Blank Materials for Infrared Optics
Umicore Infrared Optics offers built-to-print lens and assembly design as well as blanks made out of GASIR®, a chalcogenide glass with a much wider spectral range than Germanium as well as a dn/dt that is 8 times as low.
Umicore's GASIR® chalcogenide glass is an ideal material for both high-performance infrared imaging systems and high-volume commercial applications. GASIR® has a dn/dt 8 times lower than germanium and a much wider spectral range covering NIR, MWIR and LWIR. GASIR® can be finished with traditional manufacturing technologies as well as by molding.
Coated GASIR®1 has a wider transmission spectrum than germanium, and GASIR® blanks are less costly and more stably priced than germanium blanks.
GASIR® - optics for new and existing applications
A unique molding process allows the manufacture of finished, spherical, aspherical and diffractive lens geometry in medium to large volume production runs with a competitive price-performance ratio. For low to medium volume needs GASIR® can be manufactured with polishing or diamond turning.
Compared with germanium, the traditional infrared material, GASIR® offers a wider transmission spectrum and much better possibilities to athermalize optics.
Umicore offers GASIR® both as blank material, lens or in off-the-shelf infrared lenses.
GASIR®'s key advantages are:
- More stable pricing than germanium with the possibility for long term fix pricing
- Wider spectral range than germanium. GASIR® is transparent from 0.8 µm up to 16 µm
- 8 times lower change of refractive index with temperature than germanium, allowing simple athermalized design
- Molding process allowing for high volume, cost effective optics
Potential application fields for GASIR® include:
- Automotive night vision and sensing
- Security and surveillance
- Thermography and predictive maintenance
- Fire fighting
- Smart sensing