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BSI 22/30406184 DC:2022 Edition

BSI 22/30406184 DC:2022 Edition

$13.70

BS EN ISO 9342-1. Optics and optical instruments. Test lenses for calibration of focimeters – Part 1. Reference lenses for focimeters used for measuring spectacle lenses

Published By Publication Date Number of Pages
BSI 2022 23
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PDF Catalog

PDF Pages PDF Title
6 Foreword
7 1 Scope
2 Normative references
3 Terms and definitions
9 4 Design requirements and recommendations for reference lenses
4.1 General
4.2 Spherical reference lenses
4.2.1 Standard reference lenses
10 4.2.2 Low power reference lenses (optional)
4.3 Prismatic reference lenses
11 4.4 Cylindrical reference lenses
4.5 Spherocylindrical-power reference lenses
12 4.6 Reference filter
4.7 Darker reference filters (optional)
13 5 Uncertainties and Tolerances
5.1 Uncertainties for spherical reference lenses
14 5.2 Uncertainties for prismatic reference lenses
5.3 Tolerance for the axis of the cylindrical reference lens
15 Annex A (informative) Design of spherical reference lenses
19 Annex B (informative) Design and/or validation of prismatic reference lenses
22 Annex C (informative) Verification of the cylindrical reference lens

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BSI 22/30406184 DC
$13.70