| 摘要 |
Apparatus and methods are provided for use with solar energy. A substrate is defined by a parabolic cross-sectional shape or portion there of. A surface treatment having plural layers of dichroic materials is formed on the substrate. The layers are tapered in thickness, increasing from about a lower edge to about an upper edge. A spectral band of incident photonic energy is concentrated on a target by way of the surface treatment. The spectral band is consistent for a range of angles of incidence to the surface treatment.
|
