Departamento de Óptica, Universitat de Valencia, Doctor Moliner, 50, 46100 Burjassot, Spain.
Opt Lett. 2010 Dec 1;35(23):3919-21. doi: 10.1364/OL.35.003919.
We present an approach capable of high-NA imaging in a lensless digital in-line holographic microscopy layout even outside the Gabor's regime. The method is based on spatial multiplexing at the sample plane, allowing a common-path interferometric architecture, where two interferometric beams are generated by a spatial light modulator (SLM) prior to illuminating the sample. The SLM allows phase-shifting interferometry by phase modulation of the SLM diffracted beam. After proper digital processing, the complex amplitude distribution of the diffracted object wavefront is recovered and numerically propagated to image the sample. Experimental results are reported that validate the proposed method.
我们提出了一种即使在伽柏（Gabor）区域之外也能在无透镜数字共线全息显微镜布局中实现高数值孔径成像的方法。该方法基于样品平面上的空间复用，允许采用共光路干涉结构，其中两个干涉光束由空间光调制器（SLM）产生，然后再照射样品。SLM 通过对 SLM 衍射光束进行相位调制来实现相移干涉测量。经过适当的数字处理，可以恢复衍射物光场的复振幅分布，并对其进行数值传播以对样品成像。实验结果验证了所提出的方法。
