ELEE Research Component of PhD Qualifier Exam by Sofia Obando-Vasquez - ECE
Topic: Super-resolution phase imaging in Digital Holographic Microscopy via Oblique Illumination with aperture masks
Abstract: Conventional digital holographic microscopy (DHM) does not meet the current demand for non-invasive, high-resolution inspection in biomedicine, micro-manufacturing, and materials science. This research proposes a super-resolution DHM platform that exploits controlled oblique illumination created by amplitude masks to shift high-spatial-frequency information into the passband of standard low-NA objectives. The fully reconfigurable system integrates a Fourier-optics simulator, telecentric optical relays, and a frequency-stitching reconstruction pipeline to ensure faithful recovery of both amplitude and quantitative phase. The technique was validated using simulated data to assess resolution enhancement and preservation of quantitative phase imaging (QPI). A processing protocol was developed to properly weight spatial frequencies and maintain QPI capabilities. Experimental advances were made for multiple objective lenses, ensuring super-resolution across setups. This work aims to provide a low-cost DHM framework for use in industrial and biomedical settings.
Zoom Link:
Meeting ID: 935 4584 0576
Passcode: 745470
Advisor: Dr. Ana Doblas, Assistant Professor, Department of Electrical & Computer Engineering, ½ûÂþÌìÌÃ
Committee Members: Dr. John R. Buck, Chancellor Professor, Dept. of Electrical & Computer Engineering, ½ûÂþÌìÌÃ; Dr. David A. Brown, Professor, Dept. of Electrical & Computer Engineering, ½ûÂþÌìÌÃ
NOTE: All ECE graduate students are encouraged to attend. All interested parties are invited. Open to the public.
*For further information, please contact Dr. Ana Doblas via email at adoblas@umassd.edu
Lester W. Cory Conference Room, Science & Engineering Building (SENG), Room 213A
:
Ana Doblas
508.999.8471
adoblas@umassd.edu