Illumination systems utilizing wavelength conversion materials
First Claim
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1. An illumination system, comprising:
- a tapered hollow light guide having an interior cavity, a light entrance aperture and a light exit aperture, the light entrance aperture having less area that the light exit aperture;
wavelength conversion material located within the interior cavity of the hollow light guide; and
a reflective layer formed along the walls of the interior cavity.
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Abstract
A wavelength conversion material with an omni-directional reflector is utilized to enhance the optical efficiency of an illumination system. Light guides with restricted output apertures, micro-element plates and optical elements are utilized to enhance the brightness of delivered light through light recycling. In addition, micro-element plates may be used to provide control over the spatial distribution of light in terms of intensity and angle. Efficient and compact illumination systems are also disclosed.
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Citations
20 Claims
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1. An illumination system, comprising:
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a tapered hollow light guide having an interior cavity, a light entrance aperture and a light exit aperture, the light entrance aperture having less area that the light exit aperture; wavelength conversion material located within the interior cavity of the hollow light guide; and a reflective layer formed along the walls of the interior cavity. - View Dependent Claims (2, 3, 4, 5, 6, 7, 17, 18, 19, 20)
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8. A system, comprising:
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a tapered hollow light guide having an interior cavity, a light entrance aperture and a light exit aperture, the light entrance aperture having less area that the light exit aperture; wavelength conversion material located within the interior cavity of the hollow light guide; a reflective layer formed along the walls of the interior cavity; and a low-refractive index layer between the wavelength conversion material and the reflective layer. - View Dependent Claims (9, 10, 11, 12, 13, 14, 15, 16)
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Specification