An apparatus for angular positioning of a mirror, the apparatus comprising: a first mirror; a first motor configured to rotate the first mirror; a first detector configured to detect a rotational angle of the first mirror; and a first controller configured to: supply electric current to the first motor so that the rotational angle of the first mirror reaches a target angle; and estimate, based on a model representing a relationship between a value of electric current to be supplied to the first motor and an angle of inclination of the first mirror, the angle of inclination of the first mirror in a case where electric current is supplied to the first motor, wherein the angle of inclination of the first mirror is an angle at which the first mirror inclines with respect to a central axis of a rotating shaft included in the first motor; a second mirror; a second motor including a rotating shaft perpendicular to the rotating shaft of the first motor, and configured to rotate the second mirror; a second detector configured to detect a rotational angle of the second mirror; and a second controller configured to: supply electric current to the second motor so that the rotational angle of the second mirror reaches a target angle; and wherein the second controller is configured to control, based on the estimated angle of inclination of the first mirror, the rotational angle of the second mirror so that a phase difference between the angle of inclination of the first mirror and the rotational angle of the second mirror is 180°. a first mirror; a first motor configured to rotate the first mirror; a first detector configured to detect a rotational angle of the first mirror; and a first controller configured to: supply electric current to the first motor so that the rotational angle of the first mirror reaches a target angle; and estimate, based on a model representing a relationship between a value of electric current to be supplied to the first motor and an angle of inclination of the first mirror, the angle of inclination of the first mirror in a case where electric current is supplied to the first motor, wherein the angle of inclination of the first mirror is an angle at which the first mirror inclines with respect to a central axis of a rotating shaft included in the first motor; supply electric current to the first motor so that the rotational angle of the first mirror reaches a target angle; and estimate, based on a model representing a relationship between a value of electric current to be supplied to the first motor and an angle of inclination of the first mirror, the angle of inclination of the first mirror in a case where electric current is supplied to the first motor, wherein the angle of inclination of the first mirror is an angle at which the first mirror inclines with respect to a central axis of a rotating shaft included in the first motor; a second mirror; a second motor including a rotating shaft perpendicular to the rotating shaft of the first motor, and configured to rotate the second mirror; a second detector configured to detect a rotational angle of the second mirror; and a second controller configured to: supply electric current to the second motor so that the rotational angle of the second mirror reaches a target angle; and wherein the second controller is configured to control, based on the estimated angle of inclination of the first mirror, the rotational angle of the second mirror so that a phase difference between the angle of inclination of the first mirror and the rotational angle of the second mirror is 180°. supply electric current to the second motor so that the rotational angle of the second mirror reaches a target angle; and wherein the second controller is configured to control, based on the estimated angle of inclination of the first mirror, the rotational angle of the second mirror so that a phase difference between the angle of inclination of the first mirror and the rotational angle of the second mirror is 180°.