Essays about: "gratings"

Showing result 1 - 5 of 21 essays containing the word gratings.

  1. 1. Phase-Contrast Imaging, Towards G2-less Grating Interferometry With Deep Silicon

    University essay from KTH/Fysik

    Author : Rickard Brunskog; [2022]
    Keywords : Phase-contrast imaging; phase-contrast; CT-scanning; Computed-tomography; 1 micrometer resolution x-ray; grating-less phase-contrast imaging; Faskontraströntgen; faskontrast; CT-skanning; 1 mikrometer upplösning x-ray; gitterlös faskontrast; datortomografi;

    Abstract : Conventional phase-contrast imaging entails stepping an analyser grating across the detector to resolve the interference pattern caused by the x-rays after passing through a series of gratings in a so-called Talbot-Lau interferometer. However, the analyser grating in the interferometer poses a challenge, not only due to the machinery and alignment required but also due to each exposure delivering a dose to the subject. READ MORE

  3. 2. Simultaneous measurement and discrimination of temperature and strain in distributed fiber optical systems with fiber Bragg gratings

    University essay from Uppsala universitet/Fasta tillståndets fysik

    Author : Helene Alexandra Mastrothanasis; [2021]
    Keywords : ;

    Abstract :  This master thesis deals with simultaneous measurement and discrimination of temperature and strain using fiber Bragg gratings(FBGs). Saab Avionics is seeking for a further development of the overheat detection system that gives a warning when a heat leakage is detected. READ MORE

  4. 3. Design automation in industrial order-to-delivery processes : Enabling mass customization of made-to-order products

    University essay from Linköpings universitet/Maskinkonstruktion

    Author : Måns Olander; Anton Lüning; [2021]
    Keywords : Design Automation; KBE; Mass Customization; Product Configurator;

    Abstract : Today's manufacturing industry is heading more and more towards a mass customization approach. This enables customers to individually specify product characteristics and unique design features to fulfill their exact needs. A common way to accomplish this is by means of design automation often used together with knowledge-based engineering. READ MORE

  5. 4. Transmission characterization of fiber Bragg gratings arrays for intracavity spectral control of a 1.5 micrometer fiber laser

    University essay from KTH/Skolan för teknikvetenskap (SCI)

    Author : Hu Leo Qiyuan; Pontus Jäderholm; [2021]
    Keywords : ;

    Abstract : This thesis aims to investigate whether a fiber Bragg grating array (FBGA) can be designed to reduce the bandwidth of light from a 1.5 µm fiber laser while the distances between the fiber Bragg gratings are in the 10-20 cm range. READ MORE

  6. 5. Periodic and Non-Periodic Filter Structures in Lasers

    University essay from KTH/Matematik (Avd.)

    Author : Leo Enge; [2020]
    Keywords : Laser; Grating Filters; Perturbation Theory; WKB Approximation; Bi-cubic Splines; Laser; optiska filter; störningsteori; WKB-approximation; bi-kubiska splines;

    Abstract : Communication using fiber optics is an integral part of modern societies and one of the most important parts of this is the grating filter of a laser. In this report we introduce both the periodic and the non-periodic grating filter and discuss how there can be resonance in these structures. READ MORE