Longpass Filter

At Coligh, we specialize in the custom design and high-volume production of high-performance Longpass Filters spanning a massive spectral range from 400nm to 11400nm

covering:

  1. UV longpass filter
  2. Visible longpass filter
  3. NIR longpass filter
  4. SWIR/MWIR longpass filter

Our longpass filters deliver ultra-steep transition edges, high transmission efficiency in the passband, and deep blocking (OD4 to OD6) in the rejection zone.

Our custom longpass filters are engineered for mission-critical, high-value industrial and scientific systems:

LiDAR & Autonomous Driving Systems

  1. Advanced Machine Vision & Industrial Inspection
  2. Fluorescence Detection & Life Sciences
  3. Biomedical & Raman Spectroscopy
  4. Defense, Thermal & Infrared Imaging

Whether you need rapid prototyping for R&D or scalable industrial manufacturing, our engineering team works closely with you to deliver custom longpass filters optimized for your exact optical architecture.

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