Development and improvement of a photonics instrument for light scattering metrology

Future cars enable more use of interior lighting with special visual effects. In order to optimize visual effects, the light scattering behavior of these materials must be precisely characterized. We present the development of a photonic instrument for light scattering measurements in terms of BSDF (bi-directional scattering distribution function). The instrument is principally a goniophotometer. We designed and built a fully automated BSDF measurement device including data processing optimized for low light signals including evaluations and justifications. Due to these optimizations, the photonic device has currently an accuracy of less than 0.08 % (2 sigma standard deviation). In addition, the dynamic range is currently about 10 decades. We will implement further optimization steps soon.