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OD to %T conversion
Conversion of optical density to % transmission.

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OD to %T conversion diagram
calc
The optical transmission of a sample is given by 10 to the power of -(optical density). %T is 100 times this result, and %Absorption is 100-%T.
An OD of
gives
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An optical density of 1 corresponds to 10% transmission, and of 2 to 1% transmission. Another calc provides the reverse calculation.
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© Andy & Steve Shipway 2008