Figure 3
(a) Scheme of the focusing order distribution of a single MLL. S is the plane where zeroth- and first-order separate, b is the working distance of the set-up, c the maximum size of the pinhole at the given position and f is the focal length of the lens. (b) Measured intensity with the PIN-diode moving the pinhole through the different orders. The graph represents a set-up where the distance of zeroth- and first-focusing-order is of the order of the size of the pinhole. |