Study on Tolerance Control for Optical Alignment of CPV Modules Using a Monte Carlo Simulation

CPV requires accuracy in optical alignment. It is required to control the assembly tolerance quantitatively. It is convenient to control the tolerance by statistical parameters. A Monte Carlo method was developed to relate how statistical parameters in component and assemble variance affects to the module performance. The rough rule will be the standard deviation of misalignment should be controlled less than 20 % of designed acceptance angle, unless the number of the cells inside the module was not very small (Typically N=4). Namely, if the acceptance angle of the optics is plus or minus 1 degree, then the standard deviation of assembly error should be less than 0.2 deg.