A part of the schematic in Fig. 1 was incorrect. The correct version is presented herein.
© 2008 Optical Society of America
A part of Fig. 1 in  was incorrect; it is corrected below. The scanning mirror in Fig. 1 of  is replaced with a double-sided mirror whose normal direction is also scanned two-dimensionally. The propagation direction of the plane wave which illuminates the object is scanned by the obverse side of the double-sided scanning mirror. The 0-order light transmitted through the object is reflected by the reverse side of the scanning mirror, resulting in the identical direction of the 0-order light irrespective of the scanning mirror angle.