Sökning: "Digital Holography"

Visar resultat 16 - 20 av 23 avhandlingar innehållade orden Digital Holography.

  1. 16. Combination of optical methods for studies in combustion and wave propagation

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

    Sammanfattning : In this thesis, different optical methods were combined for studies of combustion processes in gases and transient wave propagation in plates and water. Pulsed TV holography was used in all these projects. LÄS MER

  3. 17. Combined speckle interferometry and speckle correlation for non-destructive testing

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

    Sammanfattning : When a sample is studied during loading in a tensile test machine, the sample is often exposed to rigid body motions during loading at the same time as it deforms due to tension. Therefore, the small deformation field is hard, or impossible, to measure when it is overlaid by a large motion. LÄS MER

  4. 18. Optical methods for the study of transparent media

    Författare :Eva-Lena Johansson; []
    Nyckelord :TEKNIK OCH TEKNOLOGIER; ENGINEERING AND TECHNOLOGY; Experimental Mechanics; Experimentell mekanik;

    Sammanfattning : In the fields of combustion and fluid mechanics, temperature-, density- and velocity fields are of interest to measure. Optical methods may be used to study transparent media, even transient events. Flames, gases and liquids are examples on transparent media, often called phase objects. LÄS MER

  5. 19. Material and technique development for ultrasound optical tomography using spectral hole burning filters

    Författare :Alexander Bengtsson; NanoLund: Centre for Nanoscience; []
    Nyckelord :NATURVETENSKAP; NATURAL SCIENCES; Biomedical imaging; ultrasound optical tomography; acousto-optical tomography; rare-earth-ion doped crystals; spectral holeburning; slow light filters; Tm 3:LaF3; Fysicumarkivet A:2022:Bengtsson;

    Sammanfattning : The molecular sensitivity provided by optical photons has potential advantages in medical diagnostics, for example, in distinguishing healthy from cancerous tissue. However, scattering resulting from inhomogeneities in the refractive index of tissues prevents spatially resolved optical measurements in biological material, except at very shallow depths. LÄS MER

  7. 20. Second-generation High-Order Harmonic Sources — From CPA to OPCPA

    Författare :Piotr Rudawski; Atomfysik; []
    Nyckelord :NATURVETENSKAP; NATURAL SCIENCES; Optical parametric chirped pulse amplification; Fysicumarkivet A:2014:Rudawski; Chirped pulse amplification; High-order harmonic generation; Attosecond pulse;

    Sammanfattning : This thesis presents two sources of extreme ultraviolet (XUV) radiation based on high-order harmonic generation (HHG) in gases. The sources were developed for experiments requiring high-flux harmonic beams or HHG pulses at high-repetition rate. These were used experimentally to image nano-scale objects. LÄS MER