Thin Film Design & Applications  
  
 
 
 
 
 
 

Terminology

 

a - absorption coefficient - where,
                          wpe1.jpg (1138 bytes)
CRI
- Color Rendering Index - a unit of measure that defines how well colors are   
         rendered by different illumination conditions in comparison to a standard (i.e. a
         thermal radiator or daylight).

d
- physical thickness of a film layer
HWOT - halfwave optical thickness of a film layer (index=nf) where,
                          wpe12.gif (1017 bytes)
k - extinction coefficient - unit of measurement for film absorption
l - wavelength (in nanometers, unless specified)
n
- index of refraction
QWOT - quarterwave optical thickness of a film layer (index=nf) where,
                          wpe1.jpg (1250 bytes)
x, y - 1931 CIE chromaticity coordinates
X, Y, Z - tristimulus values

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