ISO 19012-4:2024

International
Standard
ISO 19012-4
First edition
Microscopes — Designation of
2024-05
microscope objectives —
Part 4:
Polarization characteristics
Microscopes — Désignation des objectifs de microscope —
Partie 4: Caractéristiques de polarisation
Reference number
© ISO 2024
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ii
Contents Page
Foreword .iv
Introduction .v
1 Scope . 1
2 Normative references . 1
3 Terms and definitions . 1
4 Requirements . 1
4.1 General .1
4.2 Extinction ratio .1
4.3 Definition of objectives named POL, PO or P .2
4.4 Measurement procedure .2
4.4.1 General .2
4.4.2 Measurement environment .2
4.4.3 Microscope settings .2
4.4.4 Measurement of extinction ratio .3
Bibliography . 5

iii
Foreword
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This document was prepared by Technical Committee ISO/TC 172 Optics and photonics, Subcommittee SC 5
Microscopes and endoscopes.
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iv
Introduction
The polarization characteristics of microscope objectives are important parameters that allow users
to choose the appropriate product for a given application. This document shows the requirement(s)
for the marking of polarizing objective lenses along with the measurement procedure, environmental
conditions, and microscope settings to be carried out correctly in order to arrive at the stated performance
characteristics.
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