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Tips and tricks for aligning an image derotator

机译：对准图像旋转器的提示和技巧

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One possible key reference element in optical alignment is represented by the rotational stage, a mechanical bearing, orany similar suitable device having enough accuracy and precision so that optical tolerances are reasonably relaxed wrtimperfections in the rotational movement. This allows a safe, reliable, easy to reproduce, determination of both raysparallel to the axis or to their centering within almost any plane. An image derotator, that in its simplest form is made upby three flat mirrors arranged in a so called K-mirror layout, moving together on a precision rotating stage, seems to bethe most safe, strong, and self built-in alignment tool. Moreover you can use the mechanical part as well as the opticalone. Care has to be given when internally and externally aligning has to be accomplished within a certain degree ofprecision. To further make the situation more complex, the technical overall requirements can be tight enough that thedistribution of the error budget among the various components (imperfect mechanical rotation, imperfect internalalignment, flexures during rotations) is not due to a single item. In this case, in fact, a number of tips and tricks can beuseful to find out which is the best approach to follow. The specific case of the two K-mirrors on board LINCNIRVANAis here illustrated in a few lessons.© (2012) COPYRIGHT Society of Photo-Optical Instrumentation Engineers (SPIE). Downloading of the abstract is permitted for personal use only.
机译：光学对准中的一种可能的关键参考元件由旋转台，机械轴承或具有足够的精度和精确度的任何类似的合适的装置表示，使得光学公差在旋转运动中是合理松弛的。这允许安全，可靠，易于再现，确定平行于轴或平行于几乎在任何平面内的中心的两条光线。最简单的图像旋转器是由三个平面镜组成的，这些平面镜以所谓的K镜布局排列，并在精确的旋转台上一起移动，这似乎是最安全，最坚固，最内置的对准工具。此外，您可以使用机械零件以及光学元件。当必须在一定程度的精度内完成内部和外部对齐时，必须小心。为了进一步使情况变得更加复杂，技术总体要求可能会非常严格，以至于误差预算在各个组件之间的分布（不完美的机械旋转，不完美的内部对准，旋转过程中的挠曲）不会归因于单个项目。实际上，在这种情况下，可以使用许多提示和技巧来找出哪种是最佳的遵循方法。几节课中说明了LINCNIRVANA板上两个K镜的具体情况。©（2012）COPYRIGHT光电仪器工程师协会（SPIE）。摘要的下载仅允许个人使用。

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