Norbert Sigrist

The James Webb Space Telescope Mission: Optical Telescope Element Design, Development, and Performance

Michael W. McElwain, Lee D. Feinberg, Marshall D. Perrin, Mark Clampin et autres

Abstract The James Webb Space Telescope (JWST) is a large, infrared space telescope that has recently started its science program which will enable breakthroughs in astrophysics and planetary science. Notably, JWST will provide the very first observations of the earliest luminous objects …

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The James Webb Space Telescope Mission: Optical Telescope Element Design, Development, and Performance

Michael W. McElwain, Lee D. Feinberg, Marshall D. Perrin, Mark Clampin et autres

The James Webb Space Telescope (JWST) is a large, infrared space telescope that has recently started its science program which will enable breakthroughs in astrophysics and planetary science. Notably, JWST will provide the very first observations of the earliest luminous objects in …

The Habitable Exoplanet Observatory (HabEx) Mission Concept Study Final Report

B. Scott Gaudi, Sara Seager, Bertrand P. Mennesson, A. Kiessling et autres

The Habitable Exoplanet Observatory, or HabEx, has been designed to be the Great Observatory of the 2030s. For the first time in human history, technologies have matured sufficiently to enable an affordable space-based telescope mission capable of discovering and characterizing Earthlike planets …

Experimental validation of Advanced Dispersed Fringe Sensing (ADFS) algorithm using Advanced Wavefront Sensing and Correction Testbed (AWCT)

Xu Wang, Fang Shi, Norbert Sigrist, Byoung-Joon Seo et autres

Large aperture telescope commonly features segment mirrors and a coarse phasing step is needed to bring these individual segments into the fine phasing capture range. Dispersed Fringe Sensing (DFS) is a powerful coarse phasing technique and its alteration is currently being used …

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Advanced Dispersed Fringe Sensing Algorithm for Coarse Phasing Segmented Mirror Telescopes

Joshua A. Spechler, Daniel Joshua Hoppe, Norbert Sigrist, Fang Shi et autres

Segment mirror phasing, a critical step of segment mirror alignment, requires the ability to sense and correct the relative pistons between segments from up to a few hundred microns to a fraction of wavelength in order to bring the mirror system to …

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General MACOS Interface for Modeling and Analysis for Controlled Optical Systems

Norbert Sigrist, Scott A. Basinger, David C. Redding

The General MACOS Interface (GMI) for Modeling and Analysis for Controlled Optical Systems (MACOS) enables the use of MATLAB as a front-end for JPL s critical optical modeling package, MACOS. MACOS is JPL s in-house optical modeling software, which has proven to …

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Dispersed Fringe Sensing Analysis - DFSA

Norbert Sigrist, Fang Shi, David C. Redding, Scott A. Basinger et autres

Dispersed Fringe Sensing (DFS) is a technique for measuring and phasing segmented telescope mirrors using a dispersed broadband light image. DFS is capable of breaking the monochromatic light ambiguity, measuring absolute piston errors between segments of large segmented primary mirrors to tens …

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RxGen General Optical Model Prescription Generator

Norbert Sigrist

RxGen is a prescription generator for JPL's in-house optical modeling software package called MACOS (Modeling and Analysis for Controlled Optical Systems), which is an expert optical analysis software package focusing on modeling optics on dynamic structures, deformable optics, and controlled optics. The …

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Advanced DFS: a dispersed fringe sensing algorithm insensitive to small calibration errors

Joshua A. Spechler, Daniel Joshua Hoppe, Norbert Sigrist, Fang Shi et autres

Dispersed Fringe Sensing (DFS) is an elegant method of coarse phasing segmented mirrors. DFS performance accuracy is dependent upon careful calibration of the system as well as other factors such as internal optical alignment, system wavefront errors, and detector quality. Novel improvements …

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Investigation of Thirty Meter Telescope wavefront maintenance using low-order Shack-Hartmann wavefront sensors to correct for thermally-induced misalignments

Carl R. Nissly, Byoung-Joon Seo, Mitchell Troy, George Z. Angeli et autres

We evaluate how well the performance of the Thirty Meter Telescope (TMT) can be maintained against thermally induced errors during a night of observation. We first demonstrate that using look-up-table style correction for TMT thermal errors is unlikely to meet the required …

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Analysis of normalized point source sensitivity as a performance metric for large telescopes

Byoung-Joon Seo, Carl R. Nissly, George Z. Angeli, Brent L. Ellerbroek et autres

We investigate a new metric, the normalized point source sensitivity (PSSN), for characterizing the seeing-limited performance of large telescopes. As the PSSN metric is directly related to the photometric error of background limited observations, it represents the efficiency loss in telescope observing …

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

Byoung-Joon Seo, Carl R. Nissly, George Z. Angeli, D. G. Macmynowski et autres

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 …

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