| Autor: |
James C. Wyant, Neal Brock, Michael North-Morris, Brad Kimbrough, James E. Millerd, John R. Hayes |
| Rok vydání: |
2017 |
| Předmět: |
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| Zdroj: |
International Conference on Space Optics — ICSO 2006. |
| Popis: |
The largest limitation of phase-shifting interferometry for optical testing is the sensitivity to the environment, both vibration and air turbulence. An interferometer using temporal phase-shifting is very sensitive to vibration because the various phase shifted frames of interferometric data are taken at different times and vibration causes the phase shifts between the data frames to be different from what is desired. Vibration effects can be reduced by taking all the phase shifted frames simultaneously and turbulence effects can be reduced by averaging many measurements. There are several techniques for simultaneously obtaining several phase-shifted interferograms and this paper will discuss two such techniques: 1) Simultaneous phase-shifting interferometry on a single detector array (PhaseCam) and 2) Micropolarizer phase-shifting array. The application of these techniques for the testing of large optical components, measurement of vibrational modes, the phasing of segmented optical components, and the measurement of deformations of large diffuse structures is described. |
| Databáze: |
OpenAIRE |
| Externí odkaz: |
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