Patent ID: 9746637
Date: 2017-08-29
CPC Classifications: B32B,G02B

Claim:
1. An apparatus for coupling a SiC reflex mirror, configured to mount a SiC reflex mirror having a cylindrical portion formed on each of a plurality of points on a rear surface thereof, to a mounting plate, the apparatus comprising: an insertion portion having a vertical portion having a curved shape or a hollow cylindrical shape and attached to inside of the cylindrical portion, and a horizontal portion integrally formed with the vertical portion and formed to cross the vertical portion; an adhesive provided at at least one of an outer surface of the vertical portion and an inner circumferential surface of the cylindrical portion, and configured to attach the insertion portion spaced apart from the cylindrical portion reflex mirror; a fixing portion provided at the mounting plate and having one end fixed to the horizontal portion with a region of fixation apart from the SiC reflex mirror, having another end fixed to the mounting plate, and configured to fix the SiC reflex mirror to the mounting plate in a state that the fixing portion does not reach the SiC reflex mirror by the insertion portion and the adhesive; and a coupling member configured to fix the fixing portion to the insertion portion, wherein the insertion portion is formed of a SiC material to prevent a deformation caused by a difference in thermal expansion coefficients between the SiC reflex mirror and the fixing portion, wherein the fixing portion includes: a bi-pod coupled to the mounting plate; a body to which the bi-pod is insertion-fixed partially or wholly; and a mounting portion extending from the body, and having a larger sectional area than the body, wherein the coupling member is formed to pass through the mounting portion and the horizontal portion, wherein the cylindrical portion of the reflex mirror and the fixing portion of the mounting plate are arranged to form an equilateral triangle based on a center of the SiC reflex mirror, respectively, and wherein Young' modulus of the adhesive is less than Young's modulus of the SiC material so that stress transfer due to the coupling force of the coupling member is attenuated by ductility of the adhesive.