Sökning: "axicons"

Hittade 2 avhandlingar innehållade ordet axicons.

1. 1. 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

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