INTERNATIONAL STANDARD ISO 14490-5 First edition 2005-10-15 AMENDMENT 2015-02-01 Optics and optical instruments — Test methods for telescopic systems — Part 5: Test methods for transmittance AMENDMENT Optique et instruments d’optique — Méthodes d’essai pour systèmes télescopiques — Partie 5: Méthodes d’essai du facteur de transmission AMENDEMENT Reference number ISO 14490-5:2005/Amd.1:2015(E) © ISO 2015 ISO 14490-5:2005/Amd.1:2015(E) COPYRIGHT PROTECTED DOCUMENT © ISO 2015 the requester Case postale 56 • CH-1211 Geneva 20 Tel + 41 22 749 01 11 Fax + 41 22 749 09 47 Web www.iso.org ii © ISO 2015 – All rights reserved ISO 14490-5:2005/Amd.1:2015(E) Foreword committee has been established has the right to be represented on that committee International The procedures used to develop this document and those intended for its further maintenance are www.iso.org/directives) on the ISO list of patent declarations received (see www.iso.org/patents) constitute an endorsement Telescopic systems © ISO 2015 – All rights reserved Optics and photonics iii ISO 14490-5:2005/Amd.1:2015(E) Optics and optical instruments — Test methods for telescopic systems — Part 5: Test methods for transmittance AMENDMENT Update references to ISO/CIE 10526 and ISO/CIE 10527 all instances ISO/CIE 10526 and ISO/CIE 10527 are referenced Colorimetry — Part 2: CIE standard illuminants Colorimetry — Part 1: CIE standard colorimetric observers Colorimetry — Part 3: CIE tristimulus values Colorimetry — Part 4: CIE 1976 L*a*b* Colour space scale diagram Colorimetry — Part 5: CIE 1976 L*u*v* Colour space and u’, v’ uniform chromaticity Page 3, Subclause 5.5 Add the following paragraphs: to-noise requirements of the detector available aperture” Page 3, Subclause 5.6 Add the following paragraph: © ISO 2015 – All rights reserved ISO 14490-5:2005/Amd.1:2015(E) Page 11, Annex B B.3 CIELAB values This clause is a description of an alternative method for the determination of a colour hue (tint) of the visible image L a observer are taken from b* The value L Xn Yn Zn for the white point of D 65 and the 10° Table B.3 — Normalized standardized spectral values X10W = Xn; Y10W = Yn; Z10W = Zn Standard illuminant x10 y10 z10 X10W Y10W Z10W D 65 From the spectral transmittance the values X Y Z X Y Z* are calculated for X/Xn > (6/29)3 for X/Xn for Y/Yn > (6/29)3 for Y/Yn for Z/Zn > (6/29)3 for Z/Zn With X Y Z a* and b* are calculated Coordinate a* Coordinate b* from the white point) C*ab is calculated according to the following equation: (distance © ISO 2015 – All rights reserved ISO 14490-5:2005/Amd.1:2015(E) To determine the tint the signs of a b taken from the b*/a Table B.4 — Colour naming conventions – tint name a* + + b* b*/a orange (O) green (G) red (R) green (G) red (R) purple (P) © ISO 2015 – All rights reserved ISO 14490-5:2005/Amd.1:2015(E) Price based on pages © ISO 2015 – All rights reserved