| 摘要 |
PURPOSE:To lower loss due to absorption, scattering, etc., and to improve the cost effectiveness by enhancing the durability of a reflection mirror for lasers to be used for high-output lasers to light. CONSTITUTION:Multilayered films are formed by alternately laminating high- refractive index materials 2 and low-refractive index materials 3 on the surface of a substrate 1. The high-refractive index materials 4 having a durability to light are used for the high-refractive index materials on the uppermost layer side of the multilayered films corresponding to the light incident side. As a result, the durability to the light on the uppermost layer side where the intensity of the light is high is enhanced and further, the same high-refractive index materials 2 as the high-refractive index materials of the reflection mirror for low output are used for the lower layer side where the light intensity is low, there the number of the film layers of the multilayered film is decreased and the absorption and scattering are suppressed. The reflection mirror for laser having the excellent cost effectiveness is thus produced. |
