Vijayakumar A, Rosen Joseph
Opt Lett. 2017 Mar 1;42(5):947-950. doi: 10.1364/OL.42.000947.
In this Letter, we present an advanced optical configuration of coded aperture correlation holography (COACH) with a diffractive objective lens. Four-dimensional imaging of objects at the three spatial dimensions and with an additional spectral dimension is demonstrated. A hologram of three-dimensional objects illuminated by different wavelengths was recorded by the interference of light diffracted from the objects with the light diffracted from the same objects, but through a random-like coded phase mask (CPM). A library of holograms denoted point spread function (PSF) holograms were prerecorded with the same CPM, and under identical conditions, using point objects along different axial locations and for the different illuminating wavelengths. The correlation of the object hologram with the PSF hologram recorded using a particular wavelength, and at a particular axial location, reconstructs only the object corresponding to the particular axial plane and to the specific wavelength. The reconstruction results are compared with regular imaging and with another well-established holographic technique called Fresnel incoherent correlation holography.
在本信函中，我们展示了一种带有衍射物镜的编码孔径相关全息术（COACH）的先进光学配置。实现了对物体在三个空间维度以及额外一个光谱维度上的四维成像。通过物体衍射光与同一物体但透过类似随机编码相位掩模（CPM）的衍射光的干涉，记录了由不同波长照明的三维物体的全息图。使用相同的CPM，在相同条件下，沿着不同轴向位置并针对不同照明波长，使用点物体预先记录了一组表示点扩散函数（PSF）全息图的全息图库。物体全息图与使用特定波长并在特定轴向位置记录的PSF全息图的相关性，仅重建对应于特定轴向平面和特定波长的物体。将重建结果与常规成像以及另一种成熟的全息技术——菲涅耳非相干相关全息术进行了比较。
