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ISO 17328:2021

Optics and photonics — Optical materials and components — Test method for refractive index of infrared optical materials

Publication date:   Nov 30, 2021

General information

90.60   Close of review   Jun 5, 2026

ISO

ISO/TC 172/SC 3 Optical materials and components

International Standard

37.020   Optical equipment

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Scope

This document provides a standard method for measuring the relative refractive index to the air of infrared materials used in the infrared spectral range from 0,78 µm to 25 µm.
This document excludes methods for measuring the refractive index of birefringent materials and methods for measuring the complex refractive index.

Life cycle

PREVIOUSLY

WITHDRAWN
ISO 17328:2014

NOW

PUBLISHED
ISO 17328:2021
90.60 Close of review
Jun 5, 2026