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
All rights reserved. Unless otherwise specified, or required in the context of its implementation, no part of this publication may
be reproduced or utilized otherwise in any form or by any means, electronic or mechanical, including photocopying, or posting on
the internet or an intranet, without prior written permission. Permission can be requested from either ISO at the address below
or ISO’s member body in the country of the requester.
ISO copyright office
CP 401 • Ch. de Blandonnet 8
CH-1214 Vernier, Geneva
Phone: +41 22 749 01 11
Email: copyright@iso.org
Website: www.iso.org
Published in Switzerland
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
committee has been established has the right to be represented on that committee. International
organizations, governmental and non-governmental, in liaison with ISO, also take part in the work.
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
editorial rules of the ISO/IEC Directives, Part 2 (see www.iso.org/directives).
Attention is drawn to the possibility that some of the elements of this document may be the subject of
patent rights. ISO shall not be held responsible for identifying any or all such patent rights. Details of
any patent rights identified during the development of the document will be in the Introduction and/or
on the ISO list of patent declarations received (see www.iso.org/patents).
Any trade name used in this document is information given for the convenience of users and does not
constitute an endorsement.
For an explanation of the voluntary nature of standards, the meaning of ISO specific terms and
expressions related to conformity assessment, as well as information about ISO's adherence to
the World Trade Organization (WTO) principles in the Technical Barriers to Trade (TBT), see
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).
2 Normative references
The following documents are referred to in the text in such a way that some or all of their content
constitutes requirements of this document. For dated references, only the edition cited applies. For
undated references, the latest edition of the referenced document (including any amendments) applies.
ISO 10110-18, Optics and photonics — Preparation of drawings for optical elements and systems — Part
18: Stress birefringence, bubbles and inclusions, homogeneity, and striae
ISO 12123:2018, Optics and photonics — Specification of raw optical glass
ISO 15368, Optics and photonics — Measurement of reflectance of plane surfaces and transmittance of
plane parallel elements
ISO 80000-7, Quantities and units — Part 7: Light and radiation
3 Terms and definitions
For the purposes of this document, the terms and definitions given in ISO 12123, ISO 80000-7 and the
1)
following apply .
ISO and IEC maintain terminology databases for use in standardization at the following addresses:
— ISO Online browsing platform: available at https:// www .iso .org/ obp
— IEC Electropedia: available at https:// www .electropedia .org/
3.1
regular transmittance
ratio of the regularly transmitted part of the (whole) transmitted flux to the incident flux
1)  These terms and definitions are consistent with those given in IEC
...