The performance of certain optical devices strongly depends on their ability to avoid and/or eliminate stray light. Stray light reduction is an important issue, particularly for space-borne astronomical instruments, where it can notably affect both geometric and radiometric image quality. To prevent light originating from outside the desired field of view of the instrument, baffles are typically arranged around the optical axis. As an alternative, a number of companies have developed black coatings to cover all mechanical surfaces close to the optical beam.
The Luxembourg Institute of Science and Technology (LIST) has developed a new type of coatings made of a ceramic composite material .
Also referred to as an “advanced cermet”, this ceramic composite corresponds to a carbon-pigmented cermet. It comprises a ceramic matrix with embedded carbone-metal complex nanoparticles.
The advanced cermet coating provides a number of benefits:
Aside from optical instruments, this advanced cermet black coating can be used for:
Patent application filed on June 29, 2015 under reference LU92757 and international patent application filed on June 28, 2016. Published under reference WO201701405 .