TY - GEN
T1 - Portable low-coherence interferometry for quantitatively imaging fast dynamics with extended field of view
AU - Shaked, Natan T.
AU - Girshovitz, Pinhas
AU - Frenklach, Irena
PY - 2014/1/1
Y1 - 2014/1/1
N2 - We present our recent advances in the development of compact, highly portable and inexpensive wide-field interferometric modules. By a smart design of the interferometric system, including the usage of low-coherence illumination sources and common-path off-axis geometry of the interferometers, spatial and temporal noise levels of the resulting quantitative thickness profile can be sub-nanometric, while processing the phase profile in real time. In addition, due to novel experimentally-implemented multiplexing methods, we can capture low-coherence off-axis interferograms with significantly extended field of view and in faster acquisition rates. Using these techniques, we quantitatively imaged rapid dynamics of live biological cells including sperm cells and unicellular microorganisms. Then, we demonstrated dynamic profiling during lithography processes of microscopic elements, with thicknesses that may vary from several nanometers to hundreds of microns. Finally, we present new algorithms for fast reconstruction (including digital phase unwrapping) of off-axis interferograms, which allow real-time processing in more than video rate on regular single-core computers.
AB - We present our recent advances in the development of compact, highly portable and inexpensive wide-field interferometric modules. By a smart design of the interferometric system, including the usage of low-coherence illumination sources and common-path off-axis geometry of the interferometers, spatial and temporal noise levels of the resulting quantitative thickness profile can be sub-nanometric, while processing the phase profile in real time. In addition, due to novel experimentally-implemented multiplexing methods, we can capture low-coherence off-axis interferograms with significantly extended field of view and in faster acquisition rates. Using these techniques, we quantitatively imaged rapid dynamics of live biological cells including sperm cells and unicellular microorganisms. Then, we demonstrated dynamic profiling during lithography processes of microscopic elements, with thicknesses that may vary from several nanometers to hundreds of microns. Finally, we present new algorithms for fast reconstruction (including digital phase unwrapping) of off-axis interferograms, which allow real-time processing in more than video rate on regular single-core computers.
KW - Holographic microscopy
KW - Interferometric microscopy
KW - Live-cell quantitative imaging
KW - Real-time holography
UR - http://www.scopus.com/inward/record.url?scp=84906337669&partnerID=8YFLogxK
U2 - 10.1117/12.2051285
DO - 10.1117/12.2051285
M3 - Conference contribution
AN - SCOPUS:84906337669
SN - 9781628410549
T3 - Proceedings of SPIE - The International Society for Optical Engineering
BT - Three-Dimensional Imaging, Visualization, and Display 2014
PB - SPIE
T2 - Three-Dimensional Imaging, Visualization, and Display 2014
Y2 - 5 May 2014 through 7 May 2014
ER -