| 摘要 |
PURPOSE:To diffuse incident light over a wide range and to eliminate the color irregularity by composing a projection-surface lenticular lens of a projection-side main lens lenticular lens, a total reflecting surface, and a totally reflected light projection surface. CONSTITUTION:Light beams 11-12 among light beams 11-14 incident on a lens sheet 1 are refracted by a lens L2 to reach M7, reflected totally by the M7, and then emitted within a range Y. The light beams 12-13 are incident on and refracted by a lens L1, refracted by a lens L4, and emitted within a range X; and the light beams 13-14 are refracted by a lens L5, reflected totally; by M8, and emitted within a range Z. The range of the light beams 12-13 is the same as usual and an observation area ranges by + or -30 deg., i.e. 60 deg., in total about a normal 3 perpendicular to a lenticular lens sheet. The ranges Y and Z of projection light are set outside the range X at + or -(30-50) deg. to, for example, the normal to separate in-charge ranges preferably.
|
