1、A Referencenumber ISO113151:1997 (E) INTERNATIONAL STANDARD ISO 113151 Firstedition 19971115 PhotographyProjectioninindoor rooms Part1: Screenilluminationtestforstillprojectors PhotographieProjectionensalles Partie1:Essaideluminositdelcranpourpro jecteursfixesISO113151:1997(E) ISO1997 Allrightsreser
2、ved.Unlessotherwisespecified,nopartofthispublicationmaybereproduced orutilizedinanyformorbyanymeans,electronicormechanical,includingphotocopyingand microfilm,withoutpermissioninwritingfromthepublisher. InternationalOrganizationforStandardization Casepostale56 CH1211Genve20 Switzerland Internet centr
3、aliso.ch X.400 c=ch;a=400net;p=iso;o=isocs;s=central PrintedinSwitzerland ii Foreword ISO(theInternationalOrganizationforStandardization)isaworldwide federationofnationalstandardsbodies(ISOmemberbodies).Theworkof preparingInternationalStandardsisnormallycarriedoutthroughISO technicalcommittees.Eachm
4、emberbodyinterestedinasubjectforwhich atechnicalcommitteehasbeenestablishedhastherighttoberepresented onthatcommittee.Internationalorganizations,governmentalandnon governmental,inliaisonwithISO,alsotakepartinthework.ISO collaboratescloselywiththeInternationalElectrotechnicalCommission (IEC)onallmatt
5、ersofelectrotechnicalstandardization. DraftInternationalStandardsadoptedbythetechnicalcommitteesare circulatedtothememberbodiesforvoting.PublicationasanInternational Standardrequiresapprovalbyatleast75%ofthememberbodiescasting avote. InternationalStandardISO113151waspreparedbyTechnicalCommittee ISO/
6、TC42, Photography. ItcancelsandreplacesISO8341:1989,ofwhichitconstitutesatechnical revision. ISO 11315consistsofthefollowingparts,underthegeneraltitle PhotographyProjectioninindoorrooms : Part1:Screenilluminationtestforstillprojectors Part2:Screenluminancetestforstillandvideoprojection Part3:Project
7、ionreflectingscreens Part 4:ReflectingprojectionscreensClassificationand measurementofreflectedscreenluminancelevelsandsound attenuation AnnexesAandBofthispartofISO11315areforinformationonly.INTERNATIONALSTANDARD ISO ISO113151:1997(E) 1 PhotographyProjectioninindoorrooms Part1: Screenilluminationtes
8、tforstillprojectors 1Scope ThispartofISO11315specifiesalaboratorymeasuringmethodfordeterminingtheutilisedflux oftheprojectorandtheuniformityofscreenilluminanceindarkenedprojectionroomsforall typesofpurelyopticalstillprojection. Astandardizeduniformlightmeasuringsystemallowscomparisonofscreenillumina
9、ncevalues fordifferentprojectionsystemsusedalternatelyinpracticaluse. 2Normativereferences Thefollowingstandardscontainprovisionswhich,throughreferenceinthistext,constitute provisionsofthispartofISO11315.Atthetimeofpublication,theeditionsindicatedwerevalid. Allstandardsaresubjecttorevision,andpartie
10、stoagreementsbasedonthispartof ISO11315areencouragedtoinvestigatethepossibilityofapplyingthemostrecenteditionsof thestandardsindicatedbelow.MembersofIECandISOmaintainregistersofcurrentlyvalid InternationalStandards. CIENo.15.2:1986, Colorimetry(2ndedition). CIENo.17.4:1987, InternationalLightingVoca
11、bulary SameeditionasIEC50(845): International ElectrotechnicalVocabulary, Chapter845: Lighting. CIENo.18.2:1983, TheBasisofPhysicalPhotometry . CIENo.69:1987, MethodsofCharacterizingIlluminanceMetersandLuminanceMeters Performance,CharacteristicsandSpecifications .ISO113151:1997(E) ISO 2 3Definitions
12、 ForthepurposesofthispartofISO11315,thefollowingdefinitionsapply. 3.1illumination: Theapplicationofvisibleradiation(light)toanobject. CIEPubl.No.17 3.2luminousflux;lightoutput: Thequantityderivedfromradiantfluxbyevaluatingthe radiationaccordingtoitsactionuponaselectivereceptor,thespectralsensitivity
13、ofwhichis definedbythestandardspectralluminousefficiencies. CIEPubl.No.17 3.3utilisedflux: Theluminousfluxreceivedononesideofthereferencesurface. CIEPubl.No.17 3.4stillprojection: Allprojectionmethodswithoneormoreprojectorsforslides,overhead projectiontransparencies,episcopicpicturesforprojectionand
14、transparentLCDs. 3.5darkroomprojection: Anindoorroomwithoutanyadditionalroomlighting,exceptsafety lightsforsteps,emergencyexits,etc. 3.6uniformityratio, g 2 :Theratioofthelowestmeasuredilluminance/luminancetothehighest measuredilluminance/luminance,e.g. E min /E max (x100in%). CIEPubl.No.17 4Prepara
15、tionforphotometricmeasurements 4.1Preconditioning Beforethecommencementofanytest,theprojectorshallbeconditionedbybeingkeptunder theenvironmentalconditionsofthetestinglaboratoryforatleast8h. 4.2Projectorsetup(lightpath) Whilemakingthetests,theprojectorshallbeoperatedwithitsnormalcomponents(e.g.light
16、source,heatfilter,condenser,lens),butwithoutprojectionmaterial(i.e.slides,films,etc.inthe pictureareaorapertureplate). 4.3Voltage,currentandfrequencies 4.3.1 Theprojectorshallbeoperatedfromanadjustablepowersupplyadjustedtowithin 0,5%oftheratedvoltageoftheprojector. Whileadjustingthesupplyfortungsten
17、lightingornoncontrollabledischargelamps,thevoltage shallbemeasuredatthesupplysockettowhichtherecommendedpowersupplycordofthe projectorisconnected.Thefrequencyofthepowersupplyshallmatchthemanufacturersrating fortheprojector.ISO ISO113151:1997(E) 3 Forcontrollablexenondischargelamps,thecurrentshallbet
18、henominalvalue(accordingto thedataofthelampmanufacturer)0,5%.Inthecaseofxenondischargelampswitha relativelyvastluminousflux,themeasurementshallbemadethroughahighlightfilm (approximately D =0,10,15where Disthefilmthickness,inmillimetres)andwithhalfofthe nominalcurrent.Thevalueofthenominalluminousflux
19、shallbecalculatedfromtheabove parameters. 4.3.2 Iftheprojector(equippedwithtungstenlightingornoncontrollabledischargelamps)is suitableforuseatdifferentvoltagesand/orfrequencies,themeasurementsfordeterminingthe luminousfluxshallbemadeeitherateachadjustablevoltage0,5%anditsrelatedfrequency, oratleasta
20、taselectionofcharacteristicvoltagesandfrequencies.Whenselectingthevoltages andfrequencies,considerationshallbegiventothemainusageoftheprojectorinpractice,and theconditionsunderwhichextremedifferencesofthetestresultsmightbeexpected.The measurementsfordeterminingtheuniformityofscreenilluminancecanbema
21、deatanyposition ofthevoltageselectorwiththerespectivelinevoltage0,5%andtherelatedfrequency. 4.3.3 Fordeterminingtheinputvoltageofthetungstenlamp,thevoltageatthelampholder shallbemeasuredwiththelampoperating,andafterthetimespecifiedin4.8haselapsed. (Whenalampisprovidedbyaswitchingpowersupply,useatrue
22、r.m.svoltmeter.) 4.4Lampadjustment Thelampshallbeadjustedintheprojectoraccordingtotheoperatinginstructions. 4.5Cleanliness Theopticalelementsoftheprojectorshallbefreefromdustandothercontamination. 4.6Ambienttemperature Theambienttemperatureinthetestinglaboratoryshallbe23C2C. 4.7Projectoralignment Th
23、eprojectorshallbepositionedsothattheprojectionofitsopticalaxisisnormaltotheplane ofthescreen.(SeeannexA,note.) 4.8Stabilization Ifthelampisfedviaatransformeroraballastresistance,thelightmeasurementsshallbe started,attheearliest,20minafterhavingswitchedonthelamp,runningundernormaltest conditions.Ifth
24、elampisfeddirectlybythemainsvoltage,themeasurementscanbestarted after5min. 4.9Ambientlight Theilluminationofthescreenduetoambientlightshouldnotexceed1%ofthescreen illuminanceduetoilluminationprojectedthroughtheprojectorlensduringthemeasurement. Forthereductionofstraylight,theuseofablackscreenisrecom
25、mended.ISO113151:1997(E) ISO 4 5Lightmeasuringequipment 5.1General Thephotometricpropertiesofprojectorsaredescribedbytheluminousflux(see6.4.2)andby itsuniformityontheprojectionscreen(seeclause7). 5.2Photometer Thephotometerusedshallhaveaspectralresponsecharacteristiccorrespondingtothe CIE1931Standar
26、dColorimetricObserverasspecifiedinCIENo.15.2:1986(E1.3.1).(This responsecorrelateswiththecoloursensationofthehumaneye.) Aphysicalreceivershallassesstheilluminanceinaccordancewiththespectralluminous efficiencyforphotopicvision V (l)asspecifiedinIEC50(845):1987,term8450122or CIEPubl.No. 18.Theillumina
27、nceshallcomplywithclassBasspecifiedinCIEPubl.No.69. Theeffectivediametersofthephotoelectricalcomponentshallbespecifiedinthetestresults (seeclause8). 5.3Useoflightmeter Thelightsensingelementofthemetershallbepositionedattheplaneofthescreenwitha toleranceof+ 20mmandparalleltoitsothatitmeasuresdirectly
28、theincidentprojectedlight. 6Measurementofusefulluminousflux(lightoutput) 6.1 Theusefulluminousfluxiscalculatedfromtheaveragescreenilluminanceandthe respectiveprojectionarea. 6.2 Theeffectiveprojectionarea(seefigure1) A = wx h where Aistheeffectiveprojectionarea,insquaremetres; wistheeffectiveproject
29、ionwidth,inmetres; histheeffectiveprojectionheight,inmetres. Ashallbeconfinedbyusingasuitablemaskpositionedinthepictureareaandbroughttofocus (e.g.anemptyslidemount). 6.3 Fordeterminingtheaveragescreenilluminance,theprojectedlightshallbemeasuredat ninepoints(E 1 E 2 E 3 E 4 E 5 E 6 E 7 E 8 E 9 )onthe
30、screenasshowninfigure1. Donotdeducttheunlightedcornerareas(e.g.ofanoverheadprojector)fromthecalculated area.ISO ISO113151:1997(E) 5 E E x = = x 1 9 9 Key w Effectiveprojectionwidth h Effectiveprojectionheight Figure1Screenilluminancemeasuringpointsonthescreen (fortheselectionoftestpoints,see7.3) 6.4
31、Calculatingtheusefulluminousflux 6.4.1 Thearithmeticalaverageoftheninereadings( E x )ofscreenilluminanceisgivenby E ,in lux: 6.4.2 Todeterminetheeffectiveluminousfluxofaprojector,theilluminationismeasuredata numberofspecifiedpositionsonthescreen.Ameanvalue(usefulluminousflux)iscalculated, whichisthe
32、nmultipliedbytheusedareaofthescreen,insquaremetres. Theutilisedluminousflux Foftheprojectorisgiveninlumens: F =EA where Aistheeffectiveprojectionareaontheprojectionscreen wx h(see6.2). 6.4.3 Theeffectiveprojectionarea Ashallbeintherangefrom1m 2 to2m 2 .Inorderto determinetheprojectionareausedforthet
33、est,thenormalusageforwhichtheprojectoris designedshallbenoted.ISO113151:1997(E) ISO 6 7Uniformityofscreenilluminance Bycombiningthescreenilluminanceatvariouspositions,theuniformityofitsdistributiononthe screenisestablishedbytheuniformityratio g 2 . NOTEThehighestmeasuredilluminance E max isnormallym
34、easuredatpointE 5 (seefigure1). 7.1Determiningtheuniformityofscreenilluminance Fordeterminingtheuniformityofscreenilluminance,intensitiesofilluminanceatdifferent cornerpointsaresetinproportiontotheintensityoftheilluminanceatthecentreofthescreen. 7.2Alternativetypesofdifferentmeasuringpositions Three
35、differenttypesofmeasuringpointsaredefined(seefigure1)andanyorallofthemcan beused: a)type1: cornerpoints E 1 E 3 E 7 E 9 at wh 6 , 10 (forallkindsofprojectors); b)type2: cornerpoints E 10 E 11 E 12 E 13 at wh 10 , 10 (foralltypesofslideprojectors); c)type3: cornerpoints E 14 E 15 E 16 E 17 at wh 20 ,
36、 20 (foralltypesofslideprojectors).ISO ISO113151:1997(E) 7 7.3Calculatingtheuniformityofscreenilluminance Fromeachtypeofcornerpoint,thepointwiththelowestintensityofilluminanceischosen.The illuminancevalueatthispointiscalculatedasaproportionoftheilluminancevalueatthecentre point( E 5 ). Theresultingv
37、alues, g 26 or g 210 or g 220 ,serveasindicationsoftheuniformityofscreen illuminance: Measuringposition a)type1: g 26 = E E min (1, 3, 7, 9) 5 100 % (foralltypesofprojectors); b)type2: g 210 = E E min (10, , 13) 5 100 % 11 12 , (foralltypesofslideprojectors); c)type3: g 220 = E E min (14, 17) 5 100
38、% 15, 16, (foralltypesofslideprojectors). 8Testresults GiveresultsofthetestsaccordingtothispartofISO11315intheformoftheexamplein table1. Table1ReportoftestsresultsExampleofpresentationofresultsforaslideprojector Testsubject Projectormanufacturer/modelname/number/serial number Ratedvoltage 100V,120V,
39、230V,240V Frequency 50Hzor60Hz Nominallamp 24V/250WHalogen Manufacturerandtype numberoflamp MNOcomp.TypeNo.1234 Lens (name), f=3,5/85mm Pictureapertureformat nominal24mmx36mm actual22,5mmx34,3mm Voltageselector position V Projectorinput VHz Lampinput V Luminousflux lm 100 10050 22,95 710 120 12060 2
40、3,00 720 220/230 23050 24,00 810 240 24060 23,05 730 Uniformityofscreenilluminance g 26 =75% g 210 =68% g 220 =62%ISO113151:1997(E) ISO 8 AnnexA (informative) Measuringmethods Itisbecomingincreasinglycommontodaytouseseveralalternativetypesofprojectionduringa singleshow.Thisfactmakesitnecessarytosetu
41、pastandardizedtechniqueformeasuring lightonascreenforall projectionmethods,inordertoreachdefinedprojectionconditions duringapresentationwithdifferenttypesofprojectors. AllprojectionmethodsincludedinthispartofISO11315involveopticalprojection,i.e.the projectionofanimageontoaprojectionscreen byopticalm
42、eans.Electronicprojectionmethods whichprojectimagesontomonitortypescreens (e.g.TVmonitors,TVreceivers,computers, etc.)donotfallwithinthescopeofthispartofISO11315.Furthermore,holographicsystems arenotwithinthescopeofthispartofISO11315. Thefinalpurposeofeachprojectionsystemistheviewingofprojectedimages. Aprojectionsystemconsistsof
