textile illuminants - asolengin

TEXTILE ILLUMINANTS
Due to the different light sources, CIE has done a classification, based on its
spectral distribution. In particular, it defines the spectral energy distribution of
a number of illuminants, (some of which do not exist as light sources), in order
to use the description of the colour. Here are the graphs of the spectral
distributions of some CIE standard illuminants.
Decomposition of white light into its spectrum, as it passes through a
prism:
Visible spectrum to the human visual sense:
ILLUMINANTS
The illuminant A is based on incandescent tungsten filament. Spectral
distribution corresponds to that of a black body at about 2856 K.
The names of the series daylight (daylight) start with a D letter and two digits
indicating the approximate colour temperature. D50 has a temperature of about
5,000 K.
When the sun is noon, the colour temperature is around 5,000 K. When the
sun is on the horizon, the colour temperature is lower. When there are clouds in
the sky, it’s about 6,500 K, while at the shade It’s 7,500 K.
The standard illuminant E is an equal energy illuminant, (it has the same power
at all wavelengths of the light spectrum). It’s a theoretical illuminant used for
colorimetric calculations.
The standard illuminant F series (F1 to F12) are used to standardize
fluorescent lamps.
It’s very important to understand the concept of
illuminant, to understand and to prevent metamerism in
colour reproduction, in the textile industry.
AUTHOR
Antonio Solé Cabanes
Textile Engineer
[email protected]
www.asolengin.net
www.asolengin.wordpress.com
Nombre de archivo:
TEXTILE ILLUMINANTS
Directorio:
C:\Documents and
Settings\T.Solé\Escritorio\WORDPRESS\COLORIMETRÍA
Plantilla:
C:\Documents and Settings\T.Solé\Datos de
programa\Microsoft\Plantillas\Normal.dotm
Título:
Asunto:
Autor:
T.Solé
Palabras clave:
Comentarios:
Fecha de creación:
18/10/2013 17:30:00
Cambio número:
2
Guardado el:
18/10/2013 17:30:00
Guardado por:
T.Solé
Tiempo de edición:
1 minuto
Impreso el:
18/10/2013 17:30:00
Última impresión completa
Número de páginas:
5
Número de palabras:
306 (aprox.)
Número de caracteres:
1.683 (aprox.)