Patent ID: 7852716
Filing Date: 2010-12-14
Classification: G11B

Abstract:
1. An optical disk drawing apparatus for drawing an image on a drawing layer formed in an optical disk, the apparatus comprising: a rotating unit that rotates the optical disk; an optical pickup that irradiates laser light onto the optical disk and produces a light reception signal based on reflection light reflected from the optical disk; a feeding unit that relatively moves the optical pickup with respect to the optical disk; a focus servo controller that sets a focus servo gain, controls a gain of a signal produced based on the light reception signal according to the set focus servo gain and perform a focus servo control so that a focal point of the laser light output from the optical pickup is focused on the drawing layer based on the gain-controlled signal; a judging unit that detects a position of the optical pickup moved by the feeding unit and judges whether or not an irradiation position of the laser light from the optical pickup is located within an adjusting area, the adjusting area being a predetermined area on the drawing layer formed on the optical disk; and a drawing controller that causes the focus servo control to set the focus servo gain when a judgment result made by the judging unit is positive, and thereafter permit a drawing operation of irradiating the laser light onto the drawing layer to form the image on the drawing layer in the event that the focus servo gain has been set by the focus servo controller and the judgment result made by the judging unit is negative.