Nonmechanical beam switching in the midinfrared waveband

John G. Lehman Jr.; J. Michael Finlan; Kevin M. Flood; Mary E. Gerard; David C. Driscoll

doi:10.1117/12.280361

13 August 1997 Nonmechanical beam switching in the midinfrared waveband

John G. Lehman Jr., J. Michael Finlan, Kevin M. Flood, Mary E. Gerard, David C. Driscoll

Proceedings Volume 3061, Infrared Technology and Applications XXIII; (1997) https://doi.org/10.1117/12.280361
Event: AeroSense '97, 1997, Orlando, FL, United States

Abstract

We designed an electro-optical relay system to perform nonmechanical beam switching in the mid-infrared waveband and built a proof-of-concept prototype to verify the system performance. The prototype is a scalable building block that can be used to fabricate a two-dimensional system to scan a large field of regard at high resolution, low power, and high speed. We designed, fabricated, and tested the major components and then assembled the components into the electro- optical relay system, which demonstrated 8 kHz switching between two fields of view. In order to implement the system, we fabricated mid-wave infrared polarizing beamsplitter cubes that provided excellent polarization separation over a 600 nm waveband and a range of angles of incidence. Additionally, we demonstrated 90 degree polarization rotation in the mid-wave infrared waveband using ferroelectric liquid crystals.

Citation Download Citation

John G. Lehman Jr., J. Michael Finlan, Kevin M. Flood, Mary E. Gerard, and David C. Driscoll "Nonmechanical beam switching in the midinfrared waveband", Proc. SPIE 3061, Infrared Technology and Applications XXIII, (13 August 1997); https://doi.org/10.1117/12.280361

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