A 650nm bandpass filter is an optical filter that transmits light in a narrow wavelength range around 635nm, while blocking or attenuating light in other wavelength ranges. This type of filter can be used in a wide range of applications, including fluorescence microscopy, spectroscopy, optical communication, laser applications and sensing applications. Custom optical filters for 650nm at any FWHM are available.

Coligh’s stock standard 650nm bandpass filter feature:

• Feature: VIS bandpass filter
• Center wavelength: 650±5nm
• FWHM: 40±5nm
• Blocking depth: OD2
• Transmission average: Above 85%
• Size: Any size below 100*100mm

Custom optical filters option:

• Bandwidth: any bandwith client request
• FWHM: 10nm, 25nm, 30nm, 35nm, 50nm, 60nm, 70nm
• Blocking depth:OD3, OD4, OD5 is available
• Size: round or square smaller than 100*100mm
• Thickness：0.5mm, 0.55mm, 0.7mm, 1.0mm, 1.1mm
• Material thickness: Depend on the request
•  Transmission and blocking range: custom as per requirement or between 200nm to 1500nm