Patent ID: 8593620

Claim:
A method for measuring a stereoscopic luminescence distribution of a self-luminescent illuminant, comprising: providing a paraboloidal mirror or a paraboloidal screen; placing said illuminant on a specimen platform which positions said illuminant on a focal point of said paraboloidal mirror or said paraboloidal screen; and imaging, as planar imaging data, light rays which are emitted from said illuminant, and are then reflected off said paraboloidal mirror or projected onto said paraboloidal screen, and from thus obtained planar imaging data including the intensity and spectral characteristics of the light rays, as well as the sizes and the number of bright dots when the light rays are represented as discrete bright dots in the imaging data, calculating a stereoscopic luminance distribution of the light rays generated by said illuminant; wherein for each light ray, an area dS of a bright dot projected on a hypothetical spherical surface is computed based on a measured area dS'of a corresponding bright dot contained in said planar imaging data, wherein said planar imaging data is interpreted as a projected location in 2-D space expressed by the polar coordinates (r, φ), and wherein the bright dot projected on the hypothetical spherical surface represents the size and orientation expressed by the polar coordinates (θ,φ) in 3-D space of the corresponding light ray, to quantify the intensity and the spectral characteristic of each light ray by image transformation and spectral analysis.