Optimized Design of CCD Temperature Control Structure of the Primary Focus Telescope

Abstract

The primary focus telescope has the advantages of a large field of view and less loss of light energy, and plays an important role in the field of time-domain survey. The 1-meter large field-of-view telescope of Nanjing University uses the primary focus optical system. The 6k × 6k CCD is located at the primary focal point in the optical path. The CCD will have a large amount of heat during the working process, which will affect the telescope's imaging quality. According to the requirements of the imaging quality of the NTU 1-meter telescope optical system, the difference between the temperature of the CCD housing and the ambient temperature needs to be controlled within 1 °C. Therefore, the paper proposes a temperature control scheme for thermal insulation materials, and optimizes the performance of the temperature control scheme. The temperature control accuracy of this solution is within 0.6 °C.