| 摘要 |
<p>An optical projection system which in a first implementation reflects illumination from a source (13) off of an electro-optic imaging member (10) in the shape of a plate. The imaging member (10) in the preferred embodiment is an electro-optic ceramic plate (12), such as PLZT, which is substantially transparent to visible light when not affected by an electric field or electron beam. The imaging member (10) is bonded to the front face-plate of a cathode-ray tube (32) which includes an electron beam generator (30), a controller (26) for modulating the intensity of the electron beam with an image and a raster scan generator (34) for scanning the beam across the front face of the tube. At spots where the electron beam strikes the electro-optic plate (12), the opalescence of the sport is changed in accordance with the scattering effect of the crystal and in dependence upon the intensity of the electron beam (36). The remnant image formed by the spots is changed a line at a time by first erasing a line with a selected strip-like electrode (64) and then by rewriting the blank line with the electron beam (36).</p> |
