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1、BRITISH STANDARD BS ISO 7589:2002 Photography Illuminants for sensitometry Specifications for daylight, incandescent tungsten and printer ICS 37.040.10 ? Licensed Copy: sheffieldun sheffieldun, na, Sun Nov 26 13:09:03 GMT+00:00 2006, Uncontrolled Copy, (c) BSI BS ISO 7589:2002 This British Standard,
2、 having been prepared under the direction of the Consumer Products and Services Sector Policy and Strategy Committee, was published under the authority of the Standards Policy and Strategy Committee on 12 August 2002 BSI 12 August 2002 ISBN 0 580 40237 1 National foreword This British Standard repro
3、duces verbatim ISO 7589:2002 and implements it as the UK national standard. It supersedes BS 1380-4:1986 which is withdrawn. The UK participation in its preparation was entrusted to Technical Committee CPW/42, Photography, which has the responsibility to: A list of organizations represented on this
4、committee can be obtained on request to its secretary. Cross-references The British Standards which implement international publications 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”
5、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 for its correct application. Compliance with a British Standard does not of itself confer immunity from legal obliga
6、tions. aid enquirers to understand the text; present to the responsible international/European committee any enquiries on the interpretation, or proposals for change, and keep the UK interests informed; monitor related international and European developments and promulgate them in the UK. Summary of
7、 pages This document comprises a front cover, an inside front cover, the ISO title page, pages ii to v, a blank page, pages 1 to 15, and a back cover. The BSI copyright date displayed in this document indicates when the document was last issued. Amendments issued since publication Amd. No. DateComme
8、nts Licensed Copy: sheffieldun sheffieldun, na, Sun Nov 26 13:09:03 GMT+00:00 2006, Uncontrolled Copy, (c) BSI Reference number ISO 7589:2002(E) INTERNATIONAL STANDARD ISO 7589 Second edition 2002-02-01 Photography Illuminants for sensitometry Specifications for daylight, incandescent tungsten and p
9、rinter Photographie Illuminants sensitomtriques Spcifications pour la lumire du jour, la lumire artificielle et la tireuse BS ISO 7589:2002 Licensed Copy: sheffieldun sheffieldun, na, Sun Nov 26 13:09:03 GMT+00:00 2006, Uncontrolled Copy, (c) BSI IS:9857 O2002(E) lcsid FDParemi ihTs PDF file mac ytn
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14、 fofice saCe tsopale 65 eneG 1121-HC 02 av leT. 4 + 10 947 22 1 11 xaF0 947 22 14 + 9 74 E-mail coirypthgiso.c h Web ww.wiso.ch Prnietdi nS wztierland ii I SO 2002 Allr ithgsr ese devr BS ISO 7589:2002 ii Licensed Copy: sheffieldun sheffieldun, na, Sun Nov 26 13:09:03 GMT+00:00 2006, Uncontrolled Co
15、py, (c) BSI IS:9857 O2002(E) I SO 2002 All irthgs ersedevr iii Contents Page Foreword.iv Introduction.v 1 Scope1 2 Normative references1 3 Terms and definitions .1 4 ISO sensitometric illuminants2 4.1 General2 4.2 ISO sensitometric daylight illuminant.2 4.3 ISO sensitometric studio tungsten illumina
16、nt3 4.4 ISO sensitometric photoflood illuminant3 4.5 ISO sensitometric printer illuminant3 5 Camera films: Spectral distribution index (ISO/SDI)3 5.1 General3 5.2 Weighted spectral sensitivity values.3 5.3 Calculation of the ISO/SDI 3 5.4 Tolerances for ISO/SDI4 6 Black-and-white papers: Spectral di
17、stribution index (ISO/SDI)4 6.1 General4 6.2 Weighted spectral sensitivity values.4 6.3 Calculation of the ISO/SDI 4 6.4 Tolerances for ISO/SDI5 Annex A (informative) Example sources 9 Annex B (informative) Exposure calculations12 Annex C (informative) Average colour film sensitivities.13 Annex D (i
18、nformative) Average black-and-white printing paper sensitivities 14 Bibliography15 BS ISO 7589:2002 iii Licensed Copy: sheffieldun sheffieldun, na, Sun Nov 26 13:09:03 GMT+00:00 2006, Uncontrolled Copy, (c) BSI IS:9857 O2002(E) vi I SO 2002 All irthgs ersedevr Foreword ISO (the International Organiz
19、ation 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 technical committees. Each member body interested in a subject for which a technical committee has been established
20、 has the right to be represented on that committee. International 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. I
21、nternational Standards are drafted in accordance with the rules given in the ISO/IEC Directives, Part 3. 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. Publ
22、ication 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 International Standard may be the subject of patent rights. ISO shall not be held responsible for identifying any or al
23、l such patent rights. ISO 7589 was prepared by Technical Committee ISO/TC 42, Photography. This second edition cancels and replaces the first edition (ISO 7589:1984), which has been technically revised and enlarged to include a standard sensitometric illuminant for black-and-white papers. Annexes A
24、to D of this International Standard are for information only. BS ISO 7589:2002 iv Licensed Copy: sheffieldun sheffieldun, na, Sun Nov 26 13:09:03 GMT+00:00 2006, Uncontrolled Copy, (c) BSI IS:9857 O2002(E) I SO 2002 All irthgs ersedevr v Introduction Colour and black-and-white camera films are most
25、commonly designed for use with three light sources, these being daylight, studio tungsten (type B) and photoflood (type A), while black-and-white papers are most commonly used with enlargers employing incandescent tungsten sources. This International Standard specifies three corresponding illuminant
26、s for film sensitometry and one for black-and-white paper sensitometry, since most meaningful results are obtained when exposing conditions match those of actual film or paper use. Two other important photographic light sources for film, the electronic flashtube and blue photoflash lamps, give light
27、 of a colour that approximates daylight so that the sensitometric daylight illuminant also serves for films used with them. This International Standard constitutes a revision of the first edition, ISO 7589:1984. It differs from the first edition in that it includes a standard sensitometric illuminan
28、t for black-and-white papers (the first edition dealt with camera film illuminants only). No standard exists for the determination of the speeds of colour papers. The illuminants described in this International Standard are used in ISO 3028, ISO 6728 and other International Standards which describe
29、methods for determining the speed of various types of sensitized products. BS ISO 7589:2002 v Licensed Copy: sheffieldun sheffieldun, na, Sun Nov 26 13:09:03 GMT+00:00 2006, Uncontrolled Copy, (c) BSI Licensed Copy: sheffieldun sheffieldun, na, Sun Nov 26 13:09:03 GMT+00:00 2006, Uncontrolled Copy,
30、(c) BSI INTENRATIONAL TSANDADR IS:9857 O2002(E) I SO 2002 All irthgs ersedevr 1 Photography Illuminants for sensitometry Specifications for daylight, incandescent tungsten and printer 1 Scope This International Standard specifies the spectral characteristics of illuminants for sensitometry appropria
31、te for evaluating camera films used for pictorial photography in natural daylight, studio tungsten and photoflood, including colour and black-and-white films, both reversal and negative types, and for evaluating black-and-white papers used with incandescent tungsten printers. It also describes metho
32、ds for evaluating the acceptability of illuminants for sensitometry and specifies tolerances. It does not include illuminants for use with colour papers, since this would need to take account of the coloured mask of the negative material, for which no standard information is at present available. 2
33、Normative references The following normative documents contain provisions which, through reference in this text, constitute provisions of this International Standard. For dated references, subsequent amendments to, or revisions of, any of these publications do not apply. However, parties to agreemen
34、ts based on this International Standard are encouraged to investigate the possibility of applying the most recent editions of the normative documents indicated below. For undated references, the latest edition of the normative document referred to applies. Members of ISO and IEC maintain registers o
35、f currently valid International Standards. ISO 3028:1984, Photography Camera flash illuminants Determination of ISO spectral distribution index (ISO/SDI) ISO 6728:1983, Photography Camera lenses Determination of ISO colour contribution index (ISO/CCI) 3 Terms and definitions For the purposes of this
36、 International Standard, the following terms and definitions apply. 3.1 source physical emitter of energy 3.2 illuminant light impinging on a sensitized material and having a specific spectral power distribution not necessarily provided directly by a source and not necessarily realizable by a source
37、 3.3 relative spectral power distribution description of the spectral character of radiation by the relative spectral distribution of some radiometric quantity (radiant flux, radiant intensity) BS ISO 7589:2002 1 Licensed Copy: sheffieldun sheffieldun, na, Sun Nov 26 13:09:03 GMT+00:00 2006, Uncontr
38、olled Copy, (c) BSI IS:9857 O2002(E) 2 I SO 2002 All irthgs ersedevr 3.4 distribution temperature thermodynamic temperature of the full radiator for which the ordinates of the spectral distribution curve of its radiance are proportional, in the visible region, to those of the distribution curve of t
39、he radiation considered 3.5 photographic daylight relative spectral power distribution of typical daylight having a correlated colour temperature of approximately 5 500 K NOTE This describes the combination of skylight and sunlight when the sun is about 40 above the horizon with a clear atmosphere,
40、and is designated as D55. 3.6 spectral distribution index SDI three-number designation for camera films which describes the degree to which a light source is expected to change the overall colour of a photograph relative to that obtained with a specified illuminant, and two-number designation for bl
41、ack-and-white enlarging papers which describes the degree to which a light source affects the relative contributions from emulsion sensitivity and dye sensitivity 4 ISO sensitometric illuminants 4.1 General This International Standard is concerned with the simulation of the spectral quality of radia
42、tion incident on the film (not the camera) or on the enlarger baseboard (not the enlarger lamp). In order to realize this simulation, a given photographic illuminant (which is concerned with the light illuminating the subject matter or the light before passing through the optical system of a printer
43、) has to be suitably modulated. For the purposes of this International Standard, the ISO standard camera lens specified in ISO 6728 has been taken as the best available modulator for which standard data are available. The relative spectral power distributions of the four ISO sensitometric illuminant
44、s described in this International Standard are normally obtained by operating a lamp at a specified condition and modulating the flux with selectively absorbing filters of suitable spectral transmittance. It should be emphasized that this International Standard specifies the relative spectral distri
45、bution of power incident on the exposure plane at 10 nm intervals, i.e. the relative spectral power emitted by a source and its modulation by all elements in the sensitometer that affect the spectral quality, for example filters, mirrors and optical wedge. 4.2 ISO sensitometric daylight illuminant T
46、his is suitable for the sensitometry of “daylight balanced” colour films and is also normally used for black-and- white camera films. These films are designed to be exposed in photographic daylight (see 3.5) or with flash. The spectral power distribution used to represent photographic daylight was t
47、aken from the data of Judd et al.4 who give typical spectral irradiance data for five different conditions of daylight (skylight and sunlight plus skylight). Data corresponding to a correlated colour temperature of 5 500 K were selected as the most appropriate for photography and designated as D55.
48、This is the prevailing condition in temperate zones during the daylight hours recommended for colour photography. The ISO sensitometric daylight illuminant is defined as the product of the spectral power distribution of photographic daylight (D55) and the spectral transmittance of the International
49、Standard camera lens, ( ) . The aim values, S, for the relative spectral power distribution for this illuminant are given in Table 1. An illuminant complying with these values within the tolerances specified in 5.4 may be designated “ISO sensitometric daylight illuminant”. BS ISO 7589:2002 2 Licensed Copy: sheffieldun sheffieldun, na, Sun Nov 26 13:09:03 GMT+00:00 2006, Uncontrolled Copy, (c) BSI IS:9857 O2002(E) I SO 2002 All irthgs ersedevr 3 4.3 ISO sens
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