ISO INTERNATIONAL STANDARD 20473 First edition 2007-04-15 Optics and photonics Spectral bands Optique et photonique Bandes spectrales Reference number ISO 20473:2007(E) @ ISO 2007 ISO 20473:2007(E) PDFdisclaimer This PDF file may contain embedded typefaces. In accordance with Adobe's licensing policy, this file may be printed or viewed but shall not be edited unless the typefaces which are embedded are licensed to and installed on the computer performing the editing. In downloading this file, parties accept therein the responsibility of not infringing Adobe's licensing policy. The Iso Central Secretariat accepts no liability in this area. Adobe is a trademark of Adobe Systems Incorporated. Details of the software products used to create this PDF file can be found in the General Info relative to the file; the PDF-creation COPYRIGHTPROTECTEDDOCUMENT @ISO2007 All rights reserved. Unless otherwise specified, no part of this publication may be reproduced or utilized in any form or by any means, electronic or mechanical, including photocopying and microfilm, without permission in writing from either isO at the address below or IsO's member body in the country of the requester. ISO copyright office Case postale 56 : CH-1211 Geneva 20 Tel. + 41 22 749 01 11 Fax + 41 22 749 09 47 E-mail [email protected] Web www.iso.org Published in Switzerland @ ISO 2007 - All rights reserved ISO 20473:2007(E) Foreword IsO (the International Organization for Standardization) is a worldwide federation of national standards bodies (IsO member bodies). The work of preparing International Standards is normally carried out through IsO technicalcommittees.Eachmemberbodyinterestedinasubjectforwhichatechnical committeehasbeen International Electrotechnical Commission (IEC) on all matters of electrotechnical standardization. International Standards are drafted in accordance with the rules given in the ISO/lEc Directives, Part 2 The main task of technical committees is to prepare International Standards. Draft International Standards adopted by the technical committees are circulated to the member bodies for voting. Publication as an International Standard requires approval by at least 75 % of the member bodies casting a vote. Attention is drawn to the possibility that some of the elements of this document may be the subject of patent rights. IsO shall not be held responsible for identifying any or all such patent rights ISO 20473 was prepared by Technical Committee ISO/TC 172, Optics and photonics. ganizationfor'Standar dizalion'ghts reserved ii ISO 20473:2007(E) Introduction This International Standard is intended to support the delimitation, designation and description of the spectral wavelength regions of optical radiation for applications in the field of optics and photonics. @ ISo 2007 - All rights reserved INTERNATIONAL STANDARD ISO20473:2007(E) Optics and photonics Spectral bands 1 Scope This International Standard specifies the division of optical radiation into spectral bands for optics and optical radiation in occupational areas. Definitions of spectral bands The spectral bands are specified by the given wavelength limits. The band limits are included in both adjacent bands. The relation of frequency, wave number and photon energy to the wavelength holds strictly, only for vacuum; if applicable, the refractive index of the medium of propagation shall be taken into account. As given in Table 1, the usage of the term “light" is restricted to designate“visible radiation", i.e. the wavelength range from 380 nm to 780 nm and should not be used for optical radiation outside the visible range. Table 1 Spectral bands for optics and photonics Spectral bandsa Wavelength Frequency Wavenumber Photon energy Designation of the radiation Short designation 元 v a Qe nm THz cm-1 ev extreme Uv EUV 1 to 100 3 × 105 to 3 000 107 to 105 1 240 to 12,4 vacuum Uv vUv 100 to 190 3 000 to 1 580 105 to 53 000 12,4 to 6,5 Ultraviolet UV-C radiation deep Uv UV DUV 190 to 2