Konica Minolta CHROMA METER User Manual

Light-Receiving Element (Sensor)
The CS-150/160 is a high-accuracy tristimulus luminance color meter using three sensor
outputs (XYZ = Red, green and blue) of the spectral responsivity corresponding to human
eye sensitivity (CIE1931 color matching function).
It uses this spectral responsivity to measure an object, calculates the obtained tristimulus
values (X, Y and Z) to convert them into L
v x y, Lv uʼvʼ, Lv Tcp duv, dominant wavelength, and
excitation purity, and display the result as a measured value.
The chromaticity coordinates (x, y) using L
V x y (CIE 1931 color space) can be obtained by
the following equations:
x =
X
, y =
Y
where X, Y and Z are tristimulus values.
X + Y + Z X + Y + Z
CIE1931 color matching function
and spectral response of CS-150/160
Standard spectral luminous efficiency
and spectral response of LS-150/160
z
yx
Wavelength (nm)
1.0
0.5
0.0
380 430 480 530 580 630 680 730 780
Wavelength (nm)
1.0
0.5
0.0
380 430 480 530 580 630 680 730 780
CIE1931 color
matching
function
Relative spectral
responsivity of
CS-150/160
Standard
spectral
luminous
efficiency
Relative spectral
responsivity of
LS-150/160
Relative responsivity
Relative responsivity
The LS-150/160 is a high-accuracy luminance meter using a sensor output of the standard
spectral luminous efciency corresponding to human eye sensitivity.
JIS C 1609-1:2006 species the evaluation of the spectral responsivity of a luminance
meter as follows based on the deviation "f1'" from the standard spectral luminous efciency
V (λ) when the instrument is calibrated with a standard light source with spectral
distribution of 2856K black body radiation.
Classication General Precision Class General Class AA General Class A
f
1' 3 6 9
The relative spectral responsivity of the LS-150/160 is equivalent to General Class AA (JIS
C 1609-1:2006) and conforms to Class B of DIN 5032-7. The value f
1' is obtained by the
following equation:
The value S'(λ)rel is expressed by the following equation:
P(λ)A: Relative spectral distribution of standard illuminant A
S(λ)rel: Relative spectral responsivity of the illuminance meter
V(λ): Standard spectral luminous efciency
dλ: Measurement wavelength interval (10 nm)
λ1: Lower limit of visible wavelength range
λ2: Upper limit of visible wavelength range
98
Explanation and
Information
OBSERBER

Konica Minolta CHROMA METER Specifications

General

Brand	Konica Minolta
Model	CHROMA METER
Category	Measuring Instruments
Language	English