Lightweight Mirror Structures for Mechanical Beam Steering
نویسنده
چکیده
Defense applications ofspace-borne laser radar require a sensor that can point to a large number of targets in rapid succession and over a wide field of regard. By using a fullaperture, mechanically steered flat mirror, the requirements for high-acceleration beam steering can be met. Three alternative mirror structures were designed and their perfonnance was evaluated through computer simulation. The mirror structures were (1) a thin glass sandwich coupled to a deep backup structure, (2) a full-depth beryllium sandwich, and (3) a full-depth graphite/epoxy sandwich. Unlike existing large steering mirrors. these mirrors can survive angular accelerations as high as 1000 rad/s dUring steering. yet still limit residual vibration amplitudes after steering to A/20 nns at 1O.611m. All three designs can use existing fabrication technologies to meet perfonnance goals.
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