Schwinde, StefanStefanSchwindeMunzert, PeterPeterMunzertShestaeva, SvetlanaSvetlanaShestaevaLeitel, RobertRobertLeitelKleinle, SylkeSylkeKleinleSchröder, SvenSvenSchröder2024-04-162024-04-162023https://publica.fraunhofer.de/handle/publica/46608910.1117/12.26910272-s2.0-85173999123The monitoring of anthropogenic CO2 by satellites (part of Copernicus, the European Union's Earth Observation and Monitoring program) requires a special dispersive spectrometer. As a highly efficient light dispersing element, a Prism-Grating Prism (PG-P) optical element will operate in the program, mentioned above. Anti-reflection (AR) coatings and light blocking apertures are requested to suppress optical losses, to reduce stray light and to shape the beam. Beside the AR-coatings, deposition of "black" aperture as a coating directly on the PG-P element, allows to abstain a mechanical aperture. Thereby, reduced number of elements in the optical setup and therefore reduced payload of the satellite can be achieved. For this purpose, an antireflective coating inside a clear aperture combined with a light blocking and absorbing aperture-coating outside the clear aperture was realized. The developments shown in this contribution were performed for the application wavelength of 1590-1675 nm.enanti-reflectionapertureblackclear apertureCoatingprismconference paper