Patent ID: 6825982
Filing Date: 2004-11-30
Classification: B82Y,G02B

Abstract:
A strongly refractive one-dimensional prism, made from a photonic crystal, responsive to a light ray from a light source having at least two wavelengths, comprising:a one-dimensional periodic layered dielectric structure formed as an array of two or more parallel layers of homogenous optical material, each parallel layer having a predetermined thickness and having a different dielectric constant from a successive layer, the one-dimensional periodic layered dielectric structure having an external incident surface and an external exit surface, the incident surface and, or the exit surface being non-parallel to the layers of the one-dimensional periodic layered dielectric structure, the light ray entering the incident surface, passing through the one-dimensional periodic layered dielectric structure and exiting the external exit surface; thereby providing a spectrally spread image on a target surface.