Camera for measuring depth image and method of measuring depth image using the same

A time-of-flight (TOF) depth camera comprising:

• an illumination device configured to illuminate a patterned light to an object, the patterned light comprising a plurality of spots;
• a filter device configured to reduce noise light included in light reflected by the object;
• and
• an image sensor providing a depth image of the object,
• wherein the patterned light comprises a plurality of spots, light amount distribution of the patterned light is not uniform on a surface of the object when the patterned light is arrived at the object and a light energy density of each of the plurality of spots is high relative to a light energy density of a surrounding region of the each spot,
• wherein the image sensor is configured to:
• receive light that enters through the filter device;
• measure a phase delay of the received light;
• measuring distances from the TOF depth camera respectively to regions of the object corresponding to the plurality of spots, based on the measured phase delay;
• and
• provide the depth image of the object, based on the measured distances, and
• wherein the filter device comprises a band pass filter.