Widefield heterodyne interferometry using a custom CMOS modulated light camera
In this paper a method of taking widefield heterodyne inter- ferograms using a prototype modulated light camera is described. This custom CMOS modulated light camera (MLC) uses analogue quadrature demodulation at each pixel to output the phase and amplitude of the modu- lated light as DC voltages. T...
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| Format: | Article |
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Optical Society of America
2011
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| Online Access: | https://eprints.nottingham.ac.uk/2870/ |
| _version_ | 1848790896612474880 |
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| author | Patel, Rikesh Achamfuo-Yeboah, Samuel Light, Roger Clark, Matt |
| author_facet | Patel, Rikesh Achamfuo-Yeboah, Samuel Light, Roger Clark, Matt |
| author_sort | Patel, Rikesh |
| building | Nottingham Research Data Repository |
| collection | Online Access |
| description | In this paper a method of taking widefield heterodyne inter- ferograms using a prototype modulated light camera is described. This custom CMOS modulated light camera (MLC) uses analogue quadrature demodulation at each pixel to output the phase and amplitude of the modu- lated light as DC voltages. The heterodyne interference fringe patterns are generated using an acousto-optical frequency shifter (AOFS) in an arm of a Mach-Zehnder interferometer. Widefield images of fringe patterns acquired using the prototype MLC are presented. The phase can be measured to an accuracy of ±6.6◦. The added value of this method to acquire widefield images are discussed along with the advantages. |
| first_indexed | 2025-11-14T18:19:54Z |
| format | Article |
| id | nottingham-2870 |
| institution | University of Nottingham Malaysia Campus |
| institution_category | Local University |
| last_indexed | 2025-11-14T18:19:54Z |
| publishDate | 2011 |
| publisher | Optical Society of America |
| recordtype | eprints |
| repository_type | Digital Repository |
| spelling | nottingham-28702020-05-04T16:31:39Z https://eprints.nottingham.ac.uk/2870/ Widefield heterodyne interferometry using a custom CMOS modulated light camera Patel, Rikesh Achamfuo-Yeboah, Samuel Light, Roger Clark, Matt In this paper a method of taking widefield heterodyne inter- ferograms using a prototype modulated light camera is described. This custom CMOS modulated light camera (MLC) uses analogue quadrature demodulation at each pixel to output the phase and amplitude of the modu- lated light as DC voltages. The heterodyne interference fringe patterns are generated using an acousto-optical frequency shifter (AOFS) in an arm of a Mach-Zehnder interferometer. Widefield images of fringe patterns acquired using the prototype MLC are presented. The phase can be measured to an accuracy of ±6.6◦. The added value of this method to acquire widefield images are discussed along with the advantages. Optical Society of America 2011-11-15 Article PeerReviewed Patel, Rikesh, Achamfuo-Yeboah, Samuel, Light, Roger and Clark, Matt (2011) Widefield heterodyne interferometry using a custom CMOS modulated light camera. Optics Express, 19 (24). pp. 24546-24556. ISSN 1094-4087 http://www.opticsinfobase.org/oe/abstract.cfm?uri=oe-19-24-24546 doi:10.1364/OE.19.024546 doi:10.1364/OE.19.024546 |
| spellingShingle | Patel, Rikesh Achamfuo-Yeboah, Samuel Light, Roger Clark, Matt Widefield heterodyne interferometry using a custom CMOS modulated light camera |
| title | Widefield heterodyne interferometry using a custom CMOS modulated light camera |
| title_full | Widefield heterodyne interferometry using a custom CMOS modulated light camera |
| title_fullStr | Widefield heterodyne interferometry using a custom CMOS modulated light camera |
| title_full_unstemmed | Widefield heterodyne interferometry using a custom CMOS modulated light camera |
| title_short | Widefield heterodyne interferometry using a custom CMOS modulated light camera |
| title_sort | widefield heterodyne interferometry using a custom cmos modulated light camera |
| url | https://eprints.nottingham.ac.uk/2870/ https://eprints.nottingham.ac.uk/2870/ https://eprints.nottingham.ac.uk/2870/ |