A flexible support structure of space infrared detector is presented so as to reduce the impacts of mechanical vibration,
electromagnetic interference and temperature shift from outside environment. According to technical requirements of the
infrared detector, the flexible support structure is designed, which mainly consists of two components: one component is
planted in the outside of the infrared detector to shield electromagnetic wave called shield cover; the other component is
a soft rubber ring, which can connect the shield cover to bracket forming a flexible support. In order to demonstrate its
effectiveness on reducing vibration, parameter identification and dynamic analysis of this structure are carried out to
calculate the acceleration of detector under sine vibration with different frequency. Then a new type composite material
is used to produce the shield cover, which has some advantages such as lighter weight, higher stiffness and function of
electromagnetic shielding. Besides, the soft rubber ring is made of a special rubber called XM-31. Not only can this
rubber isolate the vibration, but insulate the heat, which will further improve the performance of detector. The flexible
support structure has an important application value in the field of infrared detection and imaging.
Space infrared cameras have been widely used for weather prediction, earth resource detection, military reconnaissance
and astronomy observation. In order to design and produce an excellent space camera, the optical and mechanical
structures of the camera are deeply investigated. Firstly, according to the technical targets and interface requirements for
infrared sensor, optical modulation transfer function (MTF) must be up to 0.65 in the central field and more than 0.55 in
the marginal field at the cut-off frequency of the optical system. Secondly, in accordance with the requirement of optical
system, the structure of body tube is designed and a new type of material- graphite fiber reinforced aluminium matrix
composite (Gr/Al composite) is used for the first time. The weight of Gr/Al composite body tube is 31.8% lighter than
that of Titanium alloy. Thirdly, in terms of the theory of modal analysis, the resonance frequencies and modal sharps of
body tube are acquired. The first order resonance frequency is 292Hz. Finally, the test of random vibration is conducted.
Experimental results indicate that optical and mechanical systems do not change after vibration test. Namely, the
research above suggests that space infrared camera has an important utility value in the space remote sensing field.