| 摘要 |
An end line (71) of a shielding plate (7) is substantially parallel to a line segment that connects the starting point of a placement period of a prescribed mirror (141, 221) at one end in the width direction of a window (11, 21) and the ending point of the placement cycle of a prescribed mirror (141, 221) at the other end in the width direction of the window (11, 21), when viewing a mirror array (14, 22) from a direction substantially perpendicular to the window (11, 21). |
