Exhibit 31.02

                             CERTIFICATIONS


I, Craig A. Creaturo, certify that:


1. I have reviewed this quarterly report on Form 10-Q of II-VI
Incorporated;

2. Based on my knowledge, this report does not contain any untrue
   statement of a material fact or omit to state a material fact
   necessary to make the statements made, in light of the circumstances
   under which such statements were made, not misleading with respect to
   the period covered by this report;

3. Based on my knowledge, the financial statements, and other financial
   information included in this report, fairly present in all material
   respects the financial condition, results of operations and cash
   flows of the registrant as of, and for, the periods presented in this
   report;

4. The registrant's other certifying officer and I are responsible for
   establishing and maintaining disclosure controls and procedures (as
   defined in Exchange Act Rules 13a-15(e) and 15d-15(e)) for
   the registrant and have:

   a) Designed such disclosure controls and procedures, or caused such
      disclosure controls and procedures to be designed under our
      supervision, to ensure that material information relating to the
      registrant, including its consolidated subsidiaries, is made known
      to us by others within those entities, particularly during the
      period in which this report is being prepared;

   b) [omitted in accordance with SEC Release Nos. 33-8238/34-47986
      and 33-8392/34-49313];

   c) Evaluated the effectiveness of the registrant's disclosure
      controls and procedures and presented in this report our
      conclusions about the effectiveness of the disclosure
      controls and procedures, as of the end of the period covered by
      this report based on such evaluation; and

   d) Disclosed in this report any changes in the registrant's internal
      control over financial reporting that occurred during the
      registrant's most recent fiscal quarter that has materially
      affected, or is reasonably likely to materially affect, the
      registrant's internal control over financial reporting; and

5. The registrant's other certifying officer and I have disclosed, based
   on our most recent evaluation of internal control over financial
   reporting, to the registrant's auditors and the audit committee of
   the registrant's board of directors (or persons performing the
   equivalent functions):

   a) All significant deficiencies and material weaknesses in the
      design or operation of internal control over financial reporting
      which are reasonably likely to adversely affect the registrant's
      ability to record, process, summarize and report financial
      information; and

   b) Any fraud, whether or not material, that involves management or
      other employees who have a significant role in the registrant's
      internal control over financial reporting.


May 12, 2004                          By: /s/ Craig A. Creaturo
                                              Craig A. Creaturo
                                       Chief Accounting Officer
                                               and Treasurer
                                      (principal financial officer)