Strong Super Trouper - Page 18

OPERATION OF OPTICAL SYSTEM
 THEIRISCONTROListhefrontleverwhichprojectsthroughthetopoftheoptical
systemhousing. Whenthisleveristotheright(asviewedfromtherearoftheunit),thelargest
apertureisprovided.Smalleraperturesareselectedastheleverismovedtotheleft. 
 THESPOTSIZECONTROLHANDLEislocatedontherighthandsideoftheoptical
systemjustabovethebaserail.Avariationofspotsizesfromfulloodtosmallspotcanbeobtained
bymovingthespotsizecontrolhandlefromoneextremetotheother.Beamintensityisincreased
bythisopticalsystemwhenreducingfromoodtospot,andmaximumintensityisreachedwhenthe
spotsizecontrolhandleisintheextremeforwardposition.
 THEMAXIMUMFLOODSPOTisobtainedwithallthreebeamshapecontrollevers
totheright(towardoperatingside)forthelargestaperture,andwiththespotsizecontrolhandle
movedasfartotherearaspossible.
 SMALLERSIZEDSPOTSareprojectedasthespotsizecontrolhandleismovedfor-
ward.Mostofthespotsizesneededwillbeproducedwiththeirisinitsmaximumopenposition.
 FORA“HEADSPOT,”oranyspotsmallerthancanbeobtainedwiththespotsize
controlhandleinitsextremeforwardposition,shifttheiriscontrollevertotheleft(awayfrom
operatingside)forasmalleraperture.Theiriscontrollevershouldalwaysbereturnedtoitsex-
tremerightpositionbeforethespotsizecontrolhandleisagainmovedtoobtainlargerspots. 
 A“DIFFUSED”SPOTisprojectedbyslidingthespotsizecontrolhandlebackward
towardits“ood”settingwhileclosingtheiris(apertureselectorlevertowardleft).A“diffused”
spotisasoft-edgedspotwithlowlightintensityandisseldomrequired.
 THEMASKINGSHUTTER(chopper)leveristhemiddleleverprojectingthrough
thetopoftheopticalsystemhousing.Themaskingshutterbladesareoperatedbythislevertoshape
theprojectedspottoarectangle,stripspot,ordousing.
 THEDISENGAGEDPOSITIONofthemaskingshutterleveristotheextremeright
(towardoperatingside)andvaryingdegreesofmaskingtocompletecutoffareobtainedbymoving
thelevertotheleft(awayfromoperatingside).
 THEANGLEofthemaskingshutterbladescanbeadjustedtocompensateforthe
horizontalprojectionangle.Removethecolorboomerangandopticalsystemhousing,andloosenthe
screwsholdingeachofthemaskingshutterbladesenoughtoallowmovement.Ignitethebulband
adjusttheangleofthebottombladebytappingwithascrewdriversoitsprojectededgeliesparallel
tothefootlights.Tightenthescrew.Operatethemaskingshutterlevertoclosetheblades.Adjust
theupperbladetocloseinlinewiththebottombladeandtightenthescrew.
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