The Color Splitting System for TV Cameras - XYZ Prism

Abstract

One of the dominant aspects, which prejudices the quality of colorimage reproduction, is the first operation in TV chain - scanning. Upto this day, the color splitting system, working in RGB colorimetricsystem, is still entirely used. The existence of negative parts of thecolor matching functions r(l), g(l), b(l) causes complications byoptical separation of partial pictures R, G, B in classic scanningsystem. It leads to distortion of reproduction of color images.However, the specific technical and scientific applications, where thecolor carries the substantial part of information (cosmic development,medicine), demand high fidelity of color reproduction. This articlesubmits the results of the design of the color splitting system workingin XYZ colorimetric system (next only XYZ prism). Shortly the way toobtain theoretical spectral reflectances of partial filters of XYZprism is described. Further, these filters are approximated by realoptical interference filters and the geometry of XYZ prism isestablished. Finally, the results of the colorimetric distortion testof proposed scanning system are stated.