| 摘要 |
PROBLEM TO BE SOLVED: To provide an optical element having an effect of reducing the occurrence of coloring undesirable for visual sensation due to the iridescent hues arising in striation which is heretofore problems. SOLUTION: The optical element has a highly luminous light source, an imaging lens for imaging the same and a light source image, is arranged in any part from the front of the imaging lens to the light source image and generates the striation in the highly luminous light source. The optical element is constituted to have optical dark parts of at least two kinds of line widths. COPYRIGHT: (C)2004,JPO
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