云南天文台26厘米高分辨真空太阳光球色球望远镜

26cm High-Resolution Vaccum Solar Photospheric and Chromospheric Telescope at the Yunnan Observatory

云南天文台26cm高分辨真空太阳光球色球望远镜于1986年建成安装,1989年3月通过技术鉴定正式投入观测使用。该望远镜有光球和色球两个镜筒,物镜口径均为26cm,可同时观测太阳视面上同一活动区光球和色球两层次中的细节。光球太阳象直径300mm,画幅24×36mm,视场为2′.6×3′.8,最佳分辨为0″.7。色球太阳象直径85mm,画幅16×22mm,视场为3′.6×7′.3,最佳分辨为1.″2。色球观测所用滤光器的透射带中心波长6562.8,带宽0.46和0.24互换使用,谱线可位移±1.5。 本文简述提出研制该望远镜的学术依据、研制简史,描述它的总体性能指标、光学系统以及提高分辨本领所采用的主要技术措施。文章简介该望远镜的安装调试和试观测期内发生的各种问题及其技术处理。最后提及正在进行中的望远镜性能完善和改进工作,展望在第22周太阳活动峰年期内在国内和国际联合观测研究中能发挥的作用。 选刊若干照片作为该望远镜取得的光球和色球现象的观测示例。

A 26cm high-resolution vaccum solar photospheric and chromosphoeric telescope developed by the Nanjing Astronomical Factory and the Yunnan Observatory was installed at the Yunnan Observatory in early 1986 and put into operation in March 1989. It is a spar of double tubes with an aperture of 26cm each for observing the photospheric and chromospheric fine structures of active phenomena on the SunPerformance of the 26cm solar telescopePhotospheric tube Chromospheric tubeAperture 260mm 260mmDimeter of solar image 300mm 85mmField of view 3.8'×2.6' 7.3×6.0'Frame size 36 × 24mm 22 × 16mmFilter 5500±100A 6562.8 A, 0.46 A/0.24 A, shift ± 1.5 AExposure time 1/500, 1/1000 sec. 1/20 sec.Spatial resolution 0.7 arcsec 1.2 arcsccTemporal resolution 1 sec. 5 sec.the scientific basis and brief history of the development of the telescope, its overall performance and optical system, and the main technical measures adopted for obtaining the high-resolution observations of the Sun arc described. The installation, adjustment and test observation of the telescope are also briefly described. Some work on the perfection and improvement of the performance of the telescope is being done, so that the telescope may play an active role in the research on flares during Cycle 22.