Thermal characters matching optimization of the remote sensor lens materials determinates the thermal adaptive faculty of the sensor, therefore become the most important influencing factor which will decide whether the sensor can work. This paper analyzed profoundly the change of the material’s thermal parameters caused by the working temperature variation, and studied the principles and application of the athermalization manners, whose advantages and disadvantages are also exposited. Formulas are listed to illustrate the principle of the athermatilization which is realized through the reasonable matching of different materials. Design example is represented, athermatilization is achieved through the reasonable matching of optical and mechanical compensation, utilizing the difference of thermal characteristics between different materials, the design and thermo-optical analysis result are also given in the paper, the advantage of the system is the stability in the wide temperature which has no use for groupware to adjust the position of detector .Key words: materials, thermal characters, remote sensor, athermatilization, optical and mechanical compensation

In order to verify the reliability of a calibration mechanism including a motion component used in the satellite, the dynamic analysis for this mechanism is conducted with modal coordinate reduction method. Firstly, FEM software ABAQUS is employed to calculate the eigenfrequency and mode shapes of this mechanism. Then, the transfer function at some key points can be acquired by coordinate transformation from its original format in modal coordinate. Finally, the power spectral density at the key points are obtained and compared with the results of random vibration experiments to prove the dynamics analytical validity.