Detail publikace

Vortex topographic microscopy for full-field reference-free imaging and testing

BOUCHAL, P. ŠTRBKOVÁ, L. DOSTÁL, Z. BOUCHAL, Z.

Originální název

Vortex topographic microscopy for full-field reference-free imaging and testing

Typ

článek v časopise ve Web of Science, Jimp

Jazyk

angličtina

Originální abstrakt

Light vortices carry orbital angular momentum and have a variety of applications in optical manipulation, high-capacity communications or microscopy. Here we propose a new concept of full-field vortex topographic microscopy enabling a reference-free displacement and shape measurement of reflective samples. The sample surface is mapped by an array of light spots enabling quantitative reconstruction of the local depths from defocused wavefronts. Light from the spots is converted to a lattice of mutually uncorrelated double-helix point spread functions (PSFs) whose angular rotation enables depth estimation. The PSFs are created by self-interference of optical vortices that originate from the same wavefront and are shaped by a spiral phase mask (SPM). The method benefits from the isoplanatic PSFs whose shape and size remain unchanged under defocusing, ensuring high precision in a wide range of measured depths. The technique was tested using a microscope Nikon Eclipse E600 working with a micro-hole plate providing structured illumination and the SPM placed in the imaging path. The depth measurement was demonstrated in the range of 11 μm exceeding the depth of field of the microscope objective up to 25 times. Throughout this range, the surface depth was mapped with the precision better than 30 nm at the lateral positions given with the precision better than 10 nm. Application potential of the method was demonstrated by profiling the top surface of a bearing ball and reconstructing the three-dimensional relief of a reflection phase grating.

Klíčová slova

Three-dimensional microscopy; Spatial filtering; Optical vortices; Talbot and self-imaging effects

Autoři

BOUCHAL, P.; ŠTRBKOVÁ, L.; DOSTÁL, Z.; BOUCHAL, Z.

Vydáno

24. 8. 2017

Nakladatel

The Optical Society (OSA)

Místo

MASSACHUSETTS AVE NW, WASHINGTON, DC 20036 USA

ISSN

1094-4087

Periodikum

OPTICS EXPRESS

Ročník

25

Číslo

18

Stát

Spojené státy americké

Strany od

21428

Strany do

21443

Strany počet

16

URL

https://www.osapublishing.org/oe/abstract.cfm?URI=oe-25-18-21428

BibTex

@article{BUT138403,
  author="Petr {Bouchal} and Lenka {Štrbková} and Zbyněk {Dostál} and Zdeněk {Bouchal}",
  title="Vortex topographic microscopy for full-field reference-free imaging and testing",
  journal="OPTICS EXPRESS",
  year="2017",
  volume="25",
  number="18",
  pages="21428--21443",
  doi="10.1364/OE.25.021428",
  issn="1094-4087",
  url="https://www.osapublishing.org/oe/abstract.cfm?URI=oe-25-18-21428"
}