Notch filters block one narrow band, usually a laser line, and transmit everything around it. They protect detectors and cameras from laser light while keeping the rest of the spectrum, which is essential in Raman and fluorescence work.
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Key specifications
- Centre wavelengths at common laser lines, for example 355, 405, 488, 532, 632.8, 785 and 1064 nm
- Optical density OD ≥ 4 at the notch
- Ø12.5, 25 and 50 mm, mounted
How to choose
Choose the notch centred on your laser line; the FWHM column shows how wide the blocked band is.
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