Movable mirror unit

Abstract

Abstract PURPOSE: To make a rotary part light and make a minute rotation possible by arranging a coil part in the magnetic field formed between a yoke and plate and forming one of a pair of screw receiving parts in the core part as a V-shaped long groove. CONSTITUTION: Conical convex part 26 and V-shaped long groove 27 are formed as screw receiving parts on plane 33 in core part 12 which forms movable part 4, and plane 33 does not cover all of the reverse face of mirror substrate 22, and part 28 of the reverse face of substrate 22 is exposed. Then, coil part 7 is arranged in the magnetic field between yoke 3 and plate 29 which is formed by the magnetic path passing through permanent magnet part 2, yoke 3 and plate 29, and movable part 4 is rotated by the electromagnetic force of coil part 7. As a result, the movable part can be made light; and further, the rotation fulcrum can be determined clearly because the conical convex part and the V-shaped long groove are formed on the plane of the core part, so that the movable part can follow a minute change. COPYRIGHT: (C)1980,JPO&Japio

Inventors

• 👤 Yoshitsugu Araki

Bibliographic Details