dichroic filter

https://doi.org/10.1351/goldbook.DT07355
Note:
The name dichroic arises from the fact that the @F02384@ appears one colour under illumination with transmitted light and another with reflected light.
Source:
PAC, 2007, 79, 293. (Glossary of terms used in photochemistry, 3rd edition (IUPAC Recommendations 2006)) on page 323 [Terms] [Paper]