Appendix; Glossary - Konica Minolta CL-70F Operating Manual

9.

Appendix

9-1

Glossary

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