A device for controlling line of sight direction to be directed from an optical device toward a physical object, comprising: a tilt direction control section and a pan direction control section, the tilt direction control section comprising a first tilt mirror and a second tilt mirror, the first tilt mirror being capable of rotation in forward and reverse directions about a first rotational axis, the second tilt mirror being capable of rotation in forward and reverse directions about a second rotational axis, the second rotation axis extending in a direction that is perpendicular to the first rotational axis, the first tilt mirror being capable of reflecting a line of sight direction from the optical device towards the second tilt mirror or reflecting a line of sight direction from the second tilt mirror towards the optical device, the pan direction control section comprising a pan mirror, the pan mirror being capable of rotation in forward and reverse directions about a third rotational axis, and the third rotation axis extending in a direction that is substantially parallel to a line of sight direction running from the tilt direction control section toward the pan mirror, and wherein an angle α formed by the pan mirror and the third rotation axis is set in a range of 0° < α < 90°, the tilt direction control section is configured to be capable of scanning a line of sight direction with respect to a virtual surface formed by a rotational locus of the pan mirror, by rotating the first tilt mirror and the second tilt mirror, the tilt direction control section is configured to be capable of controlling tilt angle φ of the line of sight direction from the pan mirror to a physical object by rotating the first tilt mirror and the second tilt mirror, and the pan direction control section is configured to be capable of controlling pan angle θ of the line of sight direction from the pan mirror to the physical object, by rotating about the third rotational axis. a tilt direction control section and a pan direction control section, the tilt direction control section comprising a first tilt mirror and a second tilt mirror, the first tilt mirror being capable of rotation in forward and reverse directions about a first rotational axis, the second tilt mirror being capable of rotation in forward and reverse directions about a second rotational axis, the second rotation axis extending in a direction that is perpendicular to the first rotational axis, the first tilt mirror being capable of reflecting a line of sight direction from the optical device towards the second tilt mirror or reflecting a line of sight direction from the second tilt mirror towards the optical device, the pan direction control section comprising a pan mirror, the pan mirror being capable of rotation in forward and reverse directions about a third rotational axis, and the third rotation axis extending in a direction that is substantially parallel to a line of sight direction running from the tilt direction control section toward the pan mirror, and wherein an angle α formed by the pan mirror and the third rotation axis is set in a range of 0° < α < 90°, the tilt direction control section is configured to be capable of scanning a line of sight direction with respect to a virtual surface formed by a rotational locus of the pan mirror, by rotating the first tilt mirror and the second tilt mirror, the tilt direction control section is configured to be capable of controlling tilt angle φ of the line of sight direction from the pan mirror to a physical object by rotating the first tilt mirror and the second tilt mirror, and the pan direction control section is configured to be capable of controlling pan angle θ of the line of sight direction from the pan mirror to the physical object, by rotating about the third rotational axis.