Subdiffraction-limited radius measurements of microcylinders using conventional bright-field optical microscopy.
Opt Lett
; 39(17): 5196-9, 2014 Sep 01.
Article
en En
| MEDLINE
| ID: mdl-25166108
ABSTRACT
A technique for measuring the radius of dielectric microcylinders with subdiffraction-limited precision is presented. Diffraction fringes arising from the dielectric cylinder are measured using conventional bright-field optical microscopy and compared with theory to deduce the radii. The technique has been demonstrated measuring the radii of the major-ampullate silks from Plebs eburnus spiders. Precision better than 50 nm is demonstrated, using a standard optical microscope with a numerical aperture of 0.6 for the objective. Accuracy was verified using scanning electron microscopy. This technique will facilitate rapid, precise measurement of dielectric microcylinder radii, enabling a new optical-microscopy-based measurement approach for these challenging micro-optics.
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01-internacional
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MEDLINE
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En
Revista:
Opt Lett
Año:
2014
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Article