Indebetouw G, Klysubun P
Department of Physics, Virginia Tech, Blacksburg 24061-0435, USA.
J Opt Soc Am A Opt Image Sci Vis. 2001 Feb;18(2):319-25. doi: 10.1364/josaa.18.000319.
We develop the theoretical background of a holographic method in which the hologram is sampled simultaneously in space and in time by a charge-coupled device (CCD) sensor. With the use of temporal heterodyning (rather than spatial heterodyning, which is employed in conventional holography), in-line, single-sideband holograms of fields having an arbitrary degree of spatial coherence are recorded in an exposure time that can theoretically be as short as four frames of the CCD. The method is applied to microholography and is shown to avoid the main drawbacks of conventional holographic microscopy, namely, the need for high-spatial-bandwidth detectors and for a high degree of spatial coherence, which unavoidably leads to speckle noise. The possibility of a posteriori aberration compensation is demonstrated, and experimental results are presented.
我们开发了一种全息方法的理论背景，其中全息图由电荷耦合器件（CCD）传感器在空间和时间上同时进行采样。通过使用时间外差技术（而非传统全息术中采用的空间外差技术），在理论上可短至CCD四帧的曝光时间内，记录具有任意空间相干度的场的同轴、单边带全息图。该方法应用于微全息术，结果表明它避免了传统全息显微镜的主要缺点，即需要高空间带宽探测器以及高度的空间相干性，而这不可避免地会导致散斑噪声。证明了后验像差补偿的可能性，并给出了实验结果。
