Figure 8
Measured (plotted symbols) and predicted (lines) speckle contrast versus wavevector transfer. Open circles and the solid line are results for a 1.2 mm-thick aerogel illuminated by a 7 µm × 21 µm (H × V) beam, open squares and the dot-dashed line are results for a 1.2 mm-thick aerogel illuminated by a 15 µm × 31 µm beam, and open triangles and the dashed line are results for a 2.7 mm-thick aerogel illuminated by a 6 µm × 21 µm beam. |