ATIS Telecom Glossary
Sunday, April 20, 2014

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optical density (OD)
For a given wavelength, an expression of the transmittance of an optical element. Note 1: Optical density is expressed by log10(1/T) where T is transmittance. Note 2: The higher the optical density, the lower the transmittance. Note 3: Optical density times 10 is equal to transmission loss expressed in decibels, e.g., an optical density of 0.3 corresponds to a transmission loss of 3 dB.

 

 

 

 

 

 

 

 

 

 



 
These definitions were prepared by ATIS Committee PRQC
 
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