发明名称 |
Three-dimensional shape measuring apparatus |
摘要 |
A three-dimensional shape measuring apparatus includes a projection device having a projecting plane witha grating pattern formed therein and a light source for illuminating, through the projection plane, an object of interest located at an arbitrary position in the same three-dimensional coordinate system as that of the projection device, an observation device located in the same three-dimensional coordinate sysem as that of the object and having an observation plane and a specific point located between the observation plane and the object. In the apparatus, the grating pattern in the projection plane is projected on a surface of the object to form a projected grating pattern thereon when the light source is turned on, the grating pattern projected on the object is observed in the observation plane. The three-dimensional coordinates of an arbitrary sample point on the projected grating line on the object are determined by utilizing the fact that a sample point on the object is an intersection between a light ray emitted from the light source of the projection device and illuminating the sample point on the object and a line including the specific point of the observation device and the sample point in the observation plane, thereby measuring a three-dimensional shape of the object.
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申请公布号 |
US4802759(A) |
申请公布日期 |
1989.02.07 |
申请号 |
US19870082815 |
申请日期 |
1987.08.06 |
申请人 |
MATSUMOTO, GORO;HITACHI MEDICAL CORPORATION |
发明人 |
MATSUMOTO, GORO;SHIMIZU, KOICHI |
分类号 |
G01B11/24;G01B11/25;G01C3/12;(IPC1-7):G01B11/24 |
主分类号 |
G01B11/24 |
代理机构 |
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代理人 |
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主权项 |
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地址 |
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