Single chip lidar with discrete beam steering by digital micromirror device

Braden Smith, Brandon Hellman, Adley Gin, Alonzo Espinoza, Yuzuru Takashima

Research output: Contribution to journalArticlepeer-review

40 Scopus citations

Abstract

A novel method of beam steering enables a large field of view and reliable single chip light detection and ranging (lidar) by utilizing a mass-produced digital micromirror device (DMD). Using a short pulsed laser, the micromirrors’ rotation is frozen in mid-transition, which forms a programmable blazed grating. The blazed grating efficiently redistributes the light to a single diffraction order, among several. We demonstrated time of flight measurements for five discrete angles using this beam steering method with a nano second 905nm laser and Si avalanche diode. A distance accuracy of < 1 cm over a 1 m distance range, a 48° full field of view, and a measurement rate of 3.34k points/s is demonstrated.

Original languageEnglish (US)
Pages (from-to)14732-14745
Number of pages14
JournalOptics Express
Volume25
Issue number13
DOIs
StatePublished - Jun 26 2017

ASJC Scopus subject areas

  • Atomic and Molecular Physics, and Optics

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