A three-dimensional (3-D) optical-scanning technique is proposed based on spatial optical phase code activation on an input beam. This code-multiplexed optical scanner (C-MOS) relies on holographically stored 3-D beam-forming information. Proof-of-concept C-MOS experimental results by use of a photorefractive crystal as a holographic medium generates eight beams representing a basic 3-D voxel element generated via a binary-code matrix of the Hadamard type. The experiment demonstrates the C-MOS features of no moving parts, beam-forming flexibility, and large centimeter-size apertures. A novel application of the C-MOS as an optical security lock is highlighted.
© 2003 Optical Society of America
Original Manuscript: June 18, 2002
Revised Manuscript: October 15, 2002
Published: March 10, 2003
Nabeel A. Riza and Muzammil A. Arain, "Code-multiplexed optical scanner," Appl. Opt. 42, 1493-1502 (2003)