Display Settings:


Send to:

Choose Destination
See comment in PubMed Commons below
Appl Opt. 2004 Oct 20;43(30):5631-6.

Coupling of light from an LED into a thin light guide by diffractive gratings.

Author information

  • 1Department of Physics, University of Joensuu, P.O. Box 111, Joensuu, Finland FIN-80101.


Ring-shaped and radial diffractive gratings are designed with rigorous diffraction theory to couple light of a nearly monochromatic LED into a thin planar light guide on the bottom side. The theoretical coupling efficiencies for ring-shaped and radial gratings are 41% and 66%, respectively. Optimized diffractive elements are manufactured with direct electron-beam lithography and reactive-ion-etching into SiO2 substrates. Good agreement between experimental and theoretical results for selected radial gratings is reached. Furthermore, the mass production tests using injection molding are carried out with good replicability.

PubMed Commons home

PubMed Commons

How to join PubMed Commons

    Supplemental Content

    Full text links

    Icon for Optical Society of America
    Loading ...
    Write to the Help Desk