FRANKFURT (dpa-AFX) - The new Chief Executive Officer of Jenoptik is set to assume his duties as early as the beginning of August. Dominic Dorfner will lead the technology group starting August 1, the MDax-listed company announced in Jena on Tuesday. Dorfner was appointed by the Supervisory Board for a three-year term at the end of March. At that time, Jenoptik had indicated that he would take over the chairmanship of the Executive Board by October 1 at the latest./err/stk