Patent ID: 8325350

Claim:
An apparatus for measuring a three-dimensional shape, comprising: a transfer stage transferring a measurement object to a measurement position; a first projector irradiating a first pattern light having a first equivalent wavelength toward the measurement object in a first direction; a second projector irradiating a second pattern light having a second equivalent wavelength that is different from the first equivalent wavelength toward the measurement object in a second direction; a camera unit taking a first pattern image that is generated when the first pattern light is reflected by the measurement object, and a second pattern image that is generated when the second pattern light is reflected by the measurement object; and a control unit controlling the first projector and the second projector, and measuring a three-dimensional shape of the measurement object through the first pattern image and the second pattern image, wherein the control unit obtains a first phase and a second phase through the first pattern image and the second pattern image, which are taken by the camera unit, obtains a third phase using the first equivalent wavelength and the second equivalent wavelength, and obtains unified height information by using the first phase, the second phase and the third phase.