BS EN ISO 9342-1:2023
Current
The latest, up-to-date edition.
Reference lenses for focimeters used for measuring spectacle lensesOptics and optical instruments. Test lenses for calibration of focimeters
Hardcopy , PDF
English
19-07-2023
Important note : Users cannot be edited or removed once added to your Multi user PDF.| Committee |
CH/172/3
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| DocumentType |
Standard
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| Pages |
0
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| PublisherName |
British Standards Institution
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| Status |
Current
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| Supersedes |
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 ISO8598-1. 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.
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