| 摘要 |
Non-contact apparatus for positioning a surface working, testing or inspecti on device (1) relative to a surface to be worked, tested or inspected (2) at a desired position and orientation relative thereto (3b) including a baseplate (4) locatable at a distance away from the surface (2), means (5) for mountin g the surface working, testing or inspection device on the baseplate (4), thre e or more range finder units (6a, 6b, 6c) removably mounted in spaced array (6 d) on the baseplate (4), each of which three or more range finder units (6a, 6b , 6c) includes a source (7) for impinging a beam (8) of ultraviolet, visible light or infrared radiation on the surface (12), a detector (9) for imaging the impinging radiation (12) and for calculating a distance measurement (10a ) from a datum location on the respective source (11a).
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