| 摘要 |
PROBLEM TO BE SOLVED: To satisfactorily shield a luminous flux made obliquely incident on a microlens array, where the luminous flux is made nearly vertically incident on the main surface, without causing the reduction in a viewing angle and the brightness reduction in a displayed image on a screen, regarding a microlens array sheet functioning as a main component for a rear projection type display screen or the like. SOLUTION: The microlens array sheet includes; the microlens array 10 where many convex microlenses 1 are densely arranged on the main surface part, and a plurality of convex sub lenses 2 having curvature radius smaller than that of the microlens 1 are formed on the surface part of the microlens 1; and a luminous flux passing part 4 formed along each optical path formed by light made incident on each sub lens 2 while being nearly vertically to the main surface before being focused after transmitting through each sub lens 2. The microlens array sheet is equipped with a light shielding layer 3 for shielding a light beam shifting from the luminous flux passing part 4. COPYRIGHT: (C)2007,JPO&INPIT
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