Authors considered the possibility of designing a non-invasive biomedical Raman spectrophotometer for the near infrared range using an ellipsoidal reflector as a collecting and focusing optical element to evaluation the biological media components, particularly glucose level. The technical solution for creating the spectrophotometer and its prototype are presented in this paper. The research of the experimental setup was observed faster and more sensitive photodetector reaction to the dynamic blood glucose changes of concentration. Practical testing was carried out by the Raman shift signal measuring on healthy volunteers at different time intervals with food intake associated. The experimental setup principles can be used to design a portable non-invasive glucometer or to quantitatively analyses the chemical composition of biological objects by changing Raman filters.
(Ga0.4In0.6)2Se3 thin films were deposited by thermal evaporation technique. Refractive index and extinction coefficient dispersions were obtained from the spectral ellipsometry measurements. The dispersion of refractive index is described in the framework of Wemple-DiDomenico model. The energy pseudogap and Urbach energy were determined from the optical absorption spectrum of (Ga0.4In0.6)2Se3 thin film. Optical parameters of (Ga0.4In0.6)2Se3 thin film and single crystal were compared.
The results of an experimental study of obtaining approximate solutions of the multidimensional knapsack problem are presented in the paper. Three methods for obtaining these solutions are considered, based on branch-end-bound algorithms with a one-sided branching. One hundred test tasks of different dimensions have been solved for each method. The estimation of the approximation of the solutions obtained in relation to the best solution is provided, as well as the estimation of the computational complexity.
This paper presents the results of experiment determining the dependence of shift in spectral characteristics of Bragg gratings as a function of energy supplied to the optical fibre in the process of producing optical fibre periodic structures. The experiment was performed in an excimer laser system for two optical fibres with different photosensitivity.
In the article the physical mechanism of optical radiation co-operation with semiconductor devices, technological route of making of MOS - phototransistor with bilateral illumination of channel has been considered. Also the optical transducer with frequency output based on the structure of the bipolar-field transistors with negative resistance and MOSFET with bilateral illumination of channel that is a photosensitive element has been considered. A mathematical model of the radio measuring optical transducer has been developed.
Pulse laser deposition technique was used to deposite (Ag3AsS3)0.6(As2S3)0.4 thin films upon previously prepared gold nanoparticle layers. The optical transmission spectra of sandwich structure based on Ag3AsS3)0.6(As2S3)0.4 thin film and gold nanoparticles were studied in the temperature range 77-300 K. Temperature behaviour of the Urbach absorption edge as well as the temperature dependences of the energy pseudogap and Urbach energy were investigated. The effect of the order-disorder processes on the optical properties of sandwich structure was discussed. Optical parameters of Ag3AsS3)0.6(As2S3)0.4 thin film and sandwich structure based on (Ag3AsS3)0.6(As2S3)0.4 thin film and gold nanoparticles were compared.
The paper deals with important issues of diagnosis early signs of diseases of the nervous system, including Parkinson's disease and other specific diseases. Small quantities of violation trajectory of spatial movement of the extremities of human disease at the primary level as the most appropriate features are studied. In modern medical practice is very actual the control the emergence of diseases of the nervous system, including Parkinson's disease. In work a model limbs with six rotational kinematic pairs for diagnosis of early signs of diseases of the nervous system is considered. subject.
This paper proposes a simple mathematical model of heating process of the human skin and adjacent inner layers with the LED radiation used in the prevention and treatment devices for various diseases. The problem takes into account the heat removal by blood flow to the vessels. It is shown that abnormal blood flow due to the compression of tissue can lead to severe heating of the body and its burn. This may result even from using small LEDs of 2,5-30 mW.
To understand and evaluate the Optical Layer, and how it will affect the IP protocols over WDM (Switching), the present analyse is proposed. Optical communications have attractive proprieties, but also have some disadvantages, so the challenge is to combine the best of both branches. In this paper, general concepts for different options of switching are reviewed as: optical burst switching (OBS) and automatically switching optical network (ASON). Specific details such as their architectures are also discussed. In addition, the relevant characteristics of each variation for switching are reviewed.
This paper is devoted to describing the basic principles of operation, modeling and possibilities of application of high voltage glow discharge electron guns for realising of different technological operations in the different branches industry. Both diode and triode electrodes systems and particularities of its’ simulation are considered and examples of realizing different technological operations are given.
The aim of this work is the development of a reference source of subnanosecond pulses based on SiC breakdown LEDs. The micro-alloy technology of p-n junctions based on SiC-6H with a diameter of about 50 microns has been developed. The capacity of such structures does not exceed 10-20 pF. The high stability and current overload resistance of the samples were provided by the uniform microplasma breakdown structure. The breakdown electroluminescence spectrum of the investigated samples was flat and covered the range of 400-800 nm and the relaxation time did not exceed 0,25 ns (a time resolution of measuring system). The radiation power was about 10-6 W/A.
Access to the requested content is limited to institutions that have purchased or subscribe to SPIE eBooks.
You are receiving this notice because your organization may not have SPIE eBooks access.*
*Shibboleth/Open Athens users─please
sign in
to access your institution's subscriptions.
To obtain this item, you may purchase the complete book in print or electronic format on
SPIE.org.
INSTITUTIONAL Select your institution to access the SPIE Digital Library.
PERSONAL Sign in with your SPIE account to access your personal subscriptions or to use specific features such as save to my library, sign up for alerts, save searches, etc.