polarization and dichroics

Posted by Antonio Jose Pereira-2 on
URL: http://confocal-microscopy-list.275.s1.nabble.com/polarization-and-dichroics-tp7592058.html

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Hi all,

I'm resorting to those of you who are experienced with anisotropy measurements or polarization optics in general. I might need a long-pass dichroic beamsplitter at 45º, but where the longer wavelengths (fluorescence) will pass through the dichroic backwards. I mean that light from the source is to be reflected, whereas the fluorescent light is to be transmitted back to the source. Polarization preservation upon reflection is not important for me, but preservation upon (backwards) transmission is.

I reckon that taming polarization states with dichroics (and virtually all optical elements) is already an issue. I wonder how much more it will be by using the dichroic in such geometry.
Or maybe there other optical elements better suited for this purpose?

Thanks in advance for any comment or suggestion,
Antonio