Beam steering by digital micro-mirror device for multi-beam and single-chip lidar

Joshua Rodriguez, Braden Smith, Eunmo Kang, Brandon Hellman, Guanghao Chen, Adley Gin, Alonzo Espinoza, Yuzuru Takashima

Research output: Chapter in Book/Report/Conference proceedingConference contribution

1 Scopus citations

Abstract

A novel method of beam steering, utilizing a mass-produced Digital Micromirror Device (DMD), enables a reliable single chip Light Detection and Ranging (LIDAR) with a large field of view while having minimum moving components. In the single-chip LIDAR, a short-pulsed laser is fired in a synchronous manner to the micromirrors rotation during the transitional state. Since the pulse duration of the laser pulse is substantially short compared to the transitional time of the mirror rotation, virtually the mirror array is frozen in transition at several discrete points, which forms a programmable and blazed grating. The programmable blazed grating efficiently redirects the pulsed light to a single diffraction order among several while employing time of flight measurement. Previously, with a single 905nm nanosecond laser diode and Si avalanche photo diode, a measurement accuracy and rate of <1 cm and 3.34k points/sec, respectively, was demonstrated over a 1m distance range with 48° full field of view and 10 angular resolution. We have also increased the angular resolution by employing multiple laser diodes and a single DMD chip while maintaining a high measurement rate of 3.34k points/s. In addition, we present a pathway to achieve 0.65° resolution with 60° field of view and 23k points/s measurement rate.

Original languageEnglish (US)
Title of host publicationOptical Data Storage 2018
Subtitle of host publicationIndustrial Optical Devices and Systems
EditorsRyuichi Katayama, Yuzuru Takashima
PublisherSPIE
ISBN (Electronic)9781510620858
DOIs
StatePublished - Jan 1 2018
Event5th Optical Data Storage 2018: Industrial Optical Devices and Systems, ODS 2018 - San Diego, United States
Duration: Aug 19 2018 → …

Publication series

NameProceedings of SPIE - The International Society for Optical Engineering
Volume10757
ISSN (Print)0277-786X
ISSN (Electronic)1996-756X

Conference

Conference5th Optical Data Storage 2018: Industrial Optical Devices and Systems, ODS 2018
CountryUnited States
CitySan Diego
Period8/19/18 → …

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Keywords

  • DMD
  • LIDAR
  • MEMS
  • lasers
  • optics
  • photonics

ASJC Scopus subject areas

  • Electronic, Optical and Magnetic Materials
  • Condensed Matter Physics
  • Computer Science Applications
  • Applied Mathematics
  • Electrical and Electronic Engineering

Cite this

Rodriguez, J., Smith, B., Kang, E., Hellman, B., Chen, G., Gin, A., Espinoza, A., & Takashima, Y. (2018). Beam steering by digital micro-mirror device for multi-beam and single-chip lidar. In R. Katayama, & Y. Takashima (Eds.), Optical Data Storage 2018: Industrial Optical Devices and Systems [107570F] (Proceedings of SPIE - The International Society for Optical Engineering; Vol. 10757). SPIE. https://doi.org/10.1117/12.2323757