The prince decided to give Fraunhofer money and books to study. He studied for five years and one day he was invited to work for a man called Joseph Utzschneider. This man had a company that made glass lenses to be used in scientific instruments. And this company had a secret laboratory in a monastery called Benediktbeuern. In this laboratory people were trying to discover how to make better glass lenses. Glass lenses at that time was a very complicated technology. After three years, Fraunhofer was one of the directors of this company. And after eight years he was a partner of the owner.