Demonstration of the CDMA-mode CAOS smart camera

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dc.contributor.authorRiza, Nabeel A.
dc.contributor.authorMazhar, Mohsin A.
dc.contributor.funderEuropean Commission
dc.contributor.funderEnterprise Ireland
dc.date.accessioned2018-02-06T13:36:27Z
dc.date.available2018-02-06T13:36:27Z
dc.date.issued2017
dc.description.abstractDemonstrated is the code division multiple access (CDMA)-mode coded access optical sensor (CAOS) smart camera suited for bright target scenarios. Deploying a silicon CMOS sensor and a silicon point detector within a digital micro-mirror device (DMD)-based spatially isolating hybrid camera design, this smart imager first engages the DMD starring mode with a controlled factor of 200 high optical attenuation of the scene irradiance to provide a classic unsaturated CMOS sensor-based image for target intelligence gathering. Next, this CMOS sensor provided image data is used to acquire a focused zone more robust un-attenuated true target image using the time-modulated CDMA-mode of the CAOS camera. Using four different bright light test target scenes, successfully demonstrated is a proof-of-concept visible band CAOS smart camera operating in the CDMA-mode using up-to 4096 bits length Walsh design CAOS pixel codes with a maximum 10 KHz code bit rate giving a 0.4096 seconds CAOS frame acquisition time. A 16-bit analog-to-digital converter (ADC) with time domain correlation digital signal processing (DSP) generates the CDMA-mode images with a 3600 CAOS pixel count and a best spatial resolution of one micro-mirror square pixel size of 13.68 μm side. The CDMA-mode of the CAOS smart camera is suited for applications where robust high dynamic range (DR) imaging is needed for un-attenuated un-spoiled bright light spectrally diverse targets.en
dc.description.sponsorshipEuropean Commission/Enterprise Ireland (ERDF 2014-2020)en
dc.description.statusPeer revieweden
dc.description.versionPublished Versionen
dc.format.mimetypeapplication/pdfen
dc.identifier.citationRiza, N. A. and Mazhar, M. A. (2017) 'Demonstration of the CDMA-mode CAOS smart camera', Optics Express, 25(25), pp. 31906-31920. doi: 10.1364/OE.25.031906en
dc.identifier.doi10.1364/OE.25.031906
dc.identifier.endpage31920
dc.identifier.issued25
dc.identifier.journaltitleOptics Expressen
dc.identifier.startpage31906
dc.identifier.urihttps://hdl.handle.net/10468/5377
dc.identifier.volume25
dc.language.isoenen
dc.publisherOptical Society of Americaen
dc.relation.urihttps://www.osapublishing.org/oe/abstract.cfm?uri=oe-25-25-31906
dc.rights© 2017, Optical Society of America. Users may use, reuse, and build upon the article, or use the article for text or data mining, so long as such uses are for non-commercial purposes and appropriate attribution is maintained. All other rights are reserved.en
dc.subjectSmart camerasen
dc.subjectImaging systemsen
dc.subjectComputational imagingen
dc.subjectOptical sensing and sensorsen
dc.titleDemonstration of the CDMA-mode CAOS smart cameraen
dc.typeArticle (peer-reviewed)en
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