Multi-exposure laser speckle contrast imaging using a high frame rate CMOS sensor with a field programmable gate array
A system has been developed in which multi-exposure Laser Speckle Contrast Imaging (LSCI) is implemented using a high frame rate CMOS imaging sensor chip. Processing is performed using a Field Programmable Gate Array (FPGA). The system allows different exposure times to be simulated by accumulating...
| Main Authors: | , , , , |
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| Format: | Article |
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Optical Society of America
2015
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| Online Access: | https://eprints.nottingham.ac.uk/45765/ |
| _version_ | 1848797190134169600 |
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| author | Sun, Shen Hayes-Gill, Barrie R. He, Diwei Zhu, Yiqun Morgan, Stephen P. |
| author_facet | Sun, Shen Hayes-Gill, Barrie R. He, Diwei Zhu, Yiqun Morgan, Stephen P. |
| author_sort | Sun, Shen |
| building | Nottingham Research Data Repository |
| collection | Online Access |
| description | A system has been developed in which multi-exposure Laser Speckle Contrast Imaging (LSCI) is implemented using a high frame rate CMOS imaging sensor chip. Processing is performed using a Field Programmable Gate Array (FPGA). The system allows different exposure times to be simulated by accumulating a number of short exposures. This has the advantage that the image acquisition time is limited by the maximum exposure time and that regulation of the illuminating light level is not required. This high frame rate camera has also been deployed to implement laser Doppler blood flow processing enabling direct comparison of multi-exposure laser speckle contrast imaging and Laser Doppler Imaging (LDI) to be carried out using the same experimental data. Results from a rotating diffuser indicate that both multi-exposure LSCI and LDI provide a linear response to changes in velocity. This cannot be obtained using single-exposure LSCI unless an appropriate model is used for correcting the response. |
| first_indexed | 2025-11-14T19:59:56Z |
| format | Article |
| id | nottingham-45765 |
| institution | University of Nottingham Malaysia Campus |
| institution_category | Local University |
| last_indexed | 2025-11-14T19:59:56Z |
| publishDate | 2015 |
| publisher | Optical Society of America |
| recordtype | eprints |
| repository_type | Digital Repository |
| spelling | nottingham-457652020-05-04T17:20:28Z https://eprints.nottingham.ac.uk/45765/ Multi-exposure laser speckle contrast imaging using a high frame rate CMOS sensor with a field programmable gate array Sun, Shen Hayes-Gill, Barrie R. He, Diwei Zhu, Yiqun Morgan, Stephen P. A system has been developed in which multi-exposure Laser Speckle Contrast Imaging (LSCI) is implemented using a high frame rate CMOS imaging sensor chip. Processing is performed using a Field Programmable Gate Array (FPGA). The system allows different exposure times to be simulated by accumulating a number of short exposures. This has the advantage that the image acquisition time is limited by the maximum exposure time and that regulation of the illuminating light level is not required. This high frame rate camera has also been deployed to implement laser Doppler blood flow processing enabling direct comparison of multi-exposure laser speckle contrast imaging and Laser Doppler Imaging (LDI) to be carried out using the same experimental data. Results from a rotating diffuser indicate that both multi-exposure LSCI and LDI provide a linear response to changes in velocity. This cannot be obtained using single-exposure LSCI unless an appropriate model is used for correcting the response. Optical Society of America 2015-10-05 Article PeerReviewed Sun, Shen, Hayes-Gill, Barrie R., He, Diwei, Zhu, Yiqun and Morgan, Stephen P. (2015) Multi-exposure laser speckle contrast imaging using a high frame rate CMOS sensor with a field programmable gate array. Optics Letters, 40 (20). pp. 4587-4590. ISSN 0146-9592 https://www.osapublishing.org/ol/abstract.cfm?uri=ol-40-20-4587 doi:10.1364/OL.40.004587 doi:10.1364/OL.40.004587 |
| spellingShingle | Sun, Shen Hayes-Gill, Barrie R. He, Diwei Zhu, Yiqun Morgan, Stephen P. Multi-exposure laser speckle contrast imaging using a high frame rate CMOS sensor with a field programmable gate array |
| title | Multi-exposure laser speckle contrast imaging using a high frame rate CMOS sensor with a field programmable gate array |
| title_full | Multi-exposure laser speckle contrast imaging using a high frame rate CMOS sensor with a field programmable gate array |
| title_fullStr | Multi-exposure laser speckle contrast imaging using a high frame rate CMOS sensor with a field programmable gate array |
| title_full_unstemmed | Multi-exposure laser speckle contrast imaging using a high frame rate CMOS sensor with a field programmable gate array |
| title_short | Multi-exposure laser speckle contrast imaging using a high frame rate CMOS sensor with a field programmable gate array |
| title_sort | multi-exposure laser speckle contrast imaging using a high frame rate cmos sensor with a field programmable gate array |
| url | https://eprints.nottingham.ac.uk/45765/ https://eprints.nottingham.ac.uk/45765/ https://eprints.nottingham.ac.uk/45765/ |