ISO 14490-5:2021 光学およびフォトニクス—伸縮システムのテスト方法—パート5：透過率のテスト方法 | ページ 2

Foreword

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The procedures used to develop this document and those intended for its further maintenance are described in the ISO/IEC Directives, Part 1. In particular, the different approval criteria needed for the different types of ISO documents should be noted. This document was drafted in accordance with the editorial rules of the ISO/IEC Directives, Part 2 (see www.iso.org/directives ).

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This document was prepared by Technical Committee ISO/TC 172, Optics and photonics, Subcommittee SC 4, Telescopic systems.

This third edition cancels and replaces the second edition (ISO 14490-5:2017), which has been technically revised.

The main changes compared to the previous edition are as follows:

• updates in Clause 5 , in particular 5.7."Veiling glare stop" was deleted, clarification of requirements on"Integration sphere", addition of 5.9;
• updates in Clause 9, in particular 9.1 and 9.2. The function V(λ) for the 2° observer was replaced by the function V10(λ) for the 10° observer to be consistent with 9.2, where the function V'(λ) for the 10° observer [now called V’10(λ)] was already used;
• clarification of requirements in Clause 10;
• addition of B.4;

A list of all parts in the ISO 14490 series can be found on the ISO website.

1 Scope

This document specifies the test methods for the determination of the transmittance of telescopic systems and telescopic observational instruments.

2 Normative references

The following documents are referred to in the text in such a way that some or all of their content constitutes requirements of this document. For dated references, only the edition cited applies. For undated references, the latest edition of the referenced document (including any amendments) applies.

3 Terms and definitions

For the purposes of this document, the terms and definitions given in ISO 14132-1 apply.

ISO and IEC maintain terminological databases for use in standardization at the following addresses:

Bibliography