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L. A. Mikheenko, A. I. Gensitskiy
National Technical University of Ukraine «Kyiv Polytechnic Institute», Kyiv, Ukraine
CHOISE FORM FACTOR OF DIFFUSE RADIATOR OF VARIABLE BRIGHTNESS
The paper proposes the uniform light sources which have a form of several or multiple optically connected integrating spheres. The principal advantages of these light sources are high photometric and metrological characteristics. As a result they have good perspectives in optical radiometry and calibration of imaging systems and optical instruments. The principal field of their application is calibration of remote sensing instruments and sensitive megapixel cameras. The light source contains several (3 … 11) primary integrating spheres of small diameters which are installed on a secondary integrating sphere of bigger diameter. The initial light sources – halogen lamps or light emitted diodes are installed inside the primary integrating spheres. These spheres are mounted on the secondary one though diaphragms which diameters can be varied. The secondary integrating sphere has an output aperture where uniform radiance emits. The paper presents the results of theoretical and experimental research of these light sources including the techniques for radiance calculation and the recommendations for light source design.
Keywords: іllumination unit, energetic characteristic, techniques parametrs.
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