Sökning: "Optical force measurement"

Visar resultat 1 - 5 av 19 avhandlingar innehållade orden Optical force measurement.

1. 1. Advances in Holographic Optical Trapping

   Författare :Martin Persson; Göteborgs universitet; []
   Nyckelord :NATURVETENSKAP; NATURAL SCIENCES; Optical tweezers; Holographic optical trapping; Optical force measurement; Spatial light modulators; Holographic beam steering; Liquid crystals;

   Sammanfattning : Holographic optical trapping (HOT) is a technique for non-invasive dynamic anipulation of multiple microscopic objects, which has been used for many applications in the life sciences during the past decade. The technique uses holographic beam steering with a spatial light modulator (SLM) to direct light to the desired positions of optical traps. LÄS MER

3. 2. Spindle vibration and sound field measurement using optical vibrometry

   Författare :Kourosh Tatar; Luleå tekniska universitet; []
   Nyckelord :TEKNIK OCH TEKNOLOGIER; ENGINEERING AND TECHNOLOGY; Strömningslära; Fluid Mechanics;

   Sammanfattning : Mechanical systems often produce a considerable amount of vibration and noise. To be able to obtain a complete picture of the dynamic behaviour of these systems, vibration and sound measurements are of significant importance. Optical metrology is well-suited for non-intrusive measurements on complex objects. LÄS MER

4. 3. Diffuse Optical Spectroscopy and Imaging of Turbid Media

   Författare :Can Xu; Atomfysik; []
   Nyckelord :NATURVETENSKAP; NATURAL SCIENCES; upconverting nanoparticles; luminescence; fluorescence; inverse problem; diffuse reflection spectroscopy; biomedical optics; photon migration; biomedical imaging; gas spectroscopy; medical diagnostics; tomography; Fysicumarkivet A:2013:Xu;

   Sammanfattning : This thesis deals with optical spectroscopy and imaging of complex and strongly scattering turbid media. Focus is mainly placed on three topics, being i) diffuse optical spectroscopy of choroidal tumors, ii) gas spectroscopy in scattering materials using the GASMAS (gas in scattering media absorption spectroscopy) technique, and iii) luminescence diffuse optical imaging and tomography of tissues. LÄS MER

5. 4. A study of bacterial adhesion on a single-cell level by means of force measuring optical tweezers and simulations

   Författare :Oscar Björnham; Staffan Schedin; Ove Axner; Kirstine Berg-Sörensen; Umeå universitet; []
   Nyckelord :NATURVETENSKAP; NATURAL SCIENCES; Physics; Fysik; fysik; Physics; cell research; cellforskning; molecular cell biology; molekylär cellbiologi;

   Sammanfattning : The intriguing world of microbiology is nowadays accessible for detailed exploration at a single–molecular level. Optical tweezers are a novel instrument that allows for non–invasive manipulation of single cells by the sole use of laser light and operates on the nano– and micrometer scale which corresponds to the same length scale as living cells. LÄS MER

7. 5. Surface characterization and manipulation of polyampholytic hydrogel coatings

   Författare :Feng-I Tai; Thomas Ederth; Bo Liedberg; Lei Ye; Linköpings universitet; []
   Nyckelord :NATURVETENSKAP; NATURAL SCIENCES; Hydrogels; antifouling; charge-balanced material; polyampholytes; force measurements; polymer swelling; protein adsorption; patterning; plasmonics;

   Sammanfattning : This thesis is dedicated to building up fundamental knowledge about polyampholytic hydrogels, which are developed in our group for anti-fouling purposes. Charge-balanced polymers, where positive and negative charges balance each other, have emerged as interesting candidates for many applications in materials science. LÄS MER