Beam Splitter

[pinholeblender]

I wonder if this could be used to make a self separating RGB camera
http://www.surplusshed.com/pages/item/l14562.html

[DaveBell]

"Polarized in such a way ..."
How do they DO that?!? This is almost fascinating enough to invest $30, just to see it work!
I wonder how well separated the color bandwidths are...
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OK, they're dichroic prisms, and $35 for a 35mm cube is a very good price.
There are a lot on ebay, most appear to be seconds, with nicks, etc.

At http://www.cnilaser.com/combiner.htm there's a chart showing separation % for similar 2- and 3-color prisms/

[dwerg85]

This is more or less what one would find in a 3ccd video camera right? I think i've seen something like that when taking one of them apart once.

[earlj]

I envision three monochrome negatives for printing 3 color gum or carbon prints. But since digital color separations are so easy, why bother? I guess I shouldn't ask that kind of question on a site where everyone builds their own cameras out of tins cans and plywood. . . . .

[earlj]

I ordered one of these gizmos, so I will let you know what it looks like when it arrives.