Baffle, especially the baffle with vanes, is a key element for stray light suppression of an optical system. In order to get well performance of stray light suppression, the long baffles are needed for some optical systems, such as Reflective Cassegrain System. However, the volume of the long baffle, which is not adaptive to the uses in the space environment, is too large. Therefore, a method of which the deployable structure is adopted in the baffle of the optical system is advanced innovatively. And a self-deployable baffle with vanes, which is able to stay in contraction state until it is working and deploy into long baffle state as required rapidly, is designed. The novel baffle in this paper is able to ensure good performance of the baffle with vanes and solve the problem of the baffle used in the space environment. Then, the performance of the tape spring is computed.
As the improvement of Astronomy technology, the size of the space optical system is developing toward huge type. However, the capability of the carriers of the space optical systems, which has got rid in the way of the development of the space optical system, is limited. To solve this problem, a self-deployable baffle is discussed, a method of the deployment utilizing elastic strain energy is advanced, and a new deployable baffle is designed in this paper. The baffle here consists of three or more sleeves, and each diameter of the sleeve is different in order to make the whole structure contract easily. The baffle is staying in contraction state until it is in the state of working. It is able to deploy into working state as required in a very short time. Well moving stabilization and high precision of deployment are ensured in this new style of deployable baffle. In order to reduce the mass of the baffle, every sleeve in the system uses the structure of thin board. As a result of the use of sleeve structure, the inner faces of the baffle are varied in each sleeve. To prove it is still effective in the optical system, professional software of ASAP is used to test its behavior. All the analysis and emulation prove that the baffle in working state is able to resist the stray light from the outside of the Field of View (FOV), improve the quality of the imaging, and meet the requirements of the optical system.