Sökning: "lenses"

Visar resultat 6 - 10 av 156 avhandlingar innehållade ordet lenses.

  1. 6. Ocular aberrations and visual quality in aspherical and multifocal contact lenses

    Författare :Anna Lindskoog Pettersson; Karolinska Institutet; Karolinska Institutet; []
    Nyckelord :Contact lenses;

    Sammanfattning : Good visual quality and precise accommodation are required to be able to focus objects at distance and near, and are essential in order to be able to perform most tasks in life. Most eyes are not ideal eyes, i.e., they have different refractive errors which distort the produced image. LÄS MER

  3. 7. Morphological and Physiological Adaptations in Cichlid Crystalline Lenses

    Författare :Marcus Schartau; Biologiska institutionen; []
    Nyckelord :NATURVETENSKAP; NATURAL SCIENCES; NATURVETENSKAP; NATURAL SCIENCES; SKF-38393; D1-agonist; optical properties 6-hydroxydopamine; optical measurements; organ culture; dopamine; teleost; lens circulation; Lens; SCH-23390; melatonin; multifocal optical system;

    Sammanfattning : Vertebrate eyes share a common ancestry as well as the basic design with a pupil, a retina and a lens. The lens is essential for perceiving the details in the world around us and ensures that a sharp image of the surroundings is focused onto the photoreceptors in the retina. LÄS MER

  4. 8. Focus on Chronic Disease through Different Lenses of Expertise : Towards Implementation of Patient-Focused Decision Support Preventing Disability: The Example of Early Rheumatoid Arthritis

    Författare :Örjan Dahlström; Toomas Timpka; Ingrid Thyberg; Ursula Hass; Ingemar Petersson; Linköpings universitet; []
    Nyckelord :SAMHÄLLSVETENSKAP; SOCIAL SCIENCES; Clinical Decision Support; Rheumatology; Prognosis; Disability; Fatigue; Knowledge Engineering; Kliniskt beslutsstöd; reumatologi; prognos; funktionshinder; trötthet; kunskapsmodellering; Disability research; Handikappsforskning;

    Sammanfattning : Introduction: Rheumatoid arthritis (RA) is a chronic inflammatory disease. Treatment strategies emphasize early multi-professional interventions to reduce disease activity and to prevent disability, but there is a lack of knowledge on how optimal treatment can be provided to each individual patient. LÄS MER

  5. 9. Polymer Microoptics in Silicon Micromachining

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

    Sammanfattning : 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. LÄS MER

  7. 10. Design and Performance of Some Components for a Millimeter Wave Imaging Receiver

    Författare :Guillermo F. Delgado Gunckel; Chalmers tekniska högskola; []
    Nyckelord :NATURVETENSKAP; NATURAL SCIENCES; TEKNIK OCH TEKNOLOGIER; ENGINEERING AND TECHNOLOGY; nipi MQW; imaging receiver; lens shaping; diplexer; kinoform; opto-electronic quasi-optical modulation; dielectric lenses; sideband filter; diffractive optics;

    Sammanfattning : This thesis deals with the design and performance of some novel devices for an imaging receiver, operating in the frequency band centered at 100 GHz, to be used in radio astronomy research. The emphasis is given on simple, small and reliable devices in order to reduce the complexity of an already complex receiver. LÄS MER