High Contrast and Extreme AO Experiments on the Palomar Hale Telescope

Details High Contrast and Extreme AO Experiments on the Palomar Hale Telescope High Contrast and Extreme AO Experiments on the Palomar Hale Telescope

Dec 2006

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=2006aas...20913006s&link_type=abstract

2007 AAS/AAPT Joint Meeting, American Astronomical Society Meeting 209, #130.06; Bulletin of the American Astronomical Society,

Physics

Optics

Scientific paper

A number of extreme adaptive optics (ExAO) and high contrast experiments are either underway or in development at JPL for deployment to Palomar’s Hale telescope. First, by reimaging a clear, off-axis telescope subaperture onto an adaptive optics (AO) system’s deformable mirror, ExAO performance levels can be achieved with existing systems. We have recently implemented such a system, and have already used it on the telescope to achieve stellar Strehl ratios exceeding 90% in the infrared. We have also achieved good AO correction to wavelengths as short as the B band, where a binary separated by 0.34 arc sec was very well resolved. We have also carried out high-contrast coronagraphy experiments with a four-quadrant phase mask coronagraph, where a 100:1 stellar rejection was achieved. Future plans include a variety of additional coronagraphic tests, as well as the deployment of a dual aperture fiber nuller.

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