Tektronix LumaColor II J18, Instruction Manual

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Appendix B: Chromaticity Reference
B–8 J18 Photometer Instruction Manual
Spectral Tristimulus Values
Figure B–5 shows the spectral tristimulus (XYZ) values for a light
source of equal spectral power. Table B–1 lists the same data in
tabular format.
0
0.2
0.4
0.6
0.8
1.0
1.2
1.4
1.6
1.8
2.0
380 430 480 530 580 630 680 730 780
x(
l
)
y(
l
)
z(
l
)
Wavelength (nm)
Figure B–5: Spectral Tristimulus Values for Equal Spectral Power Source (CIE
1931 Standard 2
°
Observer)
Note that y(
l
) is also the photopic curve that represents the relative
sensitivity of the average human eye.
Appendix B: Chromaticity Reference
B–8 J18 Photometer Instruction Manual
Spectral Tristimulus Values
Figure B–5 shows the spectral tristimulus (XYZ) values for a light
source of equal spectral power. Table B–1 lists the same data in
tabular format.
0
0.2
0.4
0.6
0.8
1.0
1.2
1.4
1.6
1.8
2.0
380 430 480 530 580 630 680 730 780
x(
l
)
y(
l
)
z(
l
)
Wavelength (nm)
Figure B–5: Spectral Tristimulus Values for Equal Spectral Power Source (CIE
1931 Standard 2
°
Observer)
Note that y(
l
) is also the photopic curve that represents the relative
sensitivity of the average human eye.