A Optical Longpass Filter 610nm is designed to transmit wavelengths longer than 610 nanometers (nm) while blocking shorter wavelengths, making it ideal for applications where selective filtering of visible and near-infrared (NIR) light is required. This filter allows red and infrared light to pass through while blocking shorter wavelengths in the visible spectrum, such as blue and green.

Key features of the 610nm Optical Longpass Filter:

• Cut-On Wavelength: 610 nm – The filter transmits wavelengths above 610 nm, including red light and near-infrared (NIR) regions.
• Blocking Range: Effectively blocks shorter wavelengths (below 610 nm), such as blue, green, and yellow light.
• High Transmission: High transmission efficiency for longer wavelengths, ensuring that light in the red and NIR regions passes with minimal loss.
• Steep Transition: A sharp transition between blocking and transmission regions for precise filtering of desired wavelengths.

Coligh’s stock standard 670nm longpass filter:

• Type: longpass filter
• Coating: Hard coated
• Angle of incidence: 0°
• Wavelength cut on tolerance :610+/-5
• Blocking depth: >=OD3
• Transmission: >90%@617-1100nm
• 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