NEW MidOpt SiLWIR Filters – An Upgrade to Germanium for LWIR Thermal Imaging

Multipix Imaging is excited to introduce the new MidOpt SiLWIR Filter Series to our customers throughout the UK and Ireland – engineered exclusively for Longwave Infrared (LWIR) imaging applications!

Designed using innovative silicon-based materials, these filters deliver exceptional optical performance while offering a cost-effective and lightweight alternative to traditional Germanium glass.

The SiLWIR series provides high transmission and excellent thermal stability across the LWIR spectrum, ensuring reliable, high-quality imaging for demanding applications such as thermal inspection, surveillance, industrial monitoring, and scientific research. Their advanced construction not only enhances image clarity and contrast but also reduces system cost and weight — without compromising on durability or precision.

Built to MidOpt’s renowned world-class manufacturing standards, the SiLWIR filters combine optical excellence, mechanical robustness, and long-term stability, making them a trusted choice for integrators and engineers seeking performance and value in one solution.

Key Features:

  • Specifically designed for LWIR imaging applications (8-12um)
  • Cost-effective, readily available alternative to Germanium optics – and more than two times the strength!
  • Diamond-like carbon (DLC) coated, double-side anti-reflection (AR) coated
  • A peak transmission of >80%
  • Safe in high-temperature applications ~200° C
  • 1150 Knoop Hardness – strong and durable (Twice the breakage resistance of Germanium)
  • Available in sizes up to 8? in diameter
  • High transmission and superior optical uniformity
  • Durable, lightweight silicon construction

Ideal for Applications, including:

  • Thermography
  • Military (DOD)
  • Furnace Inspection
  • Night Vision / Surveillance
  • Mine Detection
  • Medical Imaging
  • Industrial Process Control
  • Firefighting

Discover how MidOpt SiLWIR Filters, available through Multipix Imaging, can enhance the performance and efficiency of your LWIR imaging systems. Contact our Machine Vision Experts today!