Fine ceramics (advanced ceramics, advanced technical ceramics) — Test method for optical properties of ceramic phosphors for white light-emitting diodes using an integrating sphere
NORMA vydána dne 16.10.2024
Designation standards: ISO 20351:2024-ed.2.0
Publication date standards: 16.10.2024
The number of pages: 14
Approximate weight : 42 g (0.09 lbs)
Country: International technical standard
Kategorie: Technické normy ISO
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.