Optical apparatuses and method of collecting three dimensional information of an object

A method of collecting three dimensional information of an object, comprising:

• receiving a first light beam of a first wavelength range through a first aperture of a mask in accordance with light reflected from the object;
• and
• receiving a second light beam of a second wavelength range through a second aperture of the mask in accordance with the light reflected from the object,
• wherein the second aperture is separated from the first aperture by the mask.

An optical apparatus of collecting three dimensional information of an object, comprising:

• an optical detector detecting a first light beam of a first wavelength range and a second light beam of a second wavelength range different from the first wavelength range;
• and
• a mask comprising:
• a first optical module directly providing the first light beam in accordance with light reflected from the object to the optical detector;
• and
• a second optical module directly providing the second light beam in accordance with light reflected from the object to the optical detector.