A TV system for image recording and processing in conventional transmission electron microscopy

An image processing system for a CTEM is described which is particularly suited for the imaging of radiation-sensitive objects. It consists of an image intensifier device for single electron counting, a digital storage unit and a video recorder for intermediate storage of low-dose image series. During on-line operation the information can be transferred to a computer for further processing. The output can be transferred onto a second digital storage unit and observed on a monitor. The influence on the DQE of the pulse height distribution of the single electron video signals and of a multiple counting are eliminated by means of special electronic components. Various modes of operation and application possibilities of the image processing system are discussed.