Experiment of an Infrared telescope with low background emission.

我们开发了一个赤道安装光学实验台，在上面可以通过引入自然物体如恒星和星云来测试各种类型的光学元件。在变星系列测光观测中，对赤道平台的指向和跟踪性能进行了详细的研究。确定了在望远镜控制程序中输入的指向修正参数(IH、ID、NP、ME、MA)。通过改正，指向误差应该会有很大的改善。该计划的另一个目标是在地面设施上建造一个低温望远镜。我们面临着几个需要通过小实验来解决的问题：1)CaF_2窗口机械结构的公差；2)电机在液氮温度下的长期耐久性；3)由于阪神地震对工厂的破坏，低温反射镜的材料不可用。我们将尝试通过引入新预算的阵列传感器来实现这一目标。

We developed an equatorial mount optical bench, on which various types of optics can be tested by introducing natural objects i.e.stars and nebulae. Pointing and tracking performances of the equatorial mounting are scrutinised in the series of photometric pbservations of variable stars. We determined the correction parameters of pointing (IH,ID,NP,ME,MA)to be input in the contol program of the telescope. The errors for pointing should be much improved by the correction. The other target of the program is to build a cryogenical telescope at the ground-level facility. We face several problems to be solved by small experiments.1) Tolerance of mechanical structures for CaF2 window.2) Long-term durance of motors under liquid nitrogen temperature.3) inavalability of materials for cryogenical mirrors due to damage of the campany by the Hanshin earth-quake. We will try to realize it by introducing array sensor with a new budget soon.