Keywords:spatial resolution; deformable mirror (DM); wavefront control
Publisher:Pasadena, CA : Jet Propulsion Laboratory, National Aeronautics and Space Administration, 2013
Citation:SPIE Optics and Photonics, San Diego, California, August 25-29, 2013
Abstract:
We present coronagraphic images from the Phase Induced Amplitude Apodization (PIAA) coronagraph on NASA's High Contrast Imaging Testbed (HCIT) at the Jet Propulsion Lab, showing contrasts of 5×10-¹⁰ averaged from 2-4 λ/D, in monochromatic light at 808 nm. In parallel with the coronagraph and its deformable mirror and coronagraphic wavefront control, we also demonstrate a low-order wavefront control system, giving 100× rms suppression of introduced tip/tilt disturbances down to residual levels of 10−³ λ/D. Current limitations, as well as broadband (10% fractional bandpass) preliminary results are discussed.