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GB2447558A - Light emitting beacon - Google Patents

Light emitting beacon Download PDF

Info

Publication number
GB2447558A
GB2447558A GB0804634A GB0804634A GB2447558A GB 2447558 A GB2447558 A GB 2447558A GB 0804634 A GB0804634 A GB 0804634A GB 0804634 A GB0804634 A GB 0804634A GB 2447558 A GB2447558 A GB 2447558A
Authority
GB
United Kingdom
Prior art keywords
light
lens
beacon
reflector
emitting
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Withdrawn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
GB0804634A
Other versions
GB0804634D0 (en
Inventor
George Heftman
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.)
Nicotech Ltd
Original Assignee
Nicotech Ltd
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 Ltd filed Critical Nicotech Ltd
Publication of GB0804634D0 publication Critical patent/GB0804634D0/en
Publication of GB2447558A publication Critical patent/GB2447558A/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Withdrawn legal-status Critical Current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
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B60—VEHICLES IN GENERAL
    • B60Q—ARRANGEMENT OF SIGNALLING OR LIGHTING DEVICES, THE MOUNTING OR SUPPORTING THEREOF OR CIRCUITS THEREFOR, FOR VEHICLES IN GENERAL
    • B60Q1/00—Arrangement of optical signalling or lighting devices, the mounting or supporting thereof or circuits therefor
    • B60Q1/26—Arrangement 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
    • B60Q1/46—Arrangement 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
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B60—VEHICLES IN GENERAL
    • B60Q—ARRANGEMENT OF SIGNALLING OR LIGHTING DEVICES, THE MOUNTING OR SUPPORTING THEREOF OR CIRCUITS THEREFOR, FOR VEHICLES IN GENERAL
    • B60Q1/00—Arrangement of optical signalling or lighting devices, the mounting or supporting thereof or circuits therefor
    • B60Q1/26—Arrangement 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
    • B60Q1/2611—Indicating devices mounted on the roof of the vehicle
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B60—VEHICLES IN GENERAL
    • B60Q—ARRANGEMENT OF SIGNALLING OR LIGHTING DEVICES, THE MOUNTING OR SUPPORTING THEREOF OR CIRCUITS THEREFOR, FOR VEHICLES IN GENERAL
    • B60Q1/00—Arrangement of optical signalling or lighting devices, the mounting or supporting thereof or circuits therefor
    • B60Q1/26—Arrangement 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
    • B60Q1/2696—Mounting of devices using LEDs
    • 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
    • F21V13/00—Producing 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
    • F21V13/02—Combinations of only two kinds of elements
    • F21V13/04—Combinations of only two kinds of elements the elements being reflectors and refractors
    • 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
    • F21V5/046—Refractors 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
    • 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
    • F21V7/04—Optical design
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F21—LIGHTING
    • F21W—INDEXING SCHEME ASSOCIATED WITH SUBCLASSES F21K, F21L, F21S and F21V, RELATING TO USES OR APPLICATIONS OF LIGHTING DEVICES OR SYSTEMS
    • F21W2111/00—Use or application of lighting devices or systems for signalling, marking or indicating, not provided for in codes F21W2102/00 – F21W2107/00
    • 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

  • Engineering & Computer Science (AREA)
  • General Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Non-Portable Lighting Devices Or Systems Thereof (AREA)

Abstract

A beacon comprises a light source such as LED 4 inside a cylindrical fresnel lens 6 and a conical reflector 7 facing the LED so that emitted light is distributed about their common axis in azimuth and the reflected light augments that refracted by the lens. Lens 6 can increase in diameter smoothly away from the light source and the cone angle of reflector 7 can increase smoothly away fro its vertex 8. The beacon can comprise a transparent, coloured or translucent cover 2 having ribs. Cover 2 encloses the lens, reflector and light source, which can be four LEDs (fig 6,14) in an array. The beacon may flash and be used on an emergency or service vehicle.

Description

* 2447558 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 mns may he 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 ber.n.
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 substant11ly-ccniccl reflector 7. The iefleetor 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 (14)

  1. 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. 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. 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. 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. 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. 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. 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. 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. 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. 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. 11. A beacon or other light-emitting unit according to Claim 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 fittcd to the base to eniose the liyhb-emitting means and the lens and locate the reflector with its vertex towards the light-emitting means.
  12. 12. A beacon or other light-emitting unit according to Claim 11 wherein the cover is ribbed to diffuse light emitted by the unit.
  13. 13. A beacon substantially as hereinbefore described with reference to Figures 1 to 5 of the accompanying drawings.
  14. 14. A beacon according to Claim 13 modified substantially as hereinbefore described with reference to Figure 6 of the accompanying drawings.
GB0804634A 2007-03-12 2008-03-12 Light emitting beacon Withdrawn GB2447558A (en)

Applications Claiming Priority (1)

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

Publications (2)

Publication Number Publication Date
GB0804634D0 GB0804634D0 (en) 2008-04-16
GB2447558A true GB2447558A (en) 2008-09-17

Family

ID=37988766

Family Applications (2)

Application Number Title Priority Date Filing Date
GBGB0704681.6A Ceased GB0704681D0 (en) 2007-03-12 2007-03-12 Beacons and other light-emitting units
GB0804634A Withdrawn GB2447558A (en) 2007-03-12 2008-03-12 Light emitting beacon

Family Applications Before (1)

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

Country Status (2)

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

Cited By (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
WO2016127238A1 (en) * 2015-02-13 2016-08-18 Balbinot Mauricio Structural arrangement in intermittent lighting devices for special vehicles
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
DE102017103253A1 (en) 2017-02-16 2018-08-16 AREV Lighting GmbH Luminaire comprising a lens having a plurality of webs

Families Citing this family (7)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
TWI410581B (en) * 2011-06-30 2013-10-01 Lextar Electronics Corp Lamp structure
JP5957340B2 (en) * 2012-02-10 2016-07-27 株式会社エンプラス Luminous flux control member and lighting device
ITBS20120051A1 (en) * 2012-04-04 2013-10-05 Targetti Sankey Spa LIGHTING APPLIANCE
CN103851367B (en) * 2012-12-01 2016-12-21 欧普照明股份有限公司 A kind of light source
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

Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
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
GB2267332A (en) * 1992-05-28 1993-12-01 Glasdon Ltd Lens for a road danger lamp
EP1376708A2 (en) * 2002-06-24 2004-01-02 Lumileds Lighting US, LLC Side emitting LED and lens

Family Cites Families (2)

* 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
US5608290A (en) * 1995-01-26 1997-03-04 Dominion Automotive Group, Inc. LED flashing lantern

Patent Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
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
GB2267332A (en) * 1992-05-28 1993-12-01 Glasdon Ltd Lens for a road danger lamp
EP1376708A2 (en) * 2002-06-24 2004-01-02 Lumileds Lighting US, LLC Side emitting LED and lens

Cited By (5)

* 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
WO2016127238A1 (en) * 2015-02-13 2016-08-18 Balbinot Mauricio Structural arrangement in intermittent lighting devices for special vehicles
DE102017103253A1 (en) 2017-02-16 2018-08-16 AREV Lighting GmbH Luminaire comprising a lens having a plurality of webs
WO2018149928A1 (en) * 2017-02-16 2018-08-23 AREV Lighting GmbH Luminaire comprising a lens having a plurality of webs

Also Published As

Publication number Publication date
GB0804634D0 (en) 2008-04-16
WO2008110796A1 (en) 2008-09-18
GB0704681D0 (en) 2007-04-18

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Legal Events

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