Optics and optical instruments - Uncertainty of optical transfer function (OTF) measurement (ISO 11421:2025)
Abstract
The optical transfer function (OTF) is one of the main criteria used for objectively evaluating the image-forming capability of optical, electrooptical and photographic systems. This document lists the main sources of inaccuracy in OTF measuring equipment and provides guidance on how these can be assessed and how the results of these assessments can be used in estimating the error band in any measurement of OTF. One of the aims in preparing this document is to encourage the setting of more realistic uncertainty levels for the results of OTF measurements. Another is to encourage the use of methods of expressing the accuracy of OTF test equipment which recognize the fact that the accuracy of a particular measurement is a function of both the equipment and the test piece.
Begin
2026-02-19
Planned document number
DIN ISO 11421
Project number
02703514
Responsible national committee
NA 027-01-02-01 AK - General optical test methods
Responsible international committee
ISO/TC 172/SC 1/WG 1 - General optical test methods
