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1 November 1990 Laser-speckle data collection experiments
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Active optical systems have potential for both long range discrimination and pointing and tracking missions. The narrow beamwidth and high angular resolution of optics provides advantages which can make optics the sensor of choice for these missions. The large aperture required to achieve high angular resolution presents several problems for conventional optical systems. For imaging with sub-meter resolution at a range of several thousand kilometers, apertures greater than one meter in diameter are required. Apertures of this size are difficult to steer rapidly to image many targets per second. In addition, fabrication of large primary mirrors is more difficult for large aperture sizes. Finally, the weight of large mirrors must scale approximately as D3 to maintain the mirror figure without active correction; weight equals cost for a space-based system. Active correction requires complex control systems and a beacon or other means for determining correct actuator position.
© (1990) COPYRIGHT Society of Photo-Optical Instrumentation Engineers (SPIE). Downloading of the abstract is permitted for personal use only.
Philip D. Henshaw, David E.B. Lees, and Robert F. Dillon "Laser-speckle data collection experiments", Proc. SPIE 1351, Digital Image Synthesis and Inverse Optics, (1 November 1990);

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