Knight Optical's Calomel Infrared Polarisers: Precision Redefined

11 Jul 2025

In the dynamic landscape of MWIR and LWIR applications, Knight Optical introduces its game-changing Calomel Infrared Polarisers, meticulously engineered to set new standards in polarisation excellence. Tailored for discerning innovators, these polarisers redefine standards, marrying advanced technology with flawless performance.

Dive into a world where innovation meets precision, designed to transform your projects within the 5-17µm transmission range. Whether you're seeking Wollaston or Glan-Foucault types, we've got you covered, offering robust birefringence (Δn=0.683) and an exceptional extinction ratio.

Precision shouldn't be complicated. Our Calomel polarisers are seamlessly mounted in 360° rotational mounts, ensuring not just performance but also ease of handling and alignment.

Technical Specifications: 

Material: Calomel
Dimension tolerance: ±0.2
Flatness: < 0.3λ
Coating: Uncoated
Mount: Mounted
Scratch/dig: < 40/20

Every product undergoes rigorous testing in our cutting-edge metrology lab, ensuring it matches the most demanding specifications. Our QA team meticulously checks for imperfections, guaranteeing top-tier quality before dispatch.

Explore beyond the standard with 15x15mm apertures and delve into the possibilities of AR coatings for 3-5µm and 8-10µm wavebands. Your projects are unique, and our options are crafted to match your vision.

We are committed to providing our customers with both high-quality products and excellent service. Contact our UK and US teams today and experience true precision, quality and innovation.