Sökning: "axicon"

Hittade 4 avhandlingar innehållade ordet axicon.

  1. 1. Diffractive Optical Elements: Fabrication, Replication, and Applications and Optical Properties of a Visual Field Test

    Författare :Fredrik Nikolajeff; Chalmers tekniska högskola; []
    Nyckelord :TEKNIK OCH TEKNOLOGIER; ENGINEERING AND TECHNOLOGY; perimetry; beam homogenizing; antireflection; high-pass spatial frequency target; proximity effect; electron beam lithography; replication; successive development; diffractive optical element; axicon;

    Sammanfattning : This thesis mainly treats the fabrication, replication and applications of diffractive optical elements. A smaller part deals with optical properties of a visual field test. Diffractive optical elements are computer-generated micro-optic components that use diffraction to manipulate light. LÄS MER

  3. 2. Axicon imaging by scalar diffraction theory

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

    Sammanfattning : 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. LÄS MER

  4. 3. Structural Information Content of the Optical Field

    Författare :Per Martinsson; Ari Friberg; Karl-Heinz Brenner; KTH; []
    Nyckelord :TEKNIK OCH TEKNOLOGIER; ENGINEERING AND TECHNOLOGY; Photonics; Fotonik;

    Sammanfattning :  The communication modes are a mathematical technique for the description of structural information in optical fields. These modes are orthogonal, optimally  connected functions characteristic of the optical system. Mathematically they are obtained by the singular value decomposition (SVD) of the operator that represents the field propagation. LÄS MER

  5. 4. Asymptotic methods in design and characterization ofdiffractive axicons

    Författare :Anna Thaning; KTH; []
    Nyckelord :axicons; diffractive optics; coherence; asyptotic methods;

    Sammanfattning : This thesis addresses the subject of diffractive axicons inpartially coherent or oblique illumination. Design andcharacterization of the axicons are performed using asymptoticwave optics, employing the stationary-phase method to obtainapproximations of the diffraction integrals. LÄS MER