什么是material Optical Density?

Optical Density Absorption Parameters J9kmIMq-C  

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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. oBm^RHTZ

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The example below shows the format for an optical density file. H</Mh*Fl2G  
Data file for optical density y$]gmg  
dfat version 1.0 [CBhipoc  
dataname: Optical Density Values @Y~R*^n"}  
datapairs: wv od .!kO2/:6  
400 .023 Jf/X3\0N7  
500 .332 \1AtBc&  
600 .4 D?v)Xqw=  
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