Single-chip holographic beam steering for lidar by a digital micromirror device with angular and spatial hybrid multiplexing
Abstract
A digital micromirror device (DMD) based holographic beam steering technique is reported that multiplexes fine-steering binary amplitude gratings with a coarse-steering programmable blazed grating. The angular spatial light modulation (ASLM) technique encodes the spatial pattern of the binary amplitude grating at the same plane as the angular modulation set by a phase map of the DMD-based beam steering technique. The beam steering technique is demonstrated at 532 nm and implemented into a 905 nm lidar system. The results of the lidar system tests are presented, achieving a 44° field-of-view, 0.9°×0.4° (H×V) angular resolution, 1 m max distance, 1.5 kHz sampling, and 7.8 FPS video. Scalability techniques are proposed, including max distance increases to over 100 m.
Document Details
- Document Type
- Pub Defense Publication
- Publication Date
- Jul 10, 2020
- Source ID
- 10.1364/oe.394114
Entities
People
- Brandon Hellman
- Charles Perkins
- Chuan Luo
- Guanghao Chen
- Jae-Hyeung Park
- Joshua Rodriguez
- Yuzuru Takashima
Organizations
- Achievement Rewards for College Scientists Foundation
- Air Force Research Laboratory