Calibration devices, systems, and methods for calibrating a sensor. In one example a calibrator includes a housing, a dual-axis mirror positioning mechanism disposed within the housing, and a single calibration mirror coupled to the dual-axis mirror positioning mechanism and disposed within the housing, the dual-axis mirror positioning mechanism being configured to rotate the calibration mirror about a first axis to move the calibration mirror from a stowed position into a deployed position and, when the calibration mirror is in the deployed position, to rotate the calibration mirror about a second axis into a plurality of calibration positions, the first and second axes being orthogonal.