| 摘要 |
PROBLEM TO BE SOLVED: To attain clear display of a picture printed on a film including change of the picture and stereoscopic moving pictures by periodically displacing a picture carrying film which is displaceable and is light-weight so as to cross a lens of a panel. SOLUTION: The lens-shaped panel l contains a cylindrical lens 2 of a front side thereof and a rib 4 of a rear side thereof. The panel 1 is a little arch- shaped in a direction crossing respective axial lines of the lens 2 at right angles. A light-weight film 6 is disposed in a state where it is spread at a protruding shaped rear side of the panel 1 and further is joined by four springs, for example. Tabs 16 having slots 18 are provided at each of upper and lower rulers 12 and a pin 20 is fixed to the panel 1 by penetrating the slot. Combination of the slot 18 and the pin 20 forms a guide means to the film 6 and secures accurate migration along the panel 1. Further proper conformity between the film 6 and the lens 2 under changing temperature is secured. |
