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    Integrating Sphere (1.5/1.75/2.0/2.5/3.0m )

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    1. Details

    The integrating sphere is a hollow spherical shell.Widely applies in the light, chromaticity and radiant emittance measurement test situation.The interior sphere is painted with non-selective white diffuse reflection layer.The illuminance produced by the light source S at arbitrary point B is superimposed by illuminance of iterative diffuse.According to the theory of integration.We can get the illuminance of B:


    In the equation (1),E1 is the illuminance on B produced by the direct irradiation from S.The value of E1 is determined by the po-sition of both  point B and the light source S.If we place a barrier between B and S,then E1=0,So the luminous of B is:


    In the equation (2) r is the radius of the sphere ,ρis the reflectivity of the intine of  sphere.r andρare invariable data,so the illuminance E of an arbitrary point (eliminating the illuminance of direct irradiation) is in direct proportion to the luminous flux.So we can get the luminous flux Φ of a light source by testing the illuminance E through the window of the sphere wall.

    Application range

    Applicabie for photometric and colorimetric measurement of high-power fluoresent lamps、HID lamps、CFL、GLS、CCFL、EEFL、halogen lamps and FCL lamps etc.


    Φ 1.0/1.5/1.75/2.0/2.5/3.0m