Patent ID: 9019611
Filing Date: 2015-04-28
Classification: G01J,G01N,G02B

Abstract:
1. An optical module comprising: an interference filter including a first substrate having a first thermal expansion coefficient, a second substrate which faces the first substrate, a first reflection film which is formed on the first substrate, and a second reflection film which is formed on the second substrate and faces the first reflection film through a gap; and a fixing portion to which the first substrate of the interference filter is fixed, having a second thermal expansion coefficient which has a value different from the first thermal expansion coefficient, wherein the interference filter is fixed to the fixing portion by way of a first adhesive layer that is located outside of a transmission region of the interference filter, the first adhesive layer being formed on a surface of the first substrate that is opposite to a surface of a first reflection film side of the first substrate, a part of the interference filter is fixed to the fixing portion by way of a second adhesive layer that does not overlap the first adhesive layer, and a Young's modulus of the first adhesive layer is less than a Young's modulus of the second adhesive layer.