Distance measuring device and distance measuring method thereof

The invention discloses a distance measuring device and a distance measuring method thereof. The distance measuring device comprises a light source emitter, a sensor and a correction unit, wherein the light source emitter is used for emitting detection light; the sensor is used for sensing reflected light to generate an image; the detection light is reflected by an object to form the reflected light, and the at least one feature lookup table is pre-established according to a specific object. The distance measuring device can restrain imaging disturbance and distance disturbance, and can improve distance measuring accuracy. 本发明公开测距装置及其测距方法，所述测距装置包括用以发射一侦测光的一光源发射器、用以感测一反射光而产生一成像的一传感器、以及用以根据至少一特征查找表进行校正而根据该成像输出一距离值的一校正单元。该侦测光在一对象反射而形成该反射光，该至少一特征查找表是根据一特定对象而预先建立。测距装置可抑制成像扰动及距离扰动，而能提高测距精确度。