Konica Minolta T-10A, Инструкция по эксплуатации

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52
[Conforms to JIS]
Ideally, the relative spectral responsivity of the illuminance meter should match V (
λ
)
the spectral luminous efficiency of the human eye for photopic vision.
As shown in the graph above, the relative spectral responsivity of Konica Minolta Illuminance
Meters T-10A/T-10MA is within 6% (f
1
’ ) of the JIS spectral luminous efficiency V (
λ
).
Class General class Precise General class AA General class A
f
1
’
(%) 3 6 9
JIS ; Japanese Industrial Standards
f’1 (JIS’s symbol) ; The degree to which the relative spectral responsivity matches
V (
λ
) is characterized by means of the error f
1
’ .
Note : The contant has the dimension nm
-1
S’(
λ
)
rel
normalized relative spectral responsivity
P(
λ
)
A
Spectral distribution of the illuminant used in the calibration
(standard illuminant A)
S(
λ
)
rel
Relative spectral responsivity with arbitrary reference
V(
λ
) Spectral luminous efficiency of the human eye for photopic vision
d λ
Wavelength pitch
λ
1
Lower limit of visible wavelength region
λ
2
Upper limit of visible wavelength region
S ( )
rel
=
P( λ )
A
V( λ )
d
λ
P( λ )
A
S( λ )
rel
d
λ
•
S( λ )
rel
λ
λ
1
λ
2
ʃ
λ
1
λ
2 ʃ
′
0
10
20
30
40
50
60
70
80
90
100
Relativ
e spectr
al response (%)
750 700 650 600 550 500 450 400
Wavelength (nm)
The spectral luminous efficiency
Konica Minolta Illuminance Meters T-10A/T-10MA
f
1
′
=
λ
1
λ
2
S
′
( λ )
rel
-V( λ )
d
λ
V( λ )
d
λ
×
100(%)
ʃ
λ
1
λ
2 ʃ
Relative Spectral Response