Laser beam trajectory sweep system, for sectioning organic tissue in surgery, comprises flexible membrane onto which laser beam is projected, and pressure applicator, for regulating curvature of membrane

摘要

The laser beam sweep system includes, a flexible stretched membrane (5) onto which the laser beam is projected and reflected to a focal point (4), twin pressure applicator for regulating the curvature of the membrane and a system for cooling the membrane. One part of the membrane curvature system applies pressure over the whole of it and the other applies a concentrated pressure. The overall membrane pressure applicator varies the pressure inside a closed chamber (8) delimited by the membrane. The concentrated pressure applicator is an electrical circuit (16) generating a DC voltage (17) or AC voltage between the membrane (3) and an electrode (15) adjacent to a central part of the membrane. The membrane cooling system includes a blower which projects gas onto a face of the membrane, the blower has a gas recycling circuit (10,11,12) for the gas in the closed chamber (8).