How is polarization minimized in HunterLab sphere instruments?

FAQ: “Do you sell a depolarizer for my HunterLab sphere instrument?  On occasion we test polarized samples and there is definitely a dependence on the orientation of the lens.  I was wondering if adding a depolarizer would eliminate this phenomenon?”

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Directional Instruments

HunterLab Directional Instruments

HunterLab Directional Instruments

 

HunterLab manufactures bench top instruments with two different geometry types: directional 45/0 (or 0/45) and diffuse sphere instruments, as discussed in a previous blog note. A 45/0 directional instrument illuminates the sample at a 45˚ angle from the sample surface and the detector is located 0˚ in line perpendicular to the sample surface. The inverse, 0˚ illumination and detection at 45˚, can also be used and yields equivalent measurements. The MiniScan EZ and ColorFlex EZ instruments are 45/0 instruments and the LabScan XE is a 0/45 instrument. Continue reading