Polychromatic low-coherence interferometry of stratified structures with digital interferogram recording and processing

Лычагов, В. В.; Ryabukho, Vladimir P.; Kalyanov, Alexander; Смирнов, И. В.

doi:10.1088/2040-8978/14/1/015702

Cited by 15 publications

(8 citation statements)

References 17 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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“…This choice is explained by using this color model in system of image recording by digital matrix photodetectors. In this model color image consists of three monochromatic patterns that are called chrominance channels [5]. Each of the pattern is registered in monochromic light -red, green and blue.…”

Section: Methods Of Measurement Of Rbc Optical Thicknessmentioning

confidence: 99%

Morphological analysis of red blood cells by polychromatic interference microscopy of thin films

Dyachenko

Malinova

Ryabukho

2016

J. Phys.: Conf. Ser.

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Red blood cells (RBC) distribution width (RDW) is a promising hematological parameter with broadapplications in clinical practice; in various studies RDWhas been shown to be associated with increased risk of heart failure (HF) in general population. It predicts mortality and other major adverse events in HF patients. In this report new method of RDWmeasurement is presented. It's based on interference color analysis of red blood cells in blood smear and further measurement of its optical thickness. Descriptive statistics of the of the RBC optical thickness distribution in a blood smear were used for RDW estimation in every studied sample. Proposed method is considered to be avoiding type II errors and minimizing the variability of measured RDW.

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“…Такие представления эффективны и с прикладной точки зрения для количественной оценки декорреляции волновых полей с широкими частотными и угловыми спектрами при их прохождении через границы раздела сред с различными показателями преломления [30,38,39], для определения геометрических и оптических параметров объектов [40,41], для развития методов корреляционной интерференционной микроскопии [10,13,39,42] с целью расширения их измерительных возможностей.…”

Section: заключениеunclassified

“…Конечная длина продольной когерентности освещающего поля накладывает определенные ограничения на возможность наблюдения эффектов интерференции волн в интерференционном эксперименте (в том числе в интерференционной микроскопии [7,9,10,12,13]) и в обычной микроскопии при наблюдении интерференционных изображений тонких слоистых объектов без использования опорного волнового поля [30,31]. Взаимный пространственный сдвиг интерферирующих волновых полей, обусловленный различием оптических путей интерферирующих полей, приводит к возникновению взаимной декогерентности возмущений полей в области их наложения и интерференции, что сопровождается снижением контраста интерференционных осцилляций интенсивности суммарного поля.…”

Section: Introductionunclassified

Мгновенные Спекл-Модулированные Интерференционные Изображения И Когерентные Эффекты В Оптической Микроскопии Тонких Слоев

Максимова¹,

Мысина²,

Дьяченко³

et al. 2020

Журнал Технической Физики

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The formation of instantaneous speckle-modulated interference images of thin transparent layers in an optical microscope under an illuminating quasi-monochromatic or frequency broadband wave field with wide angular spectra and coherent effects are considered. Instantaneous speckle-modulated interference images of the layer in the transverse and longitudinal sections of the total wave field reflected by the layer are obtained by numerical simulation of the spatial distributions of the complex amplitude of the wave fields reflected by the layer faces and their superposition. The results of computer simulation of instantaneous speckle-modulated and experimentally observed averaged interference images of the layer under quasi-monochromatic and frequency broadband illuminating layer field with different width of the angular spectrum are presented. The mutual correlation of instantaneous speckle fields reflected by the layer faces and the effects of the influence of the width of the angular and frequency spectra of the illuminating field on the contrast of experimentally observed interference images of the layer are studied numerically. On the basis of the instantaneous speckle-modulation of the wave field the physical mechanism of the influence of angular width and the width of the frequency spectra of the illuminating field on the mutual coherence of the interfering wave fields is investigated.

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Polychromatic low-coherence interferometry of stratified structures with digital interferogram recording and processing

Cited by 15 publications

References 17 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

Morphological analysis of red blood cells by polychromatic interference microscopy of thin films

Мгновенные Спекл-Модулированные Интерференционные Изображения И Когерентные Эффекты В Оптической Микроскопии Тонких Слоев

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