Rgb-ir sensor, and method and apparatus for obtaining 3d image by using same

An apparatus for obtaining a 3D image, the apparatus comprising:

• a light transmitting unit for emitting infrared ray (IR) structured light to a recognized object;
• a light receiving unit comprising an RGB-IR sensor for receiving infrared rays and visible light reflected from the recognized object;
• and
• a processor for obtaining 3D image information including depth information and a visible light image of the recognized object by using each of the infrared rays and the visible light, which are received by the light receiving unit,
• wherein the RGB-IR sensor includes a first pixel basic unit including one of each of R, G, B and IR pixels and a second pixel basic unit of which R, G, B and IR pixels are arranged in a different order from those of the first pixel basic unit, the RGB-IR sensor is comprised by alternately arranging the first pixel basic unit and the second pixel basic unit in a horizontal direction, and R, G, B and IR pixel arrangements in the first pixel basic unit and the second pixel basic unit are determined so that IR-pixels in the RGB-IR sensor are not arranged at equivalent intervals.