785/38nn band notch filter
785/38nn band notch filter

785/38nm Band Notch Filter

785nm Band Notch Filters are tailored for bioimaging and spectroscopy using precision thin-film coatings.Coligh customs high precision notch filter for R&D institutions

  • High transmission efficiency: Above 93% high transmission for visible range 400-760nm and near infrared 810-1600nm.
  • High precision: Deep blocking depth OD>6 at unwanted wavelength at 785nm and minimize interference
  • Wide application range: ideal for raman spectroscopy, optiical testing and laser system
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785/38nm Band Notch Filter Description

Coligh 785/38nm Band Notch Filter play critical roles in optical communication and laser systems:

  •  superior extinction performance: At 785nm, Optical Density (OD) >6 ensures complete suppression of 785nm signals (>99.999% attenuation), eliminating interference and preserving signal integrity for accurate measurement/data transmission.
  • ultra-high transmittance windows: Outside the notch band, dual passbands (400-760nm and 810-1600nm) achieve >93% transmission efficiency, minimizing signal loss and maintaining optical system performance while blocking undesired wavelengths.

785/38nm Band Notch Filter Spectrum

785/38nm Band Notch Filter Datasheet

Optical Filter type: Optical Notch Filter Transmission Range 400-760nm & 810-1600nm
Center Wavelength 785+/-5nm Transmission Average >93%
Optical Density OD>6 Angle Of Incidence 0 deg
FWHM 38nm Cone Half-angle 3 deg
Surface quality:  80/50 60/40 Coating Hard Coating

785/38nm Band Notch Filter Applications

  • Raman Spectroscopy: Blocks 785nm excitation lasers to eliminate residual light interference, ensuring clean Raman scattering signals.
  • Optical Communication Systems: Suppresses 785nm wavelength bands in telecom networks, reducing noise.
  • Fluorescence Microscopy: Attenuates 785nm background light to enhance weak fluorescent signals, achieving higher contrast imaging.
  • Laser Systems: Removes unwanted 785nm wavelengths from laser outputs, ensuring spectral purity for precision applications.
  • Automated Spectrometers: Enables precise wavelength selection and elimination in analytical instruments, enabling accurate substance identification through controlled spectral ranges.

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