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BSI BS EN ISO 9342-1:2023

Optics and optical instruments. Test lenses for calibration of focimeters -- Test lenses for focimeters used for measuring spectacle lenses
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BSI BS EN ISO 9342-1:2023

Optics and optical instruments. Test lenses for calibration of focimeters -- Test lenses for focimeters used for measuring spectacle lenses

PUBLISH DATE 2023
PAGES 26
BSI BS EN 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.
SDO BSI: British Standards Institution
Document Number ISO 9342-1
Publication Date July 19, 2023
Language en - English
Page Count 26
Revision Level
Supercedes
Committee CH/172/3
Publish Date Document Id Type View
July 19, 2023 BS EN ISO 9342-1:2023 Revision
July 13, 2005 BS EN ISO 9342-1:2005 Revision