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US5475571A Expired / Lapsed US ⏱️ 0.0 years remaining

Ring Light collector

Assignee: Visteon Global Technologies Inc
•
Filing: 1994-03-30
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Granted: 1995-12-12
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Expires: 2014-03-30
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Abstract

Abstract A ring light collector having a light source with a plurality of light pipes is located in a fixed relation with the light source. Each light pipe has a face which collectively substantially form a ring having a predetermined width between an inner diameter and an outer diameter. A concave reflecting surface having an axis of symmetry is fixed relative to the light source and plurality of light pipes. The concave reflecting surface extends in a rotated ellipsoidal fashion and is defined by the outermost surface of an ellipsoid having a major axis forming a predetermined angle with the axis of symmetry. The major axis of the ellipsoid is rotated about the axis of symmetry. The first focal point of the ellipsoid is located a predetermined distance from said axis of symmetry and a second focal point is located substantially between the outer diameter and inner diameter of the ring. The light source is located substantially at the first focal point. The light reflected from the concave reflecting surface forms a ring on the faces of the light pipes.

Inventors

  • 👤 Mahendra Dassanayake

Bibliographic Details

Application Number —
Jurisdiction US
Data Source google_patents
Last Synchronized 2026-11-03 14:45
CPC Classifications
G; G02; G02B; G02B6/00; G02B6/0001; G02B6/0005; G02B6/0006; F; F21; F21S; F21S41/00; F21S41/20; F21S41/24; G02B6/24; G02B6/42; G02B6/4201; G02B6/4204; G02B6/4206; G02B6/4298; Y; Y10; Y10S; Y10S385/00; Y10S385/901

Claims Analysis

Total Claims: 23
Claim 1
Independent Claim 169 words
Light collector comprising: a light source; a plurality of light pipes located in a fixed relation with said light source, each light pipe having a face, said faces collectively substantially forming a ring having a predetermined width between an inner diameter and an outer diameter; and a concave reflecting surface fixed relative to said light source and said plurality of light pipes and having an axis of symmetry, said concave reflecting surface extending in a rotated ellipsoidal fashion defined by the outermost surface of an ellipsoid having a major axis forming a predetermined angle with said axis of symmetry, a first focal point located a predetermined distance from said axis of symmetry and a second focal point located substantially between the outer diameter and inner diameter of said ring, said major axis of said ellipsoid rotated about said axis of symmetry, said light source located substantially at said first focal point; whereby light reflected from said concave reflecting surface forms a ring on said faces of said light pipes.
Claim 2
Dependent Claim 169 words
Light collector comprising: a light source; a plurality of light pipes located in a fixed relation with said light source, each light pipe having a face, said faces collectively substantially forming a ring having a predetermined width between an inner diameter and an outer diameter; and a concave reflecting surface fixed relative to said light source and said plurality of light pipes and having an axis of symmetry, said concave reflecting surface extending in a rotated ellipsoidal fashion defined by the outermost surface of an ellipsoid having a major axis forming a predetermined angle with said axis of symmetry, a first focal point located a predetermined distance from said axis of symmetry and a second focal point located substantially between the outer diameter and inner diameter of said ring, said major axis of said ellipsoid rotated about said axis of symmetry, said light source located substantially at said first focal point; whereby light reflected from said concave reflecting surface forms a ring on said faces of said light pipes.
Claim 3
Dependent Claim 20 words
A light collector as recited in claim 1 wherein said faces of said light pipe form a substantially planar surface.
Claim 4
Dependent Claim 53 words
A light collector as recited in claim 2 wherein said light source has a base located in a predetermined position to said housing, said base having a longitudinal axis collinear with said longitudinal axis of said light source, said light source positioned on a line normal to the center point of said ring.
Claim 5
Dependent Claim 42 words
A light collector as recited in claim 1 wherein said light pipes are located around said base of said light source, said base having an outer diameter, said ring having an inner diameter which is substantially the outer diameter of said base.
Claim 6
Dependent Claim 25 words
A light collector as recited in claim 1 wherein said predetermined distance between said axis of symmetry and said first focal point is substantially zero.
Claim 7
Dependent Claim 50 words
A light collector as recited in claim 1 wherein said predetermined angle between said axis of symmetry and said major axis of said ellipsoid is constant so that when said ellipsoid is rotated about said axis of symmetry said first focal point circumscribes a circle about said axis of symmetry.
Claim 8
Dependent Claim 47 words
A light collector as recited in claim 1 wherein said predetermined angle between said axis of symmetry and said major axis of said ellipsoid varies so that when said ellipsoid is rotated about said axis, said first focal point circumscribes an ellipse about said axis of symmetry.
Claim 9
Dependent Claim 56 words
A light collector as recited in claim 1 wherein said predetermined distance between said plurality of first focal points and said axis of symmetry is a constant whereby when said first focus is rotated about said axis if symmetry it forms a circle and said light source is located at substantially a point on said circle.
Claim 10
Dependent Claim 22 words
A light collector as recited in claim 1 wherein said light source comprises a filament located perpendicular to said axis of symmetry.
Claim 11
Dependent Claim 29 words
A light collector as recited in claim 9 wherein said filament has a portion of increased intensity, said first focus of said ellipsoid located at portion of increased intensity.
Claim 12
Dependent Claim 32 words
A light collector as recited in claim 1 wherein each face has a predetermined acceptance angle, said concave surface extends to a point where the acceptance angle and said concave surface intersect.
Claim 13
Dependent Claim 38 words
A light collector as recited in claim 1 further comprising a light filter placed on said faces of said light pipe so that light incident on said faces of said light pipe will take on a predetermined color.
Claim 14
Dependent Claim 195 words
Light collector comprising: a light source; a plurality of light pipes located in a fixed relation with said light source, each light pipe having a face, said faces in combination substantially forming a ring having a predetermined width between an inner diameter and an outer diameter; a housing having an interior and exterior portion and having an aperture adapted to receive said light pipes and said light source in a predetermined relation; said interior portion having a concave reflecting surface, said concave reflecting surface fixed relative to said light source and said plurality of said light pipes having an axis of symmetry, said surface defined by the outermost surface of an ellipsoid, having a major axis forming a predetermined angle with said axis of symmetry, a first focal point located a predetermined distance from said axis of symmetry and a second focus point located substantially between the outer diameter and inner diameter of said ring, said major axis of said ellipsoid rotated about said axis of symmetry, said light source located substantially at said first focal point; whereby light reflected from said concave reflecting surface forms a ring on said faces of said light pipes.
Claim 15
Dependent Claim 195 words
Light collector comprising: a light source; a plurality of light pipes located in a fixed relation with said light source, each light pipe having a face, said faces in combination substantially forming a ring having a predetermined width between an inner diameter and an outer diameter; a housing having an interior and exterior portion and having an aperture adapted to receive said light pipes and said light source in a predetermined relation; said interior portion having a concave reflecting surface, said concave reflecting surface fixed relative to said light source and said plurality of said light pipes having an axis of symmetry, said surface defined by the outermost surface of an ellipsoid, having a major axis forming a predetermined angle with said axis of symmetry, a first focal point located a predetermined distance from said axis of symmetry and a second focus point located substantially between the outer diameter and inner diameter of said ring, said major axis of said ellipsoid rotated about said axis of symmetry, said light source located substantially at said first focal point; whereby light reflected from said concave reflecting surface forms a ring on said faces of said light pipes.
Claim 16
Dependent Claim 20 words
A light collector as recited in claim 13 wherein said faces of said light pipe form a substantially planar surface.
Claim 17
Dependent Claim 53 words
A light collector as recited in claim 14 wherein said light source has a base located in a predetermined position to said housing, said base having a longitudinal axis collinear with said longitudinal axis of said light source, said light source positioned on a line normal to the center point of said ring.
Claim 18
Dependent Claim 50 words
A light collector as recited in claim 13 wherein said predetermined angle between said axis of symmetry and said major axis of said ellipsoid is constant so that when said ellipsoid is rotated about said axis of symmetry said first focal point circumscribes a circle about said axis of symmetry.
Claim 19
Dependent Claim 47 words
A light collector as recited in claim 13 wherein said predetermined angle between said axis of symmetry and said major axis of said ellipsoid varies so that when said ellipsoid is rotated about said axis, said first focal point circumscribes an ellipse about said axis of symmetry.
Claim 20
Dependent Claim 238 words
Light collector comprising: a light source having a longitudinal base; a plurality of light pipes located around said base in a predetermined relationship to said light source, each light pipe having a face, said faces in combination substantially forming a planar ring having a predetermined width between an inner diameter and an outer diameter; a first housing member having an interior and exterior portion; a second housing member having an aperture adapted to receive said light pipes and said light source, said second housing adapted to be connected to said first housing; a second housing member adapted to be connected to said first housing, said second housing having exterior and an interior concave reflecting surface, said concave reflecting surface fixed relative to said light source and said plurality of light pipes and having an axis of symmetry, said concave reflecting surface extending in a rotated ellipsoidal fashion defined by the outermost surface of an ellipsoid having a major axis forming a predetermined angle with said axis of symmetry, a first focal point located a predetermined distance from said axis of symmetry and a second focal point located substantially between the outer diameter and inner diameter of said ring, said major axis of said ellipsoid rotated about said axis of symmetry, said light source located substantially at said first focal point; whereby light reflected from said concave reflecting surface forms a ring on said faces of said light pipes.
Claim 21
Dependent Claim 238 words
Light collector comprising: a light source having a longitudinal base; a plurality of light pipes located around said base in a predetermined relationship to said light source, each light pipe having a face, said faces in combination substantially forming a planar ring having a predetermined width between an inner diameter and an outer diameter; a first housing member having an interior and exterior portion; a second housing member having an aperture adapted to receive said light pipes and said light source, said second housing adapted to be connected to said first housing; a second housing member adapted to be connected to said first housing, said second housing having exterior and an interior concave reflecting surface, said concave reflecting surface fixed relative to said light source and said plurality of light pipes and having an axis of symmetry, said concave reflecting surface extending in a rotated ellipsoidal fashion defined by the outermost surface of an ellipsoid having a major axis forming a predetermined angle with said axis of symmetry, a first focal point located a predetermined distance from said axis of symmetry and a second focal point located substantially between the outer diameter and inner diameter of said ring, said major axis of said ellipsoid rotated about said axis of symmetry, said light source located substantially at said first focal point; whereby light reflected from said concave reflecting surface forms a ring on said faces of said light pipes.
Claim 22
Dependent Claim 50 words
A light collector as recited in claim 18 wherein said predetermined angle between said axis of symmetry and said major axis of said ellipsoid is constant so that when said ellipsoid is rotated about said axis of symmetry said first focal point circumscribes a circle about said axis of symmetry.
Claim 23
Dependent Claim 47 words
A light collector as recited in claim 18 wherein said predetermined angle between said axis of symmetry and said major axis of said ellipsoid varies so that when said ellipsoid is rotated about said axis, said first focal point circumscribes an ellipse about said axis of symmetry.

References Cited (Backward Citations)

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USPTO Annuity & Maintenance Windows

Annuity Stage Window Opens Payment Deadline Surcharge Period Until Estimated Fee Status
3.5 Years (Year 4) 1998-12-11 1999-06-12 1999-12-12 $2000.00 Window Closed / Lapsed
7.5 Years (Year 8) 2002-12-11 2003-06-12 2003-12-12 $3760.00 Window Closed / Lapsed
11.5 Years (Year 12) 2006-12-11 2007-06-12 2007-12-12 $7700.00 Window Closed / Lapsed

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