A beam-steering system consisting of three cemented achromatic doublets is presented. Intended for use in IR countermeasure applications, our system is designed to operate over the 2- to 5-μm spectrum with minimum angular dispersion. We show that dispersion can be minimized by using doublet lenses fashioned from AMTIR-1 and germanium. Our system is designed to be compact and lightweight, with no internal foci, while allowing steering to ±22.5 deg. We also maintain a minimum 2-in. clear aperture for all steering angles, and a nominal divergence of 1 mrad. Plane wave and Gaussian beam analyses of our system are presented.
Copyright © 2004, Society of Photo Optical Instrumentation Engineers
Society of Photo Optical Instrumentation Engineers
Gibson, Jennifer L.; Duncan, Bradley D.; Watson, Edward A.; and Loomis, John S., "Wide Angle Decentered Lens Beam Steering for Infrared Countermeasures Applications" (2004). Electro-Optics and Photonics Faculty Publications. 22.