MICROLENS ARRAY AND ILLUMINATION DEVICE
To provide a microlens array and an illumination device that are not affected easily by machining precision and assembly precision and can obtain uniform and desired light distribution characteristics.SOLUTION: For a unit comprising one portion of a truncated cone or an elliptic cone virtually defin...
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Sprache: | eng ; jpn |
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Zusammenfassung: | To provide a microlens array and an illumination device that are not affected easily by machining precision and assembly precision and can obtain uniform and desired light distribution characteristics.SOLUTION: For a unit comprising one portion of a truncated cone or an elliptic cone virtually defined in a top part, a bottom part, and a side part, the center of a circle, or a top part of an oval of the unit is arranged in a hexagonal lattice shape within a two-dimensional plane. For the side part of the unit expanding in a cone shape toward the bottom part side from the top part side, each boundary of one unit, and six units surrounding the periphery is defined by a ridge line or a valley line, and the respective adjacent units are disposed densely to the extent that a planar view of the unit becomes hexagonal by the ridge line or the valley line defining the unit.SELECTED DRAWING: Figure 1
【課題】加工精度や組み立て精度に影響を受けにくく、均一且つ所望の配光特性を得られるマイクロレンズアレイ及び照明装置を提供すること。【解決手段】頂部、底部及び側部で仮想的に定義される円錐台又は楕円推台の一部分からなる単位ユニットを、その単位ユニットの円形又は楕円形の頂部の中心が2次元平面内で六方格子状に配列し、前記頂部側から前記底部側に向かってコーン形状に広がる前記単位ユニットの側部は、1の単位ユニットと、その周囲を取り囲む6つの単位ユニットが尾根線又は谷線により各境界が区画され、前記単位ユニットの平面視が前記単位ユニットを区画する尾根線又は谷線により六角形状となる程度に、隣接する前記各単位ユニット同士が密に配置されてなる。【選択図】図1 |
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