| 摘要 |
The light guide apparatus will guide a beam whose rays have a predetermined phase space distribution with a maximum deviation angle theta max in a first plane perpendicular to the beam axis. The guiding apparatus includes an optical system positioned at a distance l/2 from the first plane for receiving light from the edge of the spreading beam along an edge of width l tan theta max and for diverting the light towards the beam axis to reproduce the predetermined spatial distribution in a second plane perpendicular to the beam axis at a distance l from the first plane. The optical system can be made from annular or cylindrical, regular or fresnel lenses. A number of systems may be sequentially mounted to guide a beam along any desired distance with in a straight line or perpendicular to its original direction. |
