EN ISO 9342-1:2023

Optics and optical instruments - Test lenses for calibration of focimeters - Part 1: Reference lenses for focimeters used for measuring spectacle lenses (ISO 9342-1:2023)

This document specifies requirements for reference lenses for the calibration and verification of focimeters that are used for the measurement of spectacle form lenses, e.g. those complying with ISO 8598-1. It also gives a method for the determination of the back vertex power of the reference lenses.
NOTE            It is accepted that other reference lenses can also be used with powers within the given range, manufactured to the same standard of accuracy and form, but different back vertex powers. However, only lenses with integer nominal powers, as described in 4.1, can be used for the calibration of digitally-rounding focimeters.

Optik und optische Instrumente - Prüfgläser zur Kalibrierung von Scheitelbrechwert-Messgeräten - Teil 1: Referenzgläser für Scheitelbrechwert-Messgeräte für die Messung von Brillengläsern (ISO 9342‑1:2023)

Dieses Dokument legt Anforderungen an Referenzgläser zur Kalibrierung und Überprüfung von Scheitelbrechwert-Messgeräten fest, die für die Messung von Brillengläsern verwendet werden, z. B. solche, die der ISO 8598 1 entsprechen. Es enthält auch ein Verfahren zur Bestimmung des bildseitigen Scheitelbrechwerts der Referenzgläser.
ANMERKUNG   Die Verwendung anderer Referenzgläser, deren Brechwert im angegebenen Bereich liegt und die bezüglich Genauigkeit und Form gleichwertig gefertigt wurden, jedoch andere bildseitige Scheitelbrechwerte aufweisen, ist ebenfalls zulässig. Für die Kalibrierung von digital rundenden Scheitelbrechwert-Messgeräten können jedoch nur Gläser mit einem ganzzahligen Sollscheitelbrechwert, wie in 4.1 beschrieben, verwendet werden.

Optique et instruments d'optique - Verres étalons pour l'étalonnage des frontofocomètres - Partie 1: Verres de référence pour frontofocomètres pour le mesurage des verres de lunettes (ISO 9342-1:2023)

Le présent document spécifie les exigences applicables aux verres de référence pour l'étalonnage et la vérification des frontofocomètres utilisés pour le mesurage des verres de lunettes, par exemple ceux qui sont conformes à l'ISO 8598-1. Il donne en outre une méthode qui permet de déterminer la puissance frontale arrière des verres de référence.
NOTE            Il est admis que d'autres verres de référence ayant des puissances situées dans la plage donnée, fabriqués selon les mêmes normes d'exactitude et de courbure, mais ayant des puissances frontales arrière différentes, puissent être utilisés. Cependant, pour l'étalonnage des frontofocomètres à affichage numérique avec arrondi, on ne peut utiliser que des verres ayant des puissances nominales entières, comme décrit en 4.1.

Optika in optični instrumenti - Preskusne leče za umerjanje fokometrov – 1. del: Referenčne leče za fokometre, ki se uporabljajo za merjenje spektralnih leč (ISO 9342-1:2023)

Ta dokument določa zahteve za referenčne leče za umerjanje in preverjanje fokometrov, ki se uporabljajo za merjenje spektralnih leč, npr. tistih, ki so skladne s standardom ISO 8598-1. Prav tako podaja metodo za določanje moči referenčnih leč glede na vrh na zadnji strani.
OPOMBA: Sprejemljivo je, da se lahko uporabljajo tudi druge referenčne leče z močmi znotraj danega območja, ki so izdelane po enakem standardu natančnosti in oblike, vendar z različnimi močmi glede na vrh na zadnji strani. Vendar pa se lahko za umerjanje fokometrov z digitalnim zaokroževanjem uporabljajo le leče s celimi nazivnimi močmi, kot je opisano v točki 4.1.

General Information

• Status: Published
• Publication Date: 18-Jul-2023
• ICS: 11.040.70 - Ophthalmic equipment
• Technical Committee: CEN/TC 170 - Ophthalmic optics
• Drafting Committee: CEN/TC 170 - Ophthalmic optics
• Current Stage: 6060 - Definitive text made available (DAV) - Publishing
• Start Date: 19-Jul-2023
• Completion Date: 19-Jul-2023
• Ref Project: SIST EN ISO 9342-1:2023 - Optics and optical instruments - Test lenses for calibration of focimeters - Part 1: Reference lenses for focimeters used for measuring spectacle lenses (ISO 9342-1:2023)

Relations

• Replaces: EN ISO 9342-1:2005 - Optics and optical instruments - Test lenses for calibration of focimeters - Part 1: Test lenses for focimeters used for measuring spectacle lenses (ISO 9342-1:2005)
• Effective Date: 04-Dec-2019

Standards Content (Sample)

SLOVENSKI STANDARD
01-oktober-2023
Nadomešča:
SIST EN ISO 9342-1:2005
Optika in optični instrumenti - Preskusne leče za umerjanje fokometrov – 1. del:
Referenčne leče za fokometre, ki se uporabljajo za merjenje spektralnih leč (ISO
9342-1:2023)
Optics and optical instruments - Test lenses for calibration of focimeters - Part 1:
Reference lenses for focimeters used for measuring spectacle lenses (ISO 9342-1:2023)
Optik und optische Instrumente - Prüfgläser zur Kalibrierung von Scheitelbrechwert-
Messgeräten - Teil 1: Referenzgläser für Scheitelbrechwert-Messgeräte für die Messung
von Brillengläsern (ISO 9342-1:2023)
Optique et instruments d'optique - Verres étalons pour l'étalonnage des frontofocomètres
- Partie 1: Verres de référence pour frontofocomètres pour le mesurage des verres de
lunettes (ISO 9342-1:2023)
Ta slovenski standard je istoveten z: EN ISO 9342-1:2023
ICS:
11.040.70 Oftalmološka oprema Ophthalmic equipment
2003-01.Slovenski inštitut za standardizacijo. Razmnoževanje celote ali delov tega standarda ni dovoljeno.

EN ISO 9342-1
EUROPEAN STANDARD
NORME EUROPÉENNE
July 2023
EUROPÄISCHE NORM
ICS 11.040.70 Supersedes EN ISO 9342-1:2005
English Version
Optics and optical instruments - Test lenses for calibration
of focimeters - Part 1: Reference lenses for focimeters used
for measuring spectacle lenses (ISO 9342-1:2023)
Optique et instruments d'optique - Verres étalons pour Optik und optische Instrumente - Prüfgläser zur
l'étalonnage des frontofocomètres - Partie 1: Verres de Kalibrierung von Scheitelbrechwert-Messgeräten - Teil
référence pour frontofocomètres pour le mesurage des 1: Referenzgläser für Scheitelbrechwert-Messgeräte
verres de lunettes (ISO 9342-1:2023) für die Messung von Brillengläsern (ISO 9342-1:2023)
This European Standard was approved by CEN on 7 July 2023.

CEN members are bound to comply with the CEN/CENELEC Internal Regulations which stipulate the conditions for giving this
European Standard the status of a national standard without any alteration. Up-to-date lists and bibliographical references
concerning such national standards may be obtained on application to the CEN-CENELEC Management Centre or to any CEN
member.
This European Standard exists in three official versions (English, French, German). A version in any other language made by
translation under the responsibility of a CEN member into its own language and notified to the CEN-CENELEC Management
Centre has the same status as the official versions.

CEN members are the national standards bodies of Austria, Belgium, Bulgaria, Croatia, Cyprus, Czech Republic, Denmark, Estonia,
Finland, France, Germany, Greece, Hungary, Iceland, Ireland, Italy, Latvia, Lithuania, Luxembourg, Malta, Netherlands, Norway,
Poland, Portugal, Republic of North Macedonia, Romania, Serbia, Slovakia, Slovenia, Spain, Sweden, Switzerland, Türkiye and
United Kingdom.
EUROPEAN COMMITTEE FOR STANDARDIZATION
COMITÉ EUROPÉEN DE NORMALISATION

EUROPÄISCHES KOMITEE FÜR NORMUNG

CEN-CENELEC Management Centre: Rue de la Science 23, B-1040 Brussels
© 2023 CEN All rights of exploitation in any form and by any means reserved Ref. No. EN ISO 9342-1:2023 E
worldwide for CEN national Members.

Contents Page
European foreword . 3

European foreword
This document (EN ISO 9342-1:2023) has been prepared by Technical Committee ISO/TC 172 "Optics
and photonics" in collaboration with Technical Committee CEN/TC 170 “Ophthalmic optics” the
secretariat of which is held by DIN.
This European Standard shall be given the status of a national standard, either by publication of an
identical text or by endorsement, at the latest by January 2024, and conflicting national standards shall
be withdrawn at the latest by January 2024.
Attention is drawn to the possibility that some of the elements of this document may be the subject of
patent rights. CEN shall not be held responsible for identifying any or all such patent rights.
This document supersedes EN ISO 9342-1:2005.
Any feedback and questions on this document should be directed to the users’ national standards
body/national committee. A complete listing of these bodies can be found on the CEN website.
According to the CEN-CENELEC Internal Regulations, the national standards organizations of the
following countries are bound to implement this European Standard: Austria, Belgium, Bulgaria,
Croatia, Cyprus, Czech Republic, Denmark, Estonia, Finland, France, Germany, Greece, Hungary, Iceland,
Ireland, Italy, Latvia, Lithuania, Luxembourg, Malta, Netherlands, Norway, Poland, Portugal, Republic of
North Macedonia, Romania, Serbia, Slovakia, Slovenia, Spain, Sweden, Switzerland, Türkiye and the
United Kingdom.
Endorsement notice
The text of ISO 9342-1:2023 has been approved by CEN as EN ISO 9342-1:2023 without any
modification.
INTERNATIONAL ISO
STANDARD 9342-1
Second edition
2023-07
Optics and optical instruments — Test
lenses for calibration of focimeters —
Part 1:
Reference lenses for focimeters used
for measuring spectacle lenses
Optique et instruments d'optique — Verres étalons pour l'étalonnage
des frontofocomètres —
Partie 1: Verres de référence pour frontofocomètres pour le mesurage
des verres de lunettes
Reference number
ISO 9342-1:2023(E)
ISO 9342-1:2023(E)
© ISO 2023
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: [phone]
Email: [e-mail]
Website: www.iso.org
Published in Switzerland
ii
ISO 9342-1:2023(E)
Contents Page
Foreword .iv
1 Scope . 1
2 Normative references . 1
3 Terms and definitions . 1
4 Design requirements and recommendations for reference lenses .3
4.1 General . 3
4.2 Spherical reference lenses . 3
4.2.1 Standard spherical reference lenses . 3
4.2.2 Low power spherical reference lenses (optional) . 4
4.3 Prismatic reference lenses . 5
4.4 Cylindrical reference lens . 5
4.5 Spherocylindrical-power reference lens . 6
4.6 Reference filter . 7
4.7 Darker reference filters (optional) . 7
Annex A (informative) Design of spherical reference lenses . 9
Annex B (informative) Design and/or validation of prismatic reference lenses .14
Annex C (informative) Verification of the cylindrical reference lens .17
Bibliography .19
iii
ISO 9342-1:2023(E)
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 document 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).
ISO draws attention to the possibility that the implementation of this document may involve the use
of (a) patent(s). ISO takes no position concerning the evidence, validity or applicability of any claimed
patent rights in respect thereof. As of the date of publication of this document, ISO had not received
notice of (a) patent(s) which may be required to implement this document. However, implementers are
cautioned that this may not represent the latest information, which may be obtained from the patent
database available at www.iso.org/patents. ISO shall not be held responsible for identifying any or all
such patent rights.
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 7, Ophthalmic optics and instruments, in collaboration with the European Committee for
Standardization (CEN) Technical Committee CEN/TC 170, Ophthalmic optics, in accordance with the
Agreement on technical cooperation between ISO and CEN (Vienna Agreement).
This second edition cancels and replaces the first edition (ISO 9342-1:2005), which has been technically
revised.
The main changes are as follows:
— use of the term "reference lens" to denote these high precision test lenses;
— use of the term "verified power" instead of "conventional power";
— the addition of the spherocylindrical-power reference lens and, with some modification to tolerances,
reference filters that were added to ISO 8598-1 during its last revision;
— the optional addition of low power spherical reference lenses;
— editorial revision and clarification of Annex A on the design of reference spherical lenses
— the addition of annexes on the design and validation of prismatic reference lenses and the validation
of the cylindrical reference lens.
A list of all parts in the ISO 9342 series can be found on the ISO website.
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
INTERNATIONAL STANDARD ISO 9342-1:2023(E)
Optics and optical instruments — Test lenses for
calibration of focimeters —
Part 1:
Reference lenses for focimeters used for measuring
spectacle lenses
1 Scope
This document specifies requirements for reference lenses for the calibration and verification of
focimeters that are used for the measurement of spectacle form lenses, e.g. those complying with
ISO 8598-1. It also gives a method for the determination of the back vertex power of the reference lenses.
NOTE It is accepted that other reference lenses can also be used with powers within the given range,
manufactured to the same standard of accuracy and form, but different back vertex powers. However, only lenses
with integer nominal powers, as described in 4.1, can be used for the calibration of digitally-rounding focimeters.
2 Normative references
The following documents are referred to i
...