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Applied Optics

Applied Optics

APPLICATIONS-CENTERED RESEARCH IN OPTICS

  • Editor: Joseph N. Mait
  • Vol. 53, Iss. 18 — Jun. 20, 2014
  • pp: 3875–3883

Infrared/millimeter wave mirror array beam combiner design and analysis

Yi Tian, Gang Sun, Fan Li, Hui Yan, Li Zhang, and Zhuo Li  »View Author Affiliations


Applied Optics, Vol. 53, Issue 18, pp. 3875-3883 (2014)
http://dx.doi.org/10.1364/AO.53.003875


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Abstract

The design method of an infrared/millimeter wave mirror array type of beam combiner was investigated. The beam combiner was composed of a support plate, air gap, and mirror array. It had two advantages: one was that the size of the beam combiner could be extended by splicing more mirrors; the other was that the millimeter wave passband could be tuned by adjusting the thickness of the air gap. The millimeter wave and infrared structure was designed by using transmission line theory and optimized by a simplex Nelder–Mead method. In order to analyze the influence of deformation on performance, the mechanical characteristics of the mirrors and support plate were analyzed by the finite element method. The relationship between the millimeter wave transmission characteristics and the air gap was also analyzed by transmission line theory. The scattered field caused by pillars was computed by the multilevel fast multipole method. In addition, the effect of edge diffraction on the near field uniformity was analyzed by the aperture field integration method. In order to validate the mirror array splicing principle and the infrared imaging performance, a prototype of the mirror array was fabricated and tested. Finally, the infrared images reflected by the mirror array were obtained and analyzed. The simulation and experiment results validated the feasibility of the mirror array beam combiner.

© 2014 Optical Society of America

OCIS Codes
(230.4040) Optical devices : Mirrors
(230.4170) Optical devices : Multilayers
(260.3060) Physical optics : Infrared
(350.4010) Other areas of optics : Microwaves

ToC Category:
Optical Devices

History
Original Manuscript: March 26, 2014
Revised Manuscript: May 11, 2014
Manuscript Accepted: May 11, 2014
Published: June 13, 2014

Citation
Yi Tian, Gang Sun, Fan Li, Hui Yan, Li Zhang, and Zhuo Li, "Infrared/millimeter wave mirror array beam combiner design and analysis," Appl. Opt. 53, 3875-3883 (2014)
http://www.opticsinfobase.org/ao/abstract.cfm?URI=ao-53-18-3875


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