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Optics Letters

Optics Letters


  • Editor: Xi-Cheng Zhang
  • Vol. 39, Iss. 15 — Aug. 1, 2014
  • pp: 4549–4552

Simple, portable, and low-cost microscope based on off-axis digital holography using two spherical waves

Yujie Lu, Yunhui Liu, and Tak Kit Lau  »View Author Affiliations

Optics Letters, Vol. 39, Issue 15, pp. 4549-4552 (2014)

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In this Letter, we present a highly compact and low-cost holographic microscope which is especially suitable for observing transparent samples with certain specific supports such as microchannels. This microscope employs only an inexpensive laser diode, a dual precision round aperture, and a digital light sensor. The total cost of the system except for the digital sensor is less than 400 US dollars, and a hand-held system can be made based on our setup. Besides the simple, cheap, and compact setup, this system can capture the off-axis interference pattern of two spherical waves and reconstruct the quantitative phase profile along with the amplitude image of the observed sample with the twin image eliminated in real time. Experimental results show that the resolution of our system is better than 2 μm, and the 3D structure of blood cells can be retrieved.

© 2014 Optical Society of America

OCIS Codes
(090.2880) Holography : Holographic interferometry
(120.5050) Instrumentation, measurement, and metrology : Phase measurement
(090.1995) Holography : Digital holography

ToC Category:
Instrumentation, Measurement, and Metrology

Original Manuscript: June 13, 2014
Manuscript Accepted: June 26, 2014
Published: July 29, 2014

Yujie Lu, Yunhui Liu, and Tak Kit Lau, "Simple, portable, and low-cost microscope based on off-axis digital holography using two spherical waves," Opt. Lett. 39, 4549-4552 (2014)

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