Patent ID: 8310585

Claim:
A method for finding a range, the method comprising: emitting a light pulse to a measurement space and detecting reflected incident light reflected by an object to obtain location information and distance information of the object; varying a direction in which the light pulse is emitted to obtain location information and distance information of the object; inputting an operating mode; varying at least one of a frequency of the light pulse, a displacement velocity in the direction in which the light pulse is emitted, and a displacement range in the direction in which the light pulse is emitted depending on the operating mode to obtain location information and distance information of the object; performing at least one of decreasing a displacement velocity in a horizontal direction parallel to the direction in which the light pulse is emitted, decreasing a displacement velocity or a displacement range in a vertical direction perpendicular to the direction in which the light pulse is emitted, and decreasing a pulse frequency of the light pulse when the operating mode is a long distance measurement mode; and performing at least one of increasing a displacement velocity in a horizontal direction parallel to the direction in which the light pulse is emitted, increasing a displacement velocity or a displacement range in a vertical direction perpendicular to the direction in which the light pulse is emitted, and increasing a pulse frequency of the light pulse when the operating mode is a short distance measurement mode.