Phase-shifting digital holography with a phase difference between orthogonal polarizations

Abstract

Phase-shifting digital holography with a phase difference between orthogonal polarizations is proposed. The use of orthogonal polarizations can make it possible to record two phase-shifted holograms simultaneously. By combining the holograms with the distributions of a reference wave and an object wave, the complex field of the object's wavefront can be obtained. Preliminary experimental results are shown to confirm the proposed method.

Phase-Shifting Point Diffraction Interferometer Having Two Point Light Sources of Single-Mode Optical Fibers

“…When an aspherical mirror is tested, the diagnostic wavefront gets highly distorted and the resultant PDI interferograms do not reflect the surface figure in PS analysis. Therefore, aspherical surface figure measurement by PS/PDI usually requires (1) the stitching method, which connects all valid PS/PDI data in every part of the surface (Ota et al, 2001;Chen et al, 2006), or (2) numerical restoration of the actual wavefront on the mirror surface from the highly distorted PS/PDI data (Yamaguchi et al, 2006;Iemmi et al, 2005;Nomura et al, 2006). Procedure (2) is also predictably effective for spherical mirror measurement to obtain higher-accuracy data.…”

N-Shots 2N-Phase-Steps Binary Grating Interferometry

“…al., 2006) in conjunction with crossed linear polarization filters for modulation of polarization (Nomura, et. al., 2006) and grating displacements.…”

Simultaneous Phase Shifting Shearing Interferometry for Measurement of Static and Dynamic Phase Objects

“…These systems have been employed in several fields of application, such as optical metrology [Wyant, 2004;Cheng and Wyant, 1984], holography [Yamaguchi and Zhang, 1997;Nomura, 2006], optical tomography [Meneses, 2006], ESPI [Chen, 2010], etc. In this chapter, we present theoretical analyses and experimental results obtained by implementing several shearing simultaneous phaseshifting interferometers capable of retrieving the directional derivatives in the xdirection, or adapting the systems to obtain radial derivatives [Serrano et al, 2011], allowing direct slope measurements; in each case, the optical phase data are processed by means of the capture of n-interferograms in a single shot.…”