ISO/DIS 20351
ISO/DIS 20351

Status : Under development


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.

General information

  •  : Under development
    : DIS registered [40.00]
  •  : 2
     : 14
  • ISO/TC 206
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