BASE MATERIAL FOR OPTICAL REFLECTING MIRROR, OPTICAL REFLECTING MIRROR USING THE SAME, METHOD FOR MANUFACTURING THE BASE MATERIAL, AND METHOD FOR MANUFACTURING OPTICAL REFLECTING MIRROR

PROBLEM TO BE SOLVED: To provide a base material for optical reflecting mirror and an optical reflecting mirror which are small in thermal deformation and thermal distortion and high in precision even under the environment such as space where a temperature change is big, and to provide a method for manufacturing the base material and a method for manufacturing the optical reflecting mirror. SOLUTION: A C/C base material 1 which is the base of a metal layer 2 having an optical reflection surface 2a is provided with a layer 1b consisting of any C/C composite material of UD, felt, paper or a cloth using yarn having the number of filaments of ≤1000. Also, the C/C base material 1 is manufactured by including processes: (1) a base material 1a consisting of the C/C composite material is formed, (2) a surface layer 1b consisting of any C/C composite material of the UD, the felt, the paper or the cloth using the yarn of the number of filaments of ≤1000 so as to cover the surface of the base material 1a, so that a molding body constituted of the laminated body of the C/C composite material is manufactured and (3) the molding body is thermally treated at temperature within the range of 1,700°C-2,200°C and is graphitized. COPYRIGHT: (C)2005,JPO&NCIPI