| 摘要 |
PURPOSE:To preclude the necessity of giving precision to the fitting of the pickup driving mechanism, by providing three pickup driving coils in the optical disc reproducing device. CONSTITUTION:Coils 8 and 9 are provided symmetrically to each other with respect to the line connecting the center of coil 7 with the center of the pickup. Control signals Ef-Et are mixed as desired at a proper polarity and ratio so that the error such as the fitting error of the voice coil is corrected, and they are applied to respective coils. |
