Flush luminaire with optical element for angular intensity redistribution
First Claim
1. A omnidirectional flush luminaire configured to provide a predetermined distribution of light about a horizontal surface comprising:
- a housing having an internal cavity disposed beneath the horizontal surface, wherein the housing defines an opening disposed adjacent the horizontal surface;
a substantially flat transparent optical window having a surface, wherein the optical window surface overlays the housing opening and is substantially flush with the horizontal surface;
a light source disposed within the housing cavity, wherein the light source provides a spatial light distribution pattern which defines an optical axis that is disposed substantially perpendicular relative to the optical window surface; and
a circular prismatic light transformer disposed within the housing cavity, wherein the circular prismatic light transformer redistributes angular intensity emitted by the light source along preselected angles relative to the horizontal surface, thereby providing a predetermined omnidirectional angular intensity redistribution.
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Accused Products
Abstract
A luminaire flush with a horizontal surface and comprising a housing, an optical window, a light source, and an optical element. The housing has an internal cavity disposed beneath the horizontal surface and defines an opening disposed adjacent the horizontal surface. The optical window, substantially flat and transparent, has a surface that overlays the housing opening. The light source, disposed within the housing cavity, provides a spatial light distribution pattern which defines an optical axis that is disposed substantially perpendicular relative to the optical window surface. The optical element, also disposed within the housing cavity, redistributes light rays emitted by the light source along preselected angles relative to the horizontal surface.
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Citations
23 Claims
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1. A omnidirectional flush luminaire configured to provide a predetermined distribution of light about a horizontal surface comprising:
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a housing having an internal cavity disposed beneath the horizontal surface, wherein the housing defines an opening disposed adjacent the horizontal surface;
a substantially flat transparent optical window having a surface, wherein the optical window surface overlays the housing opening and is substantially flush with the horizontal surface;
a light source disposed within the housing cavity, wherein the light source provides a spatial light distribution pattern which defines an optical axis that is disposed substantially perpendicular relative to the optical window surface; and
a circular prismatic light transformer disposed within the housing cavity, wherein the circular prismatic light transformer redistributes angular intensity emitted by the light source along preselected angles relative to the horizontal surface, thereby providing a predetermined omnidirectional angular intensity redistribution. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12, 13, 14)
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15. A flush luminaire configured to provide a predetermined omnidirectional distribution of light about a horizontal surface comprising:
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a housing having an internal cavity disposed beneath the horizontal surface, wherein the housing defines an opening disposed adjacent the horizontal surface;
a substantially flat transparent optical window having a surface, wherein the optical window surface overlays the housing opening and is substantially flush with the horizontal surface;
a heat-generating light source disposed within the housing cavity, wherein the light source provides a spatial light distribution pattern which defines an optical axis that is disposed substantially perpendicular relative to the optical window surface;
an effective amount of a heat-transfer surface, disposed adjacent the light source in a heat-transfer relationship, to provide for removal of heat that is generated by the light source;
a temperature-control device disposed within the housing cavity adjacent the light source and in association with the heat-transfer surface for achieving a substantially uniform temperature profile for the light source; and
a circular prismatic light transformer disposed within the housing cavity, wherein the circular prismatic light transformer redistributes angular intensity emitted by the light source along preselected angles relative to the horizontal surface, thereby providing a predetermined omnidirectional angular intensity redistribution.
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- 16. An optical element characterized as a circular prismatic light transformer, comprising a plurality of concentric prismatic facets radially disposed about a central optical axis, wherein each of the plural prismatic facets has an individual inclination angle relative to a reference plane disposed perpendicular to the central optical axis, wherein said individual inclination angle for each of the plural prismatic facets is calculated as a function of both an actual intensity of an incident cone of light from a light source and a desired intensity of a radiant cone of light in a preselected direction, and wherein light from said light source passes through said circular prismatic light transformer, whereupon said light from said light source is redirected and redistributed, thereby producing a preselected light intensity output envelope.
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23. A directional flush luminaire configured to provide a predetermined distribution of light about a horizontal surface comprising:
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a housing having an internal cavity disposed beneath the horizontal surface, wherein the housing defines an opening disposed adjacent the horizontal surface;
a substantially flat transparent optical window having a surface, wherein the optical window surface overlays the housing opening and is substantially flush with the horizontal surface;
a light source disposed within the housing cavity, wherein the light source provides a spatial light distribution pattern which defines an optical axis that is disposed substantially perpendicular relative to the optical window surface; and
a circular prismatic light transformer disposed within the housing cavity, wherein the circular prismatic light transformer redistributes angular intensity emitted by the light source along preselected angles relative to the horizontal surface, thereby providing a predetermined directional angular intensity redistribution.
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Specification