Multiple beam steering using dynamic zone plates on a micromirror array
Multiple beam steering using dynamic zone plates on a micromirror array
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DOI：
10.1117/1.oe.57.7.073109
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发表时间：
2018-07-01
影响因子：
1.3
通讯作者：
Benton, David M.
中科院分区：
文献类型：
--
作者：
Benton, David M.
利用DMD微镜阵列实现了激光束的三维聚焦控制。激光束聚焦位置是使用动态可调波带片控制的。这些波带片采用椭圆菲涅耳波带片或其他变型的形式，例如二元伽柏波带片。无需一对检流计反射镜和聚焦透镜就可以实现主动光束指向和控制。通常可以看到百分之几的离轴衍射级的聚焦效率，并且相邻级之间的连续性增加了有效的视场。将多个波带片图案写入DMD使得能够独立地产生和控制多个聚焦光斑。(C)2018年，摄影光学仪器工程师协会（SPIE）
Three-dimensional (3-D) laser beam steering of focal position has been demonstrated using a single optical device-a DMD micromirror array. Laser beam focus position is controlled using dynamically adjustable zone plates. These zone plates take the form of elliptical Fresnel zone plates or other variations such as binary Gabor zone plates. Active beam pointing and control can be realized without the need for a pair of galvanometer mirrors and a focusing lens. Focusing efficiencies into an off-axis diffraction order of a few percent are typically seen and continuity between neighboring orders increases the effective field of regard. Writing multiple zone plate patterns to the DMD enables multiple focused spots to be generated and controlled independently. (C) 2018 Society of Photo-Optical Instrumentation Engineers (SPIE)