Changchun New Industries Optoelectronics Technology Co., Ltd.
Lasers, Optics & Photonics

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Customer Service
TTL or Analog Modulation
Fiber Coupling
Coating Service
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Complete Solution
Contact CNI
Tel: +86-431-85603799 / 89216078
国内: 0431-87020257 / 89216068
Fax:    +86-431-87020258
E-mail:  [email protected]

Notch Filter


Narrow notch filters are used in Raman spectroscopy and instrument amplifiers to reduce or prevent audio feedback, while having little noticeable effect on the rest of the frequency spectrum. Other names include 'band limit filter', 'T-notch filter', 'band-elimination filter', and 'band-reject filter'.



Standard Product


BK7 / K9 / Fused Silica

Paraxial Focal Length


Paraxial Focal Length



3 arc minutes

Clear Aperture



0.25 mm x 45°

Surface Quality

 20-10/ 40-20/ 60-40

Surface Figure

l/[email protected]

         Test curve:

Product Application: Mainly used in the field of biochemical laser system, fluorescence instrumentation and Raman spectroscopy.
Material: K9, fused silica
CNI can offer different kinds of notch filters upon your requests.



Addr: No.888 Jinhu Road High-tech Zone,Changchun 130103, P.R.China

Tel:+86-431-85603799     Fax:+86-431-87020258     E-mail: [email protected]

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