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GB2509561A - Fresnel lens with curved and oblique surfaces - Google Patents

Fresnel lens with curved and oblique surfaces Download PDF

Info

Publication number
GB2509561A
GB2509561A GB1309896.7A GB201309896A GB2509561A GB 2509561 A GB2509561 A GB 2509561A GB 201309896 A GB201309896 A GB 201309896A GB 2509561 A GB2509561 A GB 2509561A
Authority
GB
United Kingdom
Prior art keywords
lens
curved surface
zoom
free curved
layers
Prior art date
Legal status (The legal status 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 status listed.)
Withdrawn
Application number
GB1309896.7A
Other versions
GB201309896D0 (en
Inventor
Chen-Wei Hsu
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Individual
Original Assignee
Individual
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 Individual filed Critical Individual
Publication of GB201309896D0 publication Critical patent/GB201309896D0/en
Publication of GB2509561A publication Critical patent/GB2509561A/en
Withdrawn legal-status Critical Current

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
    • F21V5/045—Refractors for light sources of lens shape the lens having discontinuous faces, e.g. Fresnel lenses
    • G—PHYSICS
    • G02—OPTICS
    • G02B—OPTICAL ELEMENTS, SYSTEMS OR APPARATUS
    • G02B3/00—Simple or compound lenses
    • G02B3/02—Simple or compound lenses with non-spherical faces
    • G02B3/08—Simple or compound lenses with non-spherical faces with discontinuous faces, e.g. Fresnel lens
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F21—LIGHTING
    • F21K—NON-ELECTRIC LIGHT SOURCES USING LUMINESCENCE; LIGHT SOURCES USING ELECTROCHEMILUMINESCENCE; LIGHT SOURCES USING CHARGES OF COMBUSTIBLE MATERIAL; LIGHT SOURCES USING SEMICONDUCTOR DEVICES AS LIGHT-GENERATING ELEMENTS; LIGHT SOURCES NOT OTHERWISE PROVIDED FOR
    • F21K9/00—Light sources using semiconductor devices as light-generating elements, e.g. using light-emitting diodes [LED] or lasers
    • F21K9/60—Optical arrangements integrated in the light source, e.g. for improving the colour rendering index or the light extraction
    • F21K9/69—Details of refractors forming part of the light source
    • 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
    • G02B19/0009—Condensers, e.g. light collectors or similar non-imaging optics characterised by the optical means employed having refractive surfaces only
    • G02B19/0014—Condensers, e.g. light collectors or similar non-imaging optics characterised by the optical means employed having refractive surfaces only at least one surface having optical power
    • 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
    • G02B19/0061—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
    • G02B19/0066—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 in the form of an LED array
    • 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]

Landscapes

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

Abstract

A Fresnel lens for illumination mainly comprises a lens body that has at least one free curved surface 21 on a side. Zoom curved surfaces 22 have one side 220 designed to be oblique and the other side is an arc surface 221. Flat surface 23 may be on a side opposite to the free curved surface. Two free curved surfaces may be used (41, figure 9) and the lens may be symmetrical vertically and horizontally. The lens may be used for projection of light from an LED (3, figure 7) and may be used for vehicle lamps, street lamps, flashlights or projection lights.

Description

ZOOM LENS WITH MULTI-LAYERS FOR ILLUMINATION
FIELD OF THE INVENTION
The present invention relates to a zoom lens with multi-layers for illumination, particularly a zoom lens with a plurality of curved surfaces able to modify the luminance and the angle of the light projection and to reduce the thickness and the area of the lens.
Hence, it is able to reduce the production cost, to improve the light projection distance and range and luminance level and control of light projection angles.
DESCRIPTION OF THE PRIOR ART
Commonly, LED has been used to replace most of the bulbs, such as vehicle lamp, street lamp, flashlight and searchlight for friendly environmental purpose. However, the projection area of LED is smaller as shown in figure 1. In order to enhance the luminance and the projection area of the lighting devices, either a hemispheric lens 11 is arranged in front of a LED 10 and a light reflector 12 is disposed along LED 10, or, the numbers of LED are increased. However, either way is complex and would cause the production cost increasing. Furthermore, they are only able to change the projection either distance or range due to the ways of increasing light projections. In addition, the light is based on the scattering radiation which the light projection cannot be affected. As a result, the centre of the projected light is much brighter than surrounding area. Moreover, the hemispheric lens requires greater thickness and larger area in order to achieve certain projection range.
Furthermore, the light of the prior lens is bright on the centre but dark surround so the light can't be balanced, and the light projection can't be changed to control brightness and angle of the light by user's demand.
SUMMARY OF THE PRESENT INVENTION
Accordingly, the primary object of the present invention is to provide a zoom lens with multi-layers for illumination capable of controlling the brightness and projecting angle, distance and the area with thinner lens and lower production costs.
To achieve the objectives, the zoom lens with multi-layers comprises a lens body that includes at least one free curved surface on a side. The free curved surface is bored with plural zoom curved surfaces with multi-layers. One side of the zoom curved surface is designed to be an oblique, and the other side of the zoom curved surface is designed to be an arc surface. Therefore, the body of the zoom lens comprises numbers of complex free curved surfaces. In order to achieve the required lighting efficacy, the zoom curved surface can be designed as multiple patterns so that the light can be refracted and focused by the variety combinations of the patterns due to multiple focuses of the patterns.
A flat surface is formed to a side of the lens body opposite to the zoom curved surface.
The number and the size of the plurality of the patterns on the lens are formed able to be symmetric vertically and horizontally.
The number and the size of the plurality of the patterns on the lens are formed able to be symmetric vertically but not horizontally.
The number and the size of the plurality of the patterns on the lens are formed able to be symmetric d horizontally but not vertically.
The lens body is disposed with at least two free curved surfaces which respectively has a plurality of patterns.
BRIEF DESCRIPTION OF THE DRAWINGS
Fig. 1 is a schematic view showing a prior art of lens and lamp.
Fig. 2 is a perspective view showing a first embodiment of the present invention.
Fig. 3 is a front view showing the first embodiment of the present invention.
Fig. 4 is a side view showing the first embodiment of the present invention.
Fig. 5 is a top view showing the first embodiment of the present invention.
Fig. 6 is a side exploded schematic view showing the light projection of the first embodiment of the present invention.
Fig. 7 is a top exploded schematic view showing the light projection of the first embodiment of the present invention.
Fig. 8 is a diagram showing an illumination distribution of the first embodiment of the present invention.
Fig. 9 is a front view showing the two free curved surfaces of the second embodiment of the present invention.
Fig. 10 is a front view showing the curved surface of the third embodiment of the present invention able to be symmetric horizontally but not vertically.
Fig. 11 is a front view showing the curved surface of the fourth embodiment of the present invention able to be symmetric vertically but not horizontally.
DETAILED DESCRIPTION OF THE INVENTION
In order that those skilled in the art can further understand the present invention, a description will be provided in the following in details. However, these descriptions and the appended drawings are only used to cause those skilled in the art to understand the objects, features, and characteristics of the present invention, but not to be used to confine the scope and spirit of the present invention defined in the appended claims.
Fig. 1 to 5 the embodiment of the zoom lens with multi-layers for illumination according to the present invention is illustrated. The zoom lens with multi-layers for illumination comprises a lens body 2. The lens body 2 has at least one free curved surface 21. The free curved surface 21 includes a plurality of zoom curved surfaces 22 with multiple layers. The zoom curved surface 22 consists of an oblique plane 220 on one side and arc surface 221 on the other side. Aflat surface 23 is formed to an opposite side of the free curved surface 21 on the lens body 2. As a result, the zoom lens with multi-layers for illumination is formed completely.
The operation of the preferable embodiment of the present invention is illustrated in Fig. 6 to 8. The light source 3 is disposed behind the flat surface 23 of the lens body 2.
The light projection 30 from the light source 3 will be refracted and focused thru the plurality of the zoom curved surfaces 22 of the lens body 2. Thus, the present invention can increase the projection range and brightness, balance light and control the projection angle. Moreover, the present invention can decrease the thickness of the lens body 2 SO that the production cost is able to be reduced.
The number of the free curved surfaces 21 of the present invention can be determined by the demands of the luminance. Referring to Fig. 9, the lens body 4 can have at least two free curved surfaces 41. Moreover, each free curved surface 41 has a plurality of zoom curved surfaces 42. Through the arrangement of the number and the location of the zoom curved surfaces 42 of the lens body 4, different level of the luminance can be achieved. Referring to Fig. 9, the number of the zoom curved surfaces 42 on the middle position is more than the number of zoom curved surface 42 on the both sides of the lens body 3. As a result, the light on the middle will be bright but the light on the both sides will be dark. In addition, through the both vertically and horizontally symmetrical arrangement of number and size of the zoom curved surfaces 22 of the free curved surface 21 of the lens body 2, the balancing of brightness can be achieved. Besides that, in order to control the projection angle, the arrangement of the zoom curved surface 22 of the lens body 2 can be designed irregularly, i.e. horizontally symmetric but not vertically (Fig. 10) or vertically symmetric but not horizontally (Fig. 11).
It is designed to enhance the luminance by more numbers of the zoom curved surface 22 on the lens body 2. On the contrary, less number of the curved surfaces 22 on the lens body 2 is designed to lower the lamination. Due to the light refraction of the present invention, when the light enters into different materials, it will result in different index of refraction. The curved surface can be divided into multiple patterns through the different combinations of free curved surfaces. Furthermore, through the various combinations of zooming and focusing on the curved surfaces, the control of the luminance and projection angle can be achieved.
The present invention can be used to enhance the light source of various light devices, such as vehicle lamp, Street lamp, flashlight or projection light.
The present invention is thus described, it will be obvious that the same may be varied in many ways. Such variations are not to be regarded as a departure from the spirit and scope of the present invention, and all such modifications as would be obvious to one skilled in the art are intended to be included within the scope of the following claims.

Claims (7)

  1. WHAT IS CLAIMED IS: 1. A zoom lens with multi-layers for illumination comprising: a lens body having at least one free curved surface on a side of the lens body; the free curved surface designed as multiple zoom curved surfaces with multiple layers; one side of the zoom curved surface is designed to be oblique and the other side is arc surface.
  2. 2. The zoom lens with multi-layers for illumination as claimed in claimed 1, wherein a flat surface is formed to an opposite side of the free curved surface on the lens body.
  3. 3. The zoom lens with multi-layers for illumination as claimed in claimed 1, wherein the number and size of the plurality of the curved surfaces of the free curved surface are designed able to be symmetric vertically and horizontally.
  4. 4. The zoom lens with multi-layers for illumination as claimed in claimed 1, wherein the number and size of the plurality of the curved surfaces on the free curved surface are designed able to be symmetric horizontally but not vertically.
  5. 5. The zoom lens with multi-layers for illumination as claimed in claimed 1, wherein the number and size of the plurality of the curved surfaces on the free curved surface are designed able be symmetric vertically but not horizontally.
  6. 6. The zoom lens with multi-layers for illumination as claimed in claimed 1, wherein the lens body comprises at least two free curved surfaces; each free curved surface includes the plurality ot the curved surface.
  7. 7. A zoom lens substantially as hereinbefore described with reference to and as shown in Figures 2 to 11 of the accompanying drawings.
GB1309896.7A 2013-01-04 2013-06-04 Fresnel lens with curved and oblique surfaces Withdrawn GB2509561A (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
TW102100221A TWI467117B (en) 2013-01-04 2013-01-04 Multi - level zoom lens for illumination

Publications (2)

Publication Number Publication Date
GB201309896D0 GB201309896D0 (en) 2013-07-17
GB2509561A true GB2509561A (en) 2014-07-09

Family

ID=48805675

Family Applications (1)

Application Number Title Priority Date Filing Date
GB1309896.7A Withdrawn GB2509561A (en) 2013-01-04 2013-06-04 Fresnel lens with curved and oblique surfaces

Country Status (4)

Country Link
KR (1) KR200475156Y1 (en)
FR (1) FR3000808B3 (en)
GB (1) GB2509561A (en)
TW (1) TWI467117B (en)

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
AT16042U1 (en) * 2014-10-30 2018-12-15 Zumtobel Lighting Gmbh Optical element and arrangement for emitting light with an optical element
US10364961B2 (en) 2017-10-31 2019-07-30 Rebo Lighting & Electronics, Llc Illumination device for a vehicle

Families Citing this family (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP6761968B2 (en) * 2016-05-17 2020-09-30 パナソニックＩｐマネジメント株式会社 Lighting device

Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US5742438A (en) * 1994-09-16 1998-04-21 In Focus Systems, Inc. Projection illumination system
EP1089094A1 (en) * 1999-09-30 2001-04-04 Valeo Vision Method of manufacturing refractive elements and refractive elements for an illumination device
US20060056185A1 (en) * 2004-09-16 2006-03-16 Takeshi Morino Fresnel lens and lighting apparatus provided with the fresnel lens
EP2287641A1 (en) * 2009-08-21 2011-02-23 Mass Technology (H.K.) Ltd. Fresnel lens sheet and luminaire using the same

Family Cites Families (8)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP4290585B2 (en) * 2004-02-26 2009-07-08 株式会社小糸製作所 Vehicle lighting
JP2006119223A (en) 2004-10-19 2006-05-11 Nidec Sankyo Corp Condensing lens and optical scanner
US7352517B2 (en) * 2005-05-09 2008-04-01 Konica Minolta Opto, Inc. Optical pickup apparatus
TWI322867B (en) * 2007-04-10 2010-04-01 Ind Tech Res Inst Improved lamp fixture
CN102003676B (en) * 2009-08-28 2012-10-10 鸿富锦精密工业（深圳）有限公司 Lens
KR20110041073A (en) * 2009-10-15 2011-04-21 이성준 Fresnel lens composite for solar heat collection
KR20110062980A (en) * 2009-12-04 2011-06-10 에이피엘시스템(주) Led lighting lamp
CN102478676A (en) * 2010-11-30 2012-05-30 比亚迪股份有限公司 Light intensifying chip and backlight module group

Patent Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US5742438A (en) * 1994-09-16 1998-04-21 In Focus Systems, Inc. Projection illumination system
EP1089094A1 (en) * 1999-09-30 2001-04-04 Valeo Vision Method of manufacturing refractive elements and refractive elements for an illumination device
US20060056185A1 (en) * 2004-09-16 2006-03-16 Takeshi Morino Fresnel lens and lighting apparatus provided with the fresnel lens
EP2287641A1 (en) * 2009-08-21 2011-02-23 Mass Technology (H.K.) Ltd. Fresnel lens sheet and luminaire using the same

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
AT16042U1 (en) * 2014-10-30 2018-12-15 Zumtobel Lighting Gmbh Optical element and arrangement for emitting light with an optical element
US10364961B2 (en) 2017-10-31 2019-07-30 Rebo Lighting & Electronics, Llc Illumination device for a vehicle

Also Published As

Publication number Publication date
TWI467117B (en) 2015-01-01
KR20140004291U (en) 2014-07-14
TW201428212A (en) 2014-07-16
GB201309896D0 (en) 2013-07-17
FR3000808A3 (en) 2014-07-11
FR3000808B3 (en) 2015-07-17
KR200475156Y1 (en) 2014-11-12

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WAP Application withdrawn, taken to be withdrawn or refused ** after publication under section 16(1)