LED-based dental exam lamp with variable chromaticity
First Claim
1. A dental operatory lamp used to illuminate an operating area comprising:
- a thermally conductive housing having a front directed toward the operating area and a rear away from the operating area;
a generally elliptical reflector located on the rear of the thermally conductive housing, wherein the generally elliptical reflector is shaped to direct the light from the LEDs toward the front of the lamp in a pattern that focuses light from the lamp to a central area of illumination of high intensity, with significantly reduced intensity illumination outside the central area;
a plurality of color LEDs projecting light toward the elliptical reflector and toward the back of the thermally conductive housing; and
an optical light guide for combining light from said LEDs.
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Accused Products
Abstract
An electrically powered light source including a light emitting diode (LED) having variable chromaticity, which is adapted for use in a dental operatory. A dental operatory lamp includes a thermally conductive housing having a front directed toward the operating area and a rear away from the operating area; a generally elliptical reflector located on the rear of the thermally conductive housing; at least one heat pipe; a plurality of color LEDs projecting light toward the elliptical reflector, the plurality of LEDs being in thermal contact with the at least one heat pipe; and an optical light guide for combining light from said LEDs. Another embodiment of the lamp includes at least two user selectable light spectra, one of said spectra providing white light with color temperature in the range 4000° K-6000° K and one spectra having reduced output in the wavelength range 400-500 nm.
179 Citations
20 Claims
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1. A dental operatory lamp used to illuminate an operating area comprising:
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a thermally conductive housing having a front directed toward the operating area and a rear away from the operating area; a generally elliptical reflector located on the rear of the thermally conductive housing, wherein the generally elliptical reflector is shaped to direct the light from the LEDs toward the front of the lamp in a pattern that focuses light from the lamp to a central area of illumination of high intensity, with significantly reduced intensity illumination outside the central area; a plurality of color LEDs projecting light toward the elliptical reflector and toward the back of the thermally conductive housing; and an optical light guide for combining light from said LEDs. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 10, 11, 12, 13, 14, 15, 16, 17)
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9. A dental operatory lamp used to illuminate an operating area comprising:
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a thermally conductive housing having a front directed toward the operating area and a rear away from the operating area; a generally elliptical reflector located on the rear of the thermally conductive housing; at least one heat pipe; a plurality of color LEDs being in thermal contact with the at least one heat pipe; and an optical light guide for combining light from said LEDs, wherein the optical light guide directs the light from the LEDs toward the front of the lamp in a pattern that focuses light from the lamp to a central area of illumination of high intensity, with significantly reduced intensity illumination outside the central area. - View Dependent Claims (18, 19, 20)
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Specification