The Glasgow Lens Design Problem is ofcurrent interest in a special field of optics: Microlithography. This field is accompanied by high economic interests. Companies often do not allow their employees to publish their work. And the problem perhaps was too special: a lens consisting only ofinirrors was asked. This reasons (and probably additional ones) led to the situation, that only 6 solutions were received. Nevertheless, this few solutions show the range ofpossibilities given by this statement of the problem.