cut-on filter
Optical device that only permits the transmission of radiation of wavelengths shorter than a specified wavelengths.
Although more rare than the @C01482@, there are a few cut-on filters on the market.
PAC, 2007, 79, 293. 'Glossary of terms used in photochemistry, 3rd edition (IUPAC Recommendations 2006)' on page 319 (