Thin dielectric films with different refractive indices are coated in multiple layers, and light interference is used to allow the selection of transmission or reflection of light from a light source at the desired wavelengths.
The number of layers of thin dielectric film coated can be from a few to several hundred, which allows various characteristics to be realized.
The shape of the substrate to be coated can be anything from flat to a parabolic mirror.
Lamp reflectors.
This mirror can be applied to various fields, including laser processing machines.
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.
Laser light sources, laser Raman measurement, medical treatment, various analysis, etc.
