A high density optical information recording medium comprises a substrate having rows of land and groove and a recording layer formed on the substrate. The controller includes a reference input, a retro-action input whereon is applied the measured magnitude and an output producing the control signal. The drive circuit has a logic circuit with a first input receiving the output signal of the comparison signal of the comparison circuit, and a second input receiving a trigger clock signal with a fixed frequency. The device further includes first and second elongate anchoring elements disposed on the first and second branch members, and optionally can include at least one centering mechanism disposed within each of the first and second anchoring elements.