星载CCD相机真空热试验方法讨论

我国相关标准对于具有主动热控的星载CCD相机单机热真空试验方法一直没有明确定义,相机在试验中的温度设置值如何确定是其关键问题。文章认为此值应与相机的热设计温度范围相同;如果不以温度作为验证热设计的唯一条件,那么相机的热设计也可以同相机结构、光学设计一起,在真空热环境条件下,对相机进行光学性能检测验证。可以通过相机的热真空试验,一方面验证相机的温度适应性;另一方面,设置相应的真空热试验工况,通过光学性能检测来验证热设计。从而减少相机的热平衡试验项目,简化了研制流程。在实施过程中,为了解决相机的光学窗口热流模拟的困难,可在相机光学窗口正对、具有一定距离的位置设置反射镜,并在其背部和周边设置加热回路。文章最后结合某CCD相机的应用实例对相机的真空热试验方法进行了讨论。

Discussion on Vacuum Thermal Test Method for CCD Camera on Satellite

For a CCD camera with active thermal control, the single camera thermal vacuum test is not defined clearly in China. The most difficult point is to define the temperature variation range in the test. In this paper, this range is defined as the same as the thermal design temperature range. On the other hand, if the temperature requirement is not taken as the unique index to verify the thermal design of CCD camera, its thermal design can also be verified by the optical measurement in the test with vacuum and thermal environment conditions. In fact, this test method is commonly used to verify structure and optical design. Thermal vacuum test is the absolutely necessary test program in the CCD camera design flowchart, in which the above two points can be verified. In the end, an example is given for the method in this paper.