Apparatus for operating optical-reflector and apparatus and method for controlling position of optical-reflector

An apparatus for controlling a position of an optical-reflector, comprising:

• a housing;
• a first carrier accommodated in the housing and configured to rotate based on a first direction perpendicular to an optical axis with respect to the housing;
• a lens;
• a second carrier having an optical-reflector for reflecting a light toward the lens and accommodated in the first carrier to rotate based on a second direction perpendicular to both the optical axis and the first direction with respect to the first carrier;
• first and second magnets provided to the second carrier at different positions, the first and second magnets having the same pole or different poles at surfaces facing the first and second hall sensors;
• a first hall sensor configured to output a first signal corresponding to the position of the first magnet;
• a second hall sensor configured to output a second signal corresponding to the position of the second magnet;
• an input unit configured to receive the first signal from the first hall sensor and the second signal from the second hall sensor;
• and
• a signal generating unit configured to calculate the first signal and second signal input from the first and second hall sensors to generate a position signal that is a signal about a current position of the second carrier and,
• wherein, when the first and second magnets have the same pole at the surfaces facing the first and second hall sensors, the signal generating unit generates the position signal by doing a subtraction to the first and second signals;
• and
• when the first and second magnets have different poles at the surfaces facing the first and second hall sensors, the signal generating unit generates the position signal by doing an addition to the first and second signals.