Zangpo Jigme, Kawabe Tomohiro, Kobayashi Hirokazu
Opt Express. 2023 Nov 6;31(23):38388-38399. doi: 10.1364/OE.502890.
Recently, a 4f system containing a q-plate has been used to perform edge detection and enhancement of amplitude or phase objects. However, only a few studies have concentrated on edge enhancement of complex phase-amplitude objects. Here we experimentally verified the functional difference between scalar and vectorial vortex filtering with the q-plate using an onion cell as a complex object and the vectorial vortex filtering successfully enhanced the edges of phase and amplitude objects in the phase-amplitude object. One problem, however, is indistinguishability of the equally-enhanced edges of the phase and amplitude objects. To address this issue, we propose a method to isolate the edge of the phase object from the edge of the amplitude object using off-axis beam illumination. We theoretically calculated the isolation of the edge of the phase object from the amplitude object, and verified via numerical simulations.
最近，一种包含q波片的4f系统已被用于执行幅度或相位物体的边缘检测和增强。然而，只有少数研究集中在复相位-幅度物体的边缘增强上。在这里，我们使用洋葱细胞作为复杂物体，通过实验验证了使用q波片进行标量和矢量涡旋滤波之间的功能差异，并且矢量涡旋滤波成功增强了相位-幅度物体中相位和幅度物体的边缘。然而，一个问题是相位和幅度物体同等增强的边缘难以区分。为了解决这个问题，我们提出了一种使用离轴光束照明将相位物体的边缘与幅度物体的边缘隔离开来的方法。我们从理论上计算了相位物体边缘与幅度物体边缘的隔离，并通过数值模拟进行了验证。
