| 摘要 |
PCT No. PCT/DE94/00342 Sec. 371 Date Jan. 22, 1996 Sec. 102(e) Date Jan. 22, 1996 PCT Filed Mar. 25, 1994 PCT Pub. No. WO94/23340 PCT Pub. Date Oct. 13, 1994An optical system for the two- and three-dimensional representation of information by the use of transmission displays for the computer and video technology, for head-up displays for aviation and space flight, in advertising and presentation, in medical engineering, in the field of virtual reality and in other fields comprises: a light-source arrangement with at least one point or line source of light, a collimating optics for rendering the light parallel, a transmission display, a prism mask with prisms in a matrix arrangement, the prisms having two different prism angles, a field lens as a focussing optics as well as a phase mask. The image can be well seen by several viewers without any aid, the viewers being able to move laterally and vertically as they like. It is possible to offer two different TV programs to two or more persons at the same time. If all the viewers watch the same program, no sequential switching-over is necessary. An arrangement is possible such that the viewers see only the information intended for them (for example, cash dispensers, confidential information).
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