构建透镜节点可以用来构造一个透镜模型从多个图像的校准网格，如棋盘式格局，取不同的相机焦距。

The Build lens node can be used to construct a lens model from multiple images of a calibration grid, such as a checker-board pattern, taken at different camera focal lengths.

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提出了一种航天器间相对状态光学测量系统焦距的动态校准方法。

This paper puts forward a dynamic calibration method for the focal length of the spacecraft's relative state measure system.

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科学家和工程师在接下来的几周内将校准开普勒的科学仪器——光度计，并调节望远镜基线以获得最佳焦距。

Scientists and engineers will spend the next few weeks calibrating Kepler's science instrument, the photometer, and adjusting the telescope's alignment to achieve the best focus.

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