Photometric model of radiation (solar, light) concentration in optical media

A water lens was used to concentrate sunlight on the surface of a thermoelectric (TE) module in order to heat it. The shape of this water lens could be flexibly adjusted to compensate for solar altitude changes. The light condensed by the water lens produced a large energy distribution on the top of the module. In this study, we simulated the power generation properties when the top of the module was heated by light with a certain condensing distribution. The simulation results revealed that the energy distribution had little effect on the TE generation if the solar light was effectively condensed on a plate with a condensing width of a few millimeters.

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Ideal shape of Fresnel lens for visible solar light concentration

Optics Express ◽

10.1364/oe.386599 ◽

2020 ◽

Vol 28 (12) ◽

pp. 18141

Author(s):

Xinglong Ma ◽

Rihui Jin ◽

Shen Liang ◽

Hongfei Zheng

Keyword(s):

Fresnel Lens ◽

Solar Light ◽

Light Concentration

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Dual-sensitized upconversion-assisted, triple-band absorbing luminescent solar concentrators

Nanoscale ◽

10.1039/d0nr01008a ◽

2020 ◽

Vol 12 (33) ◽

pp. 17265-17271

Author(s):

Seong Kyung Nam ◽

Kiwon Kim ◽

Ji-Hwan Kang ◽

Jun Hyuk Moon

Keyword(s):

Solar Light ◽

Photovoltaic Systems ◽

Solar Concentrator ◽

Solar Concentrators ◽

Luminescent Solar Concentrators ◽

Luminescent Solar Concentrator ◽

Triple Band

Luminescent solar concentrator-photovoltaic systems (LSC-PV) harvest solar light by using transparent photoluminescent plates, which is expected to be particularly useful for building-integrated PV applications.

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Modelling Light Transmission in a Fiber-Optical Reflection System

Nonlinear Analysis Modelling and Control ◽

10.15388/na.2004.9.1.15170 ◽

2004 ◽

Vol 9 (1) ◽

pp. 55-63

Author(s):

V. Kleiza

Keyword(s):

Optical Sensors ◽

Light Transmission ◽

External Cavity ◽

Linear Displacement ◽

Fiber System ◽

Light Emitting ◽

Optical Media ◽

Reflected Light ◽

Fiber Optical ◽

Fiber Optical Sensors

Light transmission in the reflection fiber system, located in external optical media, has been investigated for application as sensors. The system was simulated by different models, including external cavity parameters such as the distance between light emitting and receiving fibers and mirror positioning distance. The sensitivity to a linear displacement of the sensors was studied as a function of the distance between the tips of the light emitting fiber and the center of the pair reflected light collecting fibers, by positioning a mirror. Physical fundamentals and operating principles of the advanced fiber optical sensors were revealed.

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Cataract. Diagnostic errors at referring patients to surgery

10.25276/978-5-94289-028-5 ◽

2020 ◽

Author(s):

V.V. Egorov ◽

◽

E.L. Sorokin ◽

G.P. Smoliakova ◽

O. V. Kolenko ◽

...

Keyword(s):

Clinical Diagnosis ◽

Diagnostic Errors ◽

Ophthalmological Examination ◽

Slit Lamp ◽

Critical View ◽

Optical Media

The textbook examines the most common diagnostic errors of ophthalmologists when making a clinical diagnosis of "cataract". Clinical examples point to a more critical view of the cataract diagnosis. Due to the fact that most of the errors are based on a superficial examination of the eye, clear recommendations are given for conducting a clinical ophthalmological examination of cataracts. At the same time, special attention is paid to the types of examination of the lens with the help of a slit lamp, to the peculiarities of performing various types of ophthalmoscopy with moderate opacity of optical media.

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Photocatalytic Discolouration of Solutions of Reactive Dyes in the Presence of H2O2

Water Quality Research Journal ◽

10.2166/wqrj.1995.009 ◽

1995 ◽

Vol 30 (1) ◽

pp. 53-60 ◽

Cited By ~ 1

Author(s):

Deng Nansheng ◽

Tian Shizhong ◽

Xia Mei

Keyword(s):

Photochemical Reaction ◽

Uv Light ◽

Reactive Dyes ◽

Solar Light ◽

Rate Equations ◽

Oh Radical ◽

Test Results ◽

Dye Molecules ◽

First Order ◽

Dye Solutions

Abstract Tests for the photocatalytic degradation of solutions of three reactive dyes, Red M-5B, Procion Blue MX-R and Procion Black H-N, in the presence of H2O2 were carried out. When the solutions of the three reactive dyes were irradiated by UV or solar light, the colour of the solutions disappeared gradually. A statistical analysis of the test results indicated a linear relation between the concentration of dyes and the time of irradiation. The discolouration reaction of the solutions was of the first order. Rate equations for the discolouration reactions of dye solutions were developed. The dark reactions or the dye solutions containing H2O2 were very slow, illustrating that the photochemical reaction played a very important role. It was demonstrated that UV light and solar light (300 to 380 nm) photolyzes the HO and that the resulting OH radical reacts with the dye molecules and destroys the chromophore.

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