Laser-Based Dual-Space Microscopy
| dc.contributor.committeeChair | de Peralta, Luis G. | |
| dc.contributor.committeeMember | Bernussi, Ayrton A. | |
| dc.contributor.committeeMember | Sanati, Mahdi | |
| dc.contributor.committeeMember | Ramkumar, Seshadri | |
| dc.creator | Alotaibi, Maged F. | |
| dc.date.accessioned | 2024-03-04T16:54:47Z | |
| dc.date.available | 2024-03-04T16:54:47Z | |
| dc.date.issued | 2018-05 | |
| dc.description.abstract | This dissertation numerically and experimentally implements Dual Space Microscopy (DSM)—a newly developed system for imaging objects in both the frequency and the real domain—using a laser as the illumination source. Results show that a highly coherent illumination source (like a laser) can be used to generate a high-resolution image of an object and to extend the field of view (FOV) in the object plane to a degree reversely proportional to the sizes of the diffraction orders present in the Fourier plane (FP) image. DSM and Fourier Ptychographic Microscopy (FPM), the other imaging system considered in this work, can overcome the physical limitation imposed by the microscope’s objective lens by combining synthetic aperture and phase retrieval techniques. Results also show that DSM can fully recover both the amplitude and phase information, which is inevitably lost during microscopic observation. Additionally, while DSM and FPM originally varied the angle of illumination of a single source, this dissertation numerically and experimentally implemented multiplexed illumination. The imaging system that resulted is termed “Illumination Direction Multiplexing Fourier Ptychographic Microscopy” (IDM–FPM). While IDM–FPM has been shown to reduce the acquisition time and the size of the data set required by orders of magnitude, it produces reconstructed images with high-resolutions. Finally, we investigate FPMs lateral resolution limit in imaging objects with spatial periodicities below the Rayleigh resolution limit. This work shows that FPM can indeed resolve the periodic features of photonic crystals well below the Rayleigh resolution limit. This result contradicts previous reports, which claimed that FPM cannot overcome the Rayleigh resolution limit in imaging photonic crystals. | |
| dc.format.mimetype | Application/pdf | |
| dc.identifier.uri | https://hdl.handle.net/2346/97687 | |
| dc.language.iso | en | |
| dc.rights.availability | Restricted until 03/2023. | |
| dc.subject | Microscopy | |
| dc.subject | Imaging systems | |
| dc.title | Laser-Based Dual-Space Microscopy | |
| dc.type | Dissertation | |
| thesis.degree.department | Physics and Astronomy | |
| thesis.degree.discipline | Physics | |
| thesis.degree.grantor | Texas Tech University | |
| thesis.degree.level | Doctoral | |
| thesis.degree.name | Doctor of Philosophy |