942018.fig.0020a
(a)
942018.fig.0020b
(b)
942018.fig.0020c
(c)
942018.fig.0020d
(d)
Figure 20: The PDMS optical film of no. D20-B microlens array (a) the first scale (34 μm), (b) the second scale (23 μm), (c) the third scale (13 μm), and (d) the forth scale (6 μm).