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Optical Engineering

Visible/long-wave infrared dichroic beamsplitter
Author(s): Ronald A. Ferrante; Timothy W. Rand; Robert A. Cabrera; Mark A. Paloian
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Paper Abstract

Visible/long-wave infrared (LWIR) beamsplitter optical elements are designed, fabricated, and tested to enable implementation of a single common-aperture dual-spectral-mode imaging sensor system. The coating design is compatible with both germanium and low-cost electronic-grade silicon wafer substrates. Multispectral transmission and reflection efficiencies averaging over 90% are measured over both the visible to near IR (NIR) and the LWIR spectral regions, in agreement with theoretical models. The coating design uses commercial-off-the-shelf (COTS) coating materials known to exhibit excellent mechanical and environmental stability for performance reliability and extended operational lifetime.

Paper Details

Date Published: 1 June 2005
PDF: 4 pages
Opt. Eng. 44(6) 063801 doi: 10.1117/1.1927107
Published in: Optical Engineering Volume 44, Issue 6
Show Author Affiliations
Ronald A. Ferrante, Rockwell Collins, Inc. (United States)
Timothy W. Rand, Rockwell Collins, Inc. (United States)
Robert A. Cabrera, ZC&R Coatings for Optics, Inc. (United States)
Mark A. Paloian, Pacific Optical (United States)

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