| 摘要 |
<p>PROBLEM TO BE SOLVED: To reduce the edge light. SOLUTION: The surfaces 25 and 35 of a red lens where the overlapping portion 20 of its first lens 2 overlaps on the overlapping portion 30 of the second lens 3, are inclined. As a result, the light L penetrating the portion 20 of the first lens 2 is dispersed or flexed by the inclined surfaces 25 and 35 and does not become an edge light emitted from the forefront 26 of the portion 20. Because the thickness T2 of the forefront 26 of the portion 20 is made small, the edge light exposed from the forefront 26 toward the second lens 3 can be decreased. Thus the edge light from the forefront 26 of the overlapping portion 20 of the first lens 2 can be suppressed as much as practicable.</p> |
