Sökning: "moire interferometry"

Hittade 4 avhandlingar innehållade orden moire interferometry.

  1. 1. Ferroelectric domain engineering and characterization for photonic applications

    Författare :Simonetta Grilli; Fredrik Laurell; Wolfgang Sohler; KTH; []
    Nyckelord :NATURVETENSKAP; NATURAL SCIENCES; LiNbO; KTiOPO; interferometry; digital holography; electric field poling; electro-optic materials; holographic lithography; ferroelectric domains; nanostructures; microstructures; Optical physics; Optisk fysik;

    Sammanfattning : Lithium niobate (LiNbO3) and KTiOPO4 (KTP) are ferroelectric crystals of considerable interest in different fields of optics and optoelectronics. Due to its large values of the nonlinear optical, electro-optic (EO), piezoelectric and acousto-optical coefficients, LiNbO3 is widely used for laser frequency conversion using the quasiphase matching (QPM) approach where the sign of nonlinearity has been periodically modulated by electric field poling (EFP). LÄS MER

  3. 2. Composites studied by moiré methods and high speed photography

    Författare :L. Gunnar Melin; Luleå tekniska universitet; []
    Nyckelord :TEKNIK OCH TEKNOLOGIER; ENGINEERING AND TECHNOLOGY; Experimental Mechanics; Experimentell mekanik;

    Sammanfattning : Fibre composites are today used as construction material in a growing number of applications. Carbon fibres/epoxy matrix composites are employed in high performance applications as aircrafts where a high stiffness/weight ratio is important. LÄS MER

  4. 3. Healing of tympanic membrane perforations : an experimental study

    Författare :Anisur Rahman; Karolinska Institutet; Karolinska Institutet; []
    Nyckelord :Embryonic stem cells; Healing; Immunosuppressive; Laser; Mesenchymal stem cells; Moiré interferometry; Myringotomy; Perforation; Tympanic membrane;

    Sammanfattning : Most acute tympanic membrane perforations heal spontaneously without any residual complication, whereas a fraction transforms into a chronic perforation. The current treatment of a chronic perforation is surgical repair, which is a costly, time consuming and uncomfortable procedure particularly for the pediatric patients. LÄS MER

  5. 4. Stiffness changes of the tympanic membrane in otitis media

    Författare :Christina Larsson; Karolinska Institutet; Karolinska Institutet; []
    Nyckelord :Tympanic membrane; pars flaccida; stiffness; otitis media with effusion; purulent otitis media; cholesteatoma; moire interferometry; tympanometry; gerbil.;

    Sammanfattning : Acute purulent otitis media and otitis media with effusion, are common diseases in childhood. Years later some of the children will get "complications", such as retraction pockets and cholesteatoma, that often need advanced surgical treatment. LÄS MER