| 摘要 |
A method of projecting into space, from a first object, a plurality of modulated lines to form a grid defining a first relative reference frame, the method includes projecting polarized light having a first orientation to form a horizontal grid line projecting from the first object and projecting polarized light having a second orientation different than the first orientation to from a vertical grid line projecting from the first object and modulating the horizontal grid line and the vertical grid line to carry first and second grid words, respectively. |
