Aperture lamp

Patent · Tue Dec 31 23:00:00 EST 2002

OSTI ID:875000

MacLennan, Donald A ^[1]; Turner, Brian P ^[2]

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1. Gaithersburg, MD
2. Damascus, MD

A discharge lamp includes means for containing a light emitting fill, the fill being capable of absorbing light at one wavelength and re-emitting the light at a different wavelength, the light emitted from the fill having a first spectral power distribution in the absence of reflection of light back into the fill; means for exciting the fill to cause the fill to emit light; and means for reflecting some of the light emitted by the fill back into the fill while allowing some light to exit, the exiting light having a second spectral power distribution with proportionately more light in the visible region as compared to the first spectral power distribution, wherein the light re-emitted by the fill is shifted in wavelength with respect to the absorbed light and the magnitude of the shift is in relation to an effective optical path length. Another discharge lamp includes an envelope; a fill which emits light when excited disposed in the envelope; a source of excitation power coupled to the fill to excite the fill and cause the fill to emit light; and a reflective ceramic structure disposed around the envelope and defining an light emitting opening, wherein the structure comprises a sintered body built up directly on the envelope and made from a combination of alumina and silica.

• Research Organization: Fusion Lighting, Inc., Rockville, MD (United States)
• DOE Contract Number: FG01-95EE23796
• Assignee: Fusion Lighting, Inc. (Rockville, MD)
• Patent Number(s): US 6509675
• OSTI ID: 875000
• Country of Publication: United States
• Language: English

Related Subjects

/313/315/
absence
absorbed
absorbing
absorbing light
allowing
alumina
aperture
built
capable
ceramic
combination
compared
containing
coupled
defining
directly
discharge
disposed
distribution
effective
emit
emits
emitted
emitting
envelope
excitation
excite
excited
exciting
exit
exiting
fill
lamp
length
light
magnitude
means
optical
optical path
path
power
proportionately
re-emitted
re-emitting
reflecting
reflection
reflective
region
relation
shift
shifted
silica
sintered
source
spectral
structure
structure disposed
visible
wavelength