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
Označení normy: ISO 20351:2024-ed.2.0
Datum vydání normy: 16.10.2024
Počet stran: 14
Přibližná hmotnost: 42 g (0.09 liber)
Země: Mezinárodní technická norma
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.