Rotary polyhedral mirror

Abstract

Abstract PURPOSE:To easily obtain a polyhedral mirror which is light in weight and does not cause any distortion and the like through high speed revolution by forming a revolving body of high mechanical strength with a glass fiber reinforced resin or the like, forming resins of high smoothness to the outside circumference of the revolving body into two colors to form flat surfaces, and forming metallic reflection films on the flat surfaces. CONSTITUTION:A rotator body 1 of high mechanical strength of a thermoplastic resin contg. fibrous, fillers such as glass fibers, carbon fibers or various kinds of inorg. fillers, or a thermosetting resin or the like of high rigidity is formed. This body 1 has a shaft hole 2 at the center, and is formed with eight faces of plane parts 3 and each eight places of recesses 4 for the purpose of thickness reduction on both sides. Next, this body 1 is put into metallic molds, and is fixed by holding surfaces 5, thence a resin 6 (acrylic resin, polycarbonate resin or the like) of good smoothness is filled to form these into one body, thereby forming smooth surfaces 7. Next, a metal is vapor-deposited on the surfaces 7 to form metallic reflection films 8, thereby providing reflection surfaces 9. In this way, the rotary polyhedral mirror which permits the high speed revolution despite the small output of a driving part and does not cause distortion of the reflection surfaces 9 is obtained with good productivity.

Inventors

• 👤 Tadashi Kato

Bibliographic Details