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US 11,860,521 B2Granted
Light source with photoluminescence emitter
AssigneeSchott AG
InventorsVolker Hagemann, Albrecht Seidl
Life of this patent
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Abstract
A light source is provided that includes a laser operable to emit laser light at a wavelength in a range from 460 nanometers to 470 nanometers and a converter assembly arranged so as to absorb the laser light emitted by the laser and to emit photoluminescent light produced by the laser light and having a longer wavelength than the laser light. The converter assembly has a converter element with a ceramic doped with Eu3+ such that under irradiation of the laser light the converter assembly emits photoluminescent light in the red spectral range.
Claims19
A light source, comprising:
- a laser operable to emit laser light at a wavelength in a range from 460 nanometers to 470 nanometers;
- a laser light wavelength stabilizer that comprises an active loop control with a loop control circuit that stabilizes the laser at an absorption wavelength of Eu3+ ions;
- and
- a converter assembly arranged to convert the laser light to photoluminescent light having a longer wavelength than the laser light,
- wherein the converter assembly comprises a converter element doped with Eu3+ such that under irradiation of the laser light the converter assembly emits photoluminescent light in a red spectral range.
2 more elements
Dependencies are inferred from the claim text.