Janoch Engineering is an engineering services company. The company has expertise in opto-mechanical design, laser applications, and photovoltaics manufacturing. Janoch Engineering is currently applying a light- or laser-beam induced current (LBIC) technology to measure problematic defects and performance variations in solar PV cells and modules. By obtaining detailed images of the optoelectronic performance of PV devices, the technique locates defects and measures diffusion length, shunt resistance, surface recombination, and other properties. By analyzing multiple measures of process variability in real time, the tool will increase reduce manufacturing costs and increase module efficiency.