Mirror goniometers are still frequently used, but since the market introduction of the robogonio in 2012, different photometry manufacturers have developed robot solutions. "We have been working with opsira for the past five years," says Iavarone. "The measuring technology is often comparable, but the companies differ. opsira's support is fast and competent and we pursue a reasonable exchange. Besides the good product, this is a huge benefit." For this reason, LED Linear relied on the certification for measurements in accordance with DIN EN 13032-4 being possible with the goniophotometerby opsira, and this trust has paid off.Since then, the company has been profiting from various advantages that are interesting for internal development and external customers. While a mirror goniometer requires a very large, very high room and moves around the luminaire, the robogonio moves the luminaire. "So we only need a long, narrow room at whose end the detector records the measuring values." The consequence: the light distribution curve is measured at a speed that cannot be realised with a mirror goniometer. Valid results are thus available faster and the development process speeds up. "With the rapid developments nowadays, this is a giant advantage," says Iavarone.Another central aspect is a measurement that is designed to remove coffee spots. In combination with a spectral measuring head, luminaires can also be tested in the outmost angle of radiation. "The trend goes towards increasingly smaller luminaire dimensions, which is why it becomes increasingly challenging to achieve a homogeneous light distribution." Measurements of the colour spectrum and temperature allow us to quantify errors and compare these with the target value. "We use a lot of computer simulations in optics development. These become significantly more accurate when fed with precise values," notes Iavarone. "As this will become increasingly important in the future, it is important for us to make sure that our lab is ready for this trend."