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Optical Engineering

Miniaturized micro-optical scanners
Author(s): M. Edward Motamedi; Angus P. Andrews; William J. Gunning; Mohsen Khoshnevisan
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Paper Abstract

Optical beam scanners are critical components for airborne and space-based laser radar, on-machine-inspection systems, factory automation systems, and optical communication systems. We describe here a laser beam steering system based on dithering two complementary (positive and negative) microlens arrays. When the two microlens arrays are translated relative to one another in the plane parallel to their surfaces, the transmitted light beam is scanned in two directions. We have demonstrated scanning speeds up to 300 Hz with a pair of 6-mm-aperture microlens arrays designed for input from a HeNe laser. The output beam covers a discrete 16 x 16 spot scan pattern with about 3.6 mrad separation and only 400 μrad of beam divergence, in close agreement with design predictions. This demo system is relatively compact; less than 2 in. on a side. We also describe several near-term applications, some critical design trade-offs, and important fabrication and design issues.

Paper Details

Date Published: 1 November 1994
PDF: 8 pages
Opt. Eng. 33(11) doi: 10.1117/12.181574
Published in: Optical Engineering Volume 33, Issue 11
Show Author Affiliations
M. Edward Motamedi, Rockwell Science Ctr. (United States)
Angus P. Andrews, Rockwell International Corp. (United States)
William J. Gunning, Rockwell International Science Ctr. (United States)
Mohsen Khoshnevisan, Rockwell International Science Ctr. (United States)

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