Seo Yeong-Hyeon, Kim Hyunwoo, Yang Sung-Pyo, Hwang Kyungmin, Jeong Ki-Hun
Opt Express. 2020 May 11;28(10):15173-15180. doi: 10.1364/OE.392953.
Structured illumination plays an important role in advanced photographic and microscopic imaging applications. Here we report variable structured illumination (VSI) using Lissajous scanning techniques. The variable structured illumination module comprises Lissajous scanning micromirror and fiber-based diode pumped solid state (DPSS) laser with intensity modulation, combined with a stereo camera for dynamic stereo depth map. The micromirror projects static and discrete patterns by modulating the intensity of a laser beam at the least common multiple (LCM) of two scanning frequencies. The pattern density is increased by either decreasing the greatest common divisor (GCD) of scanning frequencies or decreasing the duty rate of the laser modulation. The scanning amplitude also controls the field-of-view (FOV) for the exact illumination of a target object for dynamic stereo depth map. The variable structured illumination module provides a new route for advanced imaging applications such as high-quality depth map, super-resolution, or motion recognition.
结构化照明在先进的摄影和显微成像应用中发挥着重要作用。在此，我们报告了使用李萨如图形扫描技术的可变结构化照明（VSI）。可变结构化照明模块包括李萨如图形扫描微镜和具有强度调制功能的基于光纤的二极管泵浦固态（DPSS）激光器，并结合了用于动态立体深度图的立体相机。微镜通过在两个扫描频率的最小公倍数（LCM）处调制激光束的强度来投射静态和离散图案。通过降低扫描频率的最大公因数（GCD）或降低激光调制的占空比，可以增加图案密度。扫描幅度还控制用于动态立体深度图中目标物体精确照明的视场（FOV）。可变结构化照明模块为诸如高质量深度图、超分辨率或运动识别等先进成像应用提供了一条新途径。
