BS-ISO-23539-2005.pdf
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1、BRITISH STANDARD BS ISO 23539:2005 Photometry The CIE system of physical photometry ICS 17.180.01 ? Licensed Copy: sheffieldun sheffieldun, na, Sun Nov 26 04:34:54 GMT+00:00 2006, Uncontrolled Copy, (c) BSI BS ISO 23539:2005 This British Standard was published under the authority of the Standards Po
2、licy and Strategy Committee on 23 January 2006 BSI 23 January 2006 ISBN 0 580 46881 X National foreword This British Standard reproduces verbatim ISO 23539:2005 and implements it as the UK national standard. The UK participation in its preparation was entrusted by Technical Committee CPL/34, Lamps a
3、nd related equipment, to Subcommittee CPL/34/5, Photometry and light classifications, which has the responsibility to: A list of organizations represented on this subcommittee can be obtained on request to its secretary. Cross-references The British Standards which implement international publicatio
4、ns referred to in this document may be found in the BSI Catalogue under the section entitled “International Standards Correspondence Index”, or by using the “Search” facility of the BSI Electronic Catalogue or of British Standards Online. This publication does not purport to include all the necessar
5、y provisions of a contract. Users are responsible for its correct application. Compliance with a British Standard does not of itself confer immunity from legal obligations. aid enquirers to understand the text; present to the responsible international/European committee any enquiries on the interpre
6、tation, or proposals for change, and keep UK interests informed; monitor related international and European developments and promulgate them in the UK. Summary of pages This document comprises a front cover, an inside front cover, the ISO title page, pages ii and iii, a blank page, pages 1 to 18, an
7、 inside back cover and a back cover. The BSI copyright notice displayed in this document indicates when the document was last issued. Amendments issued since publication Amd. No. DateComments Licensed Copy: sheffieldun sheffieldun, na, Sun Nov 26 04:34:54 GMT+00:00 2006, Uncontrolled Copy, (c) BSI R
8、eference number ISO 23539:2005(E) CIE S 010/E:2004 INTERNATIONAL STANDARD ISO 23539 CIE S 010/E First edition 2005-08-01 Photometry The CIE system of physical photometry Photomtrie Le systme CIE de photomtrie physique BS ISO 23539:2005 Licensed Copy: sheffieldun sheffieldun, na, Sun Nov 26 04:34:54
9、GMT+00:00 2006, Uncontrolled Copy, (c) BSI ii Licensed Copy: sheffieldun sheffieldun, na, Sun Nov 26 04:34:54 GMT+00:00 2006, Uncontrolled Copy, (c) BSI iii Foreword ISO (the International Organization for Standardization) is a worldwide federation of national standards bodies (ISO member bodies). T
10、he work of preparing International Standards is normally carried out through ISO technical committees. Each member body interested in a subject for which a technical committee has been established has the right to be represented on that committee. International organizations, governmental and non-go
11、vernmental, in liaison with ISO, also take part in the work. ISO collaborates closely with the International Electrotechnical Commission (IEC) on all matters of electrotechnical standardization. ISO 23539 was prepared as Standard CIE S 010/E by the International Commission on Illumination, which has
12、 been recognized by the ISO Council as an international standardizing body. It was adopted by ISO under a special procedure which requires approval by at least 75 % of the member bodes casting a vote, and is published as a joint ISO/CIE edition. The International Commission on Illumination (abbrevia
13、ted as CIE from its French title) is an organization devoted to international cooperation and exchange of information among its member countries on all matters relating to the science and art of lighting. ISO 23539 was prepared by CIE Technical Committee 2-35 CIE Standard for V() and V(). BS ISO 235
14、39:2005 Licensed Copy: sheffieldun sheffieldun, na, Sun Nov 26 04:34:54 GMT+00:00 2006, Uncontrolled Copy, (c) BSI blank Licensed Copy: sheffieldun sheffieldun, na, Sun Nov 26 04:34:54 GMT+00:00 2006, Uncontrolled Copy, (c) BSI 1 PHOTOMETRY - THE CIE SYSTEM OF PHYSICAL PHOTOMETRY INTRODUCTION The vi
15、sual brightness of a light source depends not only on the amount of radiation it emits but also on its spectral composition and on the visual response function of the observer viewing it. Because human visual response varies at different light levels and from person to person, precise photometry req
16、uires the definition of representative standard observers. The CIE system of physical photometry specifies procedures for the quantitative evaluation of optical radiation in terms of the spectral luminous efficiency functions of two such standard observers. One, V(?), represents photopic vision and
17、the other, V?(?), scotopic vision. Used in conjunction with the SI photometric base unit, the candela, these functions constitute a system that enables the values of photometric quantities for all types of luminous source to be precisely determined, regardless of the spectral composition of the radi
18、ation emitted. 1. SCOPE This international Standard specifies the characteristics of the system of physical photometry established by the CIE and accepted as the basis for the measurement of light. It defines the photometric quantities, units and standards that make up the CIE system of physical pho
19、tometry and that have been officially accepted by the Comit International des Poids et Mesures (CIPM). They comprise: ?the definition of photometric quantities and units, ?the definition of CIE standard spectral luminous efficiency functions for photopic and scotopic vision, ?the definition of a CIE
20、 standard photometric observer that conforms to these functions, ?the definition of maximum luminous efficacies for photopic and scotopic vision. An informative annex provides a vocabulary of related terms. 2. PHOTOMETRIC QUANTITIES Photometric quantities are defined in the International Lighting Vo
21、cabulary (ILV) (CIE, 1987a). 2.1 Luminous flux The fundamental physical quantity used in optical radiometry is the radiant flux or radiant power,?e, measured in watts, which is emitted by a source of radiation, transmitted by a medium of propagation, or received at a surface. The corresponding photo
22、metric quantity is: luminous flux (? ?v) (see ILV 845-01-25) quantity derived from radiant flux ?e by evaluating the radiation according to its action upon the CIE standard photometric observer The procedure for deriving ?v? from ?e? is defined in 4.3, below. 2.2 Other quantities The following are t
23、he photometric quantities that correspond to the most important radiometric quantities defined in the International Lighting Vocabulary. luminous energy (also known as quantity of light) (Qv) (see ILV 845-01-28) time integral of the luminous flux ?v over a given duration ?t ? ? ? t tQd vv ? luminous
24、 intensity (of a source in a given direction) (Iv) (see ILV 845-01-31) quotient of the luminous flux d?v leaving the source and propagated in the element of solid angle d? containing the given direction, by the element of solid angle BS ISO 23539:2005 Licensed Copy: sheffieldun sheffieldun, na, Sun
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