Figure 2
SEM photographs of an FZP as an objective lens with a diameter of 0.5 mm and outer-zone width of 0.1 µm [(a) inner-zone patterns and (b) outermost-zone patterns], and those of an FZP as a condenser lens with a diameter of 1 mm and outer-zone width of 0.2 µm [(c) inner-zone patterns and (d) outermost-zone patterns]. |