We present a technique of visible spectrum quantitative phase imaging with ten millimeter range without phase ambiguity while achieving better than ten micrometer precision. A suitable synthetic wavelength for absolute phase measurement, without unwrapping, is implemented by two-wavelength digital holography. This results in amplified phase noise which is then reduced by an iterative optical and algorithm based process involving one or two additional source wavelengths. We demonstrate that these source wavelengths can be acquired from a single laser diode source by realizing the wavelength output response to fine temperature control.
David C. Clark and Myung K. Kim, "Extended synthetic wavelength phase imaging by multiwavelength digital holography," Proc. SPIE 9718, Quantitative Phase Imaging II, 97182Q (Presented at SPIE BiOS: February 17, 2016; Published: 9 March 2016); https://doi.org/10.1117/12.2216880.
Conference Presentations are recordings of oral presentations given at SPIE conferences and published as part of the conference proceedings. They include the speaker's narration along with a video recording of the presentation slides and animations. Many conference presentations also include full-text papers. Search and browse our growing collection of more than 12,000 conference presentations, including many plenary and keynote presentations.
Monte Carlo based light propagation models to improve efficacy of biophotonics based therapeutics of hollow organs and solid tumours including photodynamic therapy and photobiomodulation (Conference Presentation)