Moire image capturing apparatus and method therefor
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United States of America Patent
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Jul 13, 2004
Grant Date -
N/A
app pub date -
May 30, 2000
filing date -
May 29, 1999
priority date (Note) -
Expired
status (Latency Note)
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Abstract
The present invention relates a moire image capturing apparatus and the related method, the apparatus comprising: an optical projection unit arranged in perpendicular to a reference surface with a light source for illuminating light to the reference surface, where an object is positioned, and a projection grating installed on a optic axis between the light source and the reference surface for projecting the light generated by the light source toward the object; and an optical imaging unit arranged in perpendicular to the reference surface with an imaging lens for making an image with the light reflected at the object and a light receiving part installed on the same optic axis as that of imaging lens for receiving the light passing through the imaging lens to turn into a moire image, so that a reference grating is removed to make the apparatus in a simpler structure and that a step of removing an image of the reference grating except the moire image having information on figure of the object is not included in the method for capturing the moire image, thereby making a moire image capturing apparatus cheaper in a simpler structure.
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