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A Dichroic Filter is an example of what you describe. https://en.wikipedia.org/wiki/Dichroic_filter https://en.wikipedia.org/wiki/Dichroic_filter
by femto 12y ago
A Dichroic Filter is an example of what you describe.
https://en.wikipedia.org/wiki/Dichroic_filter https://en.wikipedia.org/wiki/Dichroic_filter