Waheb Bishara

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We demonstrate lensfree holographic microscopy on a chip to achieve approximately 0.6 microm spatial resolution corresponding to a numerical aperture of approximately 0.5 over a large field-of-view of approximately 24 mm2. By using partially coherent illumination from a large aperture (approximately 50 microm), we acquire lower resolution lensfree in-line(More)
  • Hassan Parsa, Bonderson, Waheb Bishara, Dave Deconde, Mike Freedman, Tobe Hagge +5 others
  • 2007
All Rights Reserved iii To all my teachers, especially the three who have been with me from the very beginning: my parents, Mahrokh and Loren, and my sister, Roxana. iv Acknowledgments First and foremost, I would like to thank the members of my thesis defense committee: my advisor John Preskill for his guidance and support, and for giving me a chance and(More)
Microfluidic devices aim at miniaturizing, automating, and lowering the cost of chemical and biological sample manipulation and detection, hence creating new opportunities for lab-on-a-chip platforms. Recently, optofluidic devices have also emerged where optics is used to enhance the functionality and the performance of microfluidic components in general.(More)
We investigate the use of wetting films to significantly improve the imaging performance of lensfree pixel super-resolution on-chip microscopy, achieving < 1 µm spatial resolution over a large imaging area of ~24 mm(2). Formation of an ultra-thin wetting film over the specimen effectively creates a micro-lens effect over each object, which significantly(More)
The recent revolution in digital technologies and information processing methods present important opportunities to transform the way optical imaging is performed, particularly toward improving the throughput of microscopes while at the same time reducing their relative cost and complexity. Lensfree computational microscopy is rapidly emerging toward this(More)
All Rights Reserved iii To my mother and my late father iv Acknowledgements It is hard to compress six years of a journey into a couple of pages, but let me give it a shot anyway. I should begin by thanking the person who influenced this thesis the most, my advisor Prof. Marc Bockrath—for taking me on as a curious-but-mostly-clueless engineer, showing faith(More)
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