Figure 7From: Nanopillar array with a λ/11 diameter fabricated by a kind of visible CW laser direct lithography systemNumerical simulation of astigmatism influence on the donut-shaped focal spot. Simulated light intensity distribution vs astigmatism coefficient. (a) A a = 0.05, (b) A a = 0.1, (c) A a = 0.2, and (d) A a = 0.3. Intensity along x = y and x = −y (e) A a = 0.05, (f) A a = 0.1, (g) A a = 0.2, and (h) A a = 0.3.Back to article page