Patent ID: 7733495
Filing Date: 2010-06-08
Classification: G01B,G01J,G02B

Abstract:
1. An optical multilayer mirror including a lower mirror and an upper mirror, the lower mirror being arranged over a substrate, the upper mirror facing the lower mirror via a gap, the lower mirror comprising: a first high refractive-index layer that is arranged over the substrate and features a first refractive index; a first low refractive-index layer that is arranged to face the first high refractive-index layer and features a second refractive index smaller than the first refractive index; a second high refractive-index layer that is arranged to cover the first low refractive-index layer; and a first reinforcing section that is configured to support a portion of the second high refractive-index layer covering a top surface of the first low refractive-index layer and reach the first high refractive-index layer via the first low refractive-index layer, the upper mirror comprising: a third high refractive-index layer that is arranged over the substrate and features the first refractive index; a second low refractive-index layer that is arranged to face the third high refractive-index layer and features the second refractive index; a fourth high refractive-index layer that is arranged to cover the second low refractive-index layer; and a second reinforcing section that is configured to support a portion of the fourth high refractive-index layer covering a top surface of the second low refractive-index layer and reach the third high refractive-index layer via the second low refractive-index layer, wherein the first reinforcing section included in the lower mirror corresponds to a first portion of the second high refractive-index layer, the first portion ranging between a portion opposed to the top surface of the first low refractive-index layer and a portion reaching the first high refractive-index layer by crossing the first low refractive-index layer, and wherein the second reinforcing section included in the upper mirror corresponds to a second portion of the fourth high refractive-index layer, the second portion ranging between a portion opposed to the top surface of the second low refractive-index layer and a portion reaching the third high refractive-index layer by crossing the second low refractive-index layer.