| 摘要 |
<p>This invention relates to a composite optical element, especially a composite optical element wherein second and third optical sections are coupled to a first optical section. In the composite optical element, optical characteristics are improved. A composite optical element (1) is provided with first, second and third optical sections (10, 20, 30). The first optical section (10) has a lens surface (13). The second optical section (20) is coupled to the first optical section (10) on the lens surface (13), and is provided with a lens surface (22) on a side opposite to a first coupling surface (21) which is coupled to the first optical section (10). The third optical section (30) is coupled to the second optical section (20) on the lens surface (22), and is provided with a lens surface (32) on a side opposite to a second coupling surface (31) which is coupled to the second optical section (20). On a part of the lens surface (13), a first uneven surface section (13a) exists, on a part of the lens surface (22), a second uneven surface section (22a) exists, and on a part of the lens surface (32), a third uneven surface (32a) exists.</p> |
