title: Single-shot dual-wavelength phase unwrapping in parallel phase-shifting digital holography.
abstract: We propose a single-shot phase-unwrapping method using two wavelengths in parallel phase-shifting digital holography (PPSDH). The proposed method enables one to solve the phase ambiguity problem in PPSDH. We conducted an experiment of the proposed method using two lasers whose wavelengths are 473 and 532 nm. An object having about 1.9 μm step, which is 7.1 times larger than the half wavelength of one of the lasers (266 nm), was fabricated by using vapor deposition of aluminum. Single-shot measurement of the height of the object was successfully demonstrated, and the validity of the proposed method was verified.
authors: Yonghee
authors: Y
authors: Lee
authors: Yasunori
authors: Y
authors: Ito
authors: Tatsuki
authors: T
authors: Tahara
authors: Junichi
authors: J
authors: Inoue
authors: Peng
authors: P
authors: Xia
authors: Yasuhiro
authors: Y
authors: Awatsuji
authors: Kenzo
authors: K
authors: Nishio
authors: Shogo
authors: S
authors: Ura
authors: Osamu
authors: O
authors: Matoba