Oriel 66180 User manual

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66180-M
INSTRUMENTS
250LongBeachBoulevard
Stratford, GT06497-0872
Phone:[phone]
Fax:[phone]
E-MAIL 73163.1321 @compuserve.com
QUARTZTUNGSTENHALOGEN
LAMPHOUSINGS
MODELS66180THROUGH66184
Pleasereadtheseinstructionscompletelybeforeoperatingthisequipment.Iftherearean/questionsorproblems
regardingtheuseofthisequipment,pleasecontact:ORIELINSTRUMENTS- or- therepresentativefromwhomthis
equipmentwaspurchased.
L.O.T.- ORIELS.A.
9AvenueDeLaponie
Z.A.DeCourtaboeuf
91951LesUlisCedex
France
Phone:[phone]
Fax:[phone]
L.O.T.- ORIELGmbH
ImTiefenSee58
D-64293Darmstadt
Germany
Phone:[phone]
Fax:[phone]
L.O.T.- ORIELLtd.
1MoleBusinessPark
Leatherhead
SurreyKT227AU
England
Phone:[phone]
Fax:[phone]
LO.T.- ORIELITALIA
VialeDeiMille,20
20129Milano
Italy
Phone:[phone]
Fax:[phone]
FAIRLIGHTBV
MemberL.O.T.- OrielGroup
Marshallweg45
3068JNRotterdam
Netherlands
Phone:[phone]
Fax:[phone]
L.O.T.- ORIELSUISSE
Moulin-du-Choc
1122Romanel-Sur-Morges
Switzerland
Phone:[phone]
Fax:[phone]
10/1/90

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TABLEOFCONTENTS
iiNTRODUCTiON3
liSUMMARYOFHAZARDS4
IMRADIATION4
11.2ELECTRICALSHOCK4
11.3HEAT4
IIIGENERALDESCRIPTION5
111.1LAMPANDREFLECTORADJUSTMENTS5
111.2LAMPCOOLING5
111.3SAFETYFEATURES5
111.4MOUNTING5
IVOPERATINGINSTRUCTIONS9
IV.1LAMPINSTALLATIONANDINITIALOPERATION9
IV.2ADJUSTMENTSPRIORTOOPERATION10
IV.3ADJUSTMENTSDURINGOPERATION11
VLAMPHOUSINGOPTICS12
V.ICOLLIMATEDBEAMS12
V.2IMAGINGTHEFILAMENT14
V.3REALLENSES14
V.3aSphericalAberration14
V.3bChromaticAberration16
V.4HOWDOYOUPOSITIONTHECONDENSERTO
GETACOLLIMATEDBEAM?17
WARRANTY
RETURNS

66180-M
QuartzTungstenHalogen
LampHousings
INTRODUCTION
ThismanualcoversthefollowingOriel10to250WQuartzTungstenHalogenLamp
Housings:
66180LampHousingwithnocondenser
66181LampHousingwith F/0.85 condenser
66182LampHousingwithF/1.5condenser
66183LampHousingwithglass/fusedsilicaF/0.7condenser
66184LampHousingwithF/1condenser
Thehousingshavethesamebasicdesignanddifferinthecondensinglensassembly.
Withtheappropriatesocketadapter you caninterchangebetween10,20,50,100,
and250WQuartzTungstenHalogen Lamps. Table 1 liststheappropriatesocket
adapter,transformer,andpowersupplyforthelamps.
Table 1 AppropriateSocketAdapterandPowerSourceforOrielLampHousings
Lamp
Power
(W)
10
20
50Shortfilament
50Longfilament
100
250
Model
No.
6318
6319
6332
6337
6333
6334
Socket
Adapter
66149
66149
66156
66156
66156
66156
Constant
Voltage
Transfomier
6394
6394
6393
6393
6393
6395
DCPowerSupplies
Stabilized
DC
Supply
68735
68735
68735
68735
68735
Radiometric
Supply
68830
68830
68830
68830
68830
68830

66180-M
QuartzTungstenHalogen
LampHousings
II
SUMMARYOFHAZARDS
There are. threemajorhazardsintheoperationofsystemsemployingtheselamphous-
ings. Theyare:
Radiation
ElectricalShock
Heat
U.lRADIATION
TheUVradiationoftheselampscanpermanentlydamagethecornea,lens,and
retinaoftheeye,evencausingblindness.Thisdamagemaynot be immediately
apparent.Normalblinkreactiontovisiblelightmaynotbeadequateprotection,
andabeamofinvisibleUVorNIR(producedbyspectralfiltering)canbemost
dangerousastheblinkresponseisnotinduced.
Recommendations
1Neverlookdirectlyintotheoutputbeamofahousingwhenoperatinga lamp.
2Neverlookataspecular(mirror)reflectionofthe beam, evenforshortperiods
oftime.
3Usetheinterlocksystemtopreventaccessto a workinglamp.
4AlwayswearUVsafetyeyewearorfacemask,andprotectiveclothingfor
exposedareasof skin.
n.2ELECTRICALSHOCK
Linevoltageissuppliedtothelamphousingtopowerthefanandelapsedtimein-
dicator.Thislinevoltagewillstillbepresentevenwhenthepowersupplyisdis-
connectedfromthehousing.
Recommendations
1Keeppersonnelclearofallexposedterminals.
2Beforerelampingorworkingonthesystem,disconnecttheinputpowertothe
lamphousing.
n.3HEAT
Theselampsbecomeveryhotduringoperation,andremainveryhotforupto10
minutesafterbeingshutoff.
Recommendations
1Donottouchthelampwithyourbarehandsforatleast10minutesafterbeing
shutoff.

66180-M
QuartzTungstenHalogen
LampHousings
III
GENERALDESCRIPTION
Theselamphousingsholdourlowtomediumpower QTH lamps. Theyhavea built-in
fantokeepthelampsattheproperoperatingtemperature.Thefanneednotbe oper-
atedforthelow(10and20W)powerlamps.
m.lLAMPANDREFLECTORADJUSTMENTS
Thesehousingshaveexternaladjustmentknobstoindependentlypositionthe
lampandrearreflector.Horizontalandverticallampcontrolspositionthefilament
ofareplacement lamp. Qpticalcomponentsoutsidethehousingdonothaveto
berepositioned.Reflectorcontrolsprovidetiltandfocusadjustment.SeeFig.1
onthefollowingpageforlocation.
in.2LAMPCOOLING
Thesehousingsuseforcedair cooling. A sidemountedfanmaintainsthecorrect
operatingtemperaturefortheQTHlampsinanormallaboratoryenvironment.
Overheating,duetoblockingofthecoolingventsor an inoperative fan, activates
athermostatinterlock.
in.3SAFETYFEATURES
Thesehousingscomeequippedwithsafetyinterlocks.(See Fig. 2onpage7.)
Whenusedwiththe68830Supply,thelamppowerisautomaticallyshutoffifthe
housingdoorisopenedorthehousingoverheats.Ifyouusethe68735DC
PowerSupply,oraConstantVoltageTransformer,werecommendyoudevelop
yourowninterlocksystemforyoursafety.
in.4MOUNTING
TheseQTHHousingscomewithfourlevelingfeetforuseasfreestandingunits.
Thefeetprovide0.63inch(16mm)heightadjustment.(See Fig. 3 onpage8.)
Fordirectmountingtometricor inch opticaltables,removethefeet and usethe
slots. Theopticalaxisisthen4.0inches(102mm)abovethetable.Theslots
allow1.0inch(25mm)horizontaladjustment.

66180-M
QuartzTungstenHalogen
LampHousings
LAMPVERTICAL
POSITIONADJUST
LAMPHORIZONTAL
POSITIONADJUST
METRICMOUNTING
SL0TS(4)
INTERLOCKED
LAMPACCESS
DOOR
REFLECTORPINSAND
ADJUSTKNOBS
INCHMOUNTING
SL0TS(4)
Fig. 1 LampandReflectoradjustments.

66180-M
QuartzTungstenHalogen
LampHousings
LAMP
CABLES
INTERLOCK
Fig. 2 Safetyinterlock and electricalsockets.

66180-M
QuartzTungstenHalogen
LampHousings
4_ ADJUSTABLE
0.5-1.13
(13-29)
Fig. 3 DimensionalDiagram.

66180-M
QuartzTungstenHalogen
LampHousings
IV
OPERATINGINSTRUCTIONS
rv.lLAMPINSTALLATIONANDINITIALOPERATION
1Unscrewtheknurledthumbscrewsonthesideofthehousingtoremovetheac-
cess door.
2Mount the lamp in theappropriatesocketadapter(SeeTable 1 onpage3)bycare-
fullylining up thetwopinsof thelampwith thesocket and pushinginslowly
withoutexcessiverockingback and forth. Theselampsareverydelicate;
theyshouldnotbesubjectedtoexcessivestrainortheymaybreak.
Tochangetheorientationofthelampfromverticaltohorizontalor vice-versa, re-
movethetwosocketretainingscrewsandmovethesockettotheothertwoholes
ontheplate.Thesocketcanalsobemovedbackandforthontheslotstocom-
pensateforthedifferenceinlamp sizes. See Fig. 4beiow.
SOCKET
ADAPTER
LAMP
MOUNTED
VERTICALLY
SOCKET
ADAPTER
LAMP
MOUNTED
HORIZONTALLY
Fig. 4 Changingtheorientationofa QTH lamp. Thehousingontheleftshows
thelampmountedvertically;thehousingontherightshowsthelamp
mountedhorizontally.

66180-M
QuartzTungstenHalogen
LampHousings
3Insertthelampsocketadapterintothebottommountingblock,andscrewthe
danglinglampleadtothetopofthelampsocketadapter.
4Slidethelampupordownsothefilamentliesapproximatelyinthecenterofthe
mirror. Ifnecessary,removeandadjustsocketasinStep2.
5Cleantheenvelopewithalcoholandlint-freetissueafteritisinstalled.Finger-
printsleftonthelampmaycauseIttobreakwhenIlt.
6Replacetheaccessdoor on thelamphousing.
7Connecttheblowerlinecordtoasourceof110V50/60Hz(220V on export
units).
8Connectthelampleadstotheoutputterminalsofthelamppower supply. Read
thePowerSupplyInstructionManualbeforeoperation.
9Connectthesafetyinteriockcabletothepowersupply.
IV.2ADJUSTMENTSPRIORTOOPERATION
1Beforeturningthelamp on, roughlyadjustitspositionwiththehorizontaland
verticaladjustmentscrews.Adjustthelampsothefilamentliesapproxi-
matelyinthecenterofthecondensinglens.Thiscanbeseenthroughthe
lensifthefocusinglever on thelensisfullback.
2Adjustthemirrorimagesoitliesalongsidethelampasviewedfromthefront.
(Ifthefrontviewis blocked, tightenthehorizontalmirroradjustmentabout2
or 3 turnstoassurethatthefilamentisdisplacedtotheside).
10

66180-M
QuartzTungstenHalogen
LampHousings
IV.3ADJUSTMENTSDURINGOPERATION
1Focuswiththecondensinglens,soanimageofthefilamentappearson a wall
orscreen.
2Rotatethemirrorthumbscrewsuntilanimageisinfocus.Focusthemirrorby
rotatingallthreescrewsinthesamedirectionconcurrently(thistranslates
themirrorbackorforth).
3Placethemirrorimageoverthelamporalongsideasdesired.
4Adjustthelamppositiontoplaceimagesinthecenteroftheilluminated field.
5Focusthecondensinglensasdesired.
ForAdditionalRangeofAdjustment:
1Removethecondensinglensassemblyhandle(takecaretorecordtheorderof
assemblyofit'sparts).
2By hand, slidetheinnerlensbarrelfonwardorbackwarduntilanothertapped
holeappearsinthespiralslot.
3Reassemblethehandleintothisnewhole.
11

66180-M
QuartzTungstenHalogen
LampHousings
V
LAMPHOUSINGOPTICS
Fourtypesofcondenserlensesareavailableonthese l.amp Housings.Youcan
checkthelenstypeonyourhousingfromthelisting:
66180Nocondenser
66181 F/0.85 condenser
66182F/1.5condenser
66183F/0.7glass/fusedsilicacondenser
66184F/1condenser
Thelensesweredesignedforefficientcollectionoflightfromthefilament.Inorderto
getthebestperformancefromyourLampHousing,wefirstreviewsomeaspectsof
lightcollectionandthendescribehowtosetthelensposition.
Bymovingthefocusinglever you canmovethepositionofthe condenserlensesto
produceadivergingbeam,"collimatedbeam"ortore-imagethefilament.Thelenses
inthesehousingsaredesignedforcollimationratherthanimaging.Thelensshape
andorientationareselectedtominimizelensinduceddistortions(aberration)whenthe
lensesareclosetothepositionwhichproducesacollimatedbeam(thecollimatingpo-
sition).Whenyouusethemfor imaging, therearetwopenalties;lensaberrationsin-
crease*andlightcollectionis reduced. For imaging, thelensismovedfurtherfromthe
filament,andsogatherslessofthelightemittedbythefilamentwithinitsaperture.
ThelensoperatesatahigherF/#.
*SeeVolume 111 foracomprehensivediscussiononaberrations.
If you needtoimagethefilamentclosetotheLampHousing,orequivalently,produce
asmallimageofthefilament,thenitismoreefficienttousethecondenserinthe colli-
matingpositionanduseasecondaryfocusinglenstocreatetheimage.
Tosimplifythediscussion,wefirstdescribetheoperationof an ideallensandthen
someofthemajorresultsofaberrations.
V.lCOLLIMATEDBEAMS
Theusualconceptofacollimatedbeamisa parallelcylinderoflighLIftheinten-
sityisthesameanywhereacrossasectionofthecylinder,thebeamisuniform.
Unfortunatelythereisnosourceofa uniform,perfectlycollimatedbeam.
Evenexpensivelasersourceshavesomeresidualdivergence,inthelimitgov-
ernedbythelawsofdiffraction,andtheyusuallyhavenonuniformthoughsome-
timesknownintensitydistributions.
12

66180-M
QuartzTungstenHalogen
LampHousings
QTHSourceswithanidealcondenserlensinthecollimatingpositionproduce
beamswhichdependonthefilamentsizeandintensitydistribution.
Apinholesourceatthefocusofanideallensproducesa beamwhichiscloseto
theidealcollimatedbeam.InFig.5 weshowa secondpinholesourcea distance
"d" fromthefirst.
d/F
Fig. 5 Formanysources,thedivergenceinoneplaneisnotthesameasthat
intheorthogonalplane.
Thebeamfromthesecondpinholewillalsobecollimatedbutatananglearctan
(d/F)withthefirst.Anyextendedsourcecanbethoughtofasawholesetoftouching
pinholes.Thebeamafterthelensisthesumofallthebeamsfromallthepinholes.It
willcontainrayswithanglesuptoD/FwhereD isthelargestdimensionofthe
source.Thebeamwillhavea divergencewhichdependsonthesumofthelight
fromallthepointsonthesource.Obviouslythisdivergencewilldependonthesize
ofthesourceandtheintensityofthevarious"pinholes"orpointsonthesource.
13

66180-M
QuartzTungstenHalogen
LampHousings
V.2IMAGINGTHEFILAMENT
Youcanreimagethefilamentbypositioningthecondenserfurtherfromthelamp,
usingthefocusing lever. VolumeIIIdescribesimagingandprovidestheformulae.
Asthecondenserlensismovedout,theimagemovesinandbecomessmaller.
Asalreadyindicated,thelenscollectslesslightasitismovedawayfromthefila-
ment.Additionally,theconvergenceangleofthebeamgoesupastheimagebe-
comessmaller.Thisisnotusuallyimportantforirradianceofa surface, butcan
besignificantiftheimageisontheslitofamonochromator,optical fiber, orother
opticalsystemwithlimitedacceptance angle. Wenormallyuse a secondaryfo-
cusinglenstomaximizethelightthroughaslitorintoafiberoptic.
V.SREALLENSES
Thecondenserlensesareintendedforefficientlight collection. Theyoperateat
lowF/#s.Asaresultthesingleelement F/0.85 andF/1lensessuffer from severe
aberrations,particulariysphericalaberration.ThedoubletF/1.5lensissomewhat
better, whilethe AspheralDS™ arealmostfreefromsphericalaberration.Notethat
allthelensesperformbestwhilecollimatingthelightfromthesource.
v.3aSphericalAberration
Thisaberrationresultsfromthefactthattheideallens,theaberrationfree
lens, isnotsphericalin shape. Withtheexceptionoftheaspheric(F/0.85)
condenser,thesecondenser lenses, likemost lenses, havespherical sur-
faceshapesforeconomicmanufacturing,in general, sphericalaberrationis
decreasedbydividingtherefraction(light bending), asequallyaspossible
betweenasmanysurfacesaspossible.Thelensshapes(plano-convexfor
thefusedsilicasinglets)ofourcondensersandorientationsminimizespheri-
calaberrationforthetypeofcondenserandatthecollimating position. The
F/0.7Aspherab™multi-elementlensassemblypracticallyeliminatesthisab-
errationbybalancingtheeffectsbetweenlenses.
Considerthesimplepianoconvexlenscollimatinglightfromanidealpoint
source.Withthepianosurfacetowardsthepointsourceandthepoint
sourceatthe(paraxial)focusthemarginalraysconvergewhiletheparaxial
raysarecollimated.(Fig.6)Thisisduetosphericalaberration.Fortheideal,
nonsphericallens shape, theparaxialandmaginalraysareallcollimated.If
thesourceislocatedabout1/4f insidethefocus,theparaxialraysdiverge
slightlyandthemarginalraysarealmost collimated. Thisisoftenthe opti-
mumcompromiseforasingleelementcollimatinglens(andhastheadded
advantageofcollectingmorelight from thesource).
14

66180-M
QuartzTungstenHalogen
LampHousings
SPHERICALABERRATION MARGINALRAYS
CONVERGE
PARAXIALRAYS
COLLIMATED
MARGINALRAYS
CONVERGEWEAKLY
-- COLLIMATED
-PARAXIALRAYS
DIVERGEWEAKLY
Fig. 6 Themarginalraysandtheparaxialraysarecollimatedwhen the
pointsource is attheparaxialfocus,andthepianosurface of the
lensfacesthepointsource.
Thelensadjustment on theselamphousingsallowsthelenstobemoved
closer to thesourcethantheparaxialfocus.Youcanempiricallyfindthe
bestpositionforyoursystem.
TheF/0.7 /\spherab™condensing lensescombinenegligiblesphericalaberra-
tionandlowF/#, and shouldbeusedatfocusfor critical collimatingapplications.
15