| 摘要 |
A method (100) of determining a position of a waveguide (3), wherein the method comprises: projecting (110) a beam (7) of light towards the waveguide (3) to cast a shadow (9) such that the shadow (9) is detectable by multiple light sensors (13); receiving (120), from the multiple light sensors (13), a signal indicative of a size and position of the shadow (9); and determining (130) the position of the waveguide (3) in at least two dimensions based on the signal, wherein one dimension is along a path of the beam (7). |
