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12 July 2023 Straylight minimization in the design of the ERO Narrow Angle Camera
Guilhem Dubroca, Guillaume Singer, Xavier Chauffleur, Michaël Richert, Alain Durieux, Antoine Lecocq
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Proceedings Volume 12777, International Conference on Space Optics — ICSO 2022; 127771E (2023) https://doi.org/10.1117/12.2689281
Event: International Conference on Space Optics — ICSO 2022, 2022, Dubrovnik, Croatia
Abstract
The Mars Sample Return mission is a multiple probe mission to collect rock samples from Mars and bring them to Earth. The Perseverance rover is currently collecting samples on Mars. Tasked with the recovery of the Mars samples in Mars orbit and their return to Earth, the Earth Return Orbiter (ERO) is the last probe of the mission. In order to capture the Orbiting Sample (OS), which contains the Mars rock samples, the ERO will first detect the OS at long distance using its Narrow Angle Camera (NAC). Because the OS will be a faint object of magnitude 12, its detection is a challenge. One part of this challenge is to minimize the straylight caused by the illumination of the camera by much brighter out of field sources, such as the Sun and also the planet Mars. We describe here the design steps taken to minimize straylight, starting with measurement, design principles for the baffle and the objective, then finally simulations and their results.
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Guilhem Dubroca, Guillaume Singer, Xavier Chauffleur, Michaël Richert, Alain Durieux, and Antoine Lecocq "Straylight minimization in the design of the ERO Narrow Angle Camera", Proc. SPIE 12777, International Conference on Space Optics — ICSO 2022, 127771E (12 July 2023); https://doi.org/10.1117/12.2689281
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KEYWORDS
Mars
Baffles
Simulations
Cameras
Design and modelling
Sun
Astronomical imaging
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