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Dichroic/Microscope Florescence Filters

Started Apr 27, 2019 | Discussions thread
OP SmoothOperator Regular Member • Posts: 386
Re: Dichroic/Microscope Florescence Filters

D Cox wrote:

Matty W wrote:

I've never tried it, but I did attempt to buy those color blind glasses (that are apparently just band pass filters) to see if they would make my landscapes more vivid.

Didymium filters have more effect on human vision than they do on most cameras. They filter out the yellow, near to the Sodium wavelength, and the narrow-band filters used in typical Bayer mosaics already have a gap there.

I think dichroic filters are different than didymium, dichroic filters work by thin film reflection, like soap bubbles.  They use them to tune very specific color bands, so that light that stimulates fluorescent dyes is filtered out.  It looks like a single color like red or green is most popular, but there are also multiband filters for using three four or five dyes, which is what I am more interested in.  Interestingly enough they come in complement pairs, one to ensure the excitation light is not in the same range as the emission light, and the complement for imaging.

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