Optics: measuring and testing – Shape or surface configuration – Triangulation
Reexamination Certificate
2007-03-20
2008-07-15
Nguyen, Sang (Department: 2886)
Optics: measuring and testing
Shape or surface configuration
Triangulation
C356S618000
Reexamination Certificate
active
07400413
ABSTRACT:
A 3D shape measuring apparatus using a shadow moire, which can measure a 3D shape of a test object by selectively switching on/off a plurality of illuminating parts irrespective of a form of the test object is provided. The 3D shape measuring apparatus using the shadow moire includes a grating110, a grating moving part120, a beam splitter part130being provided above the grating110to direct a first light source towards the grating110or pass a reflected image of a test object102reflected via the grating110, a subsidiary illuminating part140being provided on one surface of the beam splitter part130to emit the first light towards the beam splitter part130, an image sensor150being provided above the beam splitter part130to take the reflected image having passed through the beam splitter part130, a plurality of illuminating parts160being inclined a predetermined angle of the viewing axis of the image sensor140to be positioned above the grating110and to be spaced apart from each other with an equivalent angle and emit a second light towards the grating110, and a control part170controlling the grating moving part120, the subsidiary illuminating part140, the image sensor150, and the plurality of illuminating parts160, and thereby, transferring the image which is captured by the image sensor150, in order to calculate a 3D shape of the test object102, and controlling the plurality of illuminating parts160to be selectively switched on/off according to a shape of the test object102.
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Jeon Moon Young
Yun Sang Kyu
Koh Young Technology Inc.
Nguyen Sang
Rosenberg , Klein & Lee
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