Enhanced multiple-plane phase retrieval using spatial light modulator as diffuser

Authors

Percival F. Almoro ⋅ PH National Institute of Physics, University of the Philippines Diliman
Mitsuo Takeda ⋅ JP Center for Optical Research and Education (CORE), Utsunomiya University
Quang Duc Pham ⋅ JP Center for Optical Research and Education (CORE), Utsunomiya University
David Ignacio Serrano-Garcia ⋅ JP Center for Optical Research and Education (CORE), Utsunomiya University
Satoshi Hasegawa ⋅ JP Center for Optical Research and Education (CORE), Utsunomiya University
Yoshio Hayasaki ⋅ JP Center for Optical Research and Education (CORE), Utsunomiya University
Toyohiko Yatagai ⋅ JP Center for Optical Research and Education (CORE), Utsunomiya University

Abstract

In the multiple-plane phase retrieval method, a diffusing element was used to enhance axial intensity variation for a non-stagnating iterative reconstruction of smooth object wavefronts. Traditional diffuser glass plates are tedious to fabricate and have fixed optical properties (i.e., are not wavelength-tunable). The aim of this work is to use a spatial light modulator (SLM) as an easily controllable diffusing element for phase retrieval. The polarization properties of the SLM enable independent access to the formation of scattered and specular beams allowing full control of their intensity ratio. A polarizer inserted between the SLM and a detector filters the polarization states and facilitates beam interference, thereby increasing speckle contrast. Using the polarization filtered setup, the contrast of the speckle patterns along the axis of beam propagation increased by 38% compared to the unfiltered case and yielded enhanced wavefront reconstructions. The technique is demonstrated using technical and biological samples and offers ease of implementation and wavelength tunability.

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Issue

2014: Proceedings of the 32nd Samahang Pisika ng Pilipinas Physics Congress

Article ID

SPP2014-3C-07

Section

Optics and Signal Processing

Published

2014-10-17

How to Cite

[1]

PF Almoro, M Takeda, QD Pham, DI Serrano-Garcia, S Hasegawa, Y Hayasaki, and T Yatagai, Enhanced multiple-plane phase retrieval using spatial light modulator as diffuser, Proceedings of the Samahang Pisika ng Pilipinas 32, SPP2014-3C-07 (2014). URL: https://proceedings.spp-online.org/article/view/1823.