Analysis of the Principle and the Damaged Components of the Imported Solar K-Filter at Yunnan Observatory

Except for the 1.2Å, the main optical working band widths, 0.3Å and 0.6Å, of the imported solar K-filter at Yunnan observatory have no outgoing rays and the damage of the filter is quite serious. In this paper, the princple and the inside structure of the filter are analysed in more detail, and several possibilities of the fauly components are proposed. According to the analyses, the filter has been repaired.