From Event: SPIE Optical Engineering + Applications, 2017
The High Contrast Spectroscopy Testbed for Segmented Telescopes (HCST) at Caltech is aimed at filling gaps in technology for future exoplanet imagers and providing the U.S. community with an academic facility to test components and techniques for high contrast imaging with future segmented ground-based telescope (TMT, E-ELT) and space-based telescopes (HabEx, LUVOIR). The HCST will be able to simulate segmented telescope geometries up to 1021 hexagonal segments and time-varying external wavefront disturbances. It also contains a wavefront corrector module based on two deformable mirrors followed by a classical 3-plane single-stage corona- graph (entrance apodizer, focal-plane mask, Lyot stop) and a science instrument. The back-end instrument will consist of an imaging detector and a high-resolution spectrograph, which is a unique feature of the HCST. The spectrograph instrument will utilize spectral information to characterize simulated planets at the photon-noise limit, measure the chromaticity of new optimized coronagraph and wavefront control concepts, and test the overall scientific functions of high-resolution spectrographs on future segmented telescopes.
J. R. Delorme, D. Mawet, J. Fucik, J. K. Wallace, G. Ruane, N. Jovanovic, N. S. Klimovich, J. D. Llop Sayson, R. Zhang, Y. Xin, R. Riddle, R. Dekany, J. Wang, E. Choquet, W. Xuan, D. Echeverri, M. Randolph, G. Vasisht, and B. Mennesson, "High-contrast spectroscopy testbed for segmented telescopes," Proc. SPIE 10400, Techniques and Instrumentation for Detection of Exoplanets VIII, 104000X (Presented at SPIE Optical Engineering + Applications: August 09, 2017; Published: 22 January 2018); https://doi.org/10.1117/12.2274893.
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Study of self-shadowing effect as a simple means to realize nanostructured thin films and layers with special attentions to birefringent obliquely deposited thin films and photo-luminescent porous silicon