BP850 narrowband filter is a near-infrared bandpass filter developed for the near-infrared 850nm band. Since this series is widely used in various biometric detection applications, it can also be called biometric filter. Allows light near the near-infrared wavelength of 850nm to pass through. Since the wavelength of 850nm is located in the near-infrared region, the BP850 narrow-band filter has extremely prominent applications. It has strong shielding properties and is not easily absorbed by water. Therefore, the BP850 narrow-band filter is widely used in the field. Has a wide range of applications.
Model: BP850
Specifications: Customized
Material: Optical glass
BP850 narrowband filters usually use the interference principle of multi-layer dielectric films to achieve selective transmission of wavelengths. By precisely controlling the thickness and refractive index of each layer of dielectric film, light of a specific wavelength can be reflected and interfered between the film layers, thereby achieving enhanced transmission of the wavelength, while light of other wavelengths is suppressed due to different phase differences.
Optical indicators
350nm-830nmT<0.01%
870nm-1100nmT<0.1%
FWHM:23nm
CWL:850nm T>58%
Application fields
Infrared imaging: In night vision devices (using 850nm near-infrared light source and filter to achieve night imaging), infrared thermal imaging (used to detect human body temperature), etc., it is used to filter out visible light and improve the clarity and contrast of infrared imaging.
Biometrics: used in face recognition (850nm near-infrared light is more sensitive to facial texture and can obtain clearer facial images), iris recognition (850nm near-infrared light can penetrate the cornea and directly illuminate the iris to obtain more accurate iris features) and other fields to improve recognition accuracy.
Industrial automation: used for object detection, measurement, positioning, etc. Industrial testing is used for non-destructive testing, material analysis, etc.
Medical instruments and imaging: used for pulse oximeters to measure oxygen saturation in blood, fluorescence imaging, optical coherence tomography (OCT), etc.
Optical communication: used in fiber-optic communication systems to filter out stray light and improve communication quality.
Laser technology: used for laser resonator, laser measurement, etc.
Robot vision: helps robots perceive the environment and complete various tasks.
Remote sensing and scientific research: used for surface feature identification and spectral analysis for scientific research.
BP850 narrowband filter curve
