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10 August 1993 Scan lens design for Direct Write Scene Generation
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Various means of scene generation are used to test infrared focal plane sensors. At Arnold Engineering Development Center a Direct Write Scene Generator is being developed. A scene is projected onto the focal plane array by scanning a rake of beams across the surface of the sensor. The rake consists of 128 synchronous beams generated by passing a single laser beam through an acousto-optic cell with a complex radio frequency signal input. Each pixel of the focal plane is illuminated by one of the beams in the rake. The beam is blanked as the rake scans from one row of pixels to the next on the focal plane array. The Direct Write Scene Generator is being designed to test focal planes as large as a 512 X 512 pixel array. Scan optics were designed to focus an expanded laser beam to a spot smaller than the focal plane pixel pitch over the entire test area. Several optical configurations are needed to achieve the requirements at various wavelengths.
© (1993) COPYRIGHT Society of Photo-Optical Instrumentation Engineers (SPIE). Downloading of the abstract is permitted for personal use only.
Celia A. Doub "Scan lens design for Direct Write Scene Generation", Proc. SPIE 1970, Systems-Oriented Optical Design, (10 August 1993);

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