极紫外望远镜是由四个单通道的望远镜捆绑在一起,以便同时对太阳的相同部分观测,由于受地面装调以及发射过程中的影响,无法保证四个通道光轴严格平行,必然带来观测位置上的误差。只要测出各通道之间的光轴夹角,便可在像面上采取适当的处理方法,以便减小这种误差,但这一夹角的测量精度必须控制在0.1″内。为达到如此高的精度,采用了太阳局部边缘探测的方法,很好地解决了这一问题。 EUV telescopes are bundled together by four single-channel telescopes to observe the same part of the sun at the same time. Due to the influence of surface adjustment and launch, there is no guarantee that the optical axes of the four channels will be strictly parallel, which inevitably leads to observation Position error. As long as the measurement of the angle between the optical axis of each channel, you can take the appropriate treatment on the image plane in order to reduce this error, but the angle measurement accuracy must be controlled within 0.1 "To achieve this High accuracy, using the sun’s local edge detection method, a good solution to this problem.