Manual

R93 VIEWING HEADS SPECIFICATIONS
AND PERFORMANCE
Plainorwatercorrectedwindowsaresupplieddependingupon
theapplication.Aplainwindowcanbeusedunderwater,how-
everitnarrowstheviewingangleasfollows:
Plain Air Water
Horizontal 50° 37°
Vertical 39° 29°
Diagonal 61° 45°
Whenawatercorrectedwindowisusedtheangleofviewin
wateristhesameastheangleofviewofaplainwindowinair.
The9mmf2.0lensfocusingrangeisfrom30mmtoinnityas
astockitem,butcloserfocusingcanbeprovidedifrequired,
subjecttoindividualapplication.
Theamountoflightthatcanbeprovidedisgovernedbya
numberoffactors,themostimportantbeingwhetherthe
cameraistobeusedinwaterorair.Inwatertheheat
generatedbythelightsisdissipatedquicklyallowinghigh
powertobeused.Inairlowerpowermayhavetobeused
asheatisdissipatedmoreslowly.
Insomeinstances,lightsonaparticularheadmaynotbe
ratedforcontinuousoperationinair.
Remotecontrolofthevariousviewingheadsincluding
rotation,HiandLolightlevels,andlightintensityisavailable
fromtheR90Mk3CameraControlUnit(CCU).Lightingpower
ofupto20wattsisalsoprovidedbytheR90Mk3CCUlighting
Module.Headsrequiringhigherpoweroutputs,useanR905
LPSexternallightingpowersupply.Interconnectingleadsto
theR90Mk3CCUenablethelightingpowertoberoutedvia
thesinglecameracable.
SPECIFICATION NOTES FOR ALL VIEWING HEADS
1.Theinformationprovidedonlightingrangesisapproximate
 onlybasedontestsmadeinadark-roomviewingscenes
 withreectivityof60%usinganR93camerattedwitha
 newvicontube.
2.A“good”pictureisdenedasonewheretheillumination
 availableissufcientforthecameratoproducea1volt
 compositevideosignalwithafullyopeniris.
3.A“usable”picturecanusuallybeobtaineddependenton
 thesceneviewedandenvironmentalfactorsetc,whenthe
 illuminationavailableisonly1/3thatrequiredtoachievea
 1voltcompositevideosignalwithafullyopeniris.
4.The“lengthwithcamera”dimensionsgivenrelatetothe
 lengthfromthetipofviewingheadtotheendofthe
 cameraconnector.
Inapplicationswherethereareseverespaceconstraints
careshouldbetakentoallowforthesizeofthecamera
cablematingconnectorandifnecessary,thebend
radiusoftheconnectingcameracable.Pleasereferto
theReesR90seriescablesandconnectorsdatasheets.