Journal of lasers, optics & photonics最新文献_第3页

Green technology and engineering sustainability in higher education 高等教育中的绿色技术和工程可持续性

Journal of lasers, optics & photonics Pub Date : 2018-01-01 DOI: 10.4172/2469-410X-C8-043

pIbrahim Abdulhalimp

引用次数: 0

Comprehensive Study on the Electron Temperature and Electron Density of Laser-Induced Mg Plasma 激光诱导Mg等离子体电子温度和电子密度的综合研究

Journal of lasers, optics & photonics Pub Date : 2018-01-01 DOI: 10.4172/2469-410X.1000181

Yao Hongbing, E. Asamoah, C. Jiawei, Y. Dongqing, Y. Fengxiao

引用次数: 4

Features of Laser Tube Bending processing based on Laser Forming: A Review 基于激光成形的激光管弯曲加工特点综述

Journal of lasers, optics & photonics Pub Date : 2018-01-01 DOI: 10.4172/2469-410X.1000174

K. I. Imhan, Baharudin Btht, A. Zakaria, M. Ismail, Naseer Mahdi Hadi Alsabti, A. Ahmad

{"title":"Features of Laser Tube Bending processing based on Laser Forming: A Review","authors":"K. I. Imhan, Baharudin Btht, A. Zakaria, M. Ismail, Naseer Mahdi Hadi Alsabti, A. Ahmad","doi":"10.4172/2469-410X.1000174","DOIUrl":"https://doi.org/10.4172/2469-410X.1000174","url":null,"abstract":"Laser forming of materials can help produce the desired shapes from sheets or tubes, which is not possible through conventional methods. Molds, dies, and external force are not needed for the laser forming of materials. Furthermore, the process is flexible and can be controlled by making changes to the materials, their geometry, and the laser parameters, either individually or in combination with each other. Investigations into laser tube bending are scarce in the literature pertaining to this field of study despite its potential and industrial importance. In contrast, much research has been conducted on laser sheet forming, which employs the same mechanism. In this study, laser tube bending is compared with laser sheet forming in order to develop a better understanding of the laser forming process. This review elucidates upon the mechanisms employed in laser forming (in general) and laser tube bending (in particular). A number of investigation methods are reviewed and analytical models of the process are also described. The principle of laser tube bending is explained, and the influence of various parameters (such as materials, geometry, laser, edge, and cooling effects) on the process is analyzed. Additionally, large tubes bending and preloading, or laser assistance, are examined.","PeriodicalId":92245,"journal":{"name":"Journal of lasers, optics & photonics","volume":"334 1","pages":"1-8"},"PeriodicalIF":0.0,"publicationDate":"2018-01-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"80590258","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 2

Lifetime Studies of Buckminster Fullerene C60 in the Region 370 nm to 421 nm Using THF (Oxolane) THF (Oxolane)对370 ~ 421 nm区域Buckminster富勒烯C60的寿命研究

Journal of lasers, optics & photonics Pub Date : 2018-01-01 DOI: 10.4172/2469-410X.1000188

Subramaniam Tk, R. Premanand, Inbanathan

引用次数: 0

Enhancement of the Resolution of CCD Undersampling with Amplitude Grating and Subpixeling 用幅度光栅和亚像素化提高CCD欠采样分辨率

Journal of lasers, optics & photonics Pub Date : 2018-01-01 DOI: 10.4172/2469-410X.1000185

Sohail M

{"title":"Enhancement of the Resolution of CCD Undersampling with Amplitude Grating and Subpixeling","authors":"Sohail M","doi":"10.4172/2469-410X.1000185","DOIUrl":"https://doi.org/10.4172/2469-410X.1000185","url":null,"abstract":"Charged coupled devices (CCDs) are much common in use in different imaging modalities. In most cases, they mainly limit the resolution of imaging devices. The resolution may be limited by them in two different ways: one by the finite non-zero size of pixels and second by the spacing between the pixels or the pixel pitch. If the pixel spacings do not follow the Nyquist sampling theorem, the information obtained does not represent the true picture of the object. The under-sampling by CCD has been dealt before in literature by placing optical mask at the Fourier plane in a 4f system assuming pixels as point pixels and reusing the same optical mask at the Fourier spectrum of the image captured by the CCD. If the pixels have non-zero width, as they do in reality, the under-sampling cannot be nullified using optical mask alone but a subpixeling in addition to optical mask is also required to remove the aliasing introduced by the nonzero size of the pixels. The three level gray mask at the CCD plane is used that to resolve the CCD pixel into small subpixels while the image and the CCD remain motionless. The intensities were recorded by the CCD at each subpixel step that recovers the information lost due to the averaging nature of the CCD pixels. To our knowledge, we for the first time are combining the optical mask at the Fourier plane in a 4f system and subpixeling of the CCD pixel by using three level gray mask at the CCD plane simultaneously for nullifying the effect of undersampling by the CCD of finite pixel size. Citation: Sohail M (2018) Enhancement of the Resolution of CCD Undersampling with Amplitude Grating and Subpixeling. J Laser Opt Photonics 5: 185. doi: 10.4172/2469-410X.1000185","PeriodicalId":92245,"journal":{"name":"Journal of lasers, optics & photonics","volume":"46 1","pages":"1-6"},"PeriodicalIF":0.0,"publicationDate":"2018-01-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"87409850","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 0

UV detection on artificial uric acid using UV-Vis spectrometer 紫外可见分光光度计对人工尿酸的紫外检测

Journal of lasers, optics & photonics Pub Date : 2018-01-01 DOI: 10.4172/2469-410X.1000179

N. Norazmi, Abdul Rasat Zr, M. Mohamad, H. Manap

{"title":"UV detection on artificial uric acid using UV-Vis spectrometer","authors":"N. Norazmi, Abdul Rasat Zr, M. Mohamad, H. Manap","doi":"10.4172/2469-410X.1000179","DOIUrl":"https://doi.org/10.4172/2469-410X.1000179","url":null,"abstract":"The aim of this research work is to measure the concentration and absorption cross-section of artificial uric acid in the Ultraviolet (UV) region using UV-Vis spectrometer. The uric acid sample comes in powder form which has to be dissolved with distilled water to convert it into liquid form. Therefore, it can be placed in the cuvette for the analysis purposes. This research study was proposed to make a comparison with the previous research studies that uric acid was normally extracted from human serum as a real sample. This research study was carried out using an artificial sample of uric acid with the suspended or grits of uric acid which were not totally dissolved. These grits might be artificially assumed as crystallites which is common with Gout disease. Based on the medical perspective, crystallites normally inhibit the human joints which may cause intense pain to the human bones or tissues. In the experiment, the distilled water was used a background or reference spectrum which can be stored and automatically deducted using the Spectra suite software application. Thus, Spectra suite only measures the pure concentration and UV absorption wavelength of the uric acid through the use of the spectrometer. The absorbance data was extracted and substituted into Beer’s Lambert Law formula to calculate the value of absorption cross-section. The result shows that the value of UV absorption wavelength and absorption cross-section is really close as reported in the previous research studies. It proves that even the artificial sample of uric acid with the grits still can give a very close result. The UV absorption of uric acid was obtained at 293.99 nm by four different concentrations. The response time was successfully done in 3 seconds. The resulting curves have noise signals which can be analyzed and reduced using an averaging method to make the curve look sharper and lack of noise.","PeriodicalId":92245,"journal":{"name":"Journal of lasers, optics & photonics","volume":"1 1","pages":"1-4"},"PeriodicalIF":0.0,"publicationDate":"2018-01-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"84307380","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 3

Concentration, Wavelength and Temperature Dependent Refractive Index of Sugar Solutions and Methods of Determination Contents of Sugar in Soft Drink Beverages using Laser Lights 糖溶液的浓度、波长和温度随折射率的变化及激光测定软饮料中糖含量的方法

Journal of lasers, optics & photonics Pub Date : 2018-01-01 DOI: 10.4172/2469-410X.1000187

A. Belay, G. Assefa

{"title":"Concentration, Wavelength and Temperature Dependent Refractive Index of Sugar Solutions and Methods of Determination Contents of Sugar in Soft Drink Beverages using Laser Lights","authors":"A. Belay, G. Assefa","doi":"10.4172/2469-410X.1000187","DOIUrl":"https://doi.org/10.4172/2469-410X.1000187","url":null,"abstract":"The concentration, wavelength and temperature dependent refractive index of sugar solution has been investigated. The refractive index of sugar solutions (5%-50%) obtained using Red Diode Laser, Green Diode Laser and He-Ne Laser light were found to be in the range of (1.3357-1.4117), (1.3467-1.4272) and (1.3380-1.4140) respectively. The refractive index has linear relationship with the concentration of sugar solution. Mathematical expressions were also derived for the wavelength dependent refractive index of sugar solution by fitting Cauchy’s equation to the experimental data using non-linear curve at the minimum discrepancy. The empirical expression of temperature dependent of refractive index of the sugar solution was determined; and the result indicates that, as the temperature increases the refractive index of the solutions decrease the method was also applied to determine the sugar contents in soft drink beverages (Pepsi, Coca, 7up, Sprite, Fanta and Mirinda). The results in g/100 ml are: (10.48 ± 0.001), (10.42 ± 0.001), (10.42 ± 0.001), (6.79 ± 0.002), (7.03 ± 0.001) and (9.89 ± 0.002) respectively. The techniques are simple, fast and inexpensive. Citation: Belay A, Assefa G (2018) Concentration, Wavelength and Temperature Dependent Refractive Index of Sugar Solutions and Methods of Determination","PeriodicalId":92245,"journal":{"name":"Journal of lasers, optics & photonics","volume":"226 1","pages":"1-5"},"PeriodicalIF":0.0,"publicationDate":"2018-01-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"74675257","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 20

Inhomogeneous Model for the Investigation of the Optical Properties of the A-Plane Oriented ZnO Epilayers Grown by Plasma-Assisted Molecular Beam Epitaxy 等离子体辅助分子束外延生长的a面取向ZnO薄膜光学特性研究的非均匀模型

Journal of lasers, optics & photonics Pub Date : 2018-01-01 DOI: 10.4172/2469-410X.1000186

A. Diouf, B. Lo, B. Ngom, A. Beye

引用次数: 0

Comparison of Phosphoric Acid 37% and Er:YAG Laser Used to Prepare Dental Enamel Palatal Surface before Bonding Braces 37%磷酸激光与Er:YAG激光在牙釉质腭面粘接前制备的比较

Journal of lasers, optics & photonics Pub Date : 2018-01-01 DOI: 10.4172/2469-410X.1000178

Pin-Hua Ll, Pinheiro Nl, M. F. Cavalcanti, Joseli Maria Cordeiro, R. L. Marcos, dos Santos Mt, L. Frigo

{"title":"Comparison of Phosphoric Acid 37% and Er:YAG Laser Used to Prepare Dental Enamel Palatal Surface before Bonding Braces","authors":"Pin-Hua Ll, Pinheiro Nl, M. F. Cavalcanti, Joseli Maria Cordeiro, R. L. Marcos, dos Santos Mt, L. Frigo","doi":"10.4172/2469-410X.1000178","DOIUrl":"https://doi.org/10.4172/2469-410X.1000178","url":null,"abstract":"Background: Adhesion of braces to dental enamel is critical for orthodontic treatments, for that purpose, phosphoric acid has been used successfully to prepare dental enamel surface before bonding braces. ER:YAG laser has proved ability to do the same over buccal surfaces of dental enamel, but the increasing interest for lingual orthodontics leaded to the question whether ER:YAG laser can prepare equally palatal and buccal surfaces for bonding lingual braces. Material and methods: 15 teeth that were extracted for clinical purposes were microscopic electronic scanned (MES) before treatment, after phosphoric acid 37%, and after ER:YAG laser irradiated, images of buccal and palatal faces after each treatment were analyzed by image J software. Results: After all treatments enamel surfaces were mostly type 1, no statistically significant differences were found between groups. Conclusion: Phosphoric acid 37% and the used dose of Er:YAG laser can successfully prepare dental enamel surface before bonding braces over buccal and palatal faces of teeth.","PeriodicalId":92245,"journal":{"name":"Journal of lasers, optics & photonics","volume":"5 1","pages":"1-5"},"PeriodicalIF":0.0,"publicationDate":"2018-01-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"74372113","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 0

Non-Linear Optical Properties of Nano Particle C60 Fullerene Using Lasers 纳米粒子C60富勒烯的激光非线性光学性质

Journal of lasers, optics & photonics Pub Date : 2018-01-01 DOI: 10.4172/2469-410X.1000182

Subramaniam Tk, G. Vinitha, J. Cv, R. Premanand

引用次数: 4