发明名称 |
HIGHLY ACCURATE THREE-DIMENSIONAL SURFACE DIGITIZING SYSTEM AND METHODS |
摘要 |
A distance-measuring system (10) includes a light source (14) and modulator (18) for transmitting a modulated beam of light to a target, thereby generating a received beam. A calibration unit (40) periodically calibrates the system by positioning a calibration target (42) between the light source and the target so that the transmitted beam is interrupted, thereby generating a received calibration beam. A target sensor (30) receives the reflected target and provides a target signal (32) indicative of the reflected target beam. A reference sensor (36) receives light from the light source (14) and provides a reference signal (38) to processing circuitry (34). The processing circuitry receives the target signal (32) and the reference signal (38), adjusts the frequency of the transmitted beam until a zero phase difference exists between the target signal (32) and the reference signal (38), and calculates the distance to the target based upon frequency which produces a zero phase difference.
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申请公布号 |
WO9913293(A1) |
申请公布日期 |
1999.03.18 |
申请号 |
WO1998US18752 |
申请日期 |
1998.09.09 |
申请人 |
UTOPTICS, INC. |
发明人 |
SEKOWSKI, MAREK;SUMMERS, THOMAS;HARDY, JAMES, M. |
分类号 |
G01B11/00;G01B11/24;G01S7/497;G01S17/32;G01S17/36;(IPC1-7):G01B11/24 |
主分类号 |
G01B11/00 |
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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