Christie CDXL-45 Manual

Christie Projektor tilbehør CDXL-45

Læs nedenfor 📖 manual på dansk for Christie CDXL-45 (4 sider) i kategorien Projektor tilbehør. Denne guide var nyttig for 14 personer og blev bedømt med 4.5 stjerner i gennemsnit af 7.5 brugere

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Christie Xenolite® lamps

and Christie Solaria™

Series projectors

Usage best practices

How to calculate the amount of light required

The basic formula to calculate this theoretical light requirement is:

Lumens (L) = Average Screen Brightness desired (average fL)

X Screen Area (sq ft)

• Givenagoodlightdistribution,the“AverageScreenBrightness”

canbeestimatedbymultiplyingthecenterbrightnessdesiredby

0.95.Generallyacceptedpracticeforthetargetcenterbrightness

is:14fLfor2Dand4.5fLfor3D(lightmeasurementtakenthrough

3Dglasses).

Afteryouhavethe“Lumens”numberyouwoulddivideitbyall

signicantsystemefciencies.Someexampleswouldbe:

•

Screen gain: 1.0 to 2.4.  Silver screens are   a 2.4. This is very important

partofthisequationandcareshouldbetakentomakesurethis

numberisaccurate.Ifthescreeninquestionisnot  new then the

overall gain should be   measuredproperly. Any degradation  

ordebrisonthescreenwillreducethescreengain.

• Port window efciency: 96%   efciency is typical for good  port glass.

• LossduetocolorcorrectionrequiredformeetingDCIcolor

specications:97%efciencyistypical.

• 3Dsystemlightefciency:thisnumbercanbeanywhere

from10%to30%efciencydependingonthe3Dsystemused.

• Othereffectslikedownangleandscreencurvedomakea

differenceforlightdistributionbuttheyonlyeffectthese

calculationsifthey excessive.are

 Calculation:Lumens Required (L) = Lumens (L) / (Screen Gain X Port

Window Efﬁciency X Color Correction Efﬁciency X 3D Efﬁciency)

 Theresulting“LumensRequired”numberyougetwouldbethe

“MINIMUMlumenrequirement”tomeetthedesiredlightlevels.

How to select the right projector/lamp combination

that will provide enough light to satisfy screen

brightness requirements

Thereshouldbeenoughbrightnessavailableevenattheendof

thelamp’slifetomeetyourspeciedcenterbrightnessrequirement.

Yourcompany’slampchangingpolicymayneedtobereviewedto

makethisdecision.

Thereisanaturalbrightnessdrop-offthatoccurswithanyXenonlamp

duringitslife.Thisbrightnesscurveistypicallysharpatthebeginning

ofthelamp’slifeanddropsslowerafterthisinitialperiod.Leaving

thelampat100%powerthroughoutitslifewouldgivethistypical

brightnesscurve:

Lamp life

Starting lamp at 100% power

Maintaining lamp at 100% power

Point at which

brightness is

unacceptable

Approximately

50% brightness

100% Rated

brightness

(lamp/projector

combination)

Brightness

Thisinitialdrop-offinbrightnessismainlyduetothere-shapingofthe

electrodesinsidethelamp.The betweentheelectrodesinsidethearc

lampwillmoveslightlyduringthisperiod.Re-aligningthelampoften

canminimizethisdrop-off.Thisre-alignmentshouldbedoneatleast

everytimetheequipmentisserviced.Themorefrequentthisisdone,

themorelightefciencycanbepreserved.

100%Ratedbrightnesswouldindicatetheuseofanewlamprunning

at100%power.

USAGE BEST RACTICES P

Optimize your Christie

digital cinema system

Christie Xenolite ®     lamps can produce remarkable brightness

and color consistency with excellent resistance to icker,       

ignition difculty and explosion. With this superior performance       

comes great economy. Here some usage guidelines    are   

that can be applied to get optimum performance from the         

Christie Xenolite lamp and Christie Solaria     ™  Series projector

combination. If you need technical support to help you        

with this, please do not hesitate to contact Christie        

technical support.

Produkt Specifikationer

Mærke:	Christie
Kategori:	Projektor tilbehør
Model:	CDXL-45

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