Smart photonics in imaging and sensing

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dc.contributor.advisor Riza, Nabeel en Amin, M. Junaid 2017-02-14T13:47:25Z 2017-02-14T13:47:25Z 2016 2016
dc.identifier.citation Amin, M.J. 2016. Smart photonics in imaging and sensing. PhD Thesis, University College Cork. en
dc.description.abstract In this dissertation, proposed and demonstrated are several smart imaging and sensing techniques for real-world photonic applications. First, the design of an embedded systems based laser beam imager and spectrum analyser deploying a Digital Micromirror Device is described and demonstrated. The performance of the proposed laser beam imager is experimentally compared versus a commercial industrially deployed profiler, for a custom-made donut shaped 633 nm laser beam. Experimental results indicate a 68 % detection of the central null using the proposed system, versus 24 % obtained using the commercial profiler. Next, various sensing and writing application designs is based on an Electronically Controlled Variable Focus Lens (ECVFL) which allows the highest possible transverse resolution of the laser beam sampling tip for all target distances. A novel multi-image acquisition based distance sensing technique is proposed and demonstrated which overcomes the Rayleigh criteria limited axial resolution restriction of prior-art ECVFL based sensors. An active Depth from Defocus (DFD) system is proposed next, which uses coherent conditioned illumination to provide a sharpness retaining projection pattern over multiple target planes to aid the DFD computation procedure. Furthermore, the camera of the proposed DFD system, which acquires images having varying degree of defocus, involves use of an ECVFL to form a no moving parts camera design. An eye vision testing system is also presented and demonstrated for myopic refractive error vision corrections from zero to -5 Diopters. In addition, a novel eyewear design is also proposed which uses aperture control for vision correction. Sensor applications are discussed next, including design of an agile wavelength multiplexed optical interferometry scanning sensor for extreme environment sensing applications. A barcode imaging system, based on a laser line and smart optics, is proposed which allows an extended working range of barcode detection versus conventional systems. en
dc.format.mimetype application/pdf en
dc.language.iso en en
dc.publisher University College Cork en
dc.rights © 2016, Muhammad Junaid Amin. en
dc.rights.uri en
dc.subject Optics en
dc.subject Lasers en
dc.subject Imaging en
dc.title Smart photonics in imaging and sensing en
dc.type Doctoral thesis en
dc.type.qualificationlevel Doctoral en
dc.type.qualificationname PHD (Engineering) en
dc.internal.availability Full text not available en Indefinite restriction en 9999-01-01
dc.description.version Accepted Version
dc.description.status Not peer reviewed en Electrical and Electronic Engineering en
dc.check.type No Embargo Required
dc.check.reason No embargo required en
dc.check.opt-out Yes en
dc.thesis.opt-out true
dc.check.embargoformat Not applicable en
dc.internal.conferring Spring 2017 en

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© 2016, Muhammad Junaid Amin. Except where otherwise noted, this item's license is described as © 2016, Muhammad Junaid Amin.
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