| 摘要 |
<p>PROBLEM TO BE SOLVED: To increase a driving response speed by driving only an objective lens, thereby making it possible to adjust the relative inclination of the objective lens and a disk. SOLUTION: When currents are impressed to tilting coils 71 of an inclination correcting means 70, the directions of the currents flowing to upper and lower parts 71a, 71b are opposite to each other, and since both are positioned within the magnetic fields of different polarities of the two tilting magnets 73a, 73b, the upper and lower parts 71a, 71b come to receive forces upward and downward at the same time. The inclination of the objective lens 65 may be adjusted by regulating the direction and strength of the currents to be impressed on the tilting coils 71. At this time, the inclination of the objective lens 65 is the radial direction of the disk is regulated by impressing the currents, in such a manner that the force acts in the different coils direction of the tilting coils 71 respectively disposed at a pair of the second flanks 63. Meanwhile, the directions of the current flowing in both side parts 71c, 71d are opposite to each other, and therefore, the forces acting on these parts are offset with each other.</p> |
