| 摘要 |
PROBLEM TO BE SOLVED: To provide a reflector with a curved surface having a high enhanced reflection effect.SOLUTION: A dielectric layer 23 comprising a plurality of layers disposed on a metal reflection surface 22 in a curved surface shape has a distribution of film thickness in accordance with an incident angle of a beam coming from a light source 10. The layer is formed in such a manner that the film thickness is large in an area 5 where the incident angle is large and the film thickness is small in an area 2 where the incident angle is small. For example, the film thickness L is constant in the direction of the major axis 6 of the beam coming from the light source 10. The dielectric layer has a structure of an enhanced reflection film. |
