Tatsuki TAHARA, Yasuhiro AWATSUJI^1*, Atsushi KANEKO, Takamasa KOYAMA, Kenzo NISHIO², Shogo URA¹, Toshihiro KUBOTA³, and Osamu MATOBA⁴

Department of Electronics, Kyoto Institute of Technology, Matsugasaki, Sakyo-ku, Kyoto 606-8585, Japan
¹Division of Electronics, Kyoto Institute of Technology, Matsugasaki, Sakyo-ku, Kyoto 606-8585, Japan
²Advanced Technology Center, Kyoto Institute of Technology, Matsugasaki, Sakyo-ku, Kyoto 606-8585, Japan
³Kubota Holography Laboratory Corporation, 34-1-609 Nishihata, Ogura-cho, Uji, Kyoto 611-0042, Japan
⁴Department of Computer and Systems Engineering, Kobe University, 1-1 Rokkodai, Nada-ku, Kobe 657-8501, Japan

(Received October 27, 2009; Accepted February 13, 2010)

We propose an optical implementation of a parallel two-step phase-shifting digital holography that utilizes a polarization technique. The implementation uses a phase-shifting array device consisting of a retarder array attached to an image sensor, and does not require the optical system to image the phase-shifting array device onto the image sensor required for the previously reported optical implementation of the parallel two-step phase-shifting digital holography. Then, the proposed implementation is essentially simple to align and compose. A preliminary experiment showed that the parallel two-step phase-shifting digital holography based on the proposed implementation can remove the conjugate image clinging to the image reconstructed by Fresnel transform alone with DC term suppression. Also, when the reconstruction distance was changed, the qualities of the reconstructed images were quantitatively evaluated by using normalized root-mean-square error. It was clarified that the proposed implementation was superior to other parallel phase-shifting digital holographies and Fresnel transform alone. Thus, the validity of the proposed implementation was confirmed.

Key words: holography, digital holography, three-dimensional imaging, holographic interferometry, image reconstruction techniques, phase-shifting interferometry

^*E-mail address: awatsuji@kit.ac.jp