Phase Shifting Interferometry

Super-resolution Holographic Imaging Techniques Using a Synthetic Aperture

“…수식 ( 계(phase shifting interferometry), [12,13] (2) 기준 파면이 산 란 광학장의 광학축에 대해 각도 차이를 가지고 간섭이 되게 하는 공간 변조(spatial modulation, 그림 1a-b), [14][15][16][17] (3) 빛 의 편광을 이용하는 편광 변조(polarization modulation) [18] 등의 …”

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

“…, has been demonstrated to be very useful (Schreiber & Bruning, 2007;), especially for well contrasted interferograms (Schwider, 1990). To obtain phase-shifted interferograms, a number of procedures have been demonstrated but many of them needs of N shots to capture all of those interferograms.…”

Single-Shot Phase-Shifting Digital Holography Based on the Spatial Carrier Interferometry and Its Tolerance Analysis

“…1 (b). Therefore, after interpolating the missing data point in each sub-hologram, complex amplitude of the object wave at the image sensor can be reconstructed by using three-step algorithm of phase-shifting interferometry (Schreiber et al, 2007). …”

“…However, this technology suffers from lower resolution of image sensors than photographic materials, and therefore, object size to be recorded is restricted to be large and far from the image sensor in off-axis recording geometry. These limitations can be moderated by introducing the phase-shifting method (Schreiber et al, 2007) that enables us to derive complex amplitude of the object wave on the image sensor directly from three or more phase-shifted holograms recorded in the in-line geometry (Yamaguchi & Zhang, 1997). However, since this method requires to record at least three or four phase-shifted hologram, it is useless for instantaneous measurement of the dynamic object.…”