Light assembly for flashlights
First Claim
Patent Images
1. A nonimaging light assembly, comprising:
- a light source; and
a lens symmetrical about an optical axis, includinga first rear surface intersecting said optical axis for receiving a first portion of light emanating from said light source positioned along said optical axis,a second rear surface extending about said first rear surface for receiving a second portion of light emanating from said light source,a side surface for total-internally reflecting and substantially collimating light received by said second rear surface, anda front surface for exiting light reflected from said side surface and light received by said first rear surface;
said lens having an axisymmetric profile substantially described by sample points thereon defined by x,y-coordinate pairs set forth in FIGS. 17a and 17b, incorporated herein by reference, where x represents position along an x-coordinate along said optical axis and y represents position along a y-coordinate radially from said optical axis, the x and y positions of said sample points subject however to reasonable tolerances, for exiting at said front surface a composite light beam comprising a first light component diverging from said optical axis produced from light received by said first rear surface combined with a concentrated substantially collimated second light component resulting in a core beam surrounded by a smoothly transitioning lower intensity surround beam.
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Accused Products
Abstract
A nonimaging light assembly for flashlights, including a light source and a lens symmetrical about an optical axis for receiving light from the light source and producing therefrom a light beam having concentrated and divergent components resulting in a high intensity core beam surrounded by a smoothly transitioning lower intensity surround beam. In a preferred embodiment utilizing a light emitting diode as the light source, the combined light beam produced by the light assembly has a substantially circular cross section.
20 Citations
29 Claims
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1. A nonimaging light assembly, comprising:
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a light source; and a lens symmetrical about an optical axis, including a first rear surface intersecting said optical axis for receiving a first portion of light emanating from said light source positioned along said optical axis, a second rear surface extending about said first rear surface for receiving a second portion of light emanating from said light source, a side surface for total-internally reflecting and substantially collimating light received by said second rear surface, and a front surface for exiting light reflected from said side surface and light received by said first rear surface; said lens having an axisymmetric profile substantially described by sample points thereon defined by x,y-coordinate pairs set forth in FIGS. 17 a and 17b, incorporated herein by reference, where x represents position along an x-coordinate along said optical axis and y represents position along a y-coordinate radially from said optical axis, the x and y positions of said sample points subject however to reasonable tolerances, for exiting at said front surface a composite light beam comprising a first light component diverging from said optical axis produced from light received by said first rear surface combined with a concentrated substantially collimated second light component resulting in a core beam surrounded by a smoothly transitioning lower intensity surround beam. - View Dependent Claims (2, 3, 4, 5, 6, 7)
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8. A nonimaging light assembly, comprising:
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a light source; and a lens symmetrical about an optical axis, including a substantially circular first rear surface intersecting said optical axis for receiving a first portion of light emanating from said light source positioned along said optical axis, a second rear surface extending about said first rear surface for receiving a second portion of light emanating from said light source, said second rear surface having an axisymmetric profile substantially described by sample points thereon defined by x,y-coordinate pairs set forth in FIG. 18 , incorporated herein by reference, where x represents position along an x-coordinate along said optical axis and y represents position along a y-coordinate radially from said optical axis, the x and y positions of said sample points subject however to reasonable tolerances,a side surface having an axisymmetric profile for total-internally reflecting and substantially collimating light received by said second rear surface, and a substantially flat front surface for exiting light reflected from said side surface and light received by said first rear surface; the diameter of said first rear surface, said axisymmetric profile of said second rear surface, and said axisymmetric profile of said side surface being related for exiting at said front surface a composite light beam comprising a first light component diverging from said optical axis produced from light received by said first rear surface combined with a concentrated substantially collimated second light component resulting in a core beam surrounded by a smoothly transitioning lower intensity surround beam. - View Dependent Claims (9, 10, 11, 12, 13, 14, 15, 16, 17, 18, 19, 20)
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21. A nonimaging light assembly, comprising:
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a light source; and a lens symmetrical about an optical axis, including a substantially circular first rear surface intersecting said optical axis for receiving a first portion of light emanating from said light source positioned along said optical axis, a second rear surface extending about said first rear surface and having an axisymmetric profile for receiving a second portion of light emanating from said light source, a side surface for total-internally reflecting and substantially collimating light received by said second rear surface, said side surface having an axisymmetric profile substantially described by sample points thereon defined by x,y-coordinate pairs set forth in FIG. 19 , incorporated herein by reference, where x represents position along an x-coordinate along said optical axis and y represents position along a y-coordinate radially from said optical axis, the x and y positions of said sample points subject however to reasonable tolerances,a substantially flat front surface for exiting light reflected from said side surface and light received by said first rear surface; the diameter of said first rear surface, said axisymmetric profile of said second rear surface, and said axisymmetric profile of said side surface being related for exiting at said front surface a composite light beam comprising a first light component diverging from said optical axis produced from light received by said first rear surface combined with a concentrated substantially collimated second light component resulting in a core beam surrounded by a smoothly transitioning lower intensity surround beam. - View Dependent Claims (22, 23, 24, 25, 26, 27, 28, 29)
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Specification
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Current AssigneeSureFire LLC (Surefire Holdings LLC)
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Original AssigneeSureFire LLC (Surefire Holdings LLC)
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InventorsShatz, Narkis E., Bortz, John C.
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Primary Examiner(s)Han, Jason Moon
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Assistant Examiner(s)APENTENG, JESSICA MCMILLAN
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Application NumberUS13/135,508Time in Patent Office1,048 DaysField of Search362/311.02, 362/311.12, 362/296.1, 362/335, 362/317US Class Current362/311.02CPC Class CodesF21L 4/027 the light sources being a LEDF21V 5/006 applied to portable lightin...F21V 5/04 of lens shapeF21V 7/0075 for portable lighting devicesF21V 7/0091 using total internal reflec...F21Y 2115/10 Light-emitting diodes [LED]
