Designation:E1455−03(Reapproved2010)StandardPracticeforObtainingColorimetricDatafromaVisualDisplayUnitUsingTristimulusColorimeters1ThisstandardisissuedunderthefixeddesignationE1455;thenumberimmediatelyfollowingthedesignationindicatestheyearoforiginaladoptionor,inthecaseofrevision,theyearoflastrevision.Anumberinparenthesesindicatestheyearoflastreapproval.Asuperscriptepsilon(´)indicatesaneditorialchangesincethelastrevisionorreapproval.INTRODUCTIONThispracticeprovidesdirectionsforcorrectingtheresultsobtainedwithtristimuluscolorimeterswhenmeasuringthetristimulusvaluesorchromaticitycoordinatesofcoloreddisplays.TristimuluscolorimetersapproximatetheCIEcolormatchingfunctionsx¯(l),y¯(l),z¯(l)tomakethesemeasure-ments.Theerrorsgeneratedinmeasuringcolorsonadisplaymaybeminimizedusingthispractice.1.Scope1.1Thispracticeisintendedasanaidforimprovingtheaccuracyofcolorimetricmeasurementsmadewithtristimuluscolorimetersonvisualdisplayunits,suchascathoderaytubes(CRTs)andself-luminousflat-paneldisplays.Itexplainsausefulstepintheanalysisofcolorimetricdatathattakesadvantageofthefactthatlightfromsuchdisplaysconsistsofanadditivemixtureofthreeprimarycoloredlights.However,itisnotacompletespecificationofhowsuchmeasurementsshouldbemade.1.2Thispracticeislimitedtodisplaydevicesandcolori-metricinstrumentsthatmeetlinearitycriteriaasdefinedinthepractice.Itisnotconcernedwitheffectsthatmightcausemeasurementbiassuchastemporalorgeometricdifferencesbetweentheinstrumentbeingoptimizedandtheinstrumentusedforreference.1.3Thisstandarddoesnotpurporttoaddressallofthesafetyconcerns,ifany,associatedwithitsuse.Itistheresponsibilityoftheuserofthisstandardtoestablishappro-priatesafetyandhealthpracticesanddeterminetheapplica-bilityofregulatorylimitationspriortouse.2.ReferencedDocuments2.1ASTMStandards:2E284TerminologyofAppearanceE1336TestMethodforObtainingColorimetricDataFromaVisualDisplayUnitbySpectroradiometryE1341PracticeforObtainingSpectroradiometricDatafromRadiantSourcesforColorimetry2.2ISO/CIEStandard:CI...
