LED/SSL measurements

Lighting: radiant power measurements

Radiant power is the amount of power [light] emitted from a source irrelevant of the direction it is emitted, expressed in Watt [W]. Applied to light sources, it is known as spectral power and defines the total amount of power in Watts emitted for each wavelength in each direction. Admesy offers complete solutions with integrating […]

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Lighting: radiance & irradiance measurements

Radiance measurements are carried out to determine the amount of radiant intensity per unit projected area [W/m²/sr] and are measured using a lens system as optics to target at diffuse surfaces [e.g. OLED or display panels]. Irradiance defines the amount of radiant flux incident on an object’s surface, typically expressed in power per unit of surface [W/m²]. Typically, […]

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Lighting: luminance & illuminance measurements

When analysing light sources one often wants to measure the luminance or illuminance of the source. Luminance is often referred to as brightness and expressed in candela per square meter whereas illuminance is the amount of light from a surface expressed in lux or lumen per square meter. The third covered unit which can be measured is […]

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Lighting measurements

LED and Solid state lighting [SSL] is often referred to as the light of the future: combining low energy consumption, efficient technology and long product life times. An inherent challenge to the production process of LEDs and Solid State Lighting products are driver related  variations in their optical characteristics such as brightness, colour and flicker, […]

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Lighting: flicker measurements

Almost any light source that emits light shows fluctuations in light output. These fluctuations can be caused by mains or power supplies / drivers and differs for each type of light source and type of power supplies. Especially from health and well-being point of view, determination of flicker of light emitting sources becomes more and […]

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