BS ISO 23539-2006 Photometry - The CIE system of physical photometry《光度测量法 物理光度测量法的CIE系统》.pdf
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1、 g49g50g3g38g50g51g60g44g49g42g3g58g44g55g43g50g56g55g3g37g54g44g3g51g40g53g48g44g54g54g44g50g49g3g40g59g38g40g51g55g3g36g54g3g51g40g53g48g44g55g55g40g39g3g37g60g3g38g50g51g60g53g44g42g43g55g3g47g36g58ICS 17.180.01Photometry The CIE system of physical photometry BRITISH STANDARDBS ISO 23539:2005BS I
2、SO 23539:2005This British Standard was published under the authority of the Standards Policy and Strategy Committee on 23 January 2006 BSI 23 January 2006ISBN 0 580 46881 XCross-referencesThe British Standards which implement international publications referred to in this document may be found in th
3、e 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 necessary provisions of a contract. Users are responsible f
4、or its correct application. Compliance with a British Standard does not of itself confer immunity from legal obligations.Summary of pagesThis 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 inside back cover and a back co
5、ver.The BSI copyright notice displayed in this document indicates when the document was last issued.Amendments issued since publicationAmd. No. Date CommentsA list of organizations represented on this subcommittee can be obtained on request to its secretary. present to the responsible international/
6、European committee any enquiries on the interpretation, or proposals for change, and keep UK interests informed; monitor related international and European developments and promulgate them in the UK.National forewordThis British Standard reproduces verbatim ISO 23539:2005 and implements it as the UK
7、 national standard.The UK participation in its preparation was entrusted by Technical Committee CPL/34, Lamps and related equipment, to Subcommittee CPL/34/5, Photometry and light classifications, which has the responsibility to: aid enquirers to understand the text;Reference numberISO 23539:2005(E)
8、CIE S 010/E:2004INTERNATIONAL STANDARD ISO23539CIE S 010/EFirst edition2005-08-01Photometry The CIE system of physical photometry Photomtrie Le systme CIE de photomtrie physique BS ISO 23539:2005ii iiiForeword ISO (the International Organization for Standardization) is a worldwide federation of nati
9、onal standards bodies (ISO member bodies). The 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. Internat
10、ional organizations, governmental and non-governmental, 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 Interna
11、tional Commission on Illumination, which has 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 Intern
12、ational Commission on Illumination (abbreviated 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
13、-35 CIE Standard for V() and V(). BS ISO 23539:2005blank1PHOTOMETRY - THE CIE SYSTEM OF PHYSICAL PHOTOMETRY INTRODUCTIONThe visual 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 observe
14、r viewing it. Because human visual response varies at different light levels and from person to person, precise photometry requires the definition of representative standard observers. The CIE system of physical photometry specifies procedures for the quantitative evaluation of optical radiation in
15、terms of the spectral luminous efficiency functions of two such standardobservers. One, V(O), represents photopic vision and the other, V (O), scotopic vision. Used in conjunction with the SI photometric base unit, the candela, these functions constitute asystem that enables the values of photometri
16、c quantities for all types of luminous source to be precisely determined, regardless of the spectral composition of the radiation 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
17、measurement of light. It defines thephotometric quantities, units and standards that make up the CIE system of physical photometry and that have been officially accepted by the Comit International des Poids etMesures (CIPM). They comprise: the definition of photometric quantities and units, the defi
18、nition of CIE standard spectral luminous efficiency functions for photopic and scotopic vision, the definition of a CIE standard photometric observer that conforms to these functions, the definition of maximum luminous efficacies for photopic and scotopic vision. An informative annex provides a voca
19、bulary of related terms. 2. PHOTOMETRIC QUANTITIES Photometric quantities are defined in the International Lighting Vocabulary (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 emit
20、ted by a source of radiation, transmitted by a medium of propagation, or received at a surface. The corresponding photometric quantity is: luminous flux ()v) (see ILV 845-01-25)quantity derived from radiant flux )eby evaluating the radiation according to its action uponthe CIE standard photometric o
21、bserverThe procedure for deriving )v from )e is defined in 4.3, below. 2.2 Other quantities The following are the photometric quantities that correspond to the most important radiometric quantities defined in the International Lighting Vocabulary. luminous energy (also known as quantity of light) (Q
22、v) (see ILV 845-01-28)time integral of the luminous flux )vover a given duration t ttQ dvv)luminous intensity (of a source in a given direction) (Iv) (see ILV 845-01-31) quotient of the luminous flux d)vleaving the source and propagated in the element of solid angle d: containing the given direction
23、, by the element of solid angle BS ISO 23539:20052 ddvv) I luminance (in a given direction, at a given point of a real or imaginary surface) (Lv) (see ILV 845-01-35)quantity defined by the formula ALdcosddvv T)where d)vis the luminous flux transmitted by an elementary beam passing through the given
24、point and propagating in the solid angle d: containing the given direction; dA is the area of a section of that beam containing the given point; T is the angle between the normal to thatsection and the direction of the beamilluminance (at a point of a surface) (Ev) (see ILV 845-01-38)quotient of the
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