DEVICE FOR THINNING TECHNICAL AND MICROSCOPIC SPECIMENS UNDER LAMINAR FLOW CONDITIONS

摘要

Device for electrochemically or chemically thinning technical and microscopic specimens, such as thin or microsections, under laminar flow conditions, comprising two jet nozzle systems on opposite sides of the specimen to be thinned, each nozzle consisting of a long, wide-lumen jet tube, each system having a central nozzle space which tapers inwardly toward the nozzle proper, with a concentric, annular channel disposed about each nozzle space, with a number of (preferably four) symmetrical overflow channels running from each annular channel to its nozzle space, a supply conduit linking each annular channel to a circulating pump. Polishing masks are applied to the specimen with the interposition of thin, soft sealing rings. The jet nozzle spaces may have windows, allowing observation during the thinning process, e.g. by the aid of a microscope.