First On-Sky High Contrast Imaging with an Apodizing Phase Plate (2007)
Kenworthy, Matthew A., Codona, Johanan L., Hinz, Philip M., Angel, J. Roger P., Heinze, Ari, Sivanandam, Suresh
We present the first astronomical observations obtained with an Apodizing Phase Plate (APP). The plate is designed to suppress the stellar diffraction pattern by 5 magnitudes from 2-9 lambda/D over a...
Imaging extrasolar planets by stellar halo suppression in separately-corrected color bands (2004)
Codona, Johanan L., Angel, Roger
Extra-solar planets have not been imaged directly with existing ground or space telescopes because they are too faint to be seen against the halo of the nearby bright star. Most techniques being...
Average Arrival Time of Wave Pulses Through Continuous Random Media, (1998)
Codona,Johanan L., Creamer,Dennis B., Flatte,Stanley M., Frehlich,R. G., Henyey,Frank S.
It is pointed out that a continuous random medium can cause an average advance of the arrival time of a pulse. This advance will occur for unsaturated and partially saturated propagation, but not in...