什么是material Optical Density?

Optical Density Absorption Parameters &xjeZh4-  

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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. n+;PfQ|

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The example below shows the format for an optical density file. WA79(B  
Data file for optical density A}Gj;vaw  
dfat version 1.0 m[!AOln)  
dataname: Optical Density Values `@r#o&
 
datapairs: wv od lITZ|u  
400 .023 MB]Y|Vee  
500 .332 p!w}hB598  
600 .4 +6v;(] y  
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