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Optical Engineering

Infrared/microwave micromirror array beam combiner test and analysis
Author(s): Lijun Lv; Yi Tian; Rui Shi; Rui Xu; Liwei Jiang; Xinglong Wang; Xin Wang; Zhuo Li
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Paper Abstract

An infrared (IR, 3–5 and 8–12 μm)/microwave (MW, 2.7 GHz) micromirror array type of beam combiner was fabricated for test and analysis. A model based on transmission line theory, Snell’s law, and phase monopulse radar theory was built to analyze the boresight angle errors. Three types of boresight angle errors—inherent error, refraction-induced error and combiner inserting error—were calculated. The results indicated that combiner inserting error was the most important error. Using this theoretical model, a beam combiner was optimized, fabricated, and investigated experimentally. Measured by a phase monopulse radar, the boresight angle error introduced by the beam combiner was <0.1  deg , which coincided with the theoretical calculations. Infrared images were reflected by the beam combiner, the angular resolution of the reflected images in azimuth, and elevation directions were 40 and 80 in., respectively.

Paper Details

Date Published: 22 November 2013
PDF: 10 pages
Opt. Eng. 52(11) 114103 doi: 10.1117/1.OE.52.11.114103
Published in: Optical Engineering Volume 52, Issue 11
Show Author Affiliations
Lijun Lv, Beijing Institute of Technology (China)
Yi Tian, Beijing Institute of Technology (China)
Rui Shi, Beijing Institute of Technology (China)
Rui Xu, Beijing Institute of Technology (China)
Liwei Jiang, Beijing Institute of Technology (China)
Xinglong Wang, Beijing Institute of Technology (China)
Xin Wang, Beijing Institute of Technology (China)
Zhuo Li, Beijing Institute of Technology (China)

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