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ILNAS-EN ISO 9342-1:2023
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07/2023
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)
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)
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Abstract
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.
Status
| Standard - Active |
Origin
| Technical Committee : |
| CEN/TC 170 : Ophthalmic optics |
Implementation
| start of the vote on the project | 09/06/2022 | date of ratification (dor) | 07/07/2023 | |||
| end of the vote on the project | 02/09/2022 | date of anouncement (doa) | 31/10/2023 | |||
| start of the vote on the final project | 13/04/2023 | date of publication (dop) | 31/01/2024 | |||
| end of the vote on the final project | 06/06/2023 | date of withdrawal (dow) | 31/01/2024 |
|
Publication Official Journal
of the Grand-Duchy of Luxembourg |
|
| Reference |
Relations
| Relations to older standards |
| ILNAS-EN ISO 9342-1:2005 |
| Relations to international standards |
| ISO 9342-1:2023 |
| ISO 9342-1 |
International Classification for Standards (ICS codes) :
| 11.040.70 : Ophthalmic equipment |
