850nm bandpass filter is a type of optical filter that allows light within a narrow wavelength range centered around 845 nanometers (nm) to pass through while blocking other wavelengths. This type of filter can be useful in applications of infrared (IR) spectroscopy, optical communications, remote sensing, and medical imaging.

Coligh’s stock standard 850nm bandpass filter feature:

• Feature: NIR bandpass filter
• Center wavelength: 850±2nm
• FWHM: 10±2nm
• Blocking range: 200-1100nm
• Blocking depth: OD2, OD3
• Transmission average: Above 90%
• Thickness：0.5mm, 0.55mm, 0.7mm, 1.0mm, 1.1mm
• Size: Any size below 100*100mm

Custom option:

• Bandwidth: 10nm, 25nm, 55nm, 60nm or any bandwith client request
• Blocking depth:OD4, OD5 is availiable
• Size: round or square smaller than 100*100mm
• Material thickness: Depend on request
• Transmission and blocking rang: custom as per requirement or between 200nm to 1500nm