锯齿波
光学
光束转向
全息术
数字微镜装置
激光雷达
激光器
空间光调制器
材料科学
梁(结构)
物理
计算机科学
电信
作者
Chuan Luo,Brandon Hellman,Guanghao Chen,J.J. Rodriguez,Charles Perkins,Jae‐Hyeung Park,Yuzuru Takashima
摘要
A holographic lidar concept established on the Digital Micromirror Mirror (DMD)-based hybrid light modulation is reported, which multiplexes coarse-steering by sawtooth phase modulation and fine-steering by binary amplitude modulation. The hybrid steering is achieved by overlaying displayed Computer-Generated Holograms (CGHs) with a sawtooth blazed grating phase mask, which the blaze angle programmed by synchronized short-pulse illumination of transitioning micromirrors creating the CGHs. The steering principle is demonstrated as a 2D beam steering scheme with a 532 nm visible pulse laser, and implemented into a 905 nm lidar system with a 44° field-of-view, 0.9°×0.4° angular resolution, 7.8 FPS video frame rate, and 1 m detection distance.
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