(color online) Image reconstruction by multiple wavelength illumination. (a) Image of V-shaped structure (2° opening, long) formed by 0.9 NA objective under conventional illumination. (b)–(e) Images of V-shaped structure under nanowire illumination formed by various standard objectives of NAs ranging from 0.6 to 0.9. (f) Image under evanescent wave illumination from nanowires of three different fluorescent wavelengths and reconstructed image. Scale bar size: . Reproduced with permission from Ref. [50].