Active confocal image acquisition apparatus and method of three-dimensional measurement using same
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United States of America Patent
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Jun 4, 2002
Grant Date -
N/A
app pub date -
Dec 15, 1999
filing date -
Mar 23, 1999
priority date (Note) -
Expired
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Abstract
An active confocal image acquisition apparatus includes a confocal image acquisition system and a liquid crystal panel. The liquid crystal panel is disposed in the confocal image acquisition system so that its elements are aligned with elements of the detector. The light transmittance of elements of the liquid crystal panel is adjusted so as to make the intensities of reflection of all pixels (the values attained when the parts reflecting light are at or near the focused position) as close to a predetermined level as possible. By this configuration and method of using it, the active confocal image acquisition apparatus can perform accurate measurement if there are high-reflectance and low-reflectance parts together in the measuring field.
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