WO2010148389A2 - Anamorphoseur de lumière - Google Patents

Anamorphoseur de lumière Download PDF

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Publication number
WO2010148389A2
WO2010148389A2 PCT/US2010/039329 US2010039329W WO2010148389A2 WO 2010148389 A2 WO2010148389 A2 WO 2010148389A2 US 2010039329 W US2010039329 W US 2010039329W WO 2010148389 A2 WO2010148389 A2 WO 2010148389A2
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WO
WIPO (PCT)
Prior art keywords
light
article
base surface
surface area
funnels
Prior art date
Application number
PCT/US2010/039329
Other languages
English (en)
Other versions
WO2010148389A3 (fr
Inventor
Pao Kuang Kuo
Original Assignee
Wayne State University
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Filing date
Publication date
Application filed by Wayne State University filed Critical Wayne State University
Publication of WO2010148389A2 publication Critical patent/WO2010148389A2/fr
Publication of WO2010148389A3 publication Critical patent/WO2010148389A3/fr

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Classifications

    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01L—SEMICONDUCTOR DEVICES NOT COVERED BY CLASS H10
    • H01L31/00—Semiconductor devices sensitive to infrared radiation, light, electromagnetic radiation of shorter wavelength or corpuscular radiation and specially adapted either for the conversion of the energy of such radiation into electrical energy or for the control of electrical energy by such radiation; Processes or apparatus specially adapted for the manufacture or treatment thereof or of parts thereof; Details thereof
    • H01L31/04—Semiconductor devices sensitive to infrared radiation, light, electromagnetic radiation of shorter wavelength or corpuscular radiation and specially adapted either for the conversion of the energy of such radiation into electrical energy or for the control of electrical energy by such radiation; Processes or apparatus specially adapted for the manufacture or treatment thereof or of parts thereof; Details thereof adapted as photovoltaic [PV] conversion devices
    • H01L31/054—Optical elements directly associated or integrated with the PV cell, e.g. light-reflecting means or light-concentrating means
    • H01L31/0547—Optical elements directly associated or integrated with the PV cell, e.g. light-reflecting means or light-concentrating means comprising light concentrating means of the reflecting type, e.g. parabolic mirrors, concentrators using total internal reflection
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F24—HEATING; RANGES; VENTILATING
    • F24S—SOLAR HEAT COLLECTORS; SOLAR HEAT SYSTEMS
    • F24S23/00—Arrangements for concentrating solar-rays for solar heat collectors
    • F24S23/30—Arrangements for concentrating solar-rays for solar heat collectors with lenses
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F24—HEATING; RANGES; VENTILATING
    • F24S—SOLAR HEAT COLLECTORS; SOLAR HEAT SYSTEMS
    • F24S23/00—Arrangements for concentrating solar-rays for solar heat collectors
    • F24S23/70—Arrangements for concentrating solar-rays for solar heat collectors with reflectors
    • F24S23/79—Arrangements for concentrating solar-rays for solar heat collectors with reflectors with spaced and opposed interacting reflective surfaces
    • G—PHYSICS
    • G02—OPTICS
    • G02B—OPTICAL ELEMENTS, SYSTEMS OR APPARATUS
    • G02B27/00—Optical systems or apparatus not provided for by any of the groups G02B1/00 - G02B26/00, G02B30/00
    • G02B27/09—Beam shaping, e.g. changing the cross-sectional area, not otherwise provided for
    • G02B27/0938—Using specific optical elements
    • G02B27/0994—Fibers, light pipes
    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01L—SEMICONDUCTOR DEVICES NOT COVERED BY CLASS H10
    • H01L25/00—Assemblies consisting of a plurality of individual semiconductor or other solid state devices ; Multistep manufacturing processes thereof
    • H01L25/03—Assemblies consisting of a plurality of individual semiconductor or other solid state devices ; Multistep manufacturing processes thereof all the devices being of a type provided for in the same subgroup of groups H01L27/00 - H01L33/00, or in a single subclass of H10K, H10N, e.g. assemblies of rectifier diodes
    • H01L25/04—Assemblies consisting of a plurality of individual semiconductor or other solid state devices ; Multistep manufacturing processes thereof all the devices being of a type provided for in the same subgroup of groups H01L27/00 - H01L33/00, or in a single subclass of H10K, H10N, e.g. assemblies of rectifier diodes the devices not having separate containers
    • H01L25/075—Assemblies consisting of a plurality of individual semiconductor or other solid state devices ; Multistep manufacturing processes thereof all the devices being of a type provided for in the same subgroup of groups H01L27/00 - H01L33/00, or in a single subclass of H10K, H10N, e.g. assemblies of rectifier diodes the devices not having separate containers the devices being of a type provided for in group H01L33/00
    • H01L25/0753—Assemblies consisting of a plurality of individual semiconductor or other solid state devices ; Multistep manufacturing processes thereof all the devices being of a type provided for in the same subgroup of groups H01L27/00 - H01L33/00, or in a single subclass of H10K, H10N, e.g. assemblies of rectifier diodes the devices not having separate containers the devices being of a type provided for in group H01L33/00 the devices being arranged next to each other
    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01L—SEMICONDUCTOR DEVICES NOT COVERED BY CLASS H10
    • H01L27/00—Devices consisting of a plurality of semiconductor or other solid-state components formed in or on a common substrate
    • H01L27/14—Devices consisting of a plurality of semiconductor or other solid-state components formed in or on a common substrate including semiconductor components sensitive to infrared radiation, light, electromagnetic radiation of shorter wavelength or corpuscular radiation and specially adapted either for the conversion of the energy of such radiation into electrical energy or for the control of electrical energy by such radiation
    • H01L27/144—Devices controlled by radiation
    • H01L27/146—Imager structures
    • H01L27/14601—Structural or functional details thereof
    • H01L27/14625—Optical elements or arrangements associated with the device
    • H01L27/14629—Reflectors
    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01L—SEMICONDUCTOR DEVICES NOT COVERED BY CLASS H10
    • H01L31/00—Semiconductor devices sensitive to infrared radiation, light, electromagnetic radiation of shorter wavelength or corpuscular radiation and specially adapted either for the conversion of the energy of such radiation into electrical energy or for the control of electrical energy by such radiation; Processes or apparatus specially adapted for the manufacture or treatment thereof or of parts thereof; Details thereof
    • H01L31/02—Details
    • H01L31/0232—Optical elements or arrangements associated with the device
    • H01L31/02325—Optical elements or arrangements associated with the device the optical elements not being integrated nor being directly associated with the device
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F24—HEATING; RANGES; VENTILATING
    • F24S—SOLAR HEAT COLLECTORS; SOLAR HEAT SYSTEMS
    • F24S23/00—Arrangements for concentrating solar-rays for solar heat collectors
    • F24S23/70—Arrangements for concentrating solar-rays for solar heat collectors with reflectors
    • F24S2023/83—Other shapes
    • F24S2023/837—Other shapes hyperbolic
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F24—HEATING; RANGES; VENTILATING
    • F24S—SOLAR HEAT COLLECTORS; SOLAR HEAT SYSTEMS
    • F24S23/00—Arrangements for concentrating solar-rays for solar heat collectors
    • F24S23/70—Arrangements for concentrating solar-rays for solar heat collectors with reflectors
    • F24S2023/87—Reflectors layout
    • F24S2023/878—Assemblies of spaced reflective elements in the form of grids, e.g. vertical or inclined reflective elements extending over heat absorbing elements
    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01L—SEMICONDUCTOR DEVICES NOT COVERED BY CLASS H10
    • H01L2924/00—Indexing scheme for arrangements or methods for connecting or disconnecting semiconductor or solid-state bodies as covered by H01L24/00
    • H01L2924/0001—Technical content checked by a classifier
    • H01L2924/0002—Not covered by any one of groups H01L24/00, H01L24/00 and H01L2224/00
    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01L—SEMICONDUCTOR DEVICES NOT COVERED BY CLASS H10
    • H01L33/00—Semiconductor devices having potential barriers specially adapted for light emission; Processes or apparatus specially adapted for the manufacture or treatment thereof or of parts thereof; Details thereof
    • H01L33/48—Semiconductor devices having potential barriers specially adapted for light emission; Processes or apparatus specially adapted for the manufacture or treatment thereof or of parts thereof; Details thereof characterised by the semiconductor body packages
    • H01L33/58—Optical field-shaping elements
    • Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
    • Y02E—REDUCTION OF GREENHOUSE GAS [GHG] EMISSIONS, RELATED TO ENERGY GENERATION, TRANSMISSION OR DISTRIBUTION
    • Y02E10/00—Energy generation through renewable energy sources
    • Y02E10/40—Solar thermal energy, e.g. solar towers
    • Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
    • Y02E—REDUCTION OF GREENHOUSE GAS [GHG] EMISSIONS, RELATED TO ENERGY GENERATION, TRANSMISSION OR DISTRIBUTION
    • Y02E10/00—Energy generation through renewable energy sources
    • Y02E10/50—Photovoltaic [PV] energy
    • Y02E10/52—PV systems with concentrators

Definitions

  • the present invention is related to an improved light concentrator and light spreader.
  • a typical imaging device typically includes a plurality of photocells for collecting the light necessary for imaging.
  • CMOS technology has gained popularity in recent years in comparison with the traditional GaAs imaging devices in spite of the intrinsic less sensitivity and speed of the silicon photocells in comparison with GaAs ones.
  • An advantage of CMOS imaging technology is its compatibility with the standard semiconductor processes, thereby reducing expenses as compared to GaAs processes.
  • a second advantage is the ability to place control and switching circuits next to the photocells. This latter advantage provides increased flexibility in making sophisticated devices.
  • the development of CMOS imaging technology suffers from several bottlenecks. The first is the fight for surface area between the main functions, light collection and circuitry. More sophistication in circuitry demands more surface area that cuts into the available area for light collection, which results in less sensitivity and speed. Another issue is the blooming effect.
  • LCD monitors are also pixel-oriented devices.
  • An LCD pixel can change its optical property from transparent to partially transparent to opaque in milliseconds according to a control voltage. Therefore, it requires a uniformly lit background. This is provided by a large number of lights (LED) behind a diffusing layer.
  • LED lights
  • the present invention solves one or more problems of the prior art by providing, in at least one embodiment, a light funnel.
  • the light funnel of the present embodiment includes a transparent funnel-shaped article having a first base surface, a second base surface, and a peripheral surface.
  • the first base surface has a first surface area and the second base surface has a second surface area wherein the first surface area is greater than the second surface area.
  • the light funnel further includes a reflecting layer disposed over the peripheral layer.
  • a light concentrator/spreader comprising a plurality of light funnels is provided.
  • the light concentrator/spreader includes a support and a plurality of light funnels disposed in the support.
  • Each light funnel of the plurality of light funnels includes a transparent funnel-shaped article having a first base surface, a second base surface, and a peripheral surface.
  • the first base surface has a first surface area and the second base surface has a second surface area. Characteristically, the first surface area is greater than the second surface area and the peripheral surface has a cross section that defines a hyperbola.
  • a reflecting coating is disposed over the peripheral layer.
  • FIGURE IA is a cross sectional view of the light funnel
  • FIGURE IB is a top view of the light funnel
  • FIGURE 2 is a cross sectional view of a light funnel with a multilayer reflecting layer
  • FIGURE 3A is a cross sectional view of a light funnel coupled to a photoactive device that is substantially planar;
  • FIGURE 3B is a cross sectional view of a light funnel coupled to a photoactive device that is curved;
  • FIGURE 4A is a schematic illustration demonstrating the modeling of a light ray using a modeling ellipse in the case of a ray that is not transmitted out of the second base surface;
  • FIGURE 4B is a schematic illustration demonstrating the modeling of a light ray using a modeling ellipse in the case of a ray that is transmitted out of the second base surface;
  • FIGURE 5 is a schematic illustration demonstrating that a light ray falling between the foci of the modeling ellipse cannot be modeled by the procedure of Figures 3A and 3B;
  • FIGURE 6 is a schematic illustration demonstrating the modeling of a light ray using a modeling hyperbola
  • FIGURE 7 is a principle cross-section of the family of confocal ellipses and hyperbolae
  • FIGURE 8 A provides a plot of the input solar energy as a function of time to a simulation of the collected solar energy for three different stationary solar collectors;
  • FIGURE 8B provides plots depicting the profile of the collected energy collected as function of time for three different stationary solar collectors
  • FIGURE 9A is a cross section of a light concentrator/spreader incorporating a plurality of light funnels; and [0022] FIGURE 9B is a top view of a light concentrator/spreader incorporating a plurality of light funnels;
  • FIGURE 10 is a cross section of a light concentrator/spreader aligned to an imaging device
  • FIGURE 11 is a cross section of a light concentrator/spreader aligned to a light emitting device.
  • FIGURE 12 is a schematic illustration of a system using a light funnel to collect light from a weak light source.
  • percent, "parts of,” and ratio values are by weight; the description of a group or class of materials as suitable or preferred for a given purpose in connection with the invention implies that mixtures of any two or more of the members of the group or class are equally suitable or preferred; description of constituents in chemical terms refers to the constituents at the time of addition to any combination specified in the description, and does not necessarily preclude chemical interactions among the constituents of a mixture once mixed; the first definition of an acronym or other abbreviation applies to all subsequent uses herein of the same abbreviation; and, unless expressly stated to the contrary, measurement of a property is determined by the same technique as previously or later referenced for the same property.
  • FIG. 1A a schematic illustration of a light is provided.
  • the light funnel of the present embodiment operates as a light concentrator (collector) or spreader depending on which side light is incident on.
  • Figure IA is a cross sectional view of the light funnel.
  • Figure IB is a top view of the light funnel.
  • Light funnel 10 includes transparent article 12 and reflecting layer 14.
  • Transparent article 12 includes a first base surface 16, second base surface 18, and a peripheral surface 20.
  • transparent article 12 is made from a transparent dielectric material. Suitable materials for article 12 include, but are not limited to, glass and plastics (e.g., polycarbonate, acrylic).
  • the first base surface 16 has a first surface area and the second base surface 18 has a second surface area wherein the first surface area is greater than the second surface area.
  • Reflecting layer 14 is disposed over peripheral surface 20.
  • reflecting layer 14 reflects at least a portion of the incident light (e.g., visible light, near infrared light).
  • reflecting layer 14 typically includes a reflective metallic layer (e.g., silver, aluminum, etc).
  • First base surface 16 and second base surface 18 may be of arbitrary shape (circular, hexagonal, square, etc.).
  • first base surface 16 is substantially circular characterized by a diameter di and second base surface 18 is substantially circular characterized by a diameter d 2 (e.g., di and d 2 are each independently between about 2 microns and 1 meter or more).
  • Light funnel 10 is also defined by height hi (e.g., hi is between about 2 microns and 1 meter or more).
  • peripheral surface 20 is describable by a section of a hyperbola as illustrated in Figure IA.
  • the light funnel 10 either concentrates or spreads out incident light. If light is incident from side 22, the light is concentrated when it emerges at side 24. If light is incident from side 24, the light is spread out as it emerges at side
  • reflecting layer 14 includes a plurality of layers.
  • reflecting layer 14 includes layers 26, 28, 30.
  • schematic illustrations demonstrate variations for coupling the light funnels to a photoactive device.
  • photoactive device 42 is substantially planar.
  • second base surface 18 is curved as is photoactive device 44. This coupling of curved surfaces allows effective coupling of light emerging from second base surface 18.
  • the photoactive device is a photovoltaic cell and the incident light collected is solar radiation.
  • FIGS. 4A and 4B schematic diagrams illustrating a procedure for optimizing the shape of the light funnels set forth above are provided.
  • the paths of the reflected light rays are iteratively determined as set forth below until the light either emerges from second base surface 18 or is reflected out through first base surface 16.
  • peripheral surface 20 is describable by a hyperbola in cross section.
  • the hyperbolae are characterized by foci 62 and 64.
  • Light ray 56 is incident on first base surface 16 with angle of incidence Al and angle of refraction A2.
  • Refracted light ray 58 travels within transparent article 12.
  • Al is less than A2 because the dielectric constant of transparent article 12 is greater than 1.
  • the resultant path of light ray 58 is determined by reference to foci 62, 64.
  • Ellipse 60 is constructed with reference to foci 62, 64.
  • the parameters defining the ellipse are set such that the extension 66 of light ray 58 is tangent to the ellipse at point 68.
  • Light ray 58 is incident on reflecting layer 14 at point 70.
  • Reflected ray 72 is incident on reflecting layer 14 at position 80.
  • the path of reflected ray 72 is determined by reference to the same ellipse 60. Specifically, the path of reflected ray 72 is such that extension 74 of reflected ray 72 is tangent to a point 76 on the ellipse. There is only one such point that can meet this criterion.
  • FIG. 5 a schematic illustration demonstrating that a light ray falling between the foci of the modeling ellipse cannot be modeled by the procedure of Figures 4A and 4B is provided.
  • Light ray 86 is incident on first base surface 16.
  • Refracted light ray 88 impinges upon reflecting layer 14.
  • Extension 90 of refracted light ray 88 is not tangent to any ellipse having foci 62, 64. Therefore, the methods of Figures 4A and 4B are not applicable to this case.
  • FIG. 6 a schematic illustration of a procedure for optimizing the shape of the light funnels taking into consideration the situation of Figure 5 is provided.
  • model hyperbola 89 having branches 90, 92 is used.
  • Focal point 62 is associated with branch 90 while focal point 64 is associated with branch 92.
  • Light ray 94 is incident on base surface 14.
  • Refracted ray 96 impinges on reflecting surface 14 at position 98.
  • Extension 100 of refracted light ray 96 is tangent to branch 92.
  • Reflected ray 102 is reflected in a direction such that extension 104 of light ray 102 is tangent to branch 90.
  • Branch 90 is a mirror image of branch 90. This process continues as above until light is either reflected or transmitted from light funnel 10.
  • Figure 7 a principle cross-section of the family of confocal ellipses and hyperbolae is provided.
  • Figure 7 allows visualization of the ellipses and hyperbolae that are involved in designing the light funnels of Figures 1-2.
  • the methods associated with Figures 4-7 allow these light funnels to be designed with a predetermined acceptance angle and concentration properties.
  • concentration of light will depend on the ratio of the area of base surface 14 to base surface 16.
  • the equation for a hyperbola is:
  • a is related to focal points 62, 64 and b is a number related to the shape of the hyperbola.
  • focal point 62 can be expressed in Cartesian coordinates as (a,0) and focal point 64 as (-a,0).
  • a light funnel is constructed by specifying a desired acceptance angle and concentration. The methods associated with Figures 3-5 are used to determine a, b, the height of the light funnel and the positions of base surface 14 and base surface 16 relative to the hyperbola.
  • Figure 8A provides a plot of the input solar energy as a function of time.
  • Figure 8 A a cross-section of the solar collector 106 used in the simulation is overlaid onto the plot as well as the effective target size 108.
  • the solar collector 106 is oriented towards the sun's zenith.
  • Figure 8B provides plots depicting the profile of energy collected as function of time (in hours relative to zenith) for three different stationary collectors.
  • the simulations of Figures 8 A and 8B were performed using Mathematica commercially available from Wolfram Research located in Champaign, Illinois. The top curve is for a flat panel solar cell of radius 0.86.
  • the middle curve is for a concentrated solar cell of the present invention of radius 0.17.
  • the dimensions provided are relative.
  • the bottom curve is for a concentrated solar cell of conventionally focusing means of radius 0.17.
  • the concentration ratio is 25.4.
  • the flat panel solar cell is set to have the same effective area.
  • the energy collected by the solar collector of the present invention is 2.05 kilowatt-hour while the energy collected by the conventionally concentrated solar cell of the same area as used in this invention is 0.27 kilowatt- hour.
  • the energy collected by the flat panel solar cell is 7.64 kilowatt-hour. It should be appreciated that these energy collection estimates are for a one-day period with a clear sky and an area of 1 meter squared.
  • the collected solar energy does not take into consideration the efficiency of the solar cell.
  • the present invention shows considerable improvement over the conventionally concentrated solar cell.
  • the radius of the image of the solar cell as seen from the sun is 1
  • the radius of the opening of the cell is 0.86
  • the radius of the solar cell is 0.17.
  • FIG. 9A a schematic illustration of a near monolithic light concentrator/spreader including a plurality of light funnels is provided.
  • Figure 9A is a cross section of the light concentrator/spreader while Figure 9B is a top view.
  • Light concentrator/spreader 110 includes a plurality of light funnels 112.
  • Light funnels 112 are of the general design set forth above in Figures 1-7.
  • the regions 114 between light funnels 112 are filled with a material to provide structural support.
  • this material is the same material as used for transparent article 12 set forth above.
  • the structure of light concentrator/spreader 110 is nearly monolithic since it is equivalent to a monolithic slab with a series of embedded thin reflecting layers.
  • This design provides significant mechanical strength allowing the light concentrator/spreader to be integrated into roofs.
  • light funnels 112 are packed to provide the highest density of such collectors.
  • 2-dimensional packing of the solar collectors is flexible. For example, a rectangular array could have been used instead of hexagonal, resulting in a less dense packing.
  • the first base surface (item 12 in Figure IB) could be shaped hexagonally, to eliminate the "dead zone" between adjacent cells to further improve the light collecting efficiency.
  • the present embodiment provides an array of light funnels.
  • the dimensional scale of this array and the light funnels therein is completely unrestricted except by the length of the wavelength of light.
  • the dimensions of the light funnels are greater than the wavelength of light, which is of the order of a micron. If the size of a single funnel is sub- millimeter, then its enabling technology must be akin to that semi-conductor.
  • a candidate for the main material of the funnels, optical quality polymer is very similar to polymers widely used in semi-conductor devices. Therefore, there are many areas this invention can be used in semi-conductor applications.
  • Imaging device 120 includes a plurality of photoactive elements 122. Typically, the photoactive elements each define a pixel in the imaging device.
  • Light concentrator/diffuser 124 is positioned adjacent to imaging device 120 such that the photoactive elements are aligned to receive light from the plurality of light funnels 126 through second base surface 18.
  • Light funnels 126 are of the design set forth above in Figures IA and IB. If the pixel sized light funnels 126 are positioned over the photocells, one funnel per pixel, then all the light that falls on one pixel can be concentrated to a much smaller photocell, leaving more surfaces for circuitry in the imaging device 120.
  • imaging device 120 is a CMOS imaging device.
  • photoactive elements 122 may be either silicon based photocells or GaAs photocells.
  • Light emitting device 130 includes a plurality of light emitting elements 132.
  • Light concentrator/diffuser 124 is positioned adjacent to light emitting device 130 such that the light emitting elements 132 are aligned to introduce light into the plurality of light funnels 126 through first base surface 16.
  • Light funnels 126 are of the design set forth above in Figures IA and IB.
  • the light concentrator/diffuser 124 functions as a light spreader.
  • light emitting elements 132 are light emitting diodes (LED).
  • the light funnels direct most of the light into the forward direction in a controllable solid angle, making the dies appear to be a uniform source.
  • Light funnels would not only make the LED dies appear to be a uniform source but also waste less light in unwanted directions. The end result is less power consumption and reduced working temperature. Moreover, since the light funnel works more efficiently, fewer LED's can be used, saving more power.
  • FIG. 12 a schematic illustration of the application of a light funnel to the collection of a weak optical signal is provided.
  • Weak light source 140 emits a weak light signal that is collected and concentrated by light funnel 142 onto photo-detector 144.
  • Light funnel 142 is of the design set forth above in Figures IA and IB.
  • the light funnel is based on non-imaging optics which is very useful in a photo-detector used in collecting the very weak and diffuse fluorescent light produced by biological samples under light stimulation.
  • the demands for high sensibility and short response time create a dilemma in the choice of the detector area. To increase the sensitivity, a large detector area is desirable.
  • the non-imaging light collector of the present embodiment solves this problem without sacrificing field of view.

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Abstract

La présente invention concerne un anamorphoseur de lumière qui comprend un article transparent présentant une première surface de base, une seconde surface de base et une surface périphérique. La première surface de base est caractérisée par une première surface spécifique et la seconde surface de base est caractérisée par une seconde surface spécifique, la première surface spécifique étant supérieure à la seconde surface spécifique. L'anamorphoseur de lumière comprend en outre un revêtement réfléchissant disposé sur la couche périphérique.
PCT/US2010/039329 2009-06-20 2010-06-21 Anamorphoseur de lumière WO2010148389A2 (fr)

Applications Claiming Priority (2)

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US21893509P 2009-06-20 2009-06-20
US61/218,935 2009-06-20

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WO2010148389A2 true WO2010148389A2 (fr) 2010-12-23
WO2010148389A3 WO2010148389A3 (fr) 2011-04-14

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Cited By (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO2013003120A3 (fr) * 2011-06-30 2013-06-13 Qualcomm Mems Technologies, Inc. Collecte de lumière dans des systèmes photovoltaïques
WO2013093487A3 (fr) * 2011-12-21 2013-08-22 Heriot-Watt University Concentrateur optique et dispositifs photovoltaïques associés
EP2804040A3 (fr) * 2013-05-17 2015-02-25 Karl Storz GmbH & Co. KG Dispositif de concentration de rayons pour un dispositif de sources lumineuse
CN110672201A (zh) * 2019-09-30 2020-01-10 长江大学 一种基于曲面聚光的光电传感检测装置

Citations (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
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