Patent ID: 7830528

Claim:
A 3D measuring apparatus comprising: a stage supporting an object; a projection portion comprising: a first light source and a second light source generating a light, a first lattice and a second lattice disposed to pass the light generated by the first and second light sources respectively therethrough, a movement instrument controlling the first and second lattices through a predetermined number of movement actions, and a first projection lens and a second projection lens receiving the light from the first and the second lattices, respectively, to alternately project the light towards the object at least once for each movement action with respect to the movement instrument, and an imaging portion comprising: an imaging lens receiving a plurality of first reflected lights and a plurality of second reflected lights reflected by the object alternately, and a camera capturing a plurality of first images and a plurality of second images, having passed through the imaging lens, and a control device calculating a first 2D image and a second 2D image with respect to the object, the control device distinguishing shadow and bright areas to generate compensation corresponding thereto, based on respective average values of the first images and the second images, the control device thereby acquiring a 3D information with respect the object.