ISO 6760-2:2024

International
Standard
ISO 6760-2
First edition
Optics and photonics — Test
method for temperature coefficient
of refractive index of optical
glasses —
Part 2:
Interferometric method
Optique et photonique — Méthode d'essai pour déterminer le
coefficient de température de l'indice de réfraction des verres
optiques —
Partie 2: méthode interférométrique
PROOF/ÉPREUVE
Reference number
ISO 6760-2:2024(en) © ISO 2024

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ISO 6760-2:2024(en)
COPYRIGHT PROTECTED DOCUMENT
© ISO 2024
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
PROOF/ÉPREUVE
© ISO 2024 – All rights reserved
ii

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ISO 6760-2:2024(en)
Contents Page
Foreword .iv
Introduction .v
1 Scope . 1
2 Normative references . 1
3 Terms and definitions . 1
4 Principle . 2
5 Measuring apparatus . 2
5.1 General .2
5.2 Light sources .3
5.3 Thermal chamber .4
5.4 Flat plates .4
5.5 Interferometer for optical path length change measurement .5
5.6 Interferometer for expansion measurement .5
5.7 Detectors.5
5.8 Temperature sensor .6
5.9 Barometer .6
6 Measurement specimen .
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ISO/PRF 6760-2:2024(en)
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ISO /TC 172/SC 3/WG 1
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Secretariat: JISC
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Date: 2024-02-16xx
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Optics and photonics — Test method for temperature coefficient of
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refractive index of optical glasses — —
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Part 2: Style Definition
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Interferometric method
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Optique et photonique — Méthode d'essai pour déterminer le coefficient de température de l'indice de
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réfraction des verres optiques — Partie 2: méthode interférométrique —
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Partie 2: méthode interférométrique
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St l D fi iti

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ISO/PRF 6760-2:2024(en)
Formatted: Font: Bold
Formatted: HeaderCentered
Formatted: French (France)
© ISO 2024
Formatted: Right: 1.5 cm, Bottom: 1 cm, Gutter: 0 cm,
All rights reserved. Unless otherwise specified, or required in the context of its implementation, no part of this publication
Header distance from edge: 1.27 cm, Footer distance
may be reproduced or utilized otherwise in any form or by any means, electronic or mechanical, including photocopying,
from edge: 0.5 cm
or posting on the internet or an intranet, without prior written permission. Permission can be requested from either
Commented [eXtyles1]: The reference "ISO 2024" is to a
ISO at the address below or ISO’s member body in the country of the requester.
withdrawn standard
ISO copyright office Formatted: Default Paragraph Font, French (France)
CP 401 • Ch. de Blandonnet 8
Formatted: Default Paragraph Font, French (France)
CH-1214 Vernier, Geneva
Formatted: French (France)
Phone: + 41 22 749 01 11
EmailE-mail: copyright@iso.org
Formatted: French (France)
Website: www.iso.orgwww.iso.org
Formatted: French (France)
Published in Switzerland
Formatted: French (France)
Formatted: FooterPageRomanNumber
© ISO 2024 – All rights reserved

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ISO/PRF 6760-2:2024(en)
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Contents
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Foreword . Error! Bookmark not defined.
Introduction . Error! Bookmark not defined.
1 Scope . Error! Bookmark not defined.
2 Normative references . Error! Bookmark not defined.
3 Terms and definitions . Error! Bookmark not defined.
4 Principle. Error! Bookmark not defined.
5 Measuring apparatus . Error! Bookmark not defined.
5.1 General . Error! Bookmark not defined.
5.2 Light sources . Error! Bookmark not defined.
5.3 Thermal chamber . Error! Bookmark not defined.
5.4 Flat plates . Error! Bookmark not defined.
5.5 Interferometer for optical path length change measurement . Error! Bookmark not defined.
5.6 Interferometer for expansion measurement . Error! Bookmark not defined.
5.7 Detectors .
...