2.16米天文望远镜光学系统的调整

The alignment of optical systems for 2.16m astronomical telescope

叙述了 2 .1 6米天文望远镜卡焦及折轴光学系统的调整原理与具体步骤。调整后用恒星在卡焦光学系统焦面拍摄了刀口阴影图 ,加入熔石英像场改正镜后 [1] ,还拍摄了全视场的恒星星团照片 ,全视场底片线尺寸为 30 cm× 30 cm。结果显示 ,在全视场内从中心到边、角所有的星像都很圆 ,对其线大小测定 ,暗星直径为 0 .1 8mm～ 0 .2 0 mm。

In this paper, the principle and procedure of alignment of Cassegrain and coude optical systems for 2.16m astronomical telescope are described. With a star as the light source, a Foucault’s knife-edge graph of the optical system at the Cassegrain focus is given. After assembling the fused quartz field corrector on Cassegrain focus, a star cluster photograph with a whole field of view (30cm×30cm) is also performed. Finally, in the whole field of view from center to edge and corner, the images are round. The linear size is measured. The diameters of dim stars are 0.18mm^0.20mm.