ISO 20351:2024-ed.2.0

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Bezeichnung: ISO 20351:2024-ed.2.0

Ausgabedatum: 16.10.2024

Seiten: 14

Land: Internationale technische Norm

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Description / Abstract: This document specifies test methods for the use of an integrating sphere to measure the optical properties of ceramic phosphor powders, which are used in white light-emitting diodes (LEDs) and emit visible light when excited by UV or blue light. This document specifies an absolute method to measure internal quantum efficiency and a substitution method to measure external quantum efficiency and absorptance. The substitution method uses reference materials whose external quantum efficiency and absorptance have been obtained in accordance with ISO 23946.