Integrating spheres are often used as lamp measurement systems. With their easy-to-use measurement principle and their flexibility in size they have been the standard measurement system in lighting technology. Even high power output and physically big sources like fluorescence or discharge lamps can be placed inside big spheres with diameter of 3 meters and more for spectral and photopic flux characterization. Different measurement configurations can be supported depending on the requirements for system accuracy and cost. Therefore we offer a broad range of systems, equipped with different detector units to match your requirements.

The general equipment of an integrating sphere based measurement system is a dedicated integrating sphere coated with optical diffuse reflectance material and precise interior baffling, calibrated light source (2π or 4π) with constant current power supply and calibration certificate, absorption correction lamp  and a detector system, either a spectrometer (different spectrometers available) or photodiodes.

Based on this standard configuration there are several specialized, dedicated light measurement systems such as the ilumia® system. The ilumia®pro system includes an additional tool for cooling and stabilizing the light source sample during the measurement. Furthermore this setup allows measurements of the light source under test at different operating temperatures. The software records luminous or spectral flux over time versus current or temperature. Different long-term studies are implemented as standard measurements in the software settings. Standard sizes for these systems are 20, 40, 65 and 76” integrating spheres.

Through the development of bigger and bigger illumination systems, the demand for big integrating spheres increased as well and integrating spheres of 2-3 m size has become usual. As a sphere of this size can cause problems in terms of space constraints in laboratories there has been a new product development enabling working with half-a-sphere only. The new Half-Moon-Sphere principal uses a hemisphere, coated with highly diffuse reflectance paint and an optical mirror to simulate a full sphere. This principle has been designed to save laboratory space and also simplify mounting of flat emitting devices such as OLED´s and flat displays. An additional advantage is for LED´s working with big cooling devices as those can be kept outside the sphere. Please contact us directly for further information.

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