什么是material Optical Density?

Optical Density Absorption Parameters iE}jilU  

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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. >SJ# rZ

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The example below shows the format for an optical density file. cnAwoTt4  
Data file for optical density {r2-^QHF  
dfat version 1.0 &wj;:f  
dataname: Optical Density Values y6KI.LWR9  
datapairs: wv od
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400 .023 9F~U% >GX  
500 .332 D$k4
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600 .4 n50XGv  
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