| 摘要 |
The invention relates to a device for projecting holographically saved information onto a projection screen (17), comprising a light source (11-13) for creating a light beam; a medium (14-16) containing individual projected images, saved holographically in a first direction, one next to the other and a projection screen (17) which is configured in such a way that it receives the light beam projected onto it in the first direction and scatters said beam in a second direction which runs transversely to the first. The light source (11-13), medium (14-16) and projection screen (17) are positioned in relation to one another in such a way that the light beam from the light source (11-13) falls onto the medium (14-16) and the light beam which is diffracted holographically by said medium, is projected onto the projection screen (17). The invention also relates to a device for exposing a holographic medium, comprising individual projected images, arranged next to one another in a first direction on the medium, elements for generating an object light beam which contains information about the individual projected images, a projection lens for projecting the object light beam onto an imaginary projection screen and an element for the gradual, relative displacement of the object light beam and the medium towards one another in the first direction. |
