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US 2020/0220053 A1Published application
Infrared emitting device
AssigneeLumileds LLC
InventorsPeter Josef SCHMIDT, Detlef WIECHERT
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Abstract
Embodiments of the invention include a light source and a wavelength converting structure disposed in a path of light emitted by the light source. The wavelength converting structure includes a first phosphor that emits infrared light and a second phosphor that emits visible light. In some embodiments, the light source emits first light, the second phosphor absorbs the first light and emits second light, and the first phosphor absorbs the first light and emits third light and absorbs the second light and emits fourth light.
Claims8
A device comprising:
- a light source emitting first light;
- and
- a wavelength converting structure disposed in a path of light emitted by the light source, the wavelength converting structure comprising:
- a first phosphor that emits infrared light;
- and
- a second phosphor that absorbs the first light and emits second light, which second light is visible light,
- wherein the first phosphor absorbs the first light and emits third light,
- wherein the first phosphor absorbs the second light and emits fourth light, and
- wherein the third light and the fourth light have different peak wavelengths in the infrared emission range.
6 more elements
Dependencies are inferred from the claim text.