The NBP940 Narrow Band Pass Filter (black glass) is a specialized optical filter that selectively transmits a narrow range of wavelengths centered around 940 nm, blocking all other wavelengths. Its black glass substrate enhances absorption and blocks stray light outside the target band, making it ideal for applications requiring precise spectral filtering and minimal background interference.
Model: BP635 Filter
Specifications: Customized
Material: Optical glass
Main technical parameters
Model: GA-NBP-940-35
Central wavelength: 940nm
Transmittance: T>85%
FWHM: 35nm
Out-of-band cutoff depth: 350-1100nm@T<0.01%
Cutoff depth: OD3 to OD6 (depending on the specific product).
Product Features
High transmittance: It has extremely high light transmittance at the center wavelength, ensuring that the optical signal of the target wavelength can be transmitted efficiently.
Precise wavelength positioning: Through precise design and manufacturing, the filter is ensured to be highly selective for light of a specific wavelength.
Long service life: The use of hard film coating technology makes the filter have high mechanical strength and stability, extending the service life.
Small temperature drift: The use of ion evaporation technology effectively reduces the impact of temperature changes on the performance of the filter.
Applications
Infrared Illumination and Imaging:Used in night vision cameras and infrared (IR) sensors that operate at 940 nm.
Common in surveillance systems to isolate IR LED or laser light sources.
3D Sensing and Time-of-Flight (ToF):Filters 940 nm signals in depth-sensing technologies used in smartphones, robotics, and industrial applications.
Biometric Systems:Applied in face recognition, eye-tracking, or gesture-control systems using 940 nm IR light.
Remote Control and Communication:Optimizes IR transmission for devices using 940 nm light for data or signal exchange.
Medical and Scientific Instrumentation:Isolates specific IR wavelengths for spectroscopy or diagnostic imaging.
