BESSEL: A High Strehl Visible Telescopic Test Bed for Planet Finding Coronagraphs

Details BESSEL: A High Strehl Visible Telescopic Test Bed for Planet Finding Coronagraphs BESSEL: A High Strehl Visible Telescopic Test Bed for Planet Finding Coronagraphs

Jun 2007

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=2007lyot.confe..29p&link_type=abstract

Proceedings of the conference In the Spirit of Bernard Lyot: The Direct Detection of Planets and Circumstellar Disks in the 21s

Computer Science

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Scientific paper

We have constructed a high-speed image stabilization system, Bessel, which attaches to an 8-inch refractive telescope at Steward Observatory. The high-speed tip/tilt mirror platform is controlled by a photon-counting camera that allows us to correct the wavefront distortion at a rate exceeding 1 KHz. Bessel has a strehl ratios over 96% at 800 nm when the telescope aperture stopped down to less than the Freid parameter (approximately 50 mm). With this telescopic system, we will characterize the optical vortex coronagraph (OVC). We will report here on our on-telescope performance with Bessel. We welcome other coronagraphic architectures for realistic telescopic characterizations as well.

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