| 摘要 |
PURPOSE:To eliminate the generation of a moire due to interference of light and also to cause no light quantity shortage in the circumferential part by interposing a film whose light diffusing capacity is high between a Fresnel lens placed so that each lens face is opposed and a lenticular lens. CONSTITUTION:A Fresnel lens 2 and a lenticular lens 1 are placed so that each lens face is opposed, and also a film 7 whose light diffusing capacity is high is interposed between both the lenses 1, 2. The light which transmits the Fresnel lens 2 is diffused enough by the film 7, therefore, interference with an uneven stride 3a of the lenticular lens 1 scarcely occurs, and the generation of a moire is suppressed. Also, the lens face of the Fresnel lens 2 is faced to the outside with respect to light L, therefore, the light quantity shortage in the circumferential part is also eliminated. |
