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ISO 11421:2025

Optics and photonics — Uncertainty of optical transfer function (OTF) measurement ISO 11421:2025

Publication date:   Nov 3, 2025

General information

60.60   Standard published   Nov 3, 2025

ISO

ISO/TC 172/SC 1 Fundamental standards

International Standard

17.180.01   Optics and optical measurements in general

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Scope

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.

Life cycle

PREVIOUSLY

WITHDRAWN
ISO 11421:1997

NOW

PUBLISHED
ISO 11421:2025
60.60 Standard published
Nov 3, 2025




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