Influence of Laser Beam Profile on Light Scattering by Human Skin During Photometry by Ellipsoidal Reflectors

Bezuglyi, M. A.; Bezuglaya, N. V.; Kostuk, S.

doi:10.21122/2220-9506-2018-9-1-56-65

Cited by 10 publications

(17 citation statements)

References 13 publications

(9 reference statements)

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“…For the development of structural and fundamental scheme of the measurement unit by Raman spectroscopy (Fig.1) the typology of measuring devices with ellipsoidal reflectors [16] was considered, which was previously tested in numerous experimental researches [15]- [18]. The practical measurements are supported by directing of the laser source radiation of necessary power and diameter.…”

Section: General Principles Of Raman Spectroscopy By Ellipsoidal mentioning

confidence: 99%

“…The interaction of optical radiation on the atomic and molecular level leads to photo-excitation of molecules in specific components and is represented as the backscattered Raman signal. In most cases the ellipsoidal reflector is installed closely to the surface of the investigated object by the area, which contains its first focus [16], [18]. Due to that fact, and correct selection of reflector parameters and incident radiation diameter, capturing of almost all radiation leaving the biological object due to back scattering is performed.…”

Section: General Principles Of Raman Spectroscopy By Ellipsoidal mentioning

confidence: 99%

“…The relative difference between signal levels with and without ER use is insignificant. The authors assume that such insignificant tendency for weakly scattering biological media, which are represented by glucose solutions, will have more important quantitative expression in case of the experiment is conducted on the real object, which contains multiple layers with different optical properties and is considered as optically turbid media [16], [18]. Practical linearity of the obtained results can be explained by conducted measurements on standard solutions, which are devoid of dynamic influence of scattering spectrums of living biologic object and possible fluctuations, which are caused by oxygenation level and blood saturation inside the investigated area.…”

Section: -5mentioning

confidence: 99%

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Raman Spectroscopy Principles for in vivo Diagnostic by Ellipsoidal Reflectors

Bezuglyi

Bezuglaya

2019

Electrical, Control and Communication Engineering

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The paper presents the analysis of the functional abilities of measurement tools with ellipsoidal reflectors for Raman spectroscopy. The investigated structural scheme of the setup is intended for use in Raman spectroscopy in vivo by ellipsoidal reflectors. The setup can be used as a prototype for development of a device for non-invasive control of sugar level. Additionally, the investigation demonstrates the efficiency of ellipsoidal photometry method for registration of Raman scattering signal on test-solutions. The testing was performed for different sugar concentrations with the laser radiation wavelength 980 nm. In addition, the selecting principles of laser radiation source parameters (including beam diameter and power) were investigated. During the research, the data about spatial distribution of the backscattered light in human shoulder and finger tissues during photometry by ellipsoidal reflectors were received. The procedure involves application of Monte Carlo simulation. The dependency of the external and middle ring illuminance of photometric images on the diameter and power of the laser beam is represented based on the zone analysis.

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Section: General Principles Of Raman Spectroscopy By Ellipsoidal mentioning

confidence: 99%

Section: General Principles Of Raman Spectroscopy By Ellipsoidal mentioning

confidence: 99%

Section: -5mentioning

confidence: 99%

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Raman Spectroscopy Principles for in vivo Diagnostic by Ellipsoidal Reflectors

Bezuglyi

Bezuglaya

2019

Electrical, Control and Communication Engineering

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“…The using of ellipsoidal reflectors as a solution for increasing of specific weight of registered light during gathering of scattered light in the range of body angle 2π is successful. It proved its efficiency after interaction with rough surface of technical specimens [21], and optically turbid biological environments [22][23][24][25].…”

Section: Introductionmentioning

confidence: 96%

Optical Feedback Based on the Photometryby Ellipsoidal Reflector in Bionic Fingers Application

Vonsevych¹,

Bezuglyi²,

Prytula³

2019

KPI SN

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Background. The investigation focus is the specificity of effective recognition of surface types during the interaction between finger prosthesis and manipulation objects, and organization of optical feedback system in the control module of bionic limb. Objective. The purpose of the paper is development and testing of method of optical feedback organization in the systems of bionic prostheses of human hand fingers. Methods. The developed system of optical feedback is based on the microcontroller measuring device with infrared (IR) optical emitter and sensor, ellipsoidal reflector, and artificial neural network. Results. During the research the comparison of application effectivity of optical feedback system with ellipsoidal reflector and without one was performed. The analysis was performed by classification of set with twelve, eleven, and ten types of surfaces of investigated specimens with the means of artificial neural network. The obtained accuracy of surface recognition for the system without an ellipsoidal reflector was 77%, 82% and 87%. In turn, the accuracy of surface recognition in the application of the ellipsoidal reflector was 94%, 98%, and 100%, correspondingly. Such results prove the possibility of further use of the photometry system by ellipsoidal reflectors for organization of constructive parts or complete feedback modules of the bionic fingers. Conclusions. The organization system of optical feedback based on optical emitter and sensor, ellipsoidal reflectors and artificial neural network for recognition of kinds of separate surfaces, with which can interact bionic prostheses fingers is proposed. The proposed system proved the certainty in recognition of limited set of investigated specimens. The efficiency of such system can be improved by using sensors array and wider data set for training.

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“…• the necessity of consideration of energetic parameters of probing radiation. Such parameters significantly influences the light scattering by thin layers of BT with strong scattering properties [17], [18].…”

Section: Introductionmentioning

confidence: 99%

Control of Optical Clearing of Human Skin by Ellipsoidal Reflector Method

Bezuglyi

Bezuglaya

Nahornyi

2019

Mìkrosist. elektron. akust.

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Current research deals with the problem of optical clearing during photometry by ellipsoidal reflectors. The specific problem is optical clearing of human skin, specifically the level control tasks during non-invasive conditions of experiment. In silico experiment involve Monte Carlo simulation of light propagation in multi-layered biological tissue and ellipsoidal reflector. The research was made for the set of human skin layers optical properties and their anatomic thicknesses. There were received photometric images in back scattered light for human skin from following parts of body: palm (hand), chest, abdomen, shoulder, back and thigh. Based on the zone analysis there were received illuminance dependencies of middle and external rings of photometric images from the optical clearing time. In addition, there was investigated the influence of optical clearing time on the character of light scattering on human skin from different parts of human body. Ref. 45, fig. 5, tabl. 2.

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Influence of Laser Beam Profile on Light Scattering by Human Skin During Photometry by Ellipsoidal Reflectors

Cited by 10 publications

References 13 publications

Raman Spectroscopy Principles for in vivo Diagnostic by Ellipsoidal Reflectors

Raman Spectroscopy Principles for in vivo Diagnostic by Ellipsoidal Reflectors

Optical Feedback Based on the Photometryby Ellipsoidal Reflector in Bionic Fingers Application

Control of Optical Clearing of Human Skin by Ellipsoidal Reflector Method

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