Lee Yonghee, Ito Yasunori, Tahara Tatsuki, Inoue Junichi, Xia Peng, Awatsuji Yasuhiro, Nishio Kenzo, Ura Shogo, Matoba Osamu
Opt Lett. 2014 Apr 15;39(8):2374-7. doi: 10.1364/OL.39.002374.
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.
我们提出了一种在并行相移数字全息术（PPSDH）中使用两个波长的单次相位解包裹方法。该方法能够解决PPSDH中的相位模糊问题。我们使用波长分别为473和532 nm的两台激光器对该方法进行了实验。通过铝的气相沉积制作了一个具有约1.9μm台阶的物体，该台阶比其中一台激光器半波长（266 nm）的7.1倍还大。成功演示了对该物体高度的单次测量，并验证了所提方法的有效性。
