什么是material Optical Density?

Optical Density Absorption Parameters x1$fkNu  

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Load -- Displays the Open dialog box so that you can find and select an existing file containing the wavelength and optical density values. }I,]"0b

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The example below shows the format for an optical density file. #<4h Y7/  
Data file for optical density l5D8DvJCj  
dfat version 1.0 LurBqr  
dataname: Optical Density Values GvF~h0wMt  
datapairs: wv od J'b*^K  
400 .023 W84JB3p  
500 .332 #{UM4~|:  
600 .4 JQi)6A?J  
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