Methods for determining a shape of a substantially cylindrical specular reflective surface

A method for determining a shape of a substantially cylindrical specular reflective surface includes the step of obtaining calibration data and the step of obtaining target data about a target structure, where the target structure includes a spatial frequency pattern. The method further includes the step of capturing a reflected image of the target structure in the specular reflective surface and the step of obtaining reflected data from the reflected image. The method further includes the step of determining a correspondence between the target data and the reflected data and the step of using the correspondence and the calibration data to determine a shape of the specular reflective surface. 用于确定基本圆柱形镜面反射表面的形状的方法包括如下步骤：获得校准数据，以及获得关于目标结构的目标数据，其中，目标结构包括空间频率式样。该方法还包括如下步骤：俘获目标结构在镜面反射表面中的反射图像，以及从反射图像获得反射数据。该方法还包括如下步骤：确定目标数据和反射数据之间的对应性，以及使用对应性和校准数据来确定镜面反射表面的形状。