In 1814, Guinand left the firm, as did Reichenbach, and Fraunhofer became a partner in the firm, the name being changed to Utzschneider und Fraunhofer.
Leta 1806 sta Utzscheider in von Reichenbach povabila Frauhoferja na svoj inštitut v Benediktbeuern, sukularizirani benediktinski samostan, ki se je ukvarjal z izdelovanjem stekla.