FILM MIRROR DEVICE

摘要

PROBLEM TO BE SOLVED: To reduce man-hour and costs by reducing a thickness while securing rigidity. SOLUTION: A trapezoid frame body 2 where cross sections at a pair of opposed edges are nearly square frames and cross sections at the other pair of edges are nearly U-shaped frames 10 is prepared. A film mirror 14 is spliced to one surface side of the frame body 2 and an auxiliary plate 13 is spliced to the other surface side of the frame body.