From Event: SPIE Optical Engineering + Applications, 2017
The Lightweight Asymmetry and Magnetism Probe (LAMP) is a micro-satellite based mission concept for soft X-ray polarimetry at 250 eV with a large aperture but a short focal length. Due to the very low energy response of the gas pixel detector (GPD) used in LAMP, the stray light must be extremely attenuated. However, a long baffle is not favored for the micro-satellite with a limited geometry. In this paper, we propose a novel design having a short optical baffle but with high efficiency suppressing stray lights. For the optical aperture with a diameter of 700 mm used in LAMP, a short baffle of just 150 mm long can reduce the solar stray light by a factor better than 10-4 at the incidence angle larger than 60°, which is verified by simulations with TracePro ray-tracing software. This design meets the requirement for LAMP and the design concept should be helpful for other optical/UV/X-ray telescopes.
Yujie Xing, Zhanshan Wang, Wenbi Li, Jun Yu, and Hua Feng, "Design and simulations of a short optical baffle for the Lightweight Asymmetry and Magnetism Probe (LAMP)," Proc. SPIE 10399, Optics for EUV, X-Ray, and Gamma-Ray Astronomy VIII, 103990K (Presented at SPIE Optical Engineering + Applications: August 08, 2017; Published: 29 August 2017); https://doi.org/10.1117/12.2272077.
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