WO2008110796A1 - Beacons and other light-emitting units - Google Patents

Beacons and other light-emitting units Download PDF

Info

Publication number
WO2008110796A1
WO2008110796A1 PCT/GB2008/000865 GB2008000865W WO2008110796A1 WO 2008110796 A1 WO2008110796 A1 WO 2008110796A1 GB 2008000865 W GB2008000865 W GB 2008000865W WO 2008110796 A1 WO2008110796 A1 WO 2008110796A1
Authority
WO
WIPO (PCT)
Prior art keywords
light
lens
beacon
reflector
emitting
Prior art date
Application number
PCT/GB2008/000865
Other languages
French (fr)
Inventor
George Heftman
Original Assignee
Nicotech Limited
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 Nicotech Limited filed Critical Nicotech Limited
Publication of WO2008110796A1 publication Critical patent/WO2008110796A1/en

Links

Classifications

    • FMECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F21LIGHTING
    • F21VFUNCTIONAL FEATURES OR DETAILS OF LIGHTING DEVICES OR SYSTEMS THEREOF; STRUCTURAL COMBINATIONS OF LIGHTING DEVICES WITH OTHER ARTICLES, NOT OTHERWISE PROVIDED FOR
    • F21V5/00Refractors for light sources
    • F21V5/04Refractors for light sources of lens shape
    • F21V5/045Refractors for light sources of lens shape the lens having discontinuous faces, e.g. Fresnel lenses
    • BPERFORMING OPERATIONS; TRANSPORTING
    • B60VEHICLES IN GENERAL
    • B60QARRANGEMENT OF SIGNALLING OR LIGHTING DEVICES, THE MOUNTING OR SUPPORTING THEREOF OR CIRCUITS THEREFOR, FOR VEHICLES IN GENERAL
    • B60Q1/00Arrangement of optical signalling or lighting devices, the mounting or supporting thereof or circuits therefor
    • B60Q1/26Arrangement of optical signalling or lighting devices, the mounting or supporting thereof or circuits therefor the devices being primarily intended to indicate the vehicle, or parts thereof, or to give signals, to other traffic
    • B60Q1/2611Indicating devices mounted on the roof of the vehicle
    • BPERFORMING OPERATIONS; TRANSPORTING
    • B60VEHICLES IN GENERAL
    • B60QARRANGEMENT OF SIGNALLING OR LIGHTING DEVICES, THE MOUNTING OR SUPPORTING THEREOF OR CIRCUITS THEREFOR, FOR VEHICLES IN GENERAL
    • B60Q1/00Arrangement of optical signalling or lighting devices, the mounting or supporting thereof or circuits therefor
    • B60Q1/26Arrangement of optical signalling or lighting devices, the mounting or supporting thereof or circuits therefor the devices being primarily intended to indicate the vehicle, or parts thereof, or to give signals, to other traffic
    • B60Q1/2696Mounting of devices using LEDs
    • BPERFORMING OPERATIONS; TRANSPORTING
    • B60VEHICLES IN GENERAL
    • B60QARRANGEMENT OF SIGNALLING OR LIGHTING DEVICES, THE MOUNTING OR SUPPORTING THEREOF OR CIRCUITS THEREFOR, FOR VEHICLES IN GENERAL
    • B60Q1/00Arrangement of optical signalling or lighting devices, the mounting or supporting thereof or circuits therefor
    • B60Q1/26Arrangement of optical signalling or lighting devices, the mounting or supporting thereof or circuits therefor the devices being primarily intended to indicate the vehicle, or parts thereof, or to give signals, to other traffic
    • B60Q1/46Arrangement of optical signalling or lighting devices, the mounting or supporting thereof or circuits therefor the devices being primarily intended to indicate the vehicle, or parts thereof, or to give signals, to other traffic for giving flashing caution signals during drive, other than signalling change of direction, e.g. flashing the headlights or hazard lights
    • FMECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F21LIGHTING
    • F21VFUNCTIONAL FEATURES OR DETAILS OF LIGHTING DEVICES OR SYSTEMS THEREOF; STRUCTURAL COMBINATIONS OF LIGHTING DEVICES WITH OTHER ARTICLES, NOT OTHERWISE PROVIDED FOR
    • F21V13/00Producing particular characteristics or distribution of the light emitted by means of a combination of elements specified in two or more of main groups F21V1/00 - F21V11/00
    • F21V13/02Combinations of only two kinds of elements
    • F21V13/04Combinations of only two kinds of elements the elements being reflectors and refractors
    • FMECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F21LIGHTING
    • F21VFUNCTIONAL FEATURES OR DETAILS OF LIGHTING DEVICES OR SYSTEMS THEREOF; STRUCTURAL COMBINATIONS OF LIGHTING DEVICES WITH OTHER ARTICLES, NOT OTHERWISE PROVIDED FOR
    • F21V5/00Refractors for light sources
    • F21V5/04Refractors for light sources of lens shape
    • F21V5/046Refractors for light sources of lens shape the lens having a rotationally symmetrical shape about an axis for transmitting light in a direction mainly perpendicular to this axis, e.g. ring or annular lens with light source disposed inside the ring
    • FMECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F21LIGHTING
    • F21VFUNCTIONAL FEATURES OR DETAILS OF LIGHTING DEVICES OR SYSTEMS THEREOF; STRUCTURAL COMBINATIONS OF LIGHTING DEVICES WITH OTHER ARTICLES, NOT OTHERWISE PROVIDED FOR
    • F21V7/00Reflectors for light sources
    • F21V7/04Optical design
    • FMECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F21LIGHTING
    • F21WINDEXING SCHEME ASSOCIATED WITH SUBCLASSES F21K, F21L, F21S and F21V, RELATING TO USES OR APPLICATIONS OF LIGHTING DEVICES OR SYSTEMS
    • F21W2111/00Use or application of lighting devices or systems for signalling, marking or indicating, not provided for in codes F21W2102/00 – F21W2107/00
    • FMECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F21LIGHTING
    • F21YINDEXING 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
    • F21Y2115/00Light-generating elements of semiconductor light sources
    • F21Y2115/10Light-emitting diodes [LED]

Definitions

  • This invention relates to beacons and other light-emitting units .
  • the invention is concerned with beacons and other light-emitting units for providing substantially uniform distribution of light about a defined axis.
  • a beacon or other light-emitting unit wherein light-emitting means is located within a substantially-cylindrical Fresnel lens, and a substantially-conical reflector is mounted at one end of the lens with its axis collinear with the longitudinal axis of the lens and its vertex towards the light-emitting means such that light emitted by the light-emitting means is distributed about the axis of the lens by refraction through the lens and is augmented by reflection from the reflector of other light emitted by the light-emitting means.
  • the light-emitting means may be located within the other end of the lens , and the lens may increase in internal diameter towards said one end.
  • the lens may be of smoothly increasing internal diameter towards said one end.
  • the cone-angle of the reflector may increase, in particular it may increase smoothly, away from its vertex.
  • the combination of the lens and reflector in the beacon or other light-emitting unit of the invention readily results in efficiency in the utilisation and distribution of the light emitted by the light-emitting means, and allows reduction in size and cost of the optical system. More particularly, the efficiency in utilisation of available light for distribution about the axis of the lens may be such as to enable the function of a high-intensity flashing beacon to be achieved using a single, or just a few, light-emitting diodes (LEDs) as the light-emitting means.
  • LEDs light-emitting diodes
  • Figures 1 and 2 are a perspective view and a plan respectively, of the beacon of the invention
  • Figure 3 is a side elevation of the beacon showing internal components of the beacon in broken outline
  • Figure 4 is a plan view of the beacon with its domed, transparent cover removed;
  • Figure 5 is a sectional elevation of the beacon, the section being taken on the line V-V of Figure 4.
  • Figure 6 is illustrative to an enlarged scale of a modification of the beacon.
  • the beacon to be described is suitable for mounting on an emergency or other service vehicle to emit high-intensity flashes of light throughout 360 degrees in azimuth.
  • the invention is not limited to this specific application but may be used in other contexts for beacons and other light- emitting units.
  • the beacon in this case has a circular base 1 for mounting flat on a substantially horizontal surface (for example on the roof or other part of a vehicle), and is fitted with a transparent, domed cover 2 upstanding from the base 1 (the cover 2 may be translucent rather than transparent) .
  • the cover 2 which is a polycarbonate moulding, has a cylindrical wall 3 that is ribbed lengthwise throughout its circumference for diffusing the light output of the beacon. The light output of the beacon is distributed evenly throughout the full 360-degree circumference of the wall 3.
  • the source of the light output of the beacon is a single, high-intensity LED 4 that is carried by a circular, printed-circuit board 5 mounted on the base 1 coaxially within the cover 2.
  • the printed-circuit board 5, which incorporates electrical circuitry for energising the LED 4, carries a substantially-cylindrical Fresnel lens 6 that stands upright centrally of the board 5 with the LED 4 upstanding from the centre of the board 5 within the lower end of the lens 6.
  • Part of the light emitted by the LED 4 is incident on the inside surface of the Fresnel lens 6 for refraction through the lens 6 for distribution via the cover 2 throughout 360 degrees in azimuth at the desired viewing angle in elevation.
  • the light from the LED 4 that is not refracted by the lens 6 is reflected from the reflective external surface of an inverted substantially-conical reflector 7.
  • the reflector 7 is mounted inverted on the inside of the cover 2 to have its axis collinear with that of the cylindrical lens 6 and its vertex 8 at the upper end of the lens 6.
  • the light that escapes refraction by the lens 6 is in this way collected by reflection for distribution throughout 360 degrees in azimuth to augment the refracted light within the desired elevation-angle, and thereby add to the light output through the cover 2.
  • the lens 6 is shaped to be of smoothly increasing internal diameter towards its upper end, and the reflector 7 is shaped to be of a smoothly increasing cone- angle away from the vertex 8.
  • the colour of the light emitted by the beacon for its warning or other role may result from appropriate tinting of the cover 2, or simply from the colour of the light emitted by the LED 4 utilised.
  • the light intensity produced by the beacon can be increased by using more than one LED.
  • four LEDs 14 may be used in a square array within the lower end of the Fresnel lens 6.

Abstract

A flashing beacon having a transparent, domed cover (2) has an LED (4) as light source mounted upstanding coaxially within the lower end of an upright cylindrical Fresnel lens (6) that by refraction distributes light emitted by the LED throughout 360 degrees in azimuth with a limited viewing angle in elevation. The lens (6) has a smoothly increasing internal diameter towards its upper end, and a conical reflector (7) is mounted inverted on the inside of the cover (2) axially collinear with the lens (6) and with its vertex (8) at the upper end of the lens (6). The reflector (7) reflects light from the LED (4) not refracted by the lens (6) to augment the refracted light within the elevation angle, and has a smoothly increasing cone-angle away from its vertex (8). In a modification, the single LED (4) is replaced by four LEDs (14) in square array.

Description

Beacons and other Light-Emitting Units
This invention relates to beacons and other light-emitting units .
The invention is concerned with beacons and other light-emitting units for providing substantially uniform distribution of light about a defined axis.
According to the present invention there is provided a beacon or other light-emitting unit, wherein light-emitting means is located within a substantially-cylindrical Fresnel lens, and a substantially-conical reflector is mounted at one end of the lens with its axis collinear with the longitudinal axis of the lens and its vertex towards the light-emitting means such that light emitted by the light-emitting means is distributed about the axis of the lens by refraction through the lens and is augmented by reflection from the reflector of other light emitted by the light-emitting means.
The light-emitting means may be located within the other end of the lens , and the lens may increase in internal diameter towards said one end. In particular, the lens may be of smoothly increasing internal diameter towards said one end.
The cone-angle of the reflector may increase, in particular it may increase smoothly, away from its vertex.
The combination of the lens and reflector in the beacon or other light-emitting unit of the invention readily results in efficiency in the utilisation and distribution of the light emitted by the light-emitting means, and allows reduction in size and cost of the optical system. More particularly, the efficiency in utilisation of available light for distribution about the axis of the lens may be such as to enable the function of a high-intensity flashing beacon to be achieved using a single, or just a few, light-emitting diodes (LEDs) as the light-emitting means.
A beacon according to the invention will now be described, by way of example, with reference to the accompanying drawings, in which:
Figures 1 and 2 are a perspective view and a plan respectively, of the beacon of the invention;
Figure 3 is a side elevation of the beacon showing internal components of the beacon in broken outline;
Figure 4 is a plan view of the beacon with its domed, transparent cover removed;
Figure 5 is a sectional elevation of the beacon, the section being taken on the line V-V of Figure 4; and
Figure 6 is illustrative to an enlarged scale of a modification of the beacon.
The beacon to be described is suitable for mounting on an emergency or other service vehicle to emit high-intensity flashes of light throughout 360 degrees in azimuth. The invention, however, is not limited to this specific application but may be used in other contexts for beacons and other light- emitting units.
Referring to Figures 1 to 3 , the beacon in this case has a circular base 1 for mounting flat on a substantially horizontal surface (for example on the roof or other part of a vehicle), and is fitted with a transparent, domed cover 2 upstanding from the base 1 (the cover 2 may be translucent rather than transparent) . The cover 2, which is a polycarbonate moulding, has a cylindrical wall 3 that is ribbed lengthwise throughout its circumference for diffusing the light output of the beacon. The light output of the beacon is distributed evenly throughout the full 360-degree circumference of the wall 3.
Referring now also to Figures 4 and 5, the source of the light output of the beacon is a single, high-intensity LED 4 that is carried by a circular, printed-circuit board 5 mounted on the base 1 coaxially within the cover 2. The printed-circuit board 5, which incorporates electrical circuitry for energising the LED 4, carries a substantially-cylindrical Fresnel lens 6 that stands upright centrally of the board 5 with the LED 4 upstanding from the centre of the board 5 within the lower end of the lens 6.
Part of the light emitted by the LED 4 is incident on the inside surface of the Fresnel lens 6 for refraction through the lens 6 for distribution via the cover 2 throughout 360 degrees in azimuth at the desired viewing angle in elevation. The light from the LED 4 that is not refracted by the lens 6 is reflected from the reflective external surface of an inverted substantially-conical reflector 7. The reflector 7 is mounted inverted on the inside of the cover 2 to have its axis collinear with that of the cylindrical lens 6 and its vertex 8 at the upper end of the lens 6. The light that escapes refraction by the lens 6 is in this way collected by reflection for distribution throughout 360 degrees in azimuth to augment the refracted light within the desired elevation-angle, and thereby add to the light output through the cover 2.
As seen most clearly in Figure 5, the lens 6 is shaped to be of smoothly increasing internal diameter towards its upper end, and the reflector 7 is shaped to be of a smoothly increasing cone- angle away from the vertex 8. These increases are adopted for the purpose of improving the optical characteristics of the beacon as regards its light output and viewing angle throughout its full circumference.
The colour of the light emitted by the beacon for its warning or other role, may result from appropriate tinting of the cover 2, or simply from the colour of the light emitted by the LED 4 utilised.
The light intensity produced by the beacon can be increased by using more than one LED. In this regard, and as illustrated by Figure 6, four LEDs 14 may be used in a square array within the lower end of the Fresnel lens 6.

Claims

Claims :
1. A beacon or other light-emitting unit, wherein light- emitting means is located within a substantially-cylindrical Fresnel lens, and a substantially-conical reflector is mounted at one end of the lens with its axis collinear with the longitudinal axis of the lens and its vertex towards the light- emitting means such that light emitted by the light-emitting means is distributed about the axis of the lens by refraction through the lens and is augmented by reflection from the reflector of other light emitted by the light-emitting means.
2. A beacon or other light-emitting unit according to Claim 1 wherein the light-emitting means is located within the other end of the lens.
3. A beacon or other light-emitting unit according to Claim 1 or Claim 2 wherein the lens increases in internal diameter towards said one end.
4. A beacon or other light-emitting unit according to Claim 3 wherein the lens is of smoothly increasing internal diameter towards said one end.
5. A beacon or other light-emitting unit according to any one of Claims 1 to 4 wherein the cone-angle of the reflector increases away from its vertex.
6. A beacon or other light-emitting unit according to Claim 5 wherein the reflector is of smoothly increasing cone-angle away from its vertex.
7. A beacon or other light-emitting unit according to any one of Claims 1 to 6 wherein light emitted by the light-emitting means is distributed by refraction through the lens throughout 360 degrees about the longitudinal axis of the lens.
8. A beacon or other light-emitting unit according to Claim 7 wherein light from the light-emitting means not refracted by the lens is reflected by the reflector to augment the refracted light about the longitudinal axis of the lens.
9. A beacon or other light-emitting unit according to any one of Claims 1 to 8 wherein the light-emitting means is one or more light-emitting diodes.
10. A beacon or other light-emitting unit according to any one of Claims 1 to 9 wherein the unit has a transparent or translucent cover for enclosing the light-emitting means, the lens and the reflector.
11. A beacon or other light-emitting unit according to Claim
10 wherein the light-emitting means and the lens are mounted on a base of the unit, the reflector is carried by the cover, and the cover is fitted to the base to enclose the light-emitting means and the lens and locate the reflector with its vertex towards the light-emitting means.
12. A beacon or other light-emitting unit according to Claim
11 wherein the cover is ribbed to diffuse light emitted by the unit .
PCT/GB2008/000865 2007-03-12 2008-03-12 Beacons and other light-emitting units WO2008110796A1 (en)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
GB0704681.6 2007-03-12
GBGB0704681.6A GB0704681D0 (en) 2007-03-12 2007-03-12 Beacons and other light-emitting units

Publications (1)

Publication Number Publication Date
WO2008110796A1 true WO2008110796A1 (en) 2008-09-18

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Family Applications (1)

Application Number Title Priority Date Filing Date
PCT/GB2008/000865 WO2008110796A1 (en) 2007-03-12 2008-03-12 Beacons and other light-emitting units

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GB (2) GB0704681D0 (en)
WO (1) WO2008110796A1 (en)

Cited By (7)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN102853287A (en) * 2011-06-30 2013-01-02 隆达电子股份有限公司 Lamp structure
ITBS20120051A1 (en) * 2012-04-04 2013-10-05 Targetti Sankey Spa LIGHTING APPLIANCE
CN103851367A (en) * 2012-12-01 2014-06-11 欧普照明股份有限公司 Light source
US20150009679A1 (en) * 2012-02-10 2015-01-08 Enplas Corporation Beam-control member and illumination device
EP2866214A1 (en) * 2013-10-23 2015-04-29 Honeywell International Inc. Multiple led omni-directional visual alarm device
GR20150100277A (en) * 2015-06-16 2017-01-31 Ιωαννης-Πετρος Αγαπητου Ζαγορας Preset wide-range single-led beacon system with high luminosity of visible or invisible wavelength
CN104566109B (en) * 2013-10-24 2017-08-25 株式会社小糸制作所 Light fixture and its assemble method

Families Citing this family (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US20120188075A1 (en) * 2011-01-24 2012-07-26 Klusmeier Ii Conrad P Remotely activated exterior intermittent alert lighting system
EP2505430A3 (en) * 2011-03-29 2018-04-11 Intav S.R.L. Lighting device, in particular light signaling supplementary device for rescue and emergency prioritary vehicles, heavy transports and vehicles, work machinery
BR202015003430Y1 (en) * 2015-02-13 2020-05-19 Balbinot Mauricio constructive arrangement in intermittent lighting equipment applied to special vehicles
DE102017103253A1 (en) * 2017-02-16 2018-08-16 AREV Lighting GmbH Luminaire comprising a lens having a plurality of webs

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US3731082A (en) * 1970-09-30 1973-05-01 Lectric Lites Co Emergency warning light apparatus
GB2267332A (en) * 1992-05-28 1993-12-01 Glasdon Ltd Lens for a road danger lamp
US5608290A (en) * 1995-01-26 1997-03-04 Dominion Automotive Group, Inc. LED flashing lantern

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US3253138A (en) * 1963-06-06 1966-05-24 Elastic Stop Nut Corp Light structure
GB2122394A (en) * 1982-06-22 1984-01-11 Dennis W Ruediger Channel marker
US6679621B2 (en) * 2002-06-24 2004-01-20 Lumileds Lighting U.S., Llc Side emitting LED and lens

Patent Citations (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3731082A (en) * 1970-09-30 1973-05-01 Lectric Lites Co Emergency warning light apparatus
GB2267332A (en) * 1992-05-28 1993-12-01 Glasdon Ltd Lens for a road danger lamp
US5608290A (en) * 1995-01-26 1997-03-04 Dominion Automotive Group, Inc. LED flashing lantern

Cited By (9)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN102853287A (en) * 2011-06-30 2013-01-02 隆达电子股份有限公司 Lamp structure
US20150009679A1 (en) * 2012-02-10 2015-01-08 Enplas Corporation Beam-control member and illumination device
US9863614B2 (en) * 2012-02-10 2018-01-09 Enplas Corporation Beam-control member and illumination device
ITBS20120051A1 (en) * 2012-04-04 2013-10-05 Targetti Sankey Spa LIGHTING APPLIANCE
CN103851367A (en) * 2012-12-01 2014-06-11 欧普照明股份有限公司 Light source
EP2866214A1 (en) * 2013-10-23 2015-04-29 Honeywell International Inc. Multiple led omni-directional visual alarm device
US9251675B2 (en) 2013-10-23 2016-02-02 Honeywell International Inc. Multiple LED omni-directional visual alarm device
CN104566109B (en) * 2013-10-24 2017-08-25 株式会社小糸制作所 Light fixture and its assemble method
GR20150100277A (en) * 2015-06-16 2017-01-31 Ιωαννης-Πετρος Αγαπητου Ζαγορας Preset wide-range single-led beacon system with high luminosity of visible or invisible wavelength

Also Published As

Publication number Publication date
GB0704681D0 (en) 2007-04-18
GB0804634D0 (en) 2008-04-16
GB2447558A (en) 2008-09-17

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