| 摘要 |
PURPOSE:To reduce the sharpness of Q of composite resonance, and to stabilize a controlling function by interposing a vibration absorbing layer to suppress the resonance, generated at bobbin at the time when a current is made to flow in respective coils, between the bobbin, and a focusing coil and/or a radial coil. CONSTITUTION:In an objective lens driving device 1; the vibration absorbing layer 20, which consists of an electric body for suppressing the resonance, generated at the objective lens holding bobbin 12 at the time when the electricity is made to flow in the respective coils, is formed between the objective lens holding bobbin 12, and the focusing coil 13 and the radial coils 14, 15, etc. Here, the assembly of the objective lens holding bobbin 12 can be formed by an upper mentioned procedure. Namely, the vibration absorbing layer 20 is formed beforehand around the outer circumferential surface of the objective lens holding bobbin 12, and afterward, the focusing coil 13 and the radial coils 14, 15, wound by other process, are successively adhered and fixed to the outer circumferential surface of the vibration absorbing layer 20. Accordingly, the objective lens driving device, stable in a controlling function, can be obtained. |
