Spherically emitting remote phosphor
First Claim
1. A light source comprising:
- an emitter of photostimulative light;
a reflector disposed about said emitter so as to reflect light from said emitter towards an outlet end;
a tailored aspheric lens that further collimates the light from said reflector;
a short-pass filter receiving said collimated light and transmitting light from said emitter;
a dielectric concentrator on the other side of said filter, said concentrator receiving said transmitted light and concentrating said light on an exit aperture;
a dielectric emitting optic on the outside of said exit aperture so as to receive said concentrated light; and
a layer of photosensitive phosphor deposited on the outside of said dielectric emission optic, said photosensitive phosphor responsive to said photostimulative light to emit light of a longer wavelength.
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Accused Products
Abstract
Light sources comprise an emitter of photostimulative light, such as one or more blue LEDs, a reflector, which may be a diverging cone, disposed to reflect light from the LEDs towards an exit aperture, a tailored aspheric lens that further collimates the light from the reflector, a short-pass filter receiving and transmitting the collimated light, a dielectric concentrator receiving the light transmitted by the filter from the LEDs and concentrating it upon the exit aperture, a dielectric emission optic on the outside of the exit aperture to receive the concentrated light, and a layer of photosensitive phosphor deposited on the outside of the emission optic, the phosphor responsive to the LED light to emit light of a longer wavelength.
114 Citations
15 Claims
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1. A light source comprising:
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an emitter of photostimulative light; a reflector disposed about said emitter so as to reflect light from said emitter towards an outlet end; a tailored aspheric lens that further collimates the light from said reflector; a short-pass filter receiving said collimated light and transmitting light from said emitter; a dielectric concentrator on the other side of said filter, said concentrator receiving said transmitted light and concentrating said light on an exit aperture; a dielectric emitting optic on the outside of said exit aperture so as to receive said concentrated light; and a layer of photosensitive phosphor deposited on the outside of said dielectric emission optic, said photosensitive phosphor responsive to said photostimulative light to emit light of a longer wavelength. - View Dependent Claims (2, 3, 4, 5, 6, 7)
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8. A light source comprising:
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an emitter of photostimulative light; an optical stage arranged to collect light from the emitter and forward collected light to an exit aperture; a dielectric emitting optic on the outside of said exit aperture so as to receive said forwarded light; and a layer of photosensitive phosphor deposited on the outside of said dielectric emission optic, said photosensitive phosphor responsive to said photostimulative light to emit light of a longer wavelength. - View Dependent Claims (9, 10, 11, 12, 13, 14, 15)
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Specification