Apparatus and method for determining three-dimensional shape of object

An apparatus for determining a first three-dimensional shape of an object located on a reference plane, comprising:

• one or more first light sources configured to irradiate one or more first patterned lights to the object;
• a second light source configured to sequentially irradiate one or more second patterned lights having one phase range;
• a first iris configured to pass the one or more second patterned lights irradiated from the second light source toward a beam splitter;
• the beam splitter and one or more lenses configured to change optical paths of the one or more second patterned lights passing through the first iris so that a beam of light corresponding to a respective phase of the phase range spreads, and arrives at each point of a partial region of an upper surface of the object;
• a second iris configured to pass one or more second reflected lights, generated by the reflection of the one or more second patterned lights from the partial region, toward an image sensor;
• the image sensor configured to capture one or more first reflected lights generated by reflecting the one or more first patterned lights from the object and the one or more second reflected lights passing through the second iris;
• and
• a processor that is electrically connected to the one or more first light sources, the second light source and the image sensor, and that is configured to determine the first three-dimensional shape of the object based on the one or more first reflected lights and the one or more second reflected lights.