Features
A notch filter removes only specific wavelengths and transmits light of other wavelengths.
Wavelengths blocked by the notch filter can be set at will from a single wavelength to multiple wavelengths, and the wavelength range of ultraviolet, visible or infrared is not selected.
Advanced film design using multilayer dielectric film allows steep slopes to be realized to block specific wavelengths.
Notch filters, also known as band-stop filters, provide the opposite characteristics of band-pass filters, which transmit only specific wavelengths.
Applications
Laser light sources, laser Raman measurement, medical treatment, various analysis, etc.
Example of spectrum
A notch filter with a blocking performance of OD6 or higher at a specific wavelength (532 nm).
Notch filter with blocking performance of OD4 or higher at two specific wavelengths (550nm, 625nm).