| タイトル | Direct Measurement of Large, Diffuse, Optical Structures |
| 本文（外部サイト） | http://hdl.handle.net/2060/20040171459 |
| 著者（英） | Feinberg, Lee; Saif, Babak N.; Atkinson, C.; Wyant, J. C.; Keski-Kuha, Ritva |
| 著者所属（英） | NASA Goddard Space Flight Center |
| 発行日 | 2004-01-01 |
| 言語 | eng |
| 内容記述 | Digital Speckle Pattern Interferometry (DSPI) is a well-established method for the measurement of diffuse objects in experimental mechanics. DSPIs are phase shifting interferometers. Three or four bucket temporal phase shifting algorithms are commonly used to provide phase shifting. These algorithms are sensitive to vibrations and can not be used to measure large optical structures far away from the interferometer. In this research a simultaneous phase shifted interferometer, PhaseCam product of 4D Technology Corporation in Tucson Arizona, is modified to be a Simultaneous phase shifted Digital Speckle Pattern Interferometer (SDSPI). Repeatability, dynamic range, and accuracy of the SDSPI are characterized by measuring a 5 cm x 5 cm carbon fiber coupon. |
| NASA分類 | Instrumentation and Photography |
| 権利 | Copyright, Distribution as joint owner in the copyright |
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