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ISO/PRF 20351

Fine ceramics (advanced ceramics, advanced technical ceramics) — Test method for optical properties of ceramic phosphors for white light-emitting diodes using an integrating sphere

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50.20     Aug 20, 2024

ISO

ISO/TC 206

International Standard

81.060.30  

English  

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Scope

This document describes test methods using 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. It 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.

Life cycle

PREVIOUSLY

Revises
ISO 20351:2017

NOW

IN_DEVELOPMENT
ISO/PRF 20351
50.20 Proof sent to secretariat or FDIS ballot initiated: 8 weeks
Aug 20, 2024

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