Abstract: Examples of the disclosure relate to apparatus for providing control signals to an adjustable mirror in optical systems such as laser scanning systems. The optical systems could be LiDAR systems or optical coherence tomography (OCT) systems or any other suitable systems. The apparatus comprises means for providing a control signal to at least one adjustable mirror to control movement of the at least one adjustable mirror where the at least one adjustable mirror is provided within a laser scanning system. The control signal comprises a multi-step signal where step widths of the multi-step signal are based on half of a period of oscillation of the at least one adjustable mirror.