| 摘要 |
PURPOSE:To form a curved surface large enough to converge wide-spread light and having a small curvature by integrating a mirror and its holder to reduce the geometrical moment of inertia of the holder, passing the light outside the holder and forming a mirror surface without any step. CONSTITUTION:Plural mirrors 3 are inserted into a mirror holder main body 4, and a fixing plate 5 is fixed to the main body 4 by a screw 6 to fix the mirror 3. Plural mirror surfaces are pressed on the contact surface of the fixing plate 5 to form one smooth mirror surface. The difference in thickness between the mirrors is absorbed by the compression of a metallic sheet 7 and the mirror main body. A mirror surface without any step is formed with plural mirrors, and the mirror and mirror holder are integrated and fixed. Consequently, the geometrical moment of inertia of the holder is reduced, a large-sized mirror surface without any step is formed, and a mirror having a small-curvature curved surface is formed. |
