Search for dissertations about: "fresnel lens"

Showing result 1 - 5 of 6 swedish dissertations containing the words fresnel lens.

  2. 1. A Stacked Prism Lens Concept for Next-Generation Hard X-Ray Telescopes

    Author : Wujun Mi; Mats Danielsson; Peter Nillius; Ralf K. Heilmann; KTH; []
    Keywords : TEKNIK OCH TEKNOLOGIER; ENGINEERING AND TECHNOLOGY; NATURVETENSKAP; NATURAL SCIENCES; NATURVETENSKAP; NATURAL SCIENCES; focusing X-ray telescopes; Wolter-I optics; stacked prism lens; focused UV lithography; grayscale e-beam lithography; proximity effect correction; angular resolution; effective collecting area; röntgenteleskop; Wolter-I-optik; staplade prismalinser; fokuserad UV-litografi; elektronstråle-litografi; Fysik; Physics;

    Abstract : Over the past half century, the focusing X-ray telescope has played a very prominent role in X-ray astronomy at the frontier of fundamental physics. The finer angular resolution and increased effective area have enabled more and more exciting discoveries and detailed studies of the high-energy universe, including the cosmic X-ray background (CXB) radiation, black holes in active galactic nuclei (AGN), galaxy clusters, supernova remnants, and so on. READ MORE

  4. 2. Studies in Physiological Optics and Microwave Hyperthermia

    Author : Claes M. E. Beckman; Chalmers tekniska högskola; []
    Keywords : NATURVETENSKAP; NATURAL SCIENCES; optics; cancer treatment; light scattering;

    Abstract : This thesis deals with the optics of the eye, the sky and microwave induced hyperthermia treatment of cancer. Light scattering in normal eyes is reviewed and its influence on vision is discussed in some detail. READ MORE

  5. 3. Polymer Microoptics in Silicon Micromachining

    Author : Karin Hedsten; Chalmers tekniska högskola; []
    Keywords : TEKNIK OCH TEKNOLOGIER; ENGINEERING AND TECHNOLOGY; MOEMS; amorphous fluorocarbon polymer; polymer microlens; silicon micromachining; replication; refractive lenses; diffractive optics; MEMS; Cytop™; transmissive microoptics; reflow;

    Abstract : MEMS (micro-electro-mechanical system) technology is an established field, which makes use of the advanced state of silicon processing to fabricate complex electro-mechanical structures and devices. Microoptics is a new, but advanced technology within the field of optics. READ MORE

  6. 4. Solar cavity receiver design for a dish-Stirling system

    Author : Jorge Garrido Gálvez; Björn Laumert; Uwe Gampe; KTH; []
    Keywords : Concentrating Solar Power; Solar receiver; Solar simulator; Uncertainty analysis; Monte Carlo ray tracing; Experimental validation; Coatings; System modeling; Structural analysis; Creep damage; Thermal stress; Cavity receiver design; Energy Technology; Energiteknik;

    Abstract : The growing concern for the climate change has led to an increasing research effort in renewable energy technologies in order to achieve a more sustainable electricity production. Concentrating Solar Power (CSP) is identified as a promising technology to deal with part of the future electricity production. READ MORE

  7. 5. Axicon imaging by scalar diffraction theory

    Author : Anna Burvall; KTH; []
    Keywords : axicons; diffractive optics; coherence; asymptotic methods; communication modes; information content; inverse problems;

    Abstract : Axicons are optical elements that produce Bessel beams,i.e., long and narrow focal lines along the optical axis. Thenarrow focus makes them useful ine. READ MORE