Unconventional magnification behaviour in microsphere-assisted microscopy

Webpage : https://doi.org/10.1016/j.optlastec.2019.01.030

Microsphere-assisted microscopy is an original sub-diffraction-limit imaging technique allowing to reach a few hundred nanometres of lateral resolution in air by only placing a microbead in a classical optical microscope. This work aims to highlight the magnification process in microsphere-assisted microscopy which behaves differently than in optical microscopy. As a matter of fact, the lateral magnification of an optical microscope does not change according to focus plane positions. Experiments on the super-resolution imaging technique, performed in air through soda-lime-glass microspheres and attested by simulations, demonstrate a significant increase in the magnification factor along the microsphere imaging depth, i.e. at different object-focal-plane position of the objective. Moreover, it is shown that the magnification range, as well as its slope, depend on the size of the microsphere. In addition, the influence of the spectral width of the illumination light source on the magnification range is highlighted.

S. Perrin , H. Li , S. Lecler , P. Montgomery

Optics and Laser Technology , Volume 114 , page 40-43 - 2019

@Article{2-PLLM19,
 author = {Perrin, S. and Li, H. and Lecler, S. and Montgomery, P.},
 title = {Unconventional magnification behaviour in microsphere-assisted microscopy},
 journal = {Optics and Laser Technology},
 volume = {114},
 pages = {40-43},
 month = {Jan},
 year = {2019},
 doi = {10.1016/j.optlastec.2019.01.030},
 x-international-audience = {Yes},
 x-language = {EN},
 url = {http://publis.icube.unistra.fr/2-PLLM19}
}