Detecting apparatus and method of robot cleaner

A robot cleaner, comprising:

• a detecting apparatus capable of detecting a floor on which the robot cleaner moves, the detecting apparatus comprising:
• a detecting unit provided with a transmitting unit for sending a signal to detect the floor and a receiving unit for receiving the signal sent from the transmitting unit;
• an optic angle adjusting unit disposed at at least one of the transmitting unit and the receiving unit and configured to form optic angles of the signals;
• a light shielding unit configured to partially shield a signal sent through the optic angle adjusting unit by shielding a peripheral portion of the signal in order to reduce a measurement deviation between the transmitting unit and the receiving unit;
• and
• a light amount adjusting unit configured to feedback an amount of light received at the receiving unit to adjust an amount of light sent from the transmitting unit,
• wherein the light shielding unit is configured to partially shield the optic angle adjusting unit, and shield the optic angle adjusting unit by a certain length from an outer side of the optic angle adjusting unit to an inner side thereof.