| 摘要 |
PURPOSE:To widen a view range, and also to improve a contrast by forming alternately a lenticular lens with a lens unit provided with a total reflecting surface and its connecting surface, in an observation side, and providing adjacently with a lens unit which causes no total reflection, in a projection side. CONSTITUTION:A lenticular lens is formed on an observation side S and a projection side L, respectively. The lenticular lens of the observation side S consists of a lens unit 1 which is provided with a total reflecting surface on both sides and has a top surface 12, and a connecting surface 2 for connecting this lens unit 1. On the other hand, as for the lenticular lens of the projection side L, a lens unit which causes no total reflection is provided continuously. The relation f both the lens units 1, 3 is designed so that the light which is made incident from the lens unit 3 of the projection side L is condensed and emitted from the range of the lens unit 1 of the observation, namely, between H and L, so that the connecting surface 2 is reduced to a non-transmission part. |
