Abstract
Dual-channel phase-shifting interferometry for simultaneous phase microscopy
is presented. Red and blue light beams are used for microscope illumination. A 45°
tilted beamsplitter replicates the object and reference waves in red light together
with the object wave in blue light into two parallel beams. The two resulting
quadrature phase-shifting interferograms in red light and the object waves in blue
light are generated in the two channels. The two interferograms are recorded
simultaneously by a color charge-coupled device (CCD) camera, and can be separated
via RGB components of the recorded color patterns without crosstalk. As a result,
the phase of tested specimen can be retrieved. The feasibility of the proposed
method is demonstrated by test performed on a microscopic specimen.
© 2012 Chinese Optics Letters
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