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Optics Express

Optics Express

  • Editor: C. Martijn de Sterke
  • Vol. 19, Iss. 24 — Nov. 21, 2011
  • pp: 24657–24671

Fast and low-cost structured light pattern sequence projection

Patrick Wissmann, Frank Forster, and Robert Schmitt  »View Author Affiliations

Optics Express, Vol. 19, Issue 24, pp. 24657-24671 (2011)

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We present a high-speed and low-cost approach for structured light pattern sequence projection. Using a fast rotating binary spatial light modulator, our method is potentially capable of projection frequencies in the kHz domain, while enabling pattern rasterization as low as 2 μm pixel size and inherently linear grayscale reproduction quantized at 12 bits/pixel or better. Due to the circular arrangement of the projected fringe patterns, we extend the widely used ray-plane triangulation method to ray-cone triangulation and provide a detailed description of the optical calibration procedure. Using the proposed projection concept in conjunction with the recently published coded phase shift (CPS) pattern sequence, we demonstrate high accuracy 3-D measurement at 200 Hz projection frequency and 20 Hz 3-D reconstruction rate.

© 2011 OSA

OCIS Codes
(120.0120) Instrumentation, measurement, and metrology : Instrumentation, measurement, and metrology
(150.0150) Machine vision : Machine vision
(230.0230) Optical devices : Optical devices
(230.0250) Optical devices : Optoelectronics
(230.6120) Optical devices : Spatial light modulators
(280.4788) Remote sensing and sensors : Optical sensing and sensors

ToC Category:
Instrumentation, Measurement, and Metrology

Original Manuscript: June 8, 2011
Revised Manuscript: July 18, 2011
Manuscript Accepted: July 21, 2011
Published: November 17, 2011

Patrick Wissmann, Frank Forster, and Robert Schmitt, "Fast and low-cost structured light pattern sequence projection," Opt. Express 19, 24657-24671 (2011)

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