Katz Barak, Rosen Joseph, Kelner Roy, Brooker Gary
Department of Electrical and Computer Engineering, Ben-Gurion University of the Negev, P.O. Box 653, Beer-Sheva 84105, Israel.
Opt Express. 2012 Apr 9;20(8):9109-21. doi: 10.1364/OE.20.009109.
Fresnel incoherent correlation holography (FINCH) records holograms under incoherent illumination. FINCH was implemented with two focal length diffractive lenses on a spatial light modulator (SLM). Improved image resolution over previous single lens systems and at wider bandwidths was observed. For a given image magnification and light source bandwidth, FINCH with two lenses of close focal lengths yields a better hologram in comparison to a single diffractive lens FINCH. Three techniques of lens multiplexing on the SLM were tested and the best method was randomly and uniformly distributing the two lenses. The improved quality of the hologram results from a reduced optical path difference of the interfering beams and increased efficiency.
菲涅耳非相干相关全息术（FINCH）在非相干照明下记录全息图。FINCH是通过在空间光调制器（SLM）上使用两个焦距衍射透镜实现的。与之前的单透镜系统相比，在更宽的带宽下观察到了更高的图像分辨率。对于给定的图像放大倍数和光源带宽，与单衍射透镜FINCH相比，使用两个焦距相近的透镜的FINCH能产生更好的全息图。测试了在SLM上进行透镜复用的三种技术，最佳方法是随机且均匀地分布这两个透镜。全息图质量的提高源于干涉光束光程差的减小和效率的提高。
