Optical Properties of Reflected Light from Leaves

2020 ◽  
pp. 383-392
Author(s):  
Zhongqiu Sun
Keyword(s):  
Optical Properties ◽  
Reflected Light

Optical Properties of Reflected Light From Leaves: A Case Study From One Species

2019 ◽  
Vol 57 (7) ◽  
pp. 4388-4406 ◽  
Author(s):  
Zhongqiu Sun ◽  
Di Wu ◽  
Yunfeng Lv ◽  
Shan Lu
Keyword(s):  
Optical Properties ◽  
Reflected Light

Thermal and photo optical properties of azoxybenzene/alkyloxy-azobenzene–cholesterol dimesogens with alkyl diacetylene linker

2005 ◽  
Vol 20 (12) ◽  
pp. 3431-3438 ◽  
Author(s):  
Subramanian Kumaresan ◽  
V. Ajay Mallia ◽  
Yoshishige Kida ◽  
Nobuyuki Tamaoki
Keyword(s):  
Optical Properties ◽  
Liquid Crystalline ◽  
Visible Region ◽  
Blue Shift ◽  
Isotropic Phase ◽  
Benzene Derivatives ◽  
Smectic A ◽  
Smectic Phases ◽  
Reflected Light ◽  
Liquid Crystalline Material

Thermal and photo-optical properties of azoxybenzene/alkyloxy-azobenzene containing chiral dimesogens are presented. Alkyloxyazobenzene containing dimesogenic materials exhibited two kinds of smectic A phases. Photoirradiation at temperatures exhibiting smectic phases of pure materials in azobenzene linked dimesogens resulted in formation of the isotropic phase, and this was systematically studied at different liquid crystalline temperatures. The efficacy of these compounds as a dopant in the glassy liquid crystalline material was also explored. Increasing concentration to 4 wt%/5 wt% in azobenzene/azoxy-benzene derivatives caused a dramatic red-shift in the wavelength of reflected light by the host cholesteric glassy liquid crystal. Photo-isomerization of these dopants led to a blue-shift of the reflected light, and this effect could be used to tune the light reflectivity of these mixtures over the visible region.

scholarly journals Biomedical optical properties of color light and near-infrared fluorescence separated-merged imager

2019 ◽  
Vol 12 (06) ◽  
pp. 1940001
Author(s):  
Rui Zhang ◽  
Ya-Zhou Xue ◽  
Xiao-Feng Yang
Keyword(s):  
Optical Properties ◽  
Near Infrared ◽  
Perioperative Period ◽  
Infrared Light ◽  
Agarose Gel ◽  
Near Infrared Fluorescence ◽  
Imaging Characteristics ◽  
Reflected Light ◽  
Wide Range

Objective: We study the biomedical optical properties of the color light and near-infrared fluorescence separated-merged imager. Materials and Methods: The color light and near-infrared fluorescence separated-merged imager can illuminate the visible light and the near-infrared light of [Formula: see text][Formula: see text]nm, receiving the reflected light and [Formula: see text][Formula: see text]nm near-infrared fluorescence, and display the color, fluorescence and merge image. ICG solution of different concentration, including standing time, was allocated to study the best imaging condition in vitro, and the depth of fluorescence penetration was studied with 5% agarose gel; the imaging characteristics of the imager was studied using SD rat; and then the SLNs tracing in 4 cases of penile carcinoma was performed. Results: When the concentration of ICG is 13.11[Formula: see text][Formula: see text]mol/L, the fluorescence intensity and the merge image are the best. The maximum depth of fluorescence imaging is 9[Formula: see text]mm in 5% agarose gel, while the bone has the greatest influence on it. The SLNs tracing shows that the imager can locate the SLNs in vitro, to achieve perioperative navigation during biopsy. Conclusion: There are many factors that affect the imaging effect, but the imaging effect of the imager meets the requirement of vision in a wide range, and can effectively trace the SLNs in perioperative period.

scholarly journals Exploring optical properties of solar cells by programming and modeling

2020 ◽  
Vol 5 (1) ◽  
pp. 032-038
Author(s):  
Jasurbek Gulomov ◽  
Rayimjon Aliev ◽  
Murodjon Abduvoxidov ◽  
Avazbek Mirzaalimov ◽  
Navruzbek Mirzaalimov
Keyword(s):  
Refractive Index ◽  
Optical Properties ◽  
Solar Cells ◽  
Solar Cell ◽  
Incident Light ◽  
C Programming Language ◽  
Reflective Layer ◽  
Reflected Light ◽  
C Programming ◽  
Main Factors

One of the main factors influencing the efficiency of solar cells is their optical properties. So, most light is reflecting back and transmit through solar cell. This leads to a decrease in the efficiency. We know that the refractive index of silicon is 3-4 depending on the wavelength of light, and the refractive index of air is about 1. This causes to reflect 34 percentages of the incident light. To reduce the amount of reflected light, the surface of the solar cell should be covered with an anti-reflection layer. It is important to determine the conditions of the types and thicknesses of the material covering the surface of the solar cell. Semiconductor devices modeling has become very popular. Because the results obtained through modeling are very close to the experimental results. In this study, we also modeled the solar cell with and without an anti-reflective layer using the Sentaurus TCAD software package and presented the results obtained. A new program was developed using the C # programming language, and a library was developed to help new researchers study the optical properties of solar cells directly for that program, and a number of results were obtained.

scholarly journals Pyrocarbon optical properties in reflected light

Carbon ◽  
2006 ◽  
Vol 44 (8) ◽  
pp. 1565-1571 ◽  
Author(s):  
Jean-Marie Vallerot ◽  
Xavier Bourrat
Keyword(s):  
Optical Properties ◽  
Reflected Light

The optical properties of thin oxide films on tantalum

1955 ◽  
Vol 227 (1171) ◽  
pp. 434-447 ◽  
Keyword(s):  
Refractive Index ◽  
Optical Properties ◽  
Phase Change ◽  
Wave Length ◽  
Oxide Films ◽  
Metallic Surface ◽  
Reflected Light ◽  
Thin Oxide Films ◽  
Thin Oxide

The iridescent colours produced at the surface of anodically oxidized tantalum have been studied spectrophotometricaily. These colours result from interference, the intensity of the reflected light varying between certain maximum and minimum values according to the wave-length. From measurements of the wave-lengths at which the minima occur, from 2600 to 8500Å, the refractive index and its variation with wave-length are deduced. Values are 2·84 at 3000Å and 2·42 at 8000Å. The phase change at the metallic surface was also deduced, values being 0·2 π radian at 2700Å and 0·8 π radian at 8000Å. The thickness of the anodically-formed films has been found to be 16·0Å/V.

The Iridophores of the Echinoid Diadema antillarum

1961 ◽  
Vol s3-102 (58) ◽  
pp. 181-194
Author(s):  
NORMAN MILLOTT ◽  
BRENDA M. MANLY
Keyword(s):  
Optical Properties ◽  
Rayleigh Scattering ◽  
Diadema Antillarum ◽  
Reflected Light

The blue pattern seen when the skin of Diadema antillarum is viewed by reflected light is due to iridophores. The quality of their blueness varies with the background provided by neighbouring chromatophores. Microdissection reveals that they consist of gelatinous plates contained in a fibrous and cellular capsule. The study of fixed preparations shows that the plates are sheathed and that their structure is greatly altered by fixation which distorts, disrupts, or dissolves them. The structure of the iridophores bears little resemblance to the description of the so-called ‘eyes’ of D. setosum given by Sarasin and Sarasin, with which they appear to correspond. Examination of their optical properties indicates that Rayleigh scattering by the colloidal contents is the most likely cause of their colour.

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