| 摘要 |
<p>The appliance is for corpuscular optics, and projects a picture onto an object using subsequent programmed drawings of picture elements. It has a first object plane, in which a first screen emerges, to eliminate part of the beam produced by the optics. A first optical system forms a real image in a second object plane, with a predetermined enlargement from this screen. The second plane contains a second screen, this and the real image forming an imaginary screen. First electrically controlled deflexion units are located between the first and second object planes, so that they displace the real image in the first plane in a programmed way, and alter the shape of the imaginary screen. A second optical system forms the real image of the imaginary screen on the object. Second electrically controlled deflexion units displace the real image on the object.</p> |
