| 摘要 |
<P>PROBLEM TO BE SOLVED: To provide a vehicular headlamp small in lighting intensity irregularity. <P>SOLUTION: This vehicular headlamp has a projection lens 1, and a light source unit 3 equipped with a semiconductor light emitting element 2. The projection lens 1 is made of a methacrylic resin. The methacrylic resin comprises 85-98.5 wt.% of a methyl methacrylate monomer unit, and 1.5-15 wt.% of at least another kind of vinyl monomer unit copolymerizable with methyl methacrylate, wherein the weight-average molecular weight measured by gel permeation chromatography (GPC) is 60,000-200,000, and 7-25% of a weight-average molecular weight component not larger than 1/5 of a peak weight-average molecular weight (Mp) in a GPC elution curve is included. <P>COPYRIGHT: (C)2009,JPO&INPIT |
