Sökning: "laser machining"

Visar resultat 16 - 20 av 28 avhandlingar innehållade orden laser machining.

  1. 16. 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

  3. 17. Micro-Optical Elements in Gallium Arsenide and Diamond: Fabrication and Applications

    Författare :Mikael Karlsson; James R. Leger; Uppsala universitet; []
    Nyckelord :TEKNIK OCH TEKNOLOGIER; ENGINEERING AND TECHNOLOGY; Materials science; Materialvetenskap; Materials science; Teknisk materialvetenskap; Materialvetenskap; Materials Science;

    Sammanfattning : This thesis mainly treats the fabrication and applications of micro-optical elements in the semiconductor materials gallium arsenide (GaAs) and diamond.The recent trend in high-capacity data transfer using light as the information carrier creates new demands on the optoelectronic systems, such as small size, low cost and the integration of many components. LÄS MER

  4. 18. Manufacture of High Efficiency Surface Relief Computer Generated Holograms

    Författare :Mats Ekberg; Chalmers tekniska högskola; []
    Nyckelord :NATURVETENSKAP; NATURAL SCIENCES; kinoforms; ;

    Sammanfattning : This thesis treats design, manufacture, evaluation and applications of computer-generated surface relief holograms - kinoforms. These diffractive, phase-only, planar optical components are characterized by high efficiency, design flexibility, light weight and small size. They can further be reproduced at low cost. LÄS MER

  5. 19. Study of High Efficiency Phase-Only Diffractive Optical Elements

    Författare :J. Michael Larsson; Chalmers tekniska högskola; []
    Nyckelord :NATURVETENSKAP; NATURAL SCIENCES; array illuminators; computer generated phase holograms; computer simulations; diffractive bifocal intraocular lenses; kinoforms; design; manufacture; diffractive optical elements; evaluation; simulation;

    Sammanfattning : This work deals with the design, simulation, manufacture, and evaluation of diffractive optical elements. Particularly, kinoforms and diffractive bifocal intraocular lenses are studied. Evaluation of kinoforms, i.e. LÄS MER

  7. 20. Application and Design Developments in Diffractive Optics

    Författare :Mathias Johansson; Chalmers tekniska högskola; []
    Nyckelord :TEKNIK OCH TEKNOLOGIER; ENGINEERING AND TECHNOLOGY; analog-to-digital converter; free-space optical interconnect; beam shaper; robust fan-out; multichannel rotary joint; diffractive optics; DOE; subwavelength grating; spatial light modulator SLM ;

    Sammanfattning : There has been strong development in the field of diffractive optics (DO) in research laboratories over the past two decades. Much progress has been made, both in design and analysis, as well as in manufacturing techniques. However, so far DO have only reached the market in small numbers. LÄS MER