Search for dissertations about: "laser speckle"

Showing result 1 - 5 of 29 swedish dissertations containing the words laser speckle.

2. 1. Partially Coherent Laser Radiation - Modeling and Application to Optical Microlithography

   Author : Christer Rydberg; Chalmers tekniska högskola; []
   Keywords : TEKNIK OCH TEKNOLOGIER; ENGINEERING AND TECHNOLOGY; microlithography; coherence; temporal speckle; partial coherence; optical propagation; number of degrees of freedom; dynamic speckle;

   Abstract : This work deals with a type of light that has properties somewhere between blackbody radiation and conventional laser light; such light is referred to as partially coherent. One example is the radiation from the pulsed excimer laser, which is used in the manufacturing of most of the worlds integrated circuits. READ MORE

4. 2. Laser Speckle Contrast Imaging in Reconstructive Surgery

   Author : Johan Zötterman; Simon Farnebo; Erik Tesselaar; Jacob Wikner; Henry Svensson; Linköpings universitet; []
   Keywords : TEKNIK OCH TEKNOLOGIER; ENGINEERING AND TECHNOLOGY;

   Abstract : ObjectivesReconstructive surgery aims to restore function or normal appearance by reconstructing defective organs after trauma or disease. In patients undergoing reconstructive surgery, previous trauma, surgery or radiotherapy can result in compromised blood supply. READ MORE

5. 3. Quantitative Laser Doppler Flowmetry

   Author : Ingemar Fredriksson; Tomas Strömberg; Marcus Larsson; Weindelt Stenbergen; Linköpings universitet; []
   Keywords : TEKNIK OCH TEKNOLOGIER; ENGINEERING AND TECHNOLOGY; Medical engineering; Medicinsk teknik;

   Abstract : Laser Doppler flowmetry (LDF) is virtually the only non-invasive technique, except for other laser speckle based techniques, that enables estimation of the microcirculatory blood flow. The technique was introduced into the field of biomedical engineering in the 1970s, and a rapid evolvement followed during the 1980s with fiber based systems and improved signal analysis. READ MORE

6. 4. Real-time multi-exposure laser speckle contrast imaging of skin microcirculatory perfusion

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

   Abstract : 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. READ MORE

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

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

   Abstract : 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. READ MORE