A 940nm bandpass filter optical is a type of optical filter that only allows light with a specific wavelength range of around 940 nanometers to pass through while blocking other wavelengths. These filters are commonly used in the field of infrared (IR) sensing and imaging, photography,  videography and quality control inspection.

Coligh’s stock standard 940nm bandpass filter optical 60nm FWHM feature:

• Feature: NIR bandpass filter
• Center wavelength: 940±10nm
• FWHM: 60±10nm
• Blocking range: 300-1100nm
• Blocking depth:>OD2
• Transmission average: Above 90%
• Thickness：0.5mm, 0.55mm, 0.7mm, 1.0mm, 1.1mm
• Size: Any size below 100*100mm

Custom option:

• Bandwidth:15nm, 20nm, 30nm, 40nm, 55nm, 60nm or  any bandwith client request
• Blocking depth:OD3,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