Standard

ISO 11421:2025

Nov 2025 Published

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Abstract

This document gives general guidance on evaluating the sources of error in optical transfer function (OTF) equipment and in using this information to estimate errors in a measurement of OTF. It also gives guidance on assessing and specifying a general uncertainty for a specific measuring equipment, as well as recommending methods of routine assessment. The main body of this document deals exclusively with the modulation transfer function (MTF) part of the OTF. The phase transfer function (PTF) is dealt with relatively briefly in Annex A.

Document information

Standard from ISO
Published: 3 November 2025
Edition: 2
Version: 1
Document type: IS
ISBN:

ICS 17.180.01
ISO TC ISO/TC 172/SC 1

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Revises: ISO 11421:1997

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ISO 11421:2025

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ISO 11421:2025

ISO 11421:2025

ISO 11421:2025

ISO 11421:1997

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ISO 11421:2025

ISO 11421:2025

ISO 11421:2025

ISO 11421:1997

Abstract

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