International Standard 6035 INTERNATIONAL ORGANIZATION FOR STANDARDIZATION MEWYHAPO~HAR OPrAHM3Al W fl0 CTAH~APTM3AlWl~RGANISATlON INTERNATIONALE DE NORMALISATION Cinematography Viewing conditions for[.]
Trang 1INT R ATIO AL O G NIZATIO FO STAD R IZATIO MEWY A ~HR O rAM3AlW fl0 CTA ~ATM3AlWl~R AISTlO INT RATIO AL DE N RMALISTIO
Des ptor s : cinematograh , motion pictur e fim, fim sldes, telev ision Sy stems, sc r een (display) dimen ion, spcification
Pr i e ba sed on 3 pges
Trang 2ISO (h Inter natio al Or ganizatio f or Stan ar dizatio ) is a w or l w id f ed r atio of
t he member bo ie f or apr ov al bef ore th ir aceptan e as Inter natio al Stan ar ds by
t he ISO Co n i
Au tala
Fr an e
Au tia
Ger man , F R
Belgium
Ir elan
Ca nada
I taly
China
Ja pan
Romania
Sp in
Sw ed n
Sw itz r lan
U A
0
Printed in S itzer lan
Trang 3Cinematogr aphy -
na tio
lt als spe ifie th relativ e siz of t he s r rou d a nd Scre n, an
t he lev el of ambie t iuminatio t o per mit critical ev aluatio of
c lo r blan e a nd c ntr ast of ims inte d d for telev isio u e
c n itio s f or rev iew ro ms f or lar ge au ie c s
t hea tr es
Colo r fims a nd sld s f or tele-
that of a blac bo y of n minaly 5 40 K s al be u e A ran e
c aracteristic of 5 40 K w he ev er it ta n be ac iev ed
c romatic distibutio of th pr oje tor lg t a nd of t he Scr ee
3.3 T o f acitate t he iuminatio of a v is al s r r ou d, it may
be d sir able t o u e a Scr ee of low r ef le tan e, or o e w ith
dire tio al pr oper tie (Se an e A 1.2.)
WO + 4 f t2)] Th’ IS I uminan e wi prod c , w ith a fim c nf or -
mo itors
3.5 T he luminan e at a distan e of 5 % of t he Scr ee w idth
be r estr i te to that area fom w hic t he luminan e toler ante is
oper ativ e
f our to six time t he Scr ee h ig t Its siz s al be s ficie tly
time t he Scr ee area is po sible (s c t he fig r e)
4.2
1) At pr es nt at t he Stag of dr af t
2) f t = fo tL mbert
Trang 4D
Fig r e
Ta ble
Ratio of dime sio s
I
l,o
3,0
1,3
4m
a nn x A Z 1)
6.1 T he lev el of lg t s al be in ig ificant in c mp ris n w ith
that of t he Scre n iuminatio a nd s r r ou d
ac iev e this, Wals s o ld be of low r efle tan e
emplo e
Scre n a r ea
5.2 T he area of t he iuminate s r r ou d s al be pr ef er ably a t
least eig t time t he Scre n a r ea (s c t he f ig r e)
cautio e that t he elminatio of a lg te s r r ou d r ed c s t he
v iew er’s s n itivity in makin ju gme t of c ntast
2
Trang 5A nnex
(This a nn x forms p rt of t he Stan ar d.)
opera te at clo e to 5 40 K T he X en n arc wi oper a te clo er
a ge A noth r meth d is t o u e a blu ph tometr i fiter hav in
a mir ed s if v alu of a pro imately 1 0 u its w ith a pr oje tor
hav in a t un ste So rc , c an in its n minal c lo r of a bo t
3 5 0 K t o 5 40 K A mire s if of min s 1 0 u its may be ob-
g latin fiter is n t r ec m e d d
may n t giv e relativ e re ults w ith X en n iuminatio or ot her
A noth r meth d is to u e a tu g te lg t So r ce e uip e w ith
f iltere t o 5 40 K by a s p leme tar y fiter ov er t he le s, a
ca ale of a beam o tput of th Or der of 10 Im, a mat w hite
Scr ee t a n be u e If 5 0 Im ar e av aia le, a 2 % r ef le tio
th dire tio al hig -gain Scr ee make it po sible t o ac iev e t he
r ear pr oje tio sr ee s, pr ov id d u iformity of iuminatio ta n
be ac iev ed
For ae th tic r eas n , a Scr ee mas or bor der may be d sir ed
If u e , it s o ld pr ef er ably be c nf in d t o a w idth n t e -
c e in 4 % of picture w idth
luminan e This is mo t f r eq e tly a bo t 1/5 t he picture w hite
luminan e, alt ho g it ta n v ary wid ly How ev er , f or Optimum
s n itivity of th obs r v er to c lo r casts a nd c lo r blan e
erors, a hig er s r r ou d br i htn s is r eq ir ed a nd a v alu of
1/3 th pictur e w hite luminan e is f r eq e tly u e , a lth u h
this may be f ou d tirin to th obs rv er in lo g rev iew Se sio s
Id aly, t he s r r ou d br i htn s le el s o ld be adju ta le, but
if a Sin le-v alu d c mpromis is ad pte , it s o ld le bet w ee
t he lmits 1/6 to l/ lO of th ope ga te Scr ee luminan e, ie
1/3 t o 1/5 pictur e w hite luminan e for a typical print T he lev e8
te ua te t he Scr ee luminan e by t he r eq ir ed factor alewir+ z
A.2.2 lt is imporant that t he s rr ou d matc t he Scr ee for
c lo r The u e of a 0,6 d n ity n n-s le tiv e, n n-state n
Scr ee w it h s r r ou d, is t he easie t a nd mo t acur ate w ay to
v erify s c a matc lt is n c sar y, h w ev er , that t he fiter
as In o el t a n fi this r eq ir eme t
Sur r ou d iuminatio may be obtain d in s v er al w ay lt ta n
v id d t he Scr ee its lf is n t lt This t an be ac iev ed by placin
th Scre n in a plan in f r ont of th s r r ou d plan , w ith s r
r ou d lg ts be in th Scr ee lt t an als be ac iev ed by pr o-
Scre n area Or , it ta n be ac iev ed if a dire tio al hig -gain
c lo r temper atur e of 5 40 K
Scre n in th s r rou d area may sti permit t he e s ntial per f or -
man e of this rev iew ro m
blan e and d n ity for pr i ts is pr ef er r ed u d r th larg r
lg te -s r rou d c n itio How ev er , it is po sible, be au e of
t he v is al ada pta tio , f or a n obs rv er in t he darke e ro m to
le s acepta le or u acepta le in th pr es n e of t he lg te
s r r ou d
3