AffiliationJames C. Wyant College of Optical Sciences, University of Arizona
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CitationLuo, C., Hellman, B., Chen, G., Rodriguez, J., Perkins, C., Park, J.-H., & Takashima, Y. (2021). Single-chip DMD-based hybrid holographic beam steering for lidar. Proceedings of SPIE - The International Society for Optical Engineering, 11698.
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AbstractA 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. © 2021 SPIE.
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