Dual-wavelength diffraction phase microscopy for real-time dispersion measurement

Mohammad Reza Jafarfard; Behnam Tayebi; Dug Young Kim

doi:10.1117/12.2061225

18 August 2014 Dual-wavelength diffraction phase microscopy for real-time dispersion measurement

Mohammad Reza Jafarfard, Behnam Tayebi, Dug Young Kim

Proceedings Volume 9203, Interferometry XVII: Techniques and Analysis; 92030T (2014) https://doi.org/10.1117/12.2061225
Event: SPIE Optical Engineering + Applications, 2014, San Diego, California, United States

Abstract

We present a dual-wavelength diffraction phase microscopy (DW-DPM) that obtains the wavelength-differentiated dual phase images in a single shot of interference fringe acquisition. For this, the diffraction phase microscopy (DPM) system was constructed with a transmission grating and a spatial filter that form a common-path interferometer. With a light source of two spectral components, a different diffraction order of the grating was utilized for each. This resulted in a combined but distinguishable interference pattern to be acquired by a single image sensor. In this research, our dualwavelength phase imaging scheme was applied to simultaneously measure dispersion of a sample. Stable and reliable measurements could be performed in a single shot due to the robust structure of our DW-DPM system.

Citation Download Citation

Mohammad Reza Jafarfard, Behnam Tayebi, and Dug Young Kim "Dual-wavelength diffraction phase microscopy for real-time dispersion measurement", Proc. SPIE 9203, Interferometry XVII: Techniques and Analysis, 92030T (18 August 2014); https://doi.org/10.1117/12.2061225

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