Design and Analysis of Supporting Structure of Cubic Prism for Three-frame in High-speed Multi-frame Camera

High-speed multi-frame camera by which a lot of time series images with adequate spatial information can be obtained is widely used for recording in the process of wasting test. The non-kinematics supporting structure of the cemented cubic prism for three-frame in High-speed multi-frame camera is designed. The deformation of cubic prism with edge-length up to 112mm induced by gravity is calculated and the effect of the deformation on three-frame camera system is discussed. The deformation of the supporting structure of the cubic prism for three-frame under the gravity of cubic prisms and the lower-order modes are also calculated. The first natural frequency of the supporting structure of the cubic prism is better than 1000Hz, which indicates that the supporting structure of the cubic prism is with good stiffness and reliable. The research in this paper is favorable for the application of cubic beam splitter prism in high-speed multi-frame camera.