Tiêu chuẩn iso 04852 1978 scan

INTERNATIONAL STANDARD 4852 I NTERNATIONAL ORGANIZATION FOR STANOAROIZATION ME~YHAFO~HAR OPrAHM3ALblR l l0 CTAH~PTM3A~HM ORGANlSATlON I NTERNATIONALE DE NORMALISATION Personal eye protectqrs I nfra re[.]

INTR A TIO AL O G NIZATIO FO STAO R IZATIO ME Y HAFO~H R O rA M3ALlR l-l0 CTA~PTM3A~HM.O G NlSTlO INT RA TIO AL DE N RMALISTIO

Protectio in iv iduele d Io i - F iltres p ur I n frarou e - Uti sa tio et sp cifica tio s

F irst editio - 197 -10-01

Demriptors : a ccid nt p rev entio , e e , op tic al fiters, infa re radiatio

Pric ba se o 4 p g s

IS0 (the Interna tiona l O rganization for Stan ardization) is a worldwide federation

up has the rig t to b re resented on tha t commite Interna tiona l orga nization ,

governmental an non-gov ernmental, in la ison with ISO ,also take pa rt in the work

Dra ft Internationa l Stan ard ado ted by the tec nica l commite s are circ la ted

circ lated to the memb r b dies in Apri 19 7

I has b en a proved by the memb r b dies of the folowin cou tries :

Belgium

Irelan

Finlan

South Africa , Re of

Sp in

T urk ey

U.S.S.R

Yu oslav ia

Q Interna tionalO rganizatio for Stan ardizatio , 1978 l

Printe in Switz rlan

Persona ley e-protec tors - Infra -red fi ters - Uti isa tion a nd

and the tra nsmita nc e req irements fo fiter s for p rotec-

tion aga in t infr a-r ed r adiation I a lso giv es g ida nc e on

their selec tion a nd u e

Ey e-protec tors u ed for p rotec tion again t infr a-r ed

IS0 4 4 T he latter a lso deals with gener alc on idera tion

r elatin to ey e-p rotec tors, s c a s identification

Optic al test method for ey e-p rotec tors form the s bjec t

of IS0 4 85

s bjec t of IS0 4 5

IS0 4 0 , Perso a l eye-protectors - V oca bula ry

IS0 4 4 , Perso a l eye-protectors - Sp cifica tio s.1 )

IS0 4 5 , Perso a /eye-protectors - O ptica l testmeth ds, 1 )

meth ds 1 )

T he c omplete tab le of n mb erin of fiter s is giv en in

c la use 3 of IS0 4 84 9

T he s mb l for infr a-r ed fiter s inc lu es c ode n mb r 4 ,

a nd the s a de n mb r c oresp on in to the fite r , from

1.2 to 10 (se c la use 4 b elow)

The definition of transmita nc e ar e given in IS0 4 00

T he determina tion of transmita nc e is desc rib d in c la use 5

of IS0 4 54

The tra nsmita nc e variation mea sured by the sc a nnin of

a lg t b a m of 5 mm diameter over the entir e are of the

fite r , exc ept on a marginal ar ea 5 mm wide, s all rema in

within the lmits defined a s “r elative u c er ta inty ” in tab le 2

of IS0 4 54

The transmita nc e req irements for fiter s u ed for p r otec -

tion again t infr a-r ed radiation ar e given in tab le I

T A BL 1-Transmitanc ere uireme ts

Maximum meantansmitanc einth infa.re

spe tum

Sca le umber

maximum

9

minimum

Yo

1) At p resent at th stage of dr af

Ad itional req irements :

sc a les :

7 (jz = 313 nm) < 0,l 7”

b ) Betwe n 210 and 313 nm, tra nsmita nc e s all not

exc eed that sp ec ified for 313 nm

NOT - L umin u ta nsmita nc e valu s, as s own in tab le 1, and

c hrom icity c o-ordinate of infr a-r ed fiters s a ll b e b ase o th

sp ec tral distib utio for a ful r adiator 19 0 K and th CIE (19 1 I

standard ob server (2’) (s e tab le 3 in th ann x )

The tint rep resentative p oint of a n IR fite r may le within

the are defined in the fig r e b low

a) Purp le lmit

(x - 0,5 )2 + (y - 0,13)2 = 0,2 3

arc of a cir c le with radiu of 0,2 3, the c entre c o-

ordinates of whic ar e x = 0,5 , y = 0,13

0,4

0,4

0,3

0,3

0,2

b ) Red lmit

y= 1,3 3x -0,3

c ) Yelow lmit

y = 0,7 90 - 0,6 7 x

d) Yelow-gre n lmit

y = 0,4 40

e) Gre n lmit

y = 0,8 6 x t 0,0 0

f Blue lmit

x = 0,310

I

I

W X

FIGU E - Chrom icity lmits for IR fiters

5 GUIDA NCE ON S LECT IO N A ND U E

TA BL

2 - Numb erin and typ ical ap p lic atio s

s a le

Typica l ap p lic atio in terms of mea n

n mber

temp erature s urc es, ‘C

4 -3

1 210

4 -8

18 0

4 - 2a

F or p rotec tio againt infa-re radiatio fom

4 -2.5a s urc s of larg ar ea wh re p rotec tio again t glare

is n t e s ntial, for e a mple in rol n mi s

A NN X

T A BL 3- F a c torsforh c alc ulatio ofsp ec traltansmitanc e

and c rom icity c oordinate of fiters relative to a ful

radiator 19 6 Kandth Cl5 (19 1)standard b aervr (2"

1

s (Al

nm

C on tantC $= 1,43 79X 10-*m.K

7 80

z S(I) v'(b ) 10 ,0 0

30