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Fluctuation correction method and - a device with the use of a in the direction of controllable beam - / raster output scanner with polygon and a spherical optics
Fluctuation correction method and - a device with the use of a in the direction of controllable beam - / raster output scanner with polygon and a spherical optics
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机译:波动校正方法和-使用在可控光束方向上使用的装置-/具有多边形和球形光学元件的光栅输出扫描仪
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摘要
Facet-to-facet pyramidal wobble is corrected without resorting to cylindrical optics by adapting agile beam concepts to provide real-time control of the light beam position on the photoreceptor. The agile beam is provided by either or both of a variable wavelength light source (202) or a variable index of refraction prism (232). The position of the light beam is determined by either or both of a super linear position detector (224) directly detecting the position of the light beam, or a facet detector (234) and a look-up table for indirectly estimating the position of the light beam. By actively compensating for pyramidal wobble, the passive but expensive and difficult-to-position cylindrical optics can be replaced with cheap and easy-to-position spherical optics (204, 218). IMAGE
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