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Optical Notch Filters (Standard)

  • Designed to reject a specific range of wavelengths while offering high transmission to the remaining wavelengths
  • Enabling the Isolation or removal of certain spectrum
  • Optical Density: standard: <OD3, OD4, or custom
  • Sharp transition slopes, >90% transmission outside the stop band
  • Applications: spectroscopes, Raman spectroscopes, telecommunications, biochemical lasers, lidar
Inquire for custom product  
Code Types Material Central Wavelength Size Transmission Wavelength Range Transmission Rate Blocking Range Optical Density Bandwidth Unit Price Delivery Cart
40802-001 Notched Filter K9 283nm±5 / 250nm &320-700nm T>90% 283nm±5 <OD3 / Inquire Inquire
40802-002 Notched Filters K9 308nm±5 / 260-275nm &340-700nm T>90% 308nm±5 <OD3 / Inquire Inquire
40802-003 Notched Filters / 405nm±2 D25X3mm / T>90% 405nm±2 OD4 20±1nm Inquire Inquire
40802-004 Notched Filters K9 470nm±5 / 400-445nm &490-700nm T>90% 470nm±5 <OD3 / Inquire Inquire
40802-005 Notched Filters K9 480nm±10 / 380-420nm &560-720nm T>80% 440nm-540nm <OD3 / Inquire Inquire
40802-006 Notched Filters K9 532nm±3 / 400-495nm &550-950nm T>90% 532nm±3 <OD3 / Inquire Inquire
40802-007 Notched Filters / 785n±2m D25X3mm / T>90% 785nm±2 OD4 30±1nm Inquire Inquire
40802-008 Notched Filters / 808nm±2 D25X3mm / T>90% 785nm±2 OD4 30±1nm Inquire Inquire

Optical Notch Filters also known as Optical Band Stop Filters or Optical Band Reject Filters are optical components designed to block specific wavelengths of light in selection while allowing others to pass through with little hindrance. Notch filter offers high transmission out of the stop band and large attenuation to the wavelengths outside the stop, enabling isolation of spectral regions or suppressing unwanted background noise. In fact, an optical notch filter can be viewed as an inverse of a bandpass filter.

Several important key parameters need to be taken into consideration when selecting notch filters specified to your requirements: stop band wavelength (i.e., the wavelength range at which the light signal will be blocked), power handling capabilities (i.e., the maximum power threshold tolerable for the filter), and the most important factor, optical density, which determines the rejection strength of an optical notch filter. To be more precise, the formulated relationship between OD and Transmission% is OD=log10 1/T where OD is optical density and T is absolute transmittance. 

With sharp transition slopes at the rejection and transmission regions, our optical notch filters deliver optimized results in various optical applications where spectral control is paramount. For instance, in spectroscopes, notch filters are used to remove unwanted spectral lines or laser wavelengths, allowing researchers to focus on the target signals of interest. Besides, notched filters are also utilized in fluorescence microscopes and biochemical lasers, allowing for the investigation of molecular interactions and the identification of chemical compounds. The notch filters we supplied in Shalom EO cater to an extensive spectrum, with their standard or custom center wavelengths covering the common laser line wavelengths of 405nm, 488nm, 514nm, 533nm, 561nm, 594nm, 633nm, 658nm, 785nm, 808nm, 980nm, and 1064 nm, and other UV, VIS, IR wavelengths.

This page specifies Shalom EO's Off-the-shelf Optical Notch Filters. Our optical band stop filters consist of  BK7 or UV Fused Silica substrate stacked with dielectric coatings, which attenuate the light within the rejection band through destructive interference and reflection, the available standard optical densities can be <OD3 or OD4, while the out-of-band transmission is >90% or can be customized. All the optical notch filters are mounted in black anodized Aluminum rings for ease of handling, the ring can further increase the optical density by ameliorating scattering. Custom notch filters with a maximum rejection depth of OD6 and other selectable specifications are also available.

Specifications:

MaterialsK9Size/
Optical Density at Rejection Wavelength<OD3 or OD4High Transmission at Transmission Wavelength Range>90%
Surface Quality
60/40 S/D
470 CWL OD3 Notched Filter

470 CWL OD3 Notched Filter

808 CWL OD4 Notched Filter

808 CWL OD4 Notched Filter

785 CWL OD4 Notched Filter

785 CWL OD4 Notched Filter