| 摘要 |
PURPOSE:To improve the coil winding workability as well as the heat radiation effect by using a casting coil. CONSTITUTION:A casting coil is used to an optical system driver. When the casting coil of an objective lens holder is inserted, no flange is sometimes secured at all, or the flange of the objective lens holder remains only at one side. Then four lamination layers is included in a coil 22 and an optional number of turns is selected for the coil 22 as necessary. A fixing member 23 uses the polyimide resin, for example, which excels in the insulation properties and heat resistance. Then a casting coil 8 is fixed at the outer circumferential part of an objective lens holder 2. This simplifies the coil winding job and also improves the working efficiency of an optical system driver. |
