| 摘要 |
Apparatus for projecting and back-projecting slides with lap-dissolve (cross-fade) effect, using a single slide-magazine. In a first operating mode, the apparatus, which employs two light sources 1, 2 and a moving plane mirror 7, enables the slides to be projected through a first objective towards an external screen with lap-dissolve (cross-fade) effect. In a second operating mode, the apparatus enables the slides to be back-projected, still with lap-dissolve (cross-fade) effect, onto a built-in ground-glass screen and through a second objective 9. In a third, hybrid, operating mode, the slides are projected as in the first mode towards the external screen, whereas the built-in screen enables the slide following that projected to be presented. Application to audio-visual techniques. <IMAGE>
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