Draft International Standard
ISO/DIS 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
Reference number
ISO/DIS 20351
Edition 2
International Standard
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ISO/DIS 20351
This Draft International Standard is in the enquiry phase with ISO members.
Will replace ISO 20351:2017

ISO/DIS 20351

ISO/DIS 20351
CHF 63
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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.

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