NF EN ISO 9342-1

NF EN ISO 9342-1

October 2005
Standard Cancelled

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 specifies requirements for test lenses for the calibration of focimeters that are used for the measurement of spectacle form lenses.

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National standards and national normative documents

Publication date

October 2005

Number of pages

15 p.

Reference

NF EN ISO 9342-1

ICS Codes

11.040.70   Ophthalmic equipment

Classification index

S12-134-1

Print number

1 - 26/09/2005

International kinship

ISO 9342-1:2005

European kinship

EN ISO 9342-1:2005
Sumary
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 specifies requirements for test lenses for the calibration of focimeters that are used for the measurement of spectacle form lenses.

Standard replaced by (1)
NF EN ISO 9342-1
July 2023
Standard Current
Optics and optical instruments - Test lenses for calibration of focimeters - Part 1 : reference lenses for focimeters used for measuring spectacle lenses

<p class="MsoBodyText"><span lang="EN-GB">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.</span></p> <p class="Note"><span lang="EN-GB">NOTE<span style="mso-tab-count: 1;">            </span>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 <a href="#Section_sec_4.1">4.1</a>, can be used for the calibration of digitally-rounding focimeters.</span></p>

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