Knight Optical offers SCHOTT infrared chalcogenide windows manufactured from their IRG glass range. Chalcogenide glass offers broad transmission wavebands covering SWIR, MWIR, and LWIR thermal wavebands. It makes a cost-effective alternative to germanium for many applications, offering high performance for demanding applications.

Benefits of SCHOTT infrared chalcogenide glass:

• IRG22 transmits as low as 0.7 µm and up to LWIR. 
• Low dn/dt – a low variation in refractive index with temperature variation

• Low dispersion with high colour correction

• Lower density to common infrared materials such as germanium

Precaution: Please note that SCHOTT IRG glass should be handled with care due to its potential toxicity (please refer to each materials SDS, however IRG27 is classed as toxic), sensitivity to moisture, and relatively soft surface. Improper handling can lead to contamination, surface degradation, or scratches, so using gloves, keeping components dry, and avoiding mechanical damage is essential to maintain performance and safety. Please store in a low humidity environment and avoid long exposure to UV light.