We propose a method for extending the space bandwidth (SBW) available for recording an object wave in parallel phase-shifting digital holography using a four-channel polarization-imaging camera. A linear spatial carrier of the reference wave is introduced to an optical setup of parallel four-step phase-shifting interferometry using a commercially available polarization-imaging camera that has four polarization-detection channels. Then a hologram required for parallel two-step phase shifting, which is a technique capable of recording the widest SBW in parallel phase shifting, can be obtained. The effectiveness of the proposed method was numerically and experimentally verified.
© 2013 Optical Society of America
Original Manuscript: April 29, 2013
Revised Manuscript: June 9, 2013
Manuscript Accepted: June 10, 2013
Published: July 9, 2013
Tatsuki Tahara, Yasunori Ito, Peng Xia, Yasuhiro Awatsuji, Kenzo Nishio, Shogo Ura, Toshihiro Kubota, and Osamu Matoba, "Space-bandwidth extension in parallel phase-shifting digital holography using a four-channel polarization-imaging camera," Opt. Lett. 38, 2463-2465 (2013)