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Two-dimensional differential interference contrast microscopy based on four-hole variation of Young's interference

Lew, Matthew and Cui, Xiquan and Heng, Xin and Yang, Changhuei (2008) Two-dimensional differential interference contrast microscopy based on four-hole variation of Young's interference. In: Imaging, Manipulation, and Analysis of Biomolecules, Cells, and Tissues VI. Proceedings of SPIE. No.6859. Society of Photo-optical Instrumentation Engineers (SPIE) , Bellingham, WA, Art. No. 685916. ISBN 9780819470348. http://resolver.caltech.edu/CaltechAUTHORS:20180711-142556625

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Abstract

We demonstrate a novel method of two-dimensional differential interference contrast (DIC) microscopy. Our method is cheaper, more compact, and more robust compared to conventional DIC microscopes; since it uses a simple variation of Young's double-slit geometry, no expensive or complex optical components are needed. In addition, our method quantitatively measures differential phase, unlike conventional DIC, which makes our device useful for optical metrology and cell biology applications. The device consists of four circular holes arranged in a "plus" pattern, milled into a metal layer 80 μm above a complimentary metal-oxide semiconductor (CMOS) image sensor. Light incident upon the four-hole aperture is transmitted through the holes and creates an interference pattern on the CMOS sensor. This pattern shifts as a function of the spatial phase gradient of the incident light. By capturing the amplitude and location of the zero-order fringe of the interference pattern, the amplitude and differential phase of the incident light can be measured simultaneously. In this article, we model the response of the device using both geometric optics and Huygens principle. We then verify these models by experimentally measuring the responsivity of our device. A short analysis on the algorithm used to calculate the fringe location follows. We then show a beam profiling application by measuring the amplitude and spatial phase gradient of a Gaussian laser beam and an optical vortex. Finally, we show a DIC microscope application; we image a phase mask of the letters "CIT".


Item Type:Book Section
Related URLs:
URLURL TypeDescription
https://doi.org/10.1117/12.760118DOIArticle
ORCID:
AuthorORCID
Yang, Changhuei0000-0001-8791-0354
Additional Information:© 2008 Society of Photo-Optical Instrumentation Engineers (SPIE). The authors acknowledge financial support from the Defense Advanced Research Projects Agency Center for Optofluidic Integration. We thank S. Han, J. Wu, and Z. Yaqoob for their technical assistance and enlightening discussions.
Funders:
Funding AgencyGrant Number
Defense Advanced Research Projects Agency (DARPA)UNSPECIFIED
Subject Keywords:differential interference contrast microscopy, interference, phase imaging
Record Number:CaltechAUTHORS:20180711-142556625
Persistent URL:http://resolver.caltech.edu/CaltechAUTHORS:20180711-142556625
Official Citation:Matthew Lew, Xiquan Cui, Xin Heng, Changhuei Yang, "Two-dimensional differential interference contrast microscopy based on four-hole variation of Young's interference", Proc. SPIE 6859, Imaging, Manipulation, and Analysis of Biomolecules, Cells, and Tissues VI, 685916 (29 February 2008); doi: 10.1117/12.760118; https://doi.org/10.1117/12.760118
Usage Policy:No commercial reproduction, distribution, display or performance rights in this work are provided.
ID Code:87767
Collection:CaltechAUTHORS
Deposited By: George Porter
Deposited On:12 Jul 2018 15:47
Last Modified:12 Jul 2018 15:47

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