Exhibit 23.01
Consent of Independent Registered Public Accounting Firm
We consent to the incorporation by reference in the following Registration Statements:
| 1. | Registration Statement (Form S-4 No. 333-229052) of II-VI Incorporated; |
| 2. | Registration Statement (Form S-8 No. 333-12737) pertaining to the II-VI Incorporated Deferred Compensation Plan, |
| 3. | Registration Statement (Form S-8 No. 333-129675) pertaining to the II-VI Incorporated 2005 Omnibus Incentive Plan, |
| 4. | Registration Statement (Form S-8 No. 333-164827) pertaining to the II-VI Incorporated 2009 Omnibus Incentive Plan, |
| 5. | Registration Statement (Form S-8 No. 333-184805) pertaining to the II-VI Incorporated 2012 Omnibus Incentive Plan, |
| 6. | Registration Statement (Form S-8 No. 333-199855) pertaining to the Amended and Restated II-VI Incorporated 2012 Omnibus Incentive Plan, |
| 7. | Registration Statement (Form S-8 No. 333-228367) pertaining to the II-VI Incorporated 2018 Employee Stock Purchase Plan, and |
| 8. | Registration Statement (Form S-8 No. 333-228368) pertaining to the II-VI Incorporated 2018 Omnibus Incentive Plan; |
of our reports dated August 16, 2019, with respect to the consolidated financial statements and schedule of II-VI Incorporated and Subsidiaries and the effectiveness of internal control over financial reporting of II-VI Incorporated and Subsidiaries included in this Annual Report (Form 10-K) of II-VI Incorporated and Subsidiaries for the year ended June 30, 2019.
/s/ Ernst & Young LLP
Pittsburgh, Pennsylvania
August 16, 2019