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Optica Publishing Group
  • Chinese Optics Letters
  • Vol. 9,
  • Issue 12,
  • pp. 120002-
  • (2011)

Reflective point-dif fraction microscopic interferometer with long-term stability (Invited Paper)

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Abstract

An on-axis phase-shifting reflective point-diffraction microscopic interferometer for quantitative phase microscopy based on Michelson architecture is proposed. A cube beamsplitter splits the object wave spectrum into two copies within two arms. Reference wave is rebuilt in one arm by low-pass filtering on the object wave frequency spectrum with a pinhole-mask mirror, and interferes with the object wave from the other arm. Polarization phase-shifting is performed and phase imaging on microscale specimens is implemented. The experimental results demonstrate that the proposed scheme has the advantage of long-term stability due to its quasi common-path geometry with full use of laser energy.

© 2011 Chinese Optics Letters

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