JPL Technical Report Server

Investigation of primary mirror segment’s residual errors for the Thirty Meter Telescope

Show simple item record Seo, Byoung-Joon Nissly, Carl Angeli, George MacMynowski, Doug Sigrist, Norbert Troy, Mitchell Williams, Eric 2014-09-03T17:44:27Z 2014-09-03T17:44:27Z 2009-08-02
dc.identifier.citation SPIE Optical Engineering and Applications, San Diego, California, August 2-6, 2009 en_US
dc.identifier.clearanceno 09-2259
dc.description.abstract The primary mirror segment aberrations after shape corrections with warping harness have been identified as the single largest error term in the Thirty Meter Telescope (TMT) image quality error budget. In order to better understand the likely errors and how they will impact the telescope performance we have performed detailed simulations. We first generated unwarped primary mirror segment surface shapes that met TMT specifications. Then we used the predicted warping harness influence functions and a Shack-Hartmann wavefront sensor model to determine estimates for the 492 corrected segment surfaces that make up the TMT primary mirror. Surface and control parameters, as well as the number of subapertures were varied to explore the parameter space. The corrected segment shapes were then passed to an optical TMT model built using the Jet Propulsion Laboratory (JPL) developed Modeling and Analysis for Controlled Optical Systems (MACOS) ray-trace simulator. The generated exit pupil wavefront error maps provided RMS wavefront error and image-plane characteristics like the Normalized Point Source Sensitivity (PSSN). The results have been used to optimize the segment shape correction and wavefront sensor designs as well as provide input to the TMT systems engineering error budgets. en_US
dc.description.sponsorship NASA/JPL en_US
dc.language.iso en_US en_US
dc.publisher Pasadena, CA : Jet Propulsion Laboratory, National Aeronautics and Space Administration, 2009 en_US
dc.subject warping harness en_US
dc.title Investigation of primary mirror segment’s residual errors for the Thirty Meter Telescope en_US
dc.type Presentation en_US

Files in this item

This item appears in the following Collection(s)

Show simple item record



My Account