Sökning: "speckle"

Visar resultat 11 - 15 av 114 avhandlingar innehållade ordet speckle.

  1. 11. White light and x-ray digital speckle photography

    Författare :Per Synnergren; Luleå tekniska universitet; []
    Nyckelord :TEKNIK OCH TEKNOLOGIER; ENGINEERING AND TECHNOLOGY; Experimental Mechanics; Experimentell mekanik;

    Sammanfattning : The goals of this work were not only to develop new measuring techniques, but also to validate their performance, in terms of accuracy, spatial resolution, etc., by performing carefully chosen experiments. The measuring techniques were also to be applicable to industrial problems in production, control or product development. LÄS MER

  3. 12. Real-time multi-exposure laser speckle contrast imaging of skin microcirculatory perfusion

    Författare :Martin Hultman; Ingemar Fredriksson; Marcus Larsson; Tomas Strömberg; Anne Heurtier; Linköpings universitet; []
    Nyckelord :TEKNIK OCH TEKNOLOGIER; ENGINEERING AND TECHNOLOGY; Multi-exposure laser speckle contrast imaging; Microcirculatory perfusion; Machine learning;

    Sammanfattning : The microcirculation, the blood flow in the smallest blood vessels in the body, has a vital function as this is where oxygen and nutrients diffuses from the blood to to the surrounding cells. An important quantity is the tissue perfusion, a measure of the microcirculation’s capacity to provide oxygen and nutrients to the cells. LÄS MER

  4. 13. Speckle interferometry and correlation applied to large-displacement fields

    Författare :Angelica Svanbro; []
    Nyckelord :TEKNIK OCH TEKNOLOGIER; ENGINEERING AND TECHNOLOGY; Experimental Mechanics; Experimentell mekanik;

    Sammanfattning : A common problem in experimental mechanics is that when a sample is studied in e.g. a tensile test machine, the sample is often exposed to rigid body motions at the same time as small deformations occur. These two movements, the rigid body motion and the deformation, are often talked about as displacement fields. LÄS MER

  5. 14. Perfusion Monitoring of Advancement and Rotational Flaps. Oculoplastic Surgery and Laser Speckle Contrast Imaging

    Författare :Cu Dybelius Ansson; Lund Oftalmologi; []
    Nyckelord :MEDICIN OCH HÄLSOVETENSKAP; MEDICAL AND HEALTH SCIENCES; flap; eyelid; oculoplastic; diathermic coagulation; laser speckle contrast imaging; perfusion; flap; eyelid; oculoplastic; diathermic coagulation; laser speckle contrast imaging;

    Sammanfattning : Flaps are widely used in oculoplastic reconstructive surgery to cover defects following the removal of tumors, malformations, or trauma. Adequate blood perfusion of the flap is crucial for its survival. Knowledge about the perfusion in different type of flaps is therefore of great value. LÄS MER

  7. 15. Investigation of laser drilling processing using Speckle Correlation techniques

    Författare :Natalia Miroshnikova; Luleå tekniska universitet; []
    Nyckelord :TEKNIK OCH TEKNOLOGIER; ENGINEERING AND TECHNOLOGY; Experimental Mechanics; Experimentell mekanik;

    Sammanfattning : A method to study the response in materials exposed to high energy laser pulses has been developed in this thesis. The method is based on focused and defocused Speckle Correlation and uses an illumination cw laser and digital camera to acquire images of speckle patterns. LÄS MER