title: Fast and low-cost structured light pattern sequence projection.
abstract: 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.
authors: Laboratory for Machine Tools and Production Engineering (WZL), University of Technology Aachen (RWTH Aachen), Manfred-Weck Building, Steinbachstrasse 19, 52074 Aachen, Germany. patrick.wissmann@siemens.com
authors: Patrick
authors: P
authors: Wissmann
authors: Frank
authors: F
authors: Forster
authors: Robert
authors: R
authors: Schmitt
mesh_terms: D004867:Equipment Design; D019544:Equipment Failure Analysis; D021621:Imaging, Three-Dimensional / Q000295:instrumentation*; D008029:Lighting / Q000295:instrumentation*; D012031:Refractometry / Q000295:instrumentation*