Space-bandwidth extension in parallel phase-shifting digital holography using a four-channel polarization-imaging camera.
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.
Graduate School of Science and Technology, Kyoto Institute of Technology, Kyoto, Japan.
Tatsuki
T
Tahara
Yasunori
Y
Ito
Peng
P
Xia
Yasuhiro
Y
Awatsuji
Kenzo
K
Nishio
Shogo
S
Ura
Toshihiro
T
Kubota
Osamu
O
Matoba