| 摘要 |
An apparatus for determining relative positioning of first and second objects being relatively movable may include a laser source carried by the first object for generating a source laser beam toward the second object, and a target optical element carried by the second object for generating a first reflected beam and a second diverging reflected beam from the source laser beam. Furthermore, a detector may be carried by the first object for detecting the first reflected beam and the second diverging reflected beam. A controller may also be connected to the detector for determining a range between the detector and target optical element based upon a size of the second diverging reflected beam. The controller may also determine at least one other positional degree of freedom quantity (e.g., lateral/vertical displacement, pitch angle, yaw angle, and/or roll angle) based upon the first reflected beam and the second diverging reflected beam.
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