The effects of temporal and longitudinal spatial coherence in a disbalanced-arm interferometer

Ryabukho, Vladimir P.; Lyakin, D. V.; Lobachev, Mikhail I.

doi:10.1134/1.1646718

Cited by 14 publications

(6 citation statements)

References 7 publications

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“…For biomedical optics applications the use of infrared light is preferable as it penetrates deeper in tissue [90], which then requires the development of highresolution infrared cameras. For frequency-domain FF-OCT operation [91], tunable sources and fs sources that can reveal the spectral interference images in a short time will be helpful.Finally, it should be mentioned that spatial coherence effects in other related fields such as interferometry in general, holography, surface profiling and other applications has been an active field of research during the last two decades [92][93][94][95][96][97]. The group at Saratov University has been studying longitudinal spatial coherence extensively [98][99][100][101] …”

Section: Conclusion and Future Trendsmentioning

confidence: 99%

Spatial and temporal coherence effects in interference microscopy and full‐field optical coherence tomography

Abdulhalim

2012

Annalen der Physik

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Low‐coherence optical microscopy or optical coherence microscopy uses light with short coherence length. The well‐known case is: “white‐light interferometry”, which became recently more known as: “optical coherence tomography”. However, when lenses and microscope objectives are used to create interferometric images, in what is known classically as “interference microscopy” or today as “full‐field optical coherence tomography” the spatial coherence starts to play a critical role. In this article the coherence effects in low‐coherence optical microscopy are reviewed. As this technology is becoming increasingly publicized due to its importance in three‐dimensional imaging, particularly of scattering biological media and optical metrology, the understanding of the fundamental physics behind it is essential. The interplay between longitudinal spatial coherence and temporal coherence and the effects associated with them are discussed in detail particularly when high numerical apertures are used. An important conclusion of this study is that a high‐contrast, high‐resolution system for imaging of multilayered samples is the one that uses narrowband illumination and high‐NA objectives with an index‐matching fluid. Such a system, when combined with frequency‐domain operation, can reveal nearly real‐time three‐dimensional images, and is thus competitive with confocal microscopy.

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Section: Conclusion and Future Trendsmentioning

confidence: 99%

Spatial and temporal coherence effects in interference microscopy and full‐field optical coherence tomography

Abdulhalim

2012

Annalen der Physik

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“…The effect of an optically thick film positioned along the light path of one of the interferometer arms was experimentally investigated by Ryabukho et al 9 Their investigation is extended here, and adapted to our setup, so we may rigorously explain the effect of the additional medium in one of the arms on the longitudinal coherence function. Introducing a uniform dielectric medium into one of the interferometer arms shifts the front focal point of lens L 1 forward along this arm relative to the focal point in the other arm.…”

Section: Longitudinal Spatial Coherence In the Presence Of A Partiallmentioning

confidence: 92%

“…As we shall see next, this phenomenon causes the spatial longitudinal coherence function to shift in the direction opposite that of the temporal coherence function, although both functions are shifted because of the same dielectric medium. 9 The two complex amplitudes at the sample and the reference arms, which originated from the same source point, interfere coherently. However, the contributions from all other source points are summed incoherently because of the incoherent nature of the source.…”

Section: Longitudinal Spatial Coherence In the Presence Of A Partiallmentioning

confidence: 99%

Synthesis of a multiple-peak spatial degree of coherence for imaging through absorbing media

Gokhler

Rosen

2005

Appl. Opt.

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The synthesis of a multiple-peak spatial degree of coherence is demonstrated. This degree of coherence enables us to scan different sample points on different altitudes simultaneously and thus decreases the acquisition time. The multipeak degree of coherence is also used for imaging through an absorbing layer with different thicknesses or different indices of refraction along the layer. All our experiments are performed with a quasi-monochromatic light source. Therefore problems of dispersion and inhomogeneous absorption are avoided. Our experimental results are presented.

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“…Spatial coherence profilometry shows an opposite effect. A plate of glass appears to shorten the interferometer arm [8]. The mirror in this arm must be shifted away from the beam splitter to balance the interferometer again.…”

Section: Influence Of Dispersionmentioning

confidence: 99%

Similarities and Differences between Spatial Coherence Profilometry and White-light Interferometry

Pavlíček¹,

Takeda²,

Rastogi³

et al. 2010

AIP Conference Proceedings

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The effects of temporal and longitudinal spatial coherence in a disbalanced-arm interferometer

Cited by 14 publications

References 7 publications

Spatial and temporal coherence effects in interference microscopy and full‐field optical coherence tomography

Spatial and temporal coherence effects in interference microscopy and full‐field optical coherence tomography

Synthesis of a multiple-peak spatial degree of coherence for imaging through absorbing media

Similarities and Differences between Spatial Coherence Profilometry and White-light Interferometry

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