Source:http://linkedlifedata.com/resource/pubmed/id/16708083
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| Predicate | Object |
|---|---|
| rdf:type | |
| pubmed:issue |
15
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| pubmed:dateCreated |
2006-5-18
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| pubmed:abstractText |
We develop an adaptive-optics system based on a Mach-Zehnder radial shearing interferometer with liquid-crystal-device (LCD) phase-shift interferometry (PSI). Using accurate phase calibration and transient nematic driving of the LCD, the developed three-step PSI procedure can be achieved in a time of 5 ms. The proposed Mach-Zehnder radial shearing PSI method reconstructs the phase information using a digital signal processor (DSP). The DSP then computes appropriate control signals to drive a deformable mirror in such a way as to eliminate the wavefront distortion. The current adaptive-optics system is capable of suppressing low-frequency thermal disturbances with a signal-to-noise ratio improvement of more than 20 dB and a steady-state phase error of less than 0.02pi root mean square when the control loop is operated at a frequency of 30 Hz.
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| pubmed:language |
eng
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| pubmed:journal | |
| pubmed:status |
PubMed-not-MEDLINE
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| pubmed:month |
May
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| pubmed:issn |
0003-6935
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| pubmed:author | |
| pubmed:issnType |
Print
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| pubmed:day |
20
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| pubmed:volume |
45
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| pubmed:owner |
NLM
|
| pubmed:authorsComplete |
Y
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| pubmed:pagination |
3409-14
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| pubmed:year |
2006
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| pubmed:articleTitle |
Adaptive-optics system with liquid-crystal phase-shift interferometer.
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| pubmed:affiliation |
Department of Mechanical Engineering, National Central University, Chung-Li, Taiwan.
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| pubmed:publicationType |
Journal Article
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