| 摘要 |
PURPOSE:To obtain the rotary polygon mirror having a high quality with high efficiency by bringing a fitting reference surface of a polyhedral shape base body to semi-specular working, bringing plural base bodies into adherence and contact with each other through the reference surface, bringing the polygonal surfaces to simultaneous specular finish working, and thereafter, separating the base body by an ultrasonic wave in a liquid. CONSTITUTION:Fitting reference surfaces 2 of both sides of a polyhedral shape base body 1 are worked to semi-specular surfaces, and plural base bodies 1 are brought into adherence and contact with each other through this surface 2. In this state, polygonal surfaces 4 are cut simultaneously and brought to specular finish, and when each base body 1 is separated by irradiating the separating part by an ultrasonic wave in a liquid, the rotary polygon mirror having the high quality is generated with the high efficiency. |
