A 780nm longpass filter is an optical filter that transmits light with wavelengths longer than 780nm, while blocking or attenuating light with shorter wavelengths.
The primary application of a 780nm longpass filter is in optical systems that require the separation of near-infrared light (NIR) from visible light or shorter-wavelength light. For instance, in fluorescence microscopy, a 780nm longpass filter can be used to block visible light and shorter-wavelength excitation light while allowing the longer-wavelength emission light to pass through. This results in a high signal-to-noise ratio for the detection of NIR fluorescence.
Coligh’s stock standard 780nm longpass filter:
- Type: longpass filter
- Coating: Hard coated
- Angle of incidence: 0°
- Wavelength cut on tolerance :780+/-10nm
- Blocking depth: >=OD4 >90%@800-1100nm
- 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
