Benjamin C. Platt

TL;DR: In this paper, the TMT primary mirror segment passive-support system has been modified to reduce gravity print-through and thermal distortion effects, which results in improved optical performance when subject to varying gravity fields.

TL;DR: In this paper, the basic concepts for interferometric measurement of dihedral angle errors in retroreflectors from a practical point of view are discussed and some results of the recent joint work between JPL and CSIRO are discussed.

TL;DR: In this article, the authors used adaptive optics techniques to correct wave front aberrations caused by atmospheric turbulence and enable near-diffraction-limited performance of the receiving telescope, which facilitates spatial filtering, and allows the receiver field-of-view and hence the noise from the sky background to be reduced.

TL;DR: In this article, the authors built and field tested a multiple guide star tomograph with four Shack-Hartmann wavefront sensors, which can predict the wavefront on the fourth sensor channel estimated using wavefront information from the other three channels using synchronously recorded data.

TL;DR: In this paper, the authors describe the current performance of an adaptive optics testbed for optical communication, which allows for simulation of night and day-time observing on a 1 meter telescope with a 97 actuator deformable mirror.