The working principle of the rotating mirror camera is based on the Miller principle for high-speed cinematography. The system employs a rotating three-faced mirror prism directing the incoming light to 128 optical channels arranged in a quarter arc. The image on the primary image plane of BRANDARIS 128 is relayed to the secondary image plane at the mirror surface by a set of relay lenses. Then the image is projected on the final image plane through a set of lenses contained in the lens bank. The image is recorded on 128 un-intensified high sensitivity CCD chips mounted on the image arc.