Gass J, Dakoff A, Kim M K
Department of Physics, University of South Florida, Tampa, Florida 33620, USA.
Opt Lett. 2003 Jul 1;28(13):1141-3. doi: 10.1364/ol.28.001141.
We present a phase-imaging method with an axial range that can in principle be arbitrarily large compared to the wavelength and does not involve the usual phase unwrapping by detection of phase discontinuity. The method consists of the generation and combination of two phase maps in a digital holography system by use of two separate wavelengths. For example, we reconstructed the surface of a spherical mirror with approximately 10-nm axial resolution and an axial range of approximately 3 microm.
我们提出了一种相位成像方法，其轴向范围原则上与波长相比可以任意大，并且不涉及通过检测相位不连续性进行的常规相位展开。该方法通过使用两个不同的波长在数字全息系统中生成并组合两个相位图。例如，我们以约10纳米的轴向分辨率和约3微米的轴向范围重建了球面镜的表面。
