An 850nm thin film optical filters is a type of optical filter that allows light with wavelengths centered around 850nm to pass through while blocking or attenuating light with other wavelengths. This type of filter is commonly used in applications that involve near-infrared light, such as in telecommunications, sensing, and imaging.

Coligh’s stock standard 850nm thin film optical filters feature:

• Feature: NIR bandpass filter
• Center wavenelgt： 850±5nm
• FWHM: 60±10nm
• Blocking range: 200-1100nm
• Blocking depth: OD2, OD3
• Transmission average: Above 80%
• Thickness：0.5mm, 0.55mm, 0.7mm, 1.0mm, 1.1mm
• Size: Any size below 100*100mm

Custom option:

• Bandwidth: 10nm, 25nm, 30nm, 40nm, 50nm,70nm, 100nm, 150nm any bandwith client request
• Blocking depth:  OD4, OD5, OD6 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