Transmission of eGLS glass
The enhanced infrared performance of a new modified Gallium Lanthium Sulphide (GLS) chalcogenide glass family is illustrated in this transmission curve. Details of the modification and the range transmission achieved are in Dan Hewak’s latest presentation.
The strong bonding and high glass transition temperature that characterise GLS glasses are maintained in this formulation and are anticipated to yield the enhanced mechanical, thermal and chemical durability seen in previous GLS glasses relative to other chalcogenide glasses. Further improvement of the loss in the infrared band and extended characterisation is anticipated in the coming months.
Building on ChAMP, the Optoelectronics Research Centre (ORC) and Plasma App Ltd are collaborating in a one-year £150k feasibility study exploring novel thin film coating technology and applications for Gallium Lanthanum Sulphide (GLS) Chalcogenide glass
With a new glass formulation, ChAMP has extended the transmission of high durability non-toxic chalcogenide glasses from the visible to the thermal infrared LWIR band
Visible imaging through extended GLS glass
Simultaneous thermal imaging and visible edge recognition imaging through extended GLS glass
Images show a thermal LWIR image from 7-14 microns being simultaneously transmitted through the same glass as the visible image. With a glass formulation specifically chosen for its strong covalent bonding this new glass also has a transition temperature of over 450C, more than twice as high as other common chalcognides. This makes extended GLS physically, mechanically and chemically robust and compatible with molding and diamond turning. Opening the way to a new generation of light weight single optic simultaneous multiband visible, short-wave, mid-wave and long-wave imaging camera systems for applications in security, industrial and medical sensing.
Prof Dan Hewak, University of Southampton
Prof Dan Hewak, presented the latest ground breaking developments on chalcogenide glasses developed in ChAMP on Wednesday 28 September 2016 at SPIE Security + Defence and Remote Sensing meeting in Edinburgh. 17:10 paper 9989-2
Dan’s full presentation on next generation chalcogenide glasses is available here including details of the new extended GLS glass with transmission to 14 microns.