Spiral phase contrast imaging in microscopy

Fürhapter, Severin; Jesacher, Alexander; Bernet, Stefan; Ritsch‐Marte, Monika

doi:10.1364/opex.13.000689

Cited by 538 publications

(295 citation statements)

References 9 publications

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“…We propose here a filter that is based on a spiral phase. A spiral phase filter with an azimuthal period of 2;r is a good edge enhancer as has been demonstrated in recent publications [9,10]. We show here that a spiral phase filter with azimuthal period n behaves as a comer enhancer The comer detection property of this filter can be more clearly understood by analyzing the symmetry of its impulse response.…”

Section: Corner Detectionsupporting

confidence: 73%

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Correlation based rotation-invariant corner detector

Mazzaferri¹,

Ledesma²,

Wetter³

et al. 2008

AIP Conference Proceedings

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Abstract. In this work we introduce a new approach for corner extraction. The method that allows the corner extraction with rotation invariance is composed by a spiral phase function and a binary amplitude. The designed function can be easily implemented as a filter for a Vander Lugt-like optical correlator A final image obtained with the detector presents intensity peaks in each corner location. Numerical simulation has been performed on a set of synthetic scenes, modulated either in amplitude or phase. Results that show the very good performance of the method are shown.

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Section: Corner Detectionsupporting

confidence: 73%

“…Two recent works have addressed rotation invariance in optical edge detection employing a spiral phase filter [9,10]. In the present work, we propose a new optical comer detection method based on a spiral phase filter…”

Section: Introductionmentioning

confidence: 99%

Correlation based rotation-invariant corner detector

Mazzaferri¹,

Ledesma²,

Wetter³

et al. 2008

AIP Conference Proceedings

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“…These OVs are localizations in space were the amplitude of the wave is zero and its phase is undefined [1][2][3], while in the surroundings the phase takes a helicoidal form, usually represented with the term exp(imθ), where θ is the azimuthal angle and m is the topological charge representing the number of 2π discontinuities of the wavefront [4]. Due to these features, OVs have been widely used in metrological applications [5,6], phase shifting interferometry [7], stellar choronography [8], among others. To generate the OVs, computer generated holograms (CGHs) [9], spiral phase plates (SPPs) [10] and vortex-producing lenses (VPL) [11] are commonly used.…”

Section: Introductionmentioning

confidence: 99%

Experimental micrometer-displacement measurements based on optical vortices

Londoño¹,

Rueda²,

Gómez³

et al. 2017

Opt. Pura Apl.

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ABSTRACT:In this work, a system for measuring micrometer-displacements based on the characteristics of optical vortices is presented. In the proposal, a binary vortex-producing lens (BVPL) programmed to generate optimized optical vortices is transversally displaced from the optical axis, inducing perturbations on the optical characteristics of the vortices that are used as transduction parameters. Specifically, the method proposed theoretically by Anzolin et al. [18], which is based on the asymmetry of the intensity patterns of the off-axis optical vortices, is studied experimentally by using BVPLs. Experimental implementation is completely described and compared with theoretical results, likewise, metrological characteristics of the experimental metrological system are analyzed. Based on the results, we experimentally confirm the possibility of creating high sensitivity metrological systems by using optical vortices, opening the door for new vortex metrology techniques.Key words: Optical Vortices, Metrology, Micro-displacement. RESUMEN:En este trabajo, un sistema para medir desplazamientos micrométricos basados en las características de vórtices ópticos es presentado. En la propuesta, una lente productora de vórtices binaria (BVPL) programada para generar vórtices ópticos optimizados es desplazada transversalmente del eje óptico, induciendo perturbaciones en las características ópticas de los vórtices que son usadas como parámetros de transducción. Específicamente, el método propuesto por Anzolín et al [18], el cuál es basado en la asimetría de los patrones de intensidad de los vórtices ópticos fuera del eje, es estudiado experimentalmente usando BVPLs. Se describe completamente la implementación experimental y se compara con los resultados teóricos, así mismo, se analizan características metrológicas del sistema metrológico experimental. En base a los resultados, confirmamos experimentalmente la posibilidad de crear sistemas metrológicos de alta sensibilidad utilizando vórtices ópticos, abriendo la puerta para nuevas técnicas de metrología de vórtices.Palabras clave: Vórtices ópticos, Metrología, micro desplazamientos. REFERENCES AND LINKS / REFERENCIAS Y ENLACES[1] J. F. Nye and M. V. Berry, "Dislocations in wave trains," Proc. R. Soc. London Ser. A 336, 165-190 (1974 429-431 (1990).[10] M. W. Beijersbergen, R. P. C. Coerwinkel, M. Kristensen, and J. P. Woerdman, "Helical-wavefront laser beams produced with a spiral phaseplate," Opt. Commun. 112, 321-327 (1994).https://doi.org/10.1016/0030-4018(94)90638-6[11] E. Rueda, D. Muñetón, J. A. Gómez, and A. Lencina, "High-quality optical vortex-beam generation by using a multilevel vortex-producing lens," Opt. Lett. 38, 3941-3944 (2013

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“…Especially at high -values, a significant increase in illumination flux is achievable with only a modest reduction in contrast. Such a trade-off may be applicable within low-light imaging applications in either classical (17) or quantum domains (18).…”

Section: Discussionmentioning

confidence: 99%

“…We also note that the study of spiral phase filters, as applied to light of finite spatial coherence, is closely related to both spiral phase microscopy (17,18) and optical vortex coronagraphs (19).…”

Section: Introductionmentioning

confidence: 85%

The transition from a coherent optical vortex to a Rankine vortex: beam contrast dependence on topological charge

Toninelli

Aspden

Phillips

et al. 2016

Journal of Modern Optics

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Spatially coherent helically phased light beams carry orbital angular momentum (OAM) and contain phase singularities at their centre. Destructive interference at the position of the phase singularity means the intensity at this point is necessarily zero, which results in a high contrast between the centre and the surrounding annular intensity distribution. Beams of reduced spatial coherence yet still carrying OAM have previously been referred to as Rankine vortices. Such beams no longer possess zero intensity at their centre, exhibiting a contrast that decreases as their spatial coherence is reduced. In this work, we study the contrast of a vortex beam as a function of its spatial coherence and topological charge. We show that beams carrying higher values of topological charge display a radial intensity contrast that is more resilient to a reduction in spatial coherence of the source.

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Spiral phase contrast imaging in microscopy

Cited by 538 publications

References 9 publications

Correlation based rotation-invariant corner detector

Correlation based rotation-invariant corner detector

Experimental micrometer-displacement measurements based on optical vortices

The transition from a coherent optical vortex to a Rankine vortex: beam contrast dependence on topological charge

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