A 670nm deep blocking longpass filter is a type of optical filter that blocks light below 670nm wavelength and transmits light above that wavelength. This type of filter is commonly used in fluorescence microscopy to block excitation light and allow only emitted light to pass through to the detector.

Coligh’s stock standard 670nm longpass filter:

• Type: longpass filter
• Coating: Hard coated
• Angle of incidence: 0°
• Wavelength cut on tolerance :670+/-10nm
• Blocking depth: >=OD4
• Transmission: >90%@690-1100nm
• Thickness: 1.0mm, 1.1mm, 0.5mm, 0.7mm
• Surface quality: 80/50, 60/40
• Size: smaller than 100*100mm

Custom option:

• Cut on and cut off wavelength: custom
• Working wavelength: according to client’s request
• Material and thickness: according to client’s request
• Surface quality: 40/20 is in option
• Size: Any size round or square smaller than 100*100mm