High-pass filter for led lighting
AssigneeCoreLED Systems, LLC
InventorsDerek Mallory, John Kahl
Life of this patent
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Abstract
An optical member that is shaped to collect light from a source, such as an LED, and refract the light to form a desired beam pattern is made of an optically transmissive or transparent polymeric material in which is dispersed an energy converting phosphor that absorbs blue light and emits visible light at a wavelength that is longer than the absorbed blue light.
Claims19
An optical member shaped to collect light from a source and refract the light to form a desired beam pattern, comprising:
- an optically transmissive polymeric material;
- and
- an energy converting phosphor dispersed in the optically transmissive polymeric material, the energy converting phosphor being characterized by an ability to absorb blue light and emit visible light at a wavelength that is longer than that of the blue light.
A moldable composition comprising:
- an optically transmissive polymeric material;
- and
- an energy converting phosphor dispersed in the optically transmissive polymeric material, the energy converting phosphor being characterized by an ability to absorb blue light and emit visible light at a wavelength that is longer than that of the blue light.
An optical lens shaped to collect light from a source and refract the light to form a desired beam pattern, comprising:
- an optically transmissive polymeric material;
- and
- a light-filtering compound that preferentially absorbs visible light at wavelengths less than 500 nm and which is present in an amount effective to selectively absorb most visible light at wavelengths below 500 nm and transmit most visible light at wavelengths above 500 nm.
Dependencies are inferred from the claim text.