EXHIBIT 23.1 INDEPENDENT AUDITORS' CONSENT We consent to the incorporation by reference in Registration Statement Nos. 33-66536, 33-35609, 33-31442, 33-21878 and 2-96838 of Coherent, Inc. on Forms S-8 of our report dated November 2, 1994, appearing in this Annual Report on Form 10-K of Coherent, Inc. for the year ended October 1, 1994. DELOITTE & TOUCHE LLP San Jose, California December 16, 1994