Contact Us

Notch Filter

  • Introduction

Notch Filter


The notch filter, in contrast to a narrow band filter, intercepts light in a particular wavelength range by transmitting light at most wavelengths.


Notch filters are useful in applications where it is necessary to filter out the laser light. For example, in drug bioassays, in order to obtain a good signal-to-noise ratio in Raman spectroscopy experiments, it is necessary to suppress the pumping laser, which can be achieved by placing a notch filter on the detection channel. Notch optical filters are also often used in laser-based fluorescence instruments and in biomedical laser systems.

Notch Filter wavelength



Related Content
  • Gallium Arsenide Lenses

    Gallium Arsenide Lenses

    February 17, 2017GaAs is semi insulator, which can be used in large power continuous CO2 laser system to replace the zinc sulfide in lens or mirror forms. GaAs is suitable in applications consists of toughness and dur...view
  • Ball & Half Ball Lenses

    Ball & Half Ball Lenses

    February 17, 2017Ball lenses are polished spherical lenses made by optical glass fused silica, sapphire or other optical materials which has relatively high transmission rate for diode with antireflection coating. Wid...view
  • Achromatic Cylindrical Lenses

    Achromatic Cylindrical Lenses

    February 17, 2017Achromatic cylindrical lenses are ideal for eliminating spherical and chromatic aberration at the image plane, for example using monochromatic light source, achromatic cylindrical lenses can form a 50...view