ASTM_E_2152_-_12_2017.pdf

Designation:E215212(Reapproved 2017)Standard Practice forComputing the Colors of Fluorescent Objects fromBispectral Photometric Data1This standard is issued under the fixed designation E2152;the number immediately following the designation indicates the year oforiginal adoption or,in the case of revision,the year of last revision.A number in parentheses indicates the year of last reapproval.Asuperscript epsilon()indicates an editorial change since the last revision or reapproval.INTRODUCTIONThe fundamental procedure for evaluating the color of a fluorescent specimen is to obtain bispectralphotometric data for specified irradiating and viewing geometries,and from these data to computetristimulus values based on a CIE(International Commission on Illumination)standard observer anda CIE standard illuminant.Procedures for such computation are contained in this practice.Thispractice also contains procedures for computing illuminant-specific spectral radiance factor valuesfrom illuminant-independent bispectral photometric data.1.Scope1.1 This practice provides the values and practical compu-tation procedures needed to obtain tristimulus values,desig-nated X,Y,Z and X10,Y10,Z10for the CIE 1931 and 1964observers,respectively,from bispectral photometric data forthe specimen.Procedures for obtaining such bispectral photo-metric data are contained in Practice E2153.1.2 Procedures for conversion of results to color spaces thatare part of the CIE system,such as CIELAB and CIELUV arecontained in Practice E308.1.3 This standard may involve hazardous materials,operations,and equipment.This standard does not purport toaddress all of the safety concerns,if any,associated with itsuse.It is the responsibility of the user of this standard toestablish appropriate safety,health,and environmental prac-tices and determine the applicability of regulatory limitationsprior to use.1.4 This international standard was developed in accor-dance with internationally recognized principles on standard-ization established in the Decision on Principles for theDevelopment of International Standards,Guides and Recom-mendations issued by the World Trade Organization TechnicalBarriers to Trade(TBT)Committee.2.Referenced Documents2.1 ASTM Standards:2E284 Terminology of AppearanceE308 Practice for Computing the Colors of Objects by Usingthe CIE SystemE2153 Practice for Obtaining Bispectral Photometric Datafor Evaluation of Fluorescent Color2.2 CIE Standards:CIE 15 Colorimetry32.3 ISO Standards:ISO 11476 Paper and BoardDetermination of CIE-Whiteness,C/2 Degrees43.Terminology3.1 DefinitionsThe definitions contained in TerminologyE284 are applicable to this practice.3.2 Definitions of Terms Specific to This Standard:3.2.1 bispectrometer,nan optical instrument equippedwith a source of irradiation,two monochromators,and adetection system,such that a specimen can be measured atindependently-controlled irradiation and viewing wavelengths.The bispectrometer is designed to allow for calibration to1This practice is under the jurisdiction of ASTM Committee E12 on Color andAppearance and is the direct responsibility of Subcommittee E12.05 on Fluores-cence.Current edition approved Nov.1,2017.Published November 2017.Originallyapproved in 2001.Last previous edition approved in 2012 as E2152 12.DOI:10.1520/E2152-12R17.2For referenced ASTM standards,visit the ASTM website,www.astm.org,orcontact ASTM Customer Service at serviceastm.org.For Annual Book of ASTMStandards volume information,refer to the standards Document Summary page onthe ASTM website.3Available from CIE(International Commission on Illumination)at www-.cie.co.at or .4Available from American National Standards Institute(ANSI),25 W.43rd St.,4th Floor,New York,NY 10036,http:/www.ansi.org.Copyright ASTM International,100 Barr Harbor Drive,PO Box C700,West Conshohocken,PA 19428-2959.United StatesThis international standard was developed in accordance with internationally recognized principles on standardization established in the Decision on Principles for theDevelopment of International Standards,Guides and Recommendations issued by the World Trade Organization Technical Barriers to Trade(TBT)Committee.1 provide quantitative determination of the bispectral radiation-transfer properties of the specimen(1).5NOTE1Typically,a reference detection system monitors the radiationincident on the specimen.This reference detection system serves tocompensate for both temporal and spectral variations in the flux incidentupon the specimen,by normalization of readings from the instrumentsemission detection system.3.2.2 diagonal elements,nelements of a bispectral matrixfor which irradiation and viewing wavelengths are equal.3.2.3 fluorescence,nthis standard uses the term“fluores-cence”as a general term,including both true fluorescence(with a luminescent decay time of less than 10-8s)andphosphorescence with a delay time short enough to be indis-tinguishable from fluorescence for the purpose of colorimetry.3.2.4 off-diagonal e