Coded access optical sensor (CAOS) imager

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dc.contributor.authorRiza, Nabeel A.
dc.contributor.authorAmin, M. Junaid
dc.contributor.authorLa Torre, Juan Pablo
dc.date.accessioned2020-07-14T12:56:07Z
dc.date.available2020-07-14T12:56:07Z
dc.date.issued2015-01
dc.date.updated2020-07-14T12:50:31Z
dc.description.abstractHigh spatial resolution, low inter-pixel crosstalk, high signal-to-noise ratio (SNR), adequate application dependent speed, economical and energy efficient design are common goals sought after for optical image sensors. In optical microscopy, overcoming the diffraction limit in spatial resolution has been achieved using materials chemistry, optimal wavelengths, precision optics and nanomotion-mechanics for pixel-by-pixel scanning. Imagers based on pixelated imaging devices such as CCD/CMOS sensors avoid pixel-by-pixel scanning as all sensor pixels operate in parallel, but these imagers are fundamentally limited by inter-pixel crosstalk, in particular with interspersed bright and dim light zones. In this paper, we propose an agile pixel imager sensor design platform called Coded Access Optical Sensor (CAOS) that can greatly alleviate the mentioned fundamental limitations, empowering smart optical imaging for particular environments. Specifically, this novel CAOS imager engages an application dependent electronically programmable agile pixel platform using hybrid space-time-frequency coded multiple-access of the sampled optical irradiance map. We demonstrate the foundational working principles of the first experimental electronically programmable CAOS imager using hybrid time-frequency multiple access sampling of a known high contrast laser beam irradiance test map, with the CAOS instrument based on a Texas Instruments (TI) Digital Micromirror Device (DMD). This CAOS instrument provides imaging data that exhibits 77 dB electrical SNR and the measured laser beam image irradiance specifications closely match (i.e., within 0.75% error) the laser manufacturer provided beam image irradiance radius numbers. The proposed CAOS imager can be deployed in many scientific and non-scientific applications where pixel agility via electronic programmability can pull out desired features in an irradiance map subject to the CAOS imaging operation.en
dc.description.statusPeer revieweden
dc.description.versionPublished Versionen
dc.format.mimetypeapplication/pdfen
dc.identifier.articleid15021en
dc.identifier.citationRiza, N. A., Amin, M. J., La Torre, J. P. (2015) 'Coded access optical sensor (CAOS) imager', Journal of The European Optical Society-Rapid Publications, 10, 15021 (8 pp). doi: 10.2971/jeos.2015.15021en
dc.identifier.doi10.2971/jeos.2015.15021en
dc.identifier.endpage8en
dc.identifier.issn1990-2573
dc.identifier.journaltitleJournal of The European Optical Society-Rapid Publicationsen
dc.identifier.startpage1en
dc.identifier.urihttps://hdl.handle.net/10468/10256
dc.identifier.volume10en
dc.language.isoenen
dc.publisherEuropean Optical Societyen
dc.relation.urihttps://www.jeos.org/index.php/jeos_rp/article/view/15021
dc.rights© The Authors. All rights reserved.en
dc.subjectOptical imageren
dc.subjectCameraen
dc.subjectImagingen
dc.subjectInstrumentationen
dc.titleCoded access optical sensor (CAOS) imageren
dc.typeArticle (peer-reviewed)en
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