Collection: 850nm Bandpass Filter


Light at 850nm falls within the near-infrared (NIR) spectrum and has various applications across different fields. Here's a breakdown of some key uses:

  • Fiber Optic Communication: This is a very prominent application. 850nm is one of the most commonly used wavelengths in multimode fiber optic cables for data transmission. It offers a good balance between signal propagation distance and attenuation (weakening) within the cable.

  • Biomedical Imaging:

    • Imaging Techniques: Similar to other NIR wavelengths, 850nm light can be used in certain NIR imaging techniques like photoacoustic imaging or optical coherence tomography (OCT). These techniques can help visualize structures or blood flow within tissues, potentially aiding in medical diagnosis.
  • Military and Security (Night Vision): Night vision devices often utilize NIR illumination sources around 850nm.This wavelength is invisible to the naked eye but allows night vision goggles to amplify the reflected light and create a clear image in low-light conditions.

  • Material Processing: NIR light around 850nm can be used for certain material processing applications, such as non-destructive testing or laser cutting/welding of plastics and other materials.

  • Remote Sensing (Potential): While less common than some shorter NIR wavelengths, 850nm light might have some potential applications in remote sensing for specific purposes, like studying vegetation health or moisture content. More research is needed in this area.

850nm Bandpass Filter

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Applications for 850nm Bandpass Filter

Night vision and security: 850 nm LEDs are commonly used for illumination in night vision and security applications, such as surveillance, traffic control, license plate recognition, and biometric identification. A bandpass filter with a 850 nm CWL can block the ambient light and pass the reflected 850 nm LED light, enhancing the contrast and quality of the image. A dual bandpass filter that also passes the visible light can allow for full color imaging by day and infrared imaging by night.

Biomedical fluorescence: Some biomolecules, such as NADH and FAD, have fluorescence emission peaks around 850 nm when excited by near-UV light.A bandpass filter with a 850 nm CWL can block the excitation light and pass the emission light, enabling the detection and quantification of these molecules in biological samples.850 nm is also a very commonly referenced wavelength used in various vegetation health index calculations.

Laser diode cleanup: Some laser diodes have a broad spectrum of emission that can interfere with the desired wavelength.A bandpass filter with a 850 nm CWL can filter out the unwanted wavelengths and pass the 850 nm laser light, improving the spectral purity and the performance of the laser diode.

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