond surface 322 both can realize the reflective and refrac ⁇ tive effects, respectively, that is, for instance, one part of the second light L2 turns to emit towards the second sur ⁇ face 322 after being reflected by the first surface 321, and emerges after being confronted with and refracted by the se- cond surface 322.
  • second emergent light L2' having wide-range il ⁇ lumination effect in different directions is finally formed by means of the second sub region 32.
  • Such second emergent light L2' specifically can emerge in a backward direction, and then the illumination effect in the backward direction among the omni-direction is formed, and also a few part of the second emergent light L2' forms illumination in the side direction .
  • the third light L3 of the light source 1 forms third emergent light L3' after emerging from the third sub region 33 of the lens 100.
  • the third sub region 33 comprises two surfaces fac ⁇ ing different directions, the third surface 331 and the fourth surface 332. Similar to the second sub region, the third light L3 is guided by the two surfaces to emerge from different directions. In other words, for instance, one part of the third light L3 turns to emit towards the fourth sur ⁇ face 332 after being reflected by the third surface 331, and emerges after being confronted with and refracted by the fourth surface 332, similarly, the other part of the third light L3 turns to emit towards the third surface 331 after being reflected by the fourth surface 332, and emerges after being confronted with and refracted by the further surface 33.
  • third emergent light L3' having wide-range illumination effect in different directions is finally formed by means of the third sub region 33.
  • Such third emergent light L3' specifically can emerge in a forward direction, and then the illumination effect in the forward direction among the omni-direction is formed, and also a few part of the se ⁇ cond emergent light L2' forms illumination in the side direc- tion.
  • the first surface 321 and the second sur ⁇ face 322 achieve similar or same function, thus are interchangeable, on the basis that the second light L2 is refract ⁇ ed and emerges through any of the first surface 321 or the second surface 322 before being reflected by the other one.

Landscapes

  • Physics & Mathematics (AREA)
  • General Physics & Mathematics (AREA)
  • Optics & Photonics (AREA)
  • Engineering & Computer Science (AREA)
  • General Engineering & Computer Science (AREA)
  • Non-Portable Lighting Devices Or Systems Thereof (AREA)
  • Lenses (AREA)

Abstract

La présente invention concerne une lentille pour une source lumineuse. La lentille comprend une surface inférieure et une surface faisant saillie en renflement depuis la surface inférieure, la surface inférieure comprend une région en retrait, et une surface de la région en retrait est conçue en tant que surface incidente, la surface faisant saillie comprenant : une première sous-région, par laquelle une première lumière provenant de la source lumineuse est réfractée pour émerger et former une première lumière émergente ; une deuxième sous-région, par laquelle une deuxième lumière provenant de la source lumineuse est réfléchie et réfractée pour former une deuxième lumière émergente ; et une troisième sous-région, par laquelle une troisième lumière provenant de la source lumineuse est réfléchie et réfractée pour former une troisième lumière émergente.
PCT/EP2014/065650 2013-07-22 2014-07-21 Lentille pour source lumineuse WO2015011105A1 (fr)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
CN201310308936.6A CN104197275A (zh) 2013-07-22 2013-07-22 一种用于光源的透镜
CN201310308936.6 2013-07-22

Publications (1)

Publication Number Publication Date
WO2015011105A1 true WO2015011105A1 (fr) 2015-01-29

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Application Number Title Priority Date Filing Date
PCT/EP2014/065650 WO2015011105A1 (fr) 2013-07-22 2014-07-21 Lentille pour source lumineuse

Country Status (2)

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CN (1) CN104197275A (fr)
WO (1) WO2015011105A1 (fr)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
AT17161U1 (de) * 2015-03-16 2021-07-15 Zumtobel Lighting Gmbh Optisches Element zur Beeinflussung der Lichtabgabe von Leuchtmitteln

Families Citing this family (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN104948941B (zh) * 2014-03-28 2018-03-30 赛恩倍吉科技顾问（深圳）有限公司 Led光源模组及其透镜

Citations (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US20090128921A1 (en) * 2007-11-15 2009-05-21 Philips Solid-State Lighting Solutions Led collimator having spline surfaces and related methods
EP2214046A1 (fr) * 2009-02-03 2010-08-04 Osram Sylvania Inc. Optique divergente pour diodes électroluminescentes
CN202947077U (zh) * 2012-10-16 2013-05-22 欧司朗股份有限公司 透镜以及发光装置

Family Cites Families (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US8434914B2 (en) * 2009-12-11 2013-05-07 Osram Sylvania Inc. Lens generating a batwing-shaped beam distribution, and method therefor
CN103851538A (zh) * 2012-12-04 2014-06-11 欧司朗有限公司 透镜、具有透镜的全向照明装置和改型灯

Patent Citations (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US20090128921A1 (en) * 2007-11-15 2009-05-21 Philips Solid-State Lighting Solutions Led collimator having spline surfaces and related methods
EP2214046A1 (fr) * 2009-02-03 2010-08-04 Osram Sylvania Inc. Optique divergente pour diodes électroluminescentes
CN202947077U (zh) * 2012-10-16 2013-05-22 欧司朗股份有限公司 透镜以及发光装置

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
AT17161U1 (de) * 2015-03-16 2021-07-15 Zumtobel Lighting Gmbh Optisches Element zur Beeinflussung der Lichtabgabe von Leuchtmitteln

Also Published As

Publication number Publication date
CN104197275A (zh) 2014-12-10

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