ISO 11382:2022

INTERNATIONAL ISO
STANDARD 11382
Second edition
2022-11
Optics and photonics — Optical
materials and components —
Characterization of optical materials
used in the infrared spectral range
from 0,78 µm to 25 µm
Optique et photonique — Matériaux et composants optiques —
Caractérisation des matériaux optiques utilisés dans la bande
spectrale infrarouge de 0,78 µm à 25 µm
Reference number
© ISO 2022
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ii
Contents Page
Foreword .iv
Introduction .v
1 Scope . 1
2 Normative references . 1
3 Terms and definitions . 1
4 Symbols and units. 2
5 Nomenclature . 2
5.1 General . 2
5.2 Name . 2
5.3 Manufacturer reference . 3
5.4 Material structure . 3
5.5 Manufacturing process . 3
5.6 Form of nomenclature . 3
6 Optical properties . 3
6.1 General . 3
6.2 Transmittance . 5
6.2.1 Specification to be provided . 5
6.2.2 Temperature dependence . 6
6.3 Absorption coefficient . 6
6.3.1 General . 6
6.3.2 Specification to be provided (to be consistent with 6.5.2) . 6
6.4 Transmittance uniformity . 7
6.4.1 General . 7
6.4.2 Bubbles and inclusions . 7
6.4.3 Local variation of the manufacturing process . 7
6.5 Refractive index . 7
6.5.1 General . 7
6.5.2 Specification reports to be provided . 7
6.6 Refractive index variation . 8
6.7 Dependence of the refractive index on temperature . 8
6.8 Optical homogeneity (homogeneity of refractive index) . 8
6.9 Birefringence . 9
6.9.1 Materials with natural birefringence . 9
6.9.2 Stress birefringence . 9
6.10 Photoelastic constant . 9
6.11 Dispersion . 9
7 Other properties .10
7.1 General . 10
7.2 Specific gravity . 10
7.3 Molecular weight . 10
7.4 Thermal properties . 10
7.4.1 Thermal conductivity . 10
7.4.2 Thermal expansion . 10
7.4.3 Specific heat . 10
7.4.4 Melting temperature and softening temperature . 10
7.5 Hardness . 10
7.6 Elastic modulus . 10
7.7 Maximum dimensions . 10
Bibliography .12
iii
Foreword
ISO (the International Organization for Standardization) is a worldwide federation of national standards
bodies (ISO member bodies). The work of preparing International Standards is normally carried out
through ISO technical committees. Each member body interested in a subject for which a technical
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ISO collaborates closely with the International Electrotechnical Commission (IEC) on all matters of
electrotechnical standardization.
The procedures used to develop this document and those intended for its further maintenance are
described in the ISO/IEC Directives, Part 1. In particular, the different approval criteria needed for the
different types of ISO documents should be noted. This document was drafted in accordance with the
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www.iso.org/iso/foreword.html.
This document was prepared by Technical Committee ISO/TC 172, Optics and photonics, Subcommittee
SC 3, Optical materials and components.
This second edition cancels and replaces the first edition (ISO 11382:2010), which has been technically
revised.
The main changes are as follows:
— update of Clause 2 and Bibliography;
— update of Table 1 and Table 2.
Any feedback or questions on this document should be directed to the user’s national standards body. A
complete listing of these bodies can be found at www.iso.org/members.html.
iv
Introduction
Many standards for optical glass exist that are primarily used for the visible range, however, it is not
easy to apply these standards directly to infrared materials.
Often, the properties of infrared materials are known with less certainty than those used in the visible
range because the methods of measurements are different, incomplete or inaccurate.
v
INTERNATIONAL STANDARD ISO 11382:2022(E)
Optics and photonics — Optical materials and components
— Characterization of optical materials used in the
infrared spectral range from 0,78 µm to 25 µm
1 Scope
This document provides guidelines for the description of data sheets for infrared materials. It specifies
the nomenclature and the properties of infrared materials which are reported on such data sheets.
These data sheets do not necessarily contain information on every property identified in this document.
This document also specifies the parameters needed to characterize optical materials intended for use
in the infrared spectral range from 0,78 µm to 25 µm and provides various methods to be used for
measuring these parameters.
This document is applicable only to materials used in the manufacture of passive optical components.
The properties of materials used in active applications (e.g. optoelectronics) are not taken into account.
Materials specified in this document can also transmit in other spectral domains (microwaves, visible
or ultraviolet).
...