Design of flowing refractometer with cylindrical insert in the form a vertical pipeline section for control to clear media state

2021 ◽  
pp. 36-43
Author(s):  
Vadim V. Davydov ◽  
Denis I. Nikolaev ◽  
Angelina V. Moroz
Keyword(s):  
Refractive Index ◽  
Laser Radiation ◽  
Experimental Investigations ◽  
Optical Elements ◽  
Flowing Fluid ◽  
Flowing Liquid ◽  
Unbalance Voltage ◽  
Laminar And Turbulent Flow ◽  
Differential Type ◽  
Media Condition

The article a the new design of flowing refractometer of differential type for media condition control both in laminar and turbulent flow regimes is considered. Given the peculiarities of the location of the flow and closed cuvette and the angles of incidence of laser radiation on their walls we have implemented a new method of measuring the refractive index n in new developed design of refractometer. This allowed us to make the influence of a number of errors related with unbalance voltage on the photoelectric converter, with an increase in the number of reflections between optical elements of laser radiation, with the presence of a transport link for the selection of flowing fluid and temperature fluctuations on the result of measuring the refractive index. The technique allowing to reduce the influence of change of the optical density of the flowing liquid on the measurement error of refractive index is proposed. The results of experimental investigations for different media are presented.

scholarly journals Новый метод измерения показателя преломления текущей жидкости

2021 ◽  
Vol 129 (7) ◽  
pp. 954
Author(s):  
В.В. Давыдов ◽  
А.В. Мороз ◽  
Д.И. Николаев
Keyword(s):  
Refractive Index ◽  
Laser Radiation ◽  
Vertical Section ◽  
Experimental Studies ◽  
New Method ◽  
Practical Implementation ◽  
Multiple Reflections ◽  
Optical Elements ◽  
Flowing Liquid ◽  
Flow Through

The necessity of developing a new method for measuring the refractive index of a liquid in a turbulent mode of its flow in a pipeline is substantiated. A new method for measuring the refractive index of a medium n is presented. For its practical implementation, a new design of a flow-through refractometer has been developed, which makes it possible to measure n in both laminar and turbulent fluid flow. A new design of the optical part of the refractometer is considered. A new way of placing it on the vertical section of the pipeline for measuring n is proposed. All this makes it possible to make insignificant the influence on the measurement result of n flowing liquid of errors associated with multiple reflections of laser radiation from optical elements, with the formation of voids or vortex flows in the pipeline and with temperature fluctuations. In the design of a refractometer with a new method for measuring n, there are no restrictions on determining the value of n of a flowing liquid, in contrast to the used industrial flow-through refractometers, the principle of which is based on the phenomenon of total internal reflection of laser radiation at the interface of two media. The results of experimental studies of various media are presented.

scholarly journals Condition monitoring of current media using a differential refractometer

2021 ◽  
Vol 2086 (1) ◽  
pp. 012135
Author(s):  
V I Svyatkina ◽  
V V Davydov ◽  
V Yu Rud
Keyword(s):  
Refractive Index ◽  
Laser Radiation ◽  
Condition Monitoring ◽  
Optical Density ◽  
New Method ◽  
Experimental Investigations ◽  
Refractive Index Measurement ◽  
Flowing Liquid ◽  
Index Measurement ◽  
Differential Flow

Abstract A new design of a differential flow refractometer has been developed to monitor the condition of flowing media in a pipeline. A new method of refractive index measurement has been implemented, taking into account the specifics of flowing and closed cuvette arrangement, as well as the angles of incidence of laser radiation on their walls. The effect of changes in the optical density in the flowing liquid on the refractive index measurement result is determined. The results of experimental investigations of different media are presented.

Properties of the surface of structural materials in the area of a barcode formed under the action of laser radiation

2021 ◽  
Vol 1 ◽  
pp. 15-24
Author(s):  
Yu.R. Kolobov ◽  
◽  
A.E. Ligachev ◽  
Keyword(s):  
Laser Radiation ◽  
Picosecond Laser ◽  
Laser Pulses ◽  
Structural Materials ◽  
Metal Alloys ◽  
Experimental Investigations ◽  
Structure And Properties ◽  
Surface Layers ◽  
Continuous Laser ◽  
Near Surface

A review of experimental investigations of changes in the structure and properties of the surface and near-surface layers of various materials (steels, metal alloys, ceramics and graphite) in the area of a barcode applied by continuous laser radiation and short (nanosecond) and ultrashort (femto- and picosecond) laser pulses.

Damage of Dusty Optical Elements in the Field of Continuous-Wave Laser Radiation

JETP Letters ◽  
2018 ◽  
Vol 108 (6) ◽  
pp. 379-383 ◽  
Author(s):  
I. N. Derkach ◽  
E. A. Kudryashov ◽  
G. N. Kachalin ◽  
N. A. Kirdyaev ◽  
V. V. Ladeishchikova ◽  
...  
Keyword(s):  
Laser Radiation ◽  
Continuous Wave ◽  
Continuous Wave Laser ◽  
Optical Elements ◽  
Wave Laser

Study of the refractive index change in a-Si:H thin films patterned by 532nm laser radiation for photovoltaic applications

2010 ◽  
Vol 518 (18) ◽  
pp. 5331-5339 ◽  
Author(s):  
M. Colina ◽  
C. Molpeceres ◽  
M. Holgado ◽  
J. Gandia ◽  
O. Nos ◽  
...  
Keyword(s):  
Thin Films ◽  
Refractive Index ◽  
Laser Radiation ◽  
Refractive Index Change ◽  
Index Change ◽  
Photovoltaic Applications

Investigation of Heating of Optical Elements During Formation of High-Power CW Fiber Laser Radiation

2019 ◽  
Vol 61 (12) ◽  
pp. 2305-2312 ◽  
Author(s):  
P. A. Nosov ◽  
A. F. Shirankov ◽  
A. M. Khorokhorov ◽  
K. I. Zaytsev ◽  
S. O. Yurchenko
Keyword(s):  
Laser Radiation ◽  
Fiber Laser ◽  
High Power ◽  
Optical Elements

Electronic and Optical Properties of Indium Selenide Nanosheet Using First-Principle Calculations

2019 ◽  
Vol 11 (11) ◽  
pp. 1148-1154
Author(s):  
Hamza A. Mezerh ◽  
Kadhim J. Kadhim ◽  
Hamad Rahman Jappor
Keyword(s):  
Refractive Index ◽  
Optical Properties ◽  
Density Functional ◽  
Visible Region ◽  
High Refractive Index ◽  
Indium Selenide ◽  
Experimental Investigations ◽  
Ultraviolet Region ◽  
Electronic And Optical Properties ◽  
Index Value

Density functional theory (DFT) have been used to examine the electronic and optical, properties of two-dimensional (2D) indium selenide (InSe) nanosheet. Our calculations indicate that the energy band gap of InSe is indirect and equal to 1.53 eV. It can be seen that for the pristine case, the majority and minority density of state (DOS) are fully symmetric. The optical properties are considered up to 36 eV. Our results established that the absorption starts in the visible region, while the peaks in the ultraviolet region. The refractive index value is 1.84 at zero photon energy limit and increase to 2.31. The high refractive index allows this nanosheet to be utilized as an internal layer coating between the substrate and the ultraviolet absorbing layer. Additionally, we observed that the gained optical properties of InSe nanosheet are in the ultraviolet range and the results are significant. It is expected that from these calculations to provide useful information for further experimental investigations of InSe nanosheet.

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