Large-field-of-view optical elastography using digital image correlation for biological soft tissue investigation (erratum)

Claus, Daniel; Mlikota, Marijo; Geibel, Jonathan; Reichenbach, Thomas; Pedrini, Giancarlo; Mischinger, Johannes; Schmauder, Siegfried

doi:10.1117/1.jmi.4.2.029801

Cited by 2 publications

(1 citation statement)

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“…correlation method [36,37] applied to 2D CCD images of the reflected focussed spot at different axial positions, with these being close to the true focus. The core of the algorithm is to take two closely separated (∆z = 5 nm) images and take the cross-correlation between the subsets of corresponding numerical arrays.…”

Section: Discussionmentioning

confidence: 99%

A highly sensitive laser focus positioning method with sub-micrometre accuracy using coherent Fourier scatterometry

Kolenov

Meng

Pereira

2020

Meas. Sci. Technol.

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We report a novel method of focus determination with high sensitivity and submicrometre accuracy. The technique relies on the asymmetry in the scattered far field from a nanosphere located at the surface of interest. The out-of-focus displacement of the probing beam manifests itself in imbalance of the signal of the differential detector located at the far field. Up–down scanning of the focussed field renders an error S-curve with a linear region that is slightly bigger than the corresponding vectorial Rayleigh range. We experimentally show that the focus can be determined not only for a surface with high optical contrast, such as a silicon wafer, but also for a weakly reflecting surface, such as fused silica glass. Further, for the probing wavelength of 405 nm, three sizes of polystyrene latex spheres, namely 200, 100, and 50 nm in diameter, are tested. Higher sensitivity was obtained as the sphere diameter became smaller. However, due to the fact that the scattering cross-section decreases as the sixth power of the nanosphere diameter, we envision that further size reduction of the studied sphere would not contribute to a drastic improvement in sensitivity. We believe that the proposed method can find applications in bio/nano detection, micromachining, and optical disk applications.

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Section: Discussionmentioning

confidence: 99%

A highly sensitive laser focus positioning method with sub-micrometre accuracy using coherent Fourier scatterometry

Kolenov

Meng

Pereira

2020

Meas. Sci. Technol.

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Soft tissue elastography via shearing interferometry

et al. 2018

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Early detection of cancer can significantly increase the survival chances of patients. Palpation is a traditional method in order to detect cancer; however, in minimally invasive surgery the surgeon is deprived of the sense of touch. We demonstrate how shearing elastography can recover elastic parameters and furthermore can be used to localize stiffness imhomogenities even if hidden underneath the surface. Furthermore, the influence of size and depth of the stiffness imhomogenities on the detection accuracy and localization is investigated.

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Large-field-of-view optical elastography using digital image correlation for biological soft tissue investigation (erratum)

Abstract: , "Large-field-of-view optical elastography using digital image correlation for biological soft tissue investigation (erratum)," J.

Cited by 2 publications

References 38 publications

A highly sensitive laser focus positioning method with sub-micrometre accuracy using coherent Fourier scatterometry

A highly sensitive laser focus positioning method with sub-micrometre accuracy using coherent Fourier scatterometry

Soft tissue elastography via shearing interferometry

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