Light transmitting member driving device for a contour measuring apparatus
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United States of America Patent
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Nov 12, 2002
Grant Date -
N/A
app pub date -
Aug 30, 2001
filing date -
Aug 30, 2001
priority date (Note) -
Expired
status (Latency Note)
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Abstract
A three-dimensional measuring apparatus or similar contour measuring apparatus of the present invention includes a projector for emitting light, a lattice film or similar light transmitting member, and a camera. Light issuing from the projector is transmitted through the lattice film to illuminate an object to be measured. The lattice film is movable to a plurality of projecting positions in a preselected direction. The camera shoots the object being illuminated by the light. A driving device for driving the lattice film includes a cam follower associated with the lattice film, and a cam for guiding the cam follower. The cam has a cam surface including a plurality of contiguous, insensitive portions each for causing the lattice film to remain in a halt at a particular position when the cam follower contacts the insensitive portion.
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