Topcon SR-LEDW - Page 136

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Observation visual field 10
   





samp
2
1
10
10
LxKX
   





2
1
samp
10
10
LyKY
   





2
1
samp
10
10
LzKZ
¯x10 (), ¯y10 (), ¯z10 (): Color matching functions in CIE 1964 auxiliary standard colorimetric
system
K: Parameter 683 lm/W
1: Measuring start wavelength 380 nm
2: Measuring end wavelength 780 nm
: =1
* “Y” of the observation visual field 2 is used for the luminance Lv of the observation visual field
10.
Chromaticity coordinates
Observation visual field 2
“xy” chromaticity coordinates in XYZ colorimetric system
ZYX
X
x


ZYX
Y
y


“u’v’” chromaticity coordinates in UCS colorimetric system
3Z15YX
4X
u'


3Z15YX
9Y
v'


Observation visual field 10
“x
10
y
10
” chromaticity coordinates in XYZ colorimetric system
101010
10
10
ZYX
X
x


101010
10
10
ZYX
Y
y


“u’v’” chromaticity coordinates in UCS colorimetric system
101010
10
10
3Z15YX
4X
u'


101010
10
10
3Z15YX
9Y
'v


Correlated color temperature and deviation
To calculate the correlated color temperature and deviation, use the spectral distribution of the JIS Z
8725 light source and the measurement method of the correlated color temperature.
Correlated color temperature display range: 1563 K≦Tc≦100 000 K
Deviation display range: -0.02≦duv≦0.02
Deviation means the distance from the black body radiation locus on CIE 1960 UCS chromaticity
diagram.