Notch filter

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