Patent ID: 7650050
Filing Date: 2010-01-19
Classification: B82Y,G01N,G02B

Abstract:
1. An optical sensor device for local analysis of a combustion process in a combustor of a thermal power plant, the sensor comprising: at least one wavelength selective optical element configured and arranged to operate at temperatures up to 1600° C. and to be exposed directly or indirectly to hot combustion gases when produced by said combustion process, said optical element comprising an array of nano- and/or microcrystalline fibers created by shear flow crystallization; a mirror; a detector; a light source configured and arranged to emanate a light beam passing at least once through said at least one optical element and at least partially enters the detector; wherein said at least one optical element comprises at least two optical elements on the same substrate onto which each array of nano- and/or microcrystalline fibers are created by shear flow crystallization while rotating said substrate about an axis or rotation, and said at least two optical elements are positioned on said substrate at different circular sections towards said axis; and wherein said substrate is pivotably arranged about said axis of rotation so that the at least two optical elements are alignable one after the other to said light beam when emanating from said light source.