BP850-40 Bandpass Filter(CWL=850nm,FWHM=40nm)

BP850-40 Bandpass Filter - Near-Infrared Imaging Excellence

The BP850-40 bandpass filter delivers exceptional performance in the near-infrared (NIR) spectral region at 850nm, a critical wavelength for machine vision, biometric sensing, and optical communication applications. With a balanced 40nm FWHM bandwidth and OD2 blocking, this filter provides optimal light throughput while maintaining effective spectral selectivity for demanding NIR applications.

Key Features

• Center Wavelength (CWL): 850nm - optimized for near-infrared applications
• Balanced Bandwidth: 40nm FWHM for excellent light collection efficiency
• Optical Density: OD2 blocking ensures 100:1 rejection of unwanted wavelengths
• High NIR Transmission: Optimized coatings maximize throughput in the near-infrared region
• Premium Quality: Hard-coated surfaces for long-term durability and stability

Applications

Essential for a wide range of near-infrared applications including:

• Machine vision and industrial inspection systems
• Biometric identification and facial recognition (iris scanning, vein pattern detection)
• Night vision and low-light surveillance cameras
• NIR fluorescence imaging and microscopy
• Optical communication and fiber optic systems
• Agricultural monitoring and crop analysis (vegetation indices)
• Semiconductor wafer inspection and quality control
• Spectroscopy and remote sensing applications
• Medical imaging and tissue analysis

Technical Excellence

The 850nm wavelength represents one of the most important regions in the near-infrared spectrum, offering unique advantages for imaging and sensing applications. At this wavelength, silicon-based detectors maintain high sensitivity while visible light can be effectively blocked, enabling clear NIR imaging even in bright ambient conditions. Our BP850-40 filter's 40nm bandwidth strikes an optimal balance between light collection efficiency and spectral selectivity.

With OD2 (100:1) blocking performance, this filter effectively rejects visible light and other unwanted wavelengths, ensuring clean NIR signal detection. This blocking is particularly important for machine vision applications where ambient visible light could interfere with NIR-based measurements and imaging.

The 850nm wavelength is widely used in biometric systems because it penetrates skin tissue effectively while remaining invisible to the human eye, making it ideal for iris recognition and vein pattern detection. The wavelength also corresponds to a local minimum in water absorption, making it excellent for biological tissue imaging applications.

Manufactured using advanced thin-film coating technology, the BP850-40 delivers consistent performance across the entire aperture with minimal transmission variation. The hard-coated surfaces ensure durability in demanding industrial and laboratory environments, maintaining optical quality through years of continuous use.

The 40nm bandwidth provides excellent compatibility with NIR LED sources, which typically exhibit broader emission spectra than laser diodes. This makes the filter ideal for cost-effective LED-based machine vision systems and surveillance cameras where maximum light efficiency is essential for optimal image quality.

Whether you're developing machine vision systems for industrial automation, building biometric identification devices, conducting NIR fluorescence imaging, or designing optical communication systems, the BP850-40 provides the perfect balance of spectral selectivity, light throughput, and blocking performance for professional NIR applications. Trust SyronOptics for optical components that deliver industrial-grade performance.