Illuminance detector VL-3701

laboratorycalibration

Illuminance is the most frequently made measurement within general and specialist lighting applications. The two most important qualities required of a high precision illuminance detector are a spectral responsivity that is very well matched to the ideal V(λ) photopic curve and a spatial response that provides cosine correction. The VL-3701 meets the high standards of DIN Class A classification for both these parameters. Photometric detectors offer a convenient solution for measuring illuminance (lux) simply, quickly and over a very wide dynamic range. When suitably calibrated, additional photometric quantities including luminance (cd/m2), luminous flux (lumens), and luminous intensity (cd) can be measured in conjunction with accessories such as lenses, integrating spheres and goniometers. The model VL-3701 is a high quality photometric detector calibrated for the measurement of illuminance and has proven itself over many years in numerous demanding industrial and scientific applications. The detector can be connected to all Gigahertz-Optik measuring devices and transimpedance amplifiers. For the precise measurement of illuminance, the VL-3701 detector is constructed with a 7mm diameter diffuser that provides a cosine corrected field of view (Figure 2) and a photometrically corrected photodiode. The specifications of both meet the high requirements of quality class A of DIN 5032 part 7.