Very long stripe-filters for a multispectral detector

D. Laubier, Renaud Mercier Ythier, Georges Otrio
2017 International Conference on Space Optics — ICSO 2000  
2) SAGEM Optique & Ingéniérie -produits REOSC 61, rue Salvador Allende 92751 NANTERRE cedex RESUME -Afin de simplifier les concepts instrumentaux, le Cnes a entrepris le développement d'un nouveau détecteur multispectral, comportant 4 lignes de 6 000 pixels de 13 μm et un filtre allumette devant chacune d'elles. Atmel a réalisé les démonstrateurs de détecteurs, et Sagem/Reosc les filtres. Deux voies d'assemblage ont été évaluées : la première directement sur le boîtier (Atmel), la seconde par
more » ... ), la seconde par collage optique sur la fenêtre de ce dernier (Seso). On présentera ici les résultats de l'étude comparative technologique, ainsi que les performances des filtres allumettes. Le concept d'assemblage impose certaines contraintes sur le dimensionnement des filtres et des détecteurs, en particulier en ce qui concerne la sensibilité à la lumière parasite. On en donnera les principes, et on comparera les résultats de modélisation aux mesures. ABSTRACT -In order to simplify instrument design, a new linear area CCD sensor has been developed under CNES responsibility. This detector has four lines 6000 13-μm square pixels long with four stripe filters, one in front of each of them. The detector itself was manufactured and mounted by ATMEL, and the filters were made by SAGEM/REOSC. Assembly was done in two ways, one by ATMEL, the other by SESO. CNES was responsible for the overall design and mechanical/optical interfaces. This paper reports the optical part of this work, including filters placement strategy and line spacing. It will be shown how these two features are closely linked to straylight performance. First, a trade-off study was conducted between several concepts: the results of this study will be presented, as well as the filter design and manufacturing results. They show good transmission and excellent rejection. Final performance of the complete prototypes has been measured, and it will be compared to theoretical models.
doi:10.1117/12.2307911 fatcat:4s5p4hipf5fehmtxvn5pm3oopq