什么是material Optical Density?

Optical Density Absorption Parameters OjMDxG w  

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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. 5#d"]7

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The example below shows the format for an optical density file. nP'ab_
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Data file for optical density ;^}cZ  
dfat version 1.0 AyNl,Xyc4  
dataname: Optical Density Values h'UWf"d  
datapairs: wv od H|F>BjXn5  
400 .023
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500 .332 S_c#{4n  
600 .4 H
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