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  • 1
    Electronic Resource
    Electronic Resource
    Amsterdam : Elsevier
    Optics Communications 68 (1988), S. 391-395 
    ISSN: 0030-4018
    Source: Elsevier Journal Backfiles on ScienceDirect 1907 - 2002
    Topics: Physics
    Type of Medium: Electronic Resource
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  • 2
    ISSN: 1432-0649
    Keywords: 42.65.Jx ; 78.20.Nv ; 78.65.Jd
    Source: Springer Online Journal Archives 1860-2000
    Topics: Physics
    Notes: Abstract The temperature field generated by the weak absorption of a gaussian laser beam in an optically and thermally thin film bounded by two transparent plates is discussed. An analytical solution of the problem is presented together with an algorithm for the numerical integration. The influence of the finite thermal conductivity of the plates is shown in an example.
    Type of Medium: Electronic Resource
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  • 3
    ISSN: 1432-0649
    Keywords: 42.10 Fa ; 42.60He ; 46.65K ; 42.80Sa
    Source: Springer Online Journal Archives 1860-2000
    Topics: Physics
    Notes: Abstract We have observed a hysteretic (bistable) reflection of a Gaussian laser beam at the interface between glass and a liquid solution of polystyrene microspheres as nonlinear medium with both branches of the hysteretic curve being stable, in contrast to the results of previous experiments.
    Type of Medium: Electronic Resource
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  • 4
    ISSN: 1432-0649
    Keywords: 42.80-f ; 07.00 ; 42.60-v
    Source: Springer Online Journal Archives 1860-2000
    Topics: Physics
    Notes: Abstract An experimental observation of the photophoretic motion of micro-sized particles suspended in air has been performed using the radiometric force from a continuous laser beam. The irradiation was used to trap the particles in a confined optical field and to levitate them. Complex photophoretic motion of the particles was observed in the focus of the beam.
    Type of Medium: Electronic Resource
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  • 5
    ISSN: 0392-6737
    Keywords: Thermal properties of matter (phenomenology, experimental techniques) ; Optical problems related to applications of laser beams ; Other topics in thermal properties of condensed matter
    Source: Springer Online Journal Archives 1860-2000
    Topics: Physics
    Description / Table of Contents: Riassunto Si presenta la validazione sperimentale di un modello matematico dei campi di temperatura generati dall’irraggiamento laser di campioni. Il test è stato eseguito sull’acqua, un materiale dai parametri termodinamici ben noti. I dati sperimentali sono stati ottenuti mediante interferometria microolografica. Il modello validato, congiuntamente al metodo microolografico, può essere usato per la caratterizzazione termica dei materiali.
    Abstract: Резюме Экспериментально докаэывается справедливость математической модели температурного поля, образованного при лазерном облучении образца. Проверка проводилась на воде, т.е. материале с хорошо известными термодина-мическими параметрами. Экспериментальные данные получены с номощью голографической интерферометрии. Предложенная модель может быть использована для определениа термодинамических свойств различных материалов.
    Notes: Summary The experimental validation of a mathematical model of the temperature field generated by the laser irradiation of a sample is shown. The test was performed on water, a material with well-known thermodynamic parameters. The experimental data were obtained by means of holographic interferometry. The validated model, in connection with the microholographic method, can be used to determine the thermodynamic properties of different materials.
    Type of Medium: Electronic Resource
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  • 6
    Electronic Resource
    Electronic Resource
    Springer
    Il nuovo cimento della Società Italiana di Fisica 10 (1988), S. 173-182 
    ISSN: 0392-6737
    Keywords: Bio-optics (effects of microwaves, light, laser and other electromagnetic waves)
    Source: Springer Online Journal Archives 1860-2000
    Topics: Physics
    Description / Table of Contents: Riassunto Si presenta un modello matematico per calcolo dell'intensità della radiazione nei tessuti biologici esposti a radiazione laser. L'equazione del trasporto radiativo indipendente dal tempo è risolta con la serie di Neumann. Ogni termine della serie rappresenta ordini di grandezza differenti dell'effetto di scattering interno. Questi effetti divengono importanti durante l'irraggiamento con laser ad argon e ND: YAG utilizzati in applicazioni mediche per la coagulazione e l'incisione. Il modello è in accordo al primo ordine con il termine di scattering singolo.
    Abstract: Резюме Предлагается математическая модель для вычисления интенсивности излучения в биологических тканях, подверженньх лазерному облучению. С помощью рядов Неймана решается не зависящее от времени уравнение переноса излучения. Каждый член ряда связан с различным порядком величнины эффекта внутреннего рассеяния. Определяется важность эффектов многократного рассеяния при облучении ион-аргоновым лазером и ND: YAG лазером, которые ирользуются как инструменты коагуляции или резания в хирургии. Показывается, что процесс взаимодействия соответствует картине однократного рассеяния.
    Notes: Summary A mathematical model is presented for the computation of intensity of radiation in biological tissues irradiated by laser. The time-independent transport radiative equation is solved in terms of a Neumann series. Each term of the series is associated with a different order of magnitude of the internal-scattering effect. The importance of these effects has been recognized during the irradiation by ion-argon and ND: YAG laser used as coagulting or cutting instruments in surgery applications. Agreement is found with the single-scattering picture.
    Type of Medium: Electronic Resource
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  • 7
    Electronic Resource
    Electronic Resource
    Springer
    Applied physics 44 (1987), S. 103-106 
    ISSN: 1432-0649
    Keywords: 66.10.Cb ; 42.65.Cq ; 78.20.Nv
    Source: Springer Online Journal Archives 1860-2000
    Topics: Physics
    Notes: Abstract In forced Rayleigh scattering of mixtures or suspensions the temperature gratings generate, by the Soret effect, concentration gratings that may be very important since they produce both a phase and an amplitude grating superimposed on the principal one. The experimental evidence of their influence was given by Thyagarajan and Lallemand using a mixture of carbondisulfide and ethanol. In this paper we study the temporal behaviour of the concentration grating versus the sample properties and its effect on the detected diffracted beam. Explicit expressions are given for the output intensity taking into account both the generated amplitude and phase gratings.
    Type of Medium: Electronic Resource
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