The small-ELF project: toward an ultra-large coronagraphic optical receiver

Bibcode
2022SPIE12182E..0GK
DOI
10.1117/12.2629645
Kuhn, Jeff; Capsal, Jean-Fabien; Cunnyngham, Ian; Langlois, Maud; Lewis, Kevin; Lodieu, Nicolas; Moretto, Gil; Rebolo, Rafael; Ritter, Joe; Swindle, Ryan; Zhou, Ye; Jefferies, Stuart; Thetprapi, Kritsadi; Audigier, David; Fletcher, Justin
Bibliographical reference

Ground-based and Airborne Telescopes IX

Advertised on:
8
2022
Number of authors
15
IAC number of authors
2
Citations
0
Refereed citations
0
Description
The small ExoLife Finder (sELF) telescope is a 3.4m diameter fixed pupil tracking Fizeau interferometer. Its design relies on several new technologies the ELF-PLANETS consortium has championed that will enable large narrow-field optical coronagraphic direct imaging. These distinguish it from other segmented aperture telescopes by its light weight, low cost, and its capability to create a coronagraphic point spread function with the telescope pupil, ahead of the secondary optics. This diffractive control emphasizes high dynamic range imaging in the presence of a bright central star in a narrow field-of-view. Its optomechanical design uses elements of tensegrity combined with thin (2mm thick by 0.5m diameter) off-axis parabola segments to decrease both the optical payload and mechanical structural mass. The sELF optomechanical design has been completed and contracts for construction in the Canary Islands will be tendered during the 1st quarter of 2023
Type
Non-refereed

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