The present invention relates to a production security control apparatus for software products and the control method thereof. According to the thus constituted optical recording medium, it is possible to decrease a noise level and improve a CN ratio in a reproduced signal. The other electrode of the capacitor is connected to a reading word line. A selection tripper lying on top of the center tripper, has four branches that each lies under one of the actuator feet. The spacer spans substantially entirely across a cross section of the segment of the bundle in one direction. The controller calculates an image density difference between the density detection patterns on a basis of a detection result obtained by the detector, and corrects a transfer bias for transferring a toner image on a basis of a value of the image density difference.