A Optical Longpass Filter 780nm is designed to transmit light with wavelengths longer than 780 nanometers (nm) while blocking shorter wavelengths. This filter is ideal for applications in the near-infrared (NIR) spectrum, where isolating longer wavelengths is crucial for various optical, imaging, and laser systems.

Key features of the 780nm Optical Longpass Filter:

• Cut-On Wavelength: 780 nm – The filter allows light longer than 780 nm (red and near-infrared light) to pass while blocking shorter wavelengths, including most visible light.
• Blocking Range: Effectively blocks wavelengths shorter than 780 nm, such as UV and visible light, preventing interference from blue, green, and yellow light.
• High Transmission: Provides high transmission efficiency for wavelengths in the NIR region, ensuring minimal signal loss and optimal performance for light sources above 780 nm.
• Steep Cut-On Edge: Exhibits a sharp transition between blocked and transmitted wavelengths, ensuring precise separation between visible and NIR light.

Coligh’s stock standard 780nm longpass filter:

• Type: longpass filter
• Coating: Hard coated
• Angle of incidence: 0°
• Wavelength cut on tolerance :780+/-5
• Blocking depth: >=OD3@200-750nm
• Transmission: >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