Experimental Study of a Multispectral Piston Sensing Technology
Nowadays giant segmented telescopes and multiaperture telescopes have grown out of the quest for high-resolution observations in astronomy. One of the major issues is the phasing of such telescopes. A concept of multispectral piston sensing technology is, therefore, re-examined and studied experimen...
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| Format: | Article |
| Language: | English |
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IEEE
2019-01-01
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| Series: | IEEE Photonics Journal |
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| Online Access: | https://ieeexplore.ieee.org/document/8706534/ |
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| _version_ | 1839644942256832512 |
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| author | Li Dong Haotong Ma Qi Peng Ge Ren Bo Qi Shanchao Liu Zongliang Xie |
| author_facet | Li Dong Haotong Ma Qi Peng Ge Ren Bo Qi Shanchao Liu Zongliang Xie |
| author_sort | Li Dong |
| collection | DOAJ |
| description | Nowadays giant segmented telescopes and multiaperture telescopes have grown out of the quest for high-resolution observations in astronomy. One of the major issues is the phasing of such telescopes. A concept of multispectral piston sensing technology is, therefore, re-examined and studied experimentally for the first time. Based on the phase-shifting “Telescope-Interferometer” technology and multispectral information, the multispectral piston sensing technology was assumed to be feasible with the segmented telescopes and multiaperture telescopes. In this paper, the optical scheme for this method has been designed and realized. Experimental tests have been carried out and demonstrated that the method is effective for piston sensing in a large capture range with high-precision despite some instrument-related limitations that can be eliminated. In our tests, the shortest coherent length of the three working spectrums we chose was less than 17.5 μm. Results show that the method successfully handled an amplitude of correction of about ±8 μm with an accuracy of about λ/30 (λ = 535 nm) RMS in our tests, and we can foresee that the capture range can be enlarged if we choose working spectrums with larger coherent lengths. |
| format | Article |
| id | doaj-art-7a15318b51c049c8975853d4feabbfe3 |
| institution | Matheson Library |
| issn | 1943-0655 |
| language | English |
| publishDate | 2019-01-01 |
| publisher | IEEE |
| record_format | Article |
| series | IEEE Photonics Journal |
| spelling | doaj-art-7a15318b51c049c8975853d4feabbfe32025-07-01T23:42:45ZengIEEEIEEE Photonics Journal1943-06552019-01-0111311010.1109/JPHOT.2019.29150188706534Experimental Study of a Multispectral Piston Sensing TechnologyLi Dong0https://orcid.org/0000-0002-8150-3544Haotong Ma1https://orcid.org/0000-0001-8359-370XQi Peng2Ge Ren3Bo Qi4https://orcid.org/0000-0003-2142-8113Shanchao Liu5Zongliang Xie6https://orcid.org/0000-0002-8553-2537Key Laboratory of Optical Engineering, Chinese Academy of Sciences, Chengdu, ChinaKey Laboratory of Optical Engineering, Chinese Academy of Sciences, Chengdu, ChinaKey Laboratory of Optical Engineering, Chinese Academy of Sciences, Chengdu, ChinaKey Laboratory of Optical Engineering, Chinese Academy of Sciences, Chengdu, ChinaKey Laboratory of Optical Engineering, Chinese Academy of Sciences, Chengdu, ChinaKey Laboratory of Optical Engineering, Chinese Academy of Sciences, Chengdu, ChinaKey Laboratory of Optical Engineering, Chinese Academy of Sciences, Chengdu, ChinaNowadays giant segmented telescopes and multiaperture telescopes have grown out of the quest for high-resolution observations in astronomy. One of the major issues is the phasing of such telescopes. A concept of multispectral piston sensing technology is, therefore, re-examined and studied experimentally for the first time. Based on the phase-shifting “Telescope-Interferometer” technology and multispectral information, the multispectral piston sensing technology was assumed to be feasible with the segmented telescopes and multiaperture telescopes. In this paper, the optical scheme for this method has been designed and realized. Experimental tests have been carried out and demonstrated that the method is effective for piston sensing in a large capture range with high-precision despite some instrument-related limitations that can be eliminated. In our tests, the shortest coherent length of the three working spectrums we chose was less than 17.5 μm. Results show that the method successfully handled an amplitude of correction of about ±8 μm with an accuracy of about λ/30 (λ = 535 nm) RMS in our tests, and we can foresee that the capture range can be enlarged if we choose working spectrums with larger coherent lengths.https://ieeexplore.ieee.org/document/8706534/Phase measurementphased-array imaging systemsphase shiftimaging systems. |
| spellingShingle | Li Dong Haotong Ma Qi Peng Ge Ren Bo Qi Shanchao Liu Zongliang Xie Experimental Study of a Multispectral Piston Sensing Technology IEEE Photonics Journal Phase measurement phased-array imaging systems phase shift imaging systems. |
| title | Experimental Study of a Multispectral Piston Sensing Technology |
| title_full | Experimental Study of a Multispectral Piston Sensing Technology |
| title_fullStr | Experimental Study of a Multispectral Piston Sensing Technology |
| title_full_unstemmed | Experimental Study of a Multispectral Piston Sensing Technology |
| title_short | Experimental Study of a Multispectral Piston Sensing Technology |
| title_sort | experimental study of a multispectral piston sensing technology |
| topic | Phase measurement phased-array imaging systems phase shift imaging systems. |
| url | https://ieeexplore.ieee.org/document/8706534/ |
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