Patent ID: 7400413
Filing Date: 2008-07-15
Classification: G01B

Abstract:
1. A 3-dimensional (3D) shape measuring apparatus using a shadow moire comprising: a grating moving part comprising a grating moving member which is installed with a grating, a grating moving actuator which connects with the grating moving member and moves the grating moving member, and a linear guide which guides the grating moving actuator; a beam splitter part being provided above the grating moving part, and comprising a filter, a lens, and a beam splitter; a subsidiary illuminating part being provided on one side of the beam splitter part to emit a light towards the beam splitter part; an image sensor receiving taking a reflected image passed through the beam splitter part; a plurality of illuminating parts being inclined at a predetermined angle of the viewing axis of the image sensor, each of the plurality of illuminating parts comprising a light source, a lens, and a filter; the plurality of illuminating parts being selectively operable to simultaneously illuminate the grating; and a control part controlling the grating moving part, the subsidiary illuminating part, the image sensor, and the plurality of illuminating parts, and thereby, transferring the image which is received by the image sensor, in order to calculate a 3D shape of a test object, and controlling the plurality of illuminating parts to be selectively switched on/off according to a shape of the test object.