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Experimental Validation of Advanced Dispersed Fringe Sensing (ADFS) Algorithm Using Advanced Wavefront Sensing and Correction Testbed (AWCT)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 for JWST.An Advanced Dispersed Fringe Sensing (ADFS) algorithm is recently developed to improve the performance and robustness of previous DFS algorithms with better accuracy and unique solution. The first part of the paper introduces the basic ideas and the essential features of the ADFS algorithm and presents the some algorithm sensitivity study results. The second part of the paper describes the full details of algorithm validation process through the advanced wavefront sensing and correction testbed (AWCT): first, the optimization of the DFS hardware of AWCT to ensure the data accuracy and reliability is illustrated. Then, a few carefully designed algorithm validation experiments are implemented, and the corresponding data analysis results are shown. Finally the fiducial calibration using Range-Gate-Metrology technique is carried out and a <10nm or <1% algorithm accuracy is demonstrated.
Document ID
20130000308
Document Type
Conference Paper
External Source(s)
Authors
Wang, Xu (Jet Propulsion Lab., California Inst. of Tech. Pasadena, CA, United States)
Shi, Fang (Jet Propulsion Lab., California Inst. of Tech. Pasadena, CA, United States)
Sigrist, Norbert (Jet Propulsion Lab., California Inst. of Tech. Pasadena, CA, United States)
Seo, Byoung-Joon (Jet Propulsion Lab., California Inst. of Tech. Pasadena, CA, United States)
Tang, Hong (Jet Propulsion Lab., California Inst. of Tech. Pasadena, CA, United States)
Bikkannavar, Siddarayappa (Jet Propulsion Lab., California Inst. of Tech. Pasadena, CA, United States)
Basinger, Scott (Jet Propulsion Lab., California Inst. of Tech. Pasadena, CA, United States)
Lay, Oliver (Jet Propulsion Lab., California Inst. of Tech. Pasadena, CA, United States)
Date Acquired
August 27, 2013
Publication Date
July 1, 2012
Subject Category
Instrumentation and Photography
Meeting Information
SPIE Astronomical Telescopes+Instrumentation(Amsterdam)
Funding Number(s)
WBS: WBS 104020.01.01
Distribution Limits
Public
Copyright
Other
Keywords
Dispersed Fringe Sensing (DFS)
Advanced Dispersed Fringe Sensing (ADFS)
advanced wavefront sensing and correction testbed (AWCT)