Konica Minolta CL-70F - Appendix; Glossary and Specifications

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9. Appendix
9.
Appendix
9-1 Glossary
Term Description
Color
Temperature
Color temperature refers to the chromaticity of a heated object (commonly
refer to as a black body) that will vary according to its temperature. The color
temperature is measured in units of Kelvin (K) and refers to the temperature of
a heated object at a given color or chromaticity.
The higher color temperature is, the bluer the light, and the larger the Kelvin
value becomes. The lower the color temperature is, the redder the light, and
the smaller the Kelvin value becomes.
 gure that plots the changes of color temperatures on an y chromaticity
diagram is called the black body radiation locus.
Correlated
Color
Temperature
Not all light sources match the black body radiation locus when measuring light sources.
In this case, the correlated color temperature is used. The correlated color
temperature is a color temperature obtained by drawing an isotemperature line
from the black body radiation locus which matches the measured value.
Light
This refers to the electromagnetic wavelength ranging from 380nm to 780nm
that can be detected by the human eye.
Black Body
Theoretically, this is an object that absorbs all wavelengths and when heated,
emits light equivalent to the applied color temperature.
Black-body
Radiation
This refers to the light emitted by a black body.
The amount of energy released for each wavelength changes with the applied
color temperature, resulting in visible color variations.
K
Expressed in absolute Kelvin temperature, with units of "K". 0 (zero) K is
equivalent to -273.15 °C or -459.67 °F.
uv
The deviation between the correlated color temperature and the black body
radiation locus.
When the correlated color temperature is above the black body radiation locus,
a "+" sign is assigned; when below, a "-" sign is assigned.
CRI (Color
Rendering
Index)
uanties the faithfulness of color appearance under a measured light
source as compared to the color appearance under a standard light source.
Differences are expressed for individual hues, R1-R15, or as an average (Ra)
of values R1 through R8.
CIE1931
This is the trichromatic system based on the color matching function, x λ), y λ), and
z λ) that has been adopted by the CIE in 1931. (This is also called the XYZ color
system that has a  viewing angle.) It is applied when the eld of view is  or less.
CIE1964
This is the trichromatic system based on the color matching function, x
10
λ), y
10
λ),
and z
10
λ), which has been adopted by the CIE in 1964. (This is also called the XYZ
color system that has a 0 viewing angle.) It is applied if the eld of view eceeds .
CIE1976
This chromaticity diagram features a scale so that the sense of difference of
colors with the same illuminance becomes proportional to the geometric distance
on the diagram at all points of the chromaticity diagram, which was determined
by the CIE in 1976. This is calculated by the formula based on tristimulus values X,
Y and Z or chromaticity coordinates x and y of XYZ color system.