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  <xs:element id="iivi_PriorCreditFacilityMember" abstract="true" name="PriorCreditFacilityMember" nillable="true" xbrli:periodType="duration" substitutionGroup="xbrli:item" type="dtr-types:domainItemType"/>
  <xs:element id="iivi_OtherCountryMember" abstract="true" name="OtherCountryMember" nillable="true" xbrli:periodType="duration" substitutionGroup="xbrli:item" type="dtr-types:domainItemType"/>
  <xs:element id="iivi_DeferredTaxAssetRightOfUseAsset" abstract="false" name="DeferredTaxAssetRightOfUseAsset" nillable="true" xbrli:periodType="instant" xbrli:balance="debit" substitutionGroup="xbrli:item" type="xbrli:monetaryItemType"/>
  <xs:element id="iivi_PerformanceShareGrantPeriod" abstract="false" name="PerformanceShareGrantPeriod" nillable="true" xbrli:periodType="duration" substitutionGroup="xbrli:item" type="xbrli:durationItemType"/>
  <xs:element id="iivi_ShareBasedCompensationSharesAuthorizedUnderStockOptionAndStockAppreciationRightPlansExercisePriceRangeUpperRangeLimit" abstract="false" name="ShareBasedCompensationSharesAuthorizedUnderStockOptionAndStockAppreciationRightPlansExercisePriceRangeUpperRangeLimit" nillable="true" xbrli:periodType="duration" substitutionGroup="xbrli:item" type="dtr-types:perShareItemType"/>
  <xs:element id="iivi_EffectiveIncomeTaxRateReconciliationIncreaseDecreaseAmountAbstract" abstract="true" name="EffectiveIncomeTaxRateReconciliationIncreaseDecreaseAmountAbstract" nillable="true" xbrli:periodType="duration" substitutionGroup="xbrli:item" type="xbrli:stringItemType"/>
  <xs:element id="iivi_FinanceLeaseCostsAbstract" abstract="true" name="FinanceLeaseCostsAbstract" nillable="true" xbrli:periodType="duration" substitutionGroup="xbrli:item" type="xbrli:stringItemType"/>
  <xs:element id="iivi_LesseeOperatingAndFinanceLeaseLiabilityPaymentsDueYearTwo" abstract="false" name="LesseeOperatingAndFinanceLeaseLiabilityPaymentsDueYearTwo" nillable="true" xbrli:periodType="instant" xbrli:balance="credit" substitutionGroup="xbrli:item" type="xbrli:monetaryItemType"/>
  <xs:element id="iivi_FirstRangeMember" abstract="true" name="FirstRangeMember" nillable="true" xbrli:periodType="duration" substitutionGroup="xbrli:item" type="dtr-types:domainItemType"/>
  <xs:element id="iivi_OmnibusEquityIncentivePlanMember" abstract="true" name="OmnibusEquityIncentivePlanMember" nillable="true" xbrli:periodType="duration" substitutionGroup="xbrli:item" type="dtr-types:domainItemType"/>
  <xs:element id="iivi_CreditFacilitiesOutstandingAmountsBecomeDueAndPayablePriorToMaturityOfSeniorNotesPeriod" abstract="false" name="CreditFacilitiesOutstandingAmountsBecomeDueAndPayablePriorToMaturityOfSeniorNotesPeriod" nillable="true" xbrli:periodType="duration" substitutionGroup="xbrli:item" type="xbrli:durationItemType"/>
  <xs:element id="iivi_AuditInformationAbstract" abstract="true" name="AuditInformationAbstract" nillable="true" xbrli:periodType="duration" substitutionGroup="xbrli:item" type="xbrli:stringItemType"/>
  <xs:element id="iivi_NewSeniorCreditFacilitiesMember" abstract="true" name="NewSeniorCreditFacilitiesMember" nillable="true" xbrli:periodType="duration" substitutionGroup="xbrli:item" type="dtr-types:domainItemType"/>
  <xs:element id="iivi_SeriesAMandatoryConvertiblePreferredStockMember" abstract="true" name="SeriesAMandatoryConvertiblePreferredStockMember" nillable="true" xbrli:periodType="duration" substitutionGroup="xbrli:item" type="dtr-types:domainItemType"/>
  <xs:element id="iivi_SharebasedCompensationSharesAuthorizedUnderStockOptionPlansAndStockAppreciationRightsExercisePriceRangeOutstandingSharesWeightedAverageRemainingContractualTerm" abstract="false" name="SharebasedCompensationSharesAuthorizedUnderStockOptionPlansAndStockAppreciationRightsExercisePriceRangeOutstandingSharesWeightedAverageRemainingContractualTerm" nillable="true" xbrli:periodType="duration" substitutionGroup="xbrli:item" type="xbrli:durationItemType"/>
  <xs:element id="iivi_FirstFourFiscalQuartersAfterClosingDateMember" abstract="true" name="FirstFourFiscalQuartersAfterClosingDateMember" nillable="true" xbrli:periodType="duration" substitutionGroup="xbrli:item" type="dtr-types:domainItemType"/>
  <xs:element id="iivi_CustomerSemiconductorMember" abstract="true" name="CustomerSemiconductorMember" nillable="true" xbrli:periodType="duration" substitutionGroup="xbrli:item" type="dtr-types:domainItemType"/>
  <xs:element id="iivi_ConvertiblePreferredStockRightToConvertNumberOfSharesOfCommonStock" abstract="false" name="ConvertiblePreferredStockRightToConvertNumberOfSharesOfCommonStock" nillable="true" xbrli:periodType="instant" substitutionGroup="xbrli:item" type="xbrli:sharesItemType"/>
  <xs:element id="iivi_A500SeniorNotesDueDecember2029Member" abstract="true" name="A500SeniorNotesDueDecember2029Member" nillable="true" xbrli:periodType="duration" substitutionGroup="xbrli:item" type="dtr-types:domainItemType"/>
  <xs:element id="iivi_TechnologyAndPatentsMember" abstract="true" name="TechnologyAndPatentsMember" nillable="true" xbrli:periodType="duration" substitutionGroup="xbrli:item" type="dtr-types:domainItemType"/>
  <xs:element id="iivi_BankOfAmericaNAMember" abstract="true" name="BankOfAmericaNAMember" nillable="true" xbrli:periodType="duration" substitutionGroup="xbrli:item" type="dtr-types:domainItemType"/>
  <xs:element id="iivi_GoodwillAndOtherIntangibleAssetsTable" abstract="true" name="GoodwillAndOtherIntangibleAssetsTable" nillable="true" xbrli:periodType="duration" substitutionGroup="xbrldt:hypercubeItem" type="xbrli:stringItemType"/>
  <xs:element id="iivi_StockOptionAndStockAppreciationRightsMember" abstract="true" name="StockOptionAndStockAppreciationRightsMember" nillable="true" xbrli:periodType="duration" substitutionGroup="xbrli:item" type="dtr-types:domainItemType"/>
  <xs:element id="iivi_AssuranceTypeLimitedProductWarrantyPeriod" abstract="false" name="AssuranceTypeLimitedProductWarrantyPeriod" nillable="true" xbrli:periodType="duration" substitutionGroup="xbrli:item" type="xbrli:durationItemType"/>
  <xs:element id="iivi_SeriesBRedeemableConvertiblePreferredStockMember" abstract="true" name="SeriesBRedeemableConvertiblePreferredStockMember" nillable="true" xbrli:periodType="duration" substitutionGroup="xbrli:item" type="dtr-types:domainItemType"/>
  <xs:element id="iivi_WithholdingTaxAssociatedWithPreviouslyTaxedEarnings" abstract="false" name="WithholdingTaxAssociatedWithPreviouslyTaxedEarnings" nillable="true" xbrli:periodType="duration" xbrli:balance="debit" substitutionGroup="xbrli:item" type="xbrli:monetaryItemType"/>
  <xs:element id="iivi_PreferredStockDefaultOnPaymentObligationDividendRateQuarterlyIncreasePercentage" abstract="false" name="PreferredStockDefaultOnPaymentObligationDividendRateQuarterlyIncreasePercentage" nillable="true" xbrli:periodType="duration" substitutionGroup="xbrli:item" type="dtr-types:percentItemType"/>
  <xs:element id="iivi_LesseeOperatingAndFinanceLeaseLiabilityPaymentsDueYearOne" abstract="false" name="LesseeOperatingAndFinanceLeaseLiabilityPaymentsDueYearOne" nillable="true" xbrli:periodType="instant" xbrli:balance="credit" substitutionGroup="xbrli:item" type="xbrli:monetaryItemType"/>
  <xs:element id="iivi_BusinessCombinationConsiderationTransferredCashPaidPerAcquireeShare" abstract="false" name="BusinessCombinationConsiderationTransferredCashPaidPerAcquireeShare" nillable="true" xbrli:periodType="duration" substitutionGroup="xbrli:item" type="dtr-types:perShareItemType"/>
  <xs:element id="iivi_AssetsObtainedInExchangeForLeaseLiabilitiesAbstract" abstract="true" name="AssetsObtainedInExchangeForLeaseLiabilitiesAbstract" nillable="true" xbrli:periodType="duration" substitutionGroup="xbrli:item" type="xbrli:stringItemType"/>
  <xs:element id="iivi_SwingLoanSubFacilityMaximumInitialBorrowingCapacity" abstract="false" name="SwingLoanSubFacilityMaximumInitialBorrowingCapacity" nillable="true" xbrli:periodType="instant" xbrli:balance="credit" substitutionGroup="xbrli:item" type="xbrli:monetaryItemType"/>
  <xs:element id="iivi_PhotonicSolutionsMember" abstract="true" name="PhotonicSolutionsMember" nillable="true" xbrli:periodType="duration" substitutionGroup="xbrli:item" type="dtr-types:domainItemType"/>
  <xs:element id="iivi_TermALoanFacilityAndRevolvingCreditFacilityMember" abstract="true" name="TermALoanFacilityAndRevolvingCreditFacilityMember" nillable="true" xbrli:periodType="duration" substitutionGroup="xbrli:item" type="dtr-types:domainItemType"/>
  <xs:element id="iivi_ShareBasedCompensationArrangementByShareBasedPaymentAwardEquityInstrumentsOtherThanOptionsOutstandingNumber" abstract="false" name="ShareBasedCompensationArrangementByShareBasedPaymentAwardEquityInstrumentsOtherThanOptionsOutstandingNumber" nillable="true" xbrli:periodType="instant" substitutionGroup="xbrli:item" type="xbrli:sharesItemType"/>
  <xs:element id="iivi_CommonStockVolumeWeightedAveragePricePercentageGreaterThanApplicableConversionPrice" abstract="false" name="CommonStockVolumeWeightedAveragePricePercentageGreaterThanApplicableConversionPrice" nillable="true" xbrli:periodType="duration" substitutionGroup="xbrli:item" type="dtr-types:percentItemType"/>
  <xs:element id="iivi_MandatoryConvertiblePreferredStockHolderDateAfterEffectiveDateOfChange" abstract="false" name="MandatoryConvertiblePreferredStockHolderDateAfterEffectiveDateOfChange" nillable="true" xbrli:periodType="duration" substitutionGroup="xbrli:item" type="xbrli:integerItemType"/>
  <xs:element id="iivi_DeferredTaxLiabilitiesTaxOnUnremittedEarnings" abstract="false" name="DeferredTaxLiabilitiesTaxOnUnremittedEarnings" nillable="true" xbrli:periodType="instant" xbrli:balance="credit" substitutionGroup="xbrli:item" type="xbrli:monetaryItemType"/>
  <xs:element id="iivi_ContributionsToProfitSharingRetirementPlan" abstract="false" name="ContributionsToProfitSharingRetirementPlan" nillable="true" xbrli:periodType="duration" xbrli:balance="debit" substitutionGroup="xbrli:item" type="xbrli:monetaryItemType"/>
  <xs:element id="iivi_ShareBasedCompensationArrangementByShareBasedPaymentAwardEquityInstrumentsOtherThanOptionsWeightedAverageExercisePriceRollForward" abstract="true" name="ShareBasedCompensationArrangementByShareBasedPaymentAwardEquityInstrumentsOtherThanOptionsWeightedAverageExercisePriceRollForward" nillable="true" xbrli:periodType="duration" substitutionGroup="xbrli:item" type="xbrli:stringItemType"/>
  <xs:element id="iivi_DeferredTaxLiabilityLeasingArrangements" abstract="false" name="DeferredTaxLiabilityLeasingArrangements" nillable="true" xbrli:periodType="instant" xbrli:balance="credit" substitutionGroup="xbrli:item" type="xbrli:monetaryItemType"/>
  <xs:element id="iivi_LesseeOperatingAndFinanceLeaseLiabilityPaymentsDueYearFive" abstract="false" name="LesseeOperatingAndFinanceLeaseLiabilityPaymentsDueYearFive" nillable="true" xbrli:periodType="instant" xbrli:balance="credit" substitutionGroup="xbrli:item" type="xbrli:monetaryItemType"/>
  <xs:element id="iivi_ShareBasedCompensationArrangementByShareBasedPaymentAwardOtherThanOptionsOutstandingWeightedAverageExercisePrice" abstract="false" name="ShareBasedCompensationArrangementByShareBasedPaymentAwardOtherThanOptionsOutstandingWeightedAverageExercisePrice" nillable="true" xbrli:periodType="instant" substitutionGroup="xbrli:item" type="dtr-types:perShareItemType"/>
  <xs:element id="iivi_EffectiveIncomeTaxRateReconciliationGILTIAndFDIIAmount" abstract="false" name="EffectiveIncomeTaxRateReconciliationGILTIAndFDIIAmount" nillable="true" xbrli:periodType="duration" xbrli:balance="debit" substitutionGroup="xbrli:item" type="xbrli:monetaryItemType"/>
  <xs:element id="iivi_PaymentToSettleConversionOfDebtAndRepurchaseOfNotes" abstract="false" name="PaymentToSettleConversionOfDebtAndRepurchaseOfNotes" nillable="true" xbrli:periodType="duration" xbrli:balance="credit" substitutionGroup="xbrli:item" type="xbrli:monetaryItemType"/>
  <xs:element id="iivi_FinanceLeaseCost" abstract="false" name="FinanceLeaseCost" nillable="true" xbrli:periodType="duration" xbrli:balance="debit" substitutionGroup="xbrli:item" type="xbrli:monetaryItemType"/>
  <xs:element id="iivi_CustomerOtherMember" abstract="true" name="CustomerOtherMember" nillable="true" xbrli:periodType="duration" substitutionGroup="xbrli:item" type="dtr-types:domainItemType"/>
  <xs:element id="iivi_FourthRangeMember" abstract="true" name="FourthRangeMember" nillable="true" xbrli:periodType="duration" substitutionGroup="xbrli:item" type="dtr-types:domainItemType"/>
  <xs:element id="iivi_LesseeOperatingAndFinanceLeaseLiabilityUndiscountedExcessAmount" abstract="false" name="LesseeOperatingAndFinanceLeaseLiabilityUndiscountedExcessAmount" nillable="true" xbrli:periodType="instant" xbrli:balance="credit" substitutionGroup="xbrli:item" type="xbrli:monetaryItemType"/>
  <xs:element id="iivi_SubsequentFiscalQuarterMember" abstract="true" name="SubsequentFiscalQuarterMember" nillable="true" xbrli:periodType="duration" substitutionGroup="xbrli:item" type="dtr-types:domainItemType"/>
  <xs:element id="iivi_AmendedAndRestatedCommitmentLetterMember" abstract="true" name="AmendedAndRestatedCommitmentLetterMember" nillable="true" xbrli:periodType="duration" substitutionGroup="xbrli:item" type="dtr-types:domainItemType"/>
  <xs:element id="iivi_SwissPlanMember" abstract="true" name="SwissPlanMember" nillable="true" xbrli:periodType="duration" substitutionGroup="xbrli:item" type="dtr-types:domainItemType"/>
  <xs:element id="iivi_TemporaryEquityRedemptionValue" abstract="false" name="TemporaryEquityRedemptionValue" nillable="true" xbrli:periodType="instant" xbrli:balance="credit" substitutionGroup="xbrli:item" type="xbrli:monetaryItemType"/>
  <xs:element id="iivi_PerformanceShareUnitsMember" abstract="true" name="PerformanceShareUnitsMember" nillable="true" xbrli:periodType="duration" substitutionGroup="xbrli:item" type="dtr-types:domainItemType"/>
  <xs:element id="iivi_ZeroPointTwoFivePercentConvertibleSeniorNotesDueTwoThousandTwentyTwoMember" abstract="true" name="ZeroPointTwoFivePercentConvertibleSeniorNotesDueTwoThousandTwentyTwoMember" nillable="true" xbrli:periodType="duration" substitutionGroup="xbrli:item" type="dtr-types:domainItemType"/>
  <xs:element id="iivi_IncomeTaxExaminationPenaltiesAndInterestExpenseBenefit" abstract="false" name="IncomeTaxExaminationPenaltiesAndInterestExpenseBenefit" nillable="true" xbrli:periodType="duration" xbrli:balance="debit" substitutionGroup="xbrli:item" type="xbrli:monetaryItemType"/>
  <xs:element id="iivi_SeriesB1ConvertiblePreferredStockMember" abstract="true" name="SeriesB1ConvertiblePreferredStockMember" nillable="true" xbrli:periodType="duration" substitutionGroup="xbrli:item" type="dtr-types:domainItemType"/>
  <xs:element id="iivi_InterestExpenseDisclosureTableTextBlock" abstract="false" name="InterestExpenseDisclosureTableTextBlock" nillable="true" xbrli:periodType="duration" substitutionGroup="xbrli:item" type="dtr-types:textBlockItemType"/>
  <xs:element id="iivi_ShareBasedCompensationArrangementByShareBasedPaymentAwardEquityInstrumentsOtherThanOptionsExercisesInPeriod" abstract="false" name="ShareBasedCompensationArrangementByShareBasedPaymentAwardEquityInstrumentsOtherThanOptionsExercisesInPeriod" nillable="true" xbrli:periodType="duration" substitutionGroup="xbrli:item" type="xbrli:sharesItemType"/>
  <xs:element id="iivi_IndustrialCustomerMember" abstract="true" name="IndustrialCustomerMember" nillable="true" xbrli:periodType="duration" substitutionGroup="xbrli:item" type="dtr-types:domainItemType"/>
  <xs:element id="iivi_ShareBasedCompensationSharesAuthorizedUnderStockOptionAndStockAppreciationRightPlansExercisePriceRangeNumberOfOutstandingOptionsAndStockAppreciationRight" abstract="false" name="ShareBasedCompensationSharesAuthorizedUnderStockOptionAndStockAppreciationRightPlansExercisePriceRangeNumberOfOutstandingOptionsAndStockAppreciationRight" nillable="true" xbrli:periodType="instant" substitutionGroup="xbrli:item" type="xbrli:sharesItemType"/>
  <xs:element id="iivi_FinisarCorporationMember" abstract="true" name="FinisarCorporationMember" nillable="true" xbrli:periodType="duration" substitutionGroup="xbrli:item" type="dtr-types:domainItemType"/>
  <xs:element id="iivi_TermALoanFacilityMember" abstract="true" name="TermALoanFacilityMember" nillable="true" xbrli:periodType="duration" substitutionGroup="xbrli:item" type="dtr-types:domainItemType"/>
  <xs:element id="iivi_TaxCeditCarryforwardsAbstract" abstract="true" name="TaxCeditCarryforwardsAbstract" nillable="true" xbrli:periodType="duration" substitutionGroup="xbrli:item" type="xbrli:stringItemType"/>
  <xs:element id="iivi_RightOfUseAssetAcquisitionExchangedForOperatingLeaseLiability" abstract="false" name="RightOfUseAssetAcquisitionExchangedForOperatingLeaseLiability" nillable="true" xbrli:periodType="duration" xbrli:balance="debit" substitutionGroup="xbrli:item" type="xbrli:monetaryItemType"/>
  <xs:element id="iivi_CommonStockUponPreferredStockConversionMeasurementInput" abstract="false" name="CommonStockUponPreferredStockConversionMeasurementInput" nillable="true" xbrli:periodType="instant" substitutionGroup="xbrli:item" type="xbrli:decimalItemType"/>
  <xs:element id="iivi_PreferredStockAccretionOfRedemptionValuePeriod" abstract="false" name="PreferredStockAccretionOfRedemptionValuePeriod" nillable="true" xbrli:periodType="duration" substitutionGroup="xbrli:item" type="xbrli:durationItemType"/>
  <xs:element id="iivi_IIVIConvertibleNotesMember" abstract="true" name="IIVIConvertibleNotesMember" nillable="true" xbrli:periodType="duration" substitutionGroup="xbrli:item" type="dtr-types:domainItemType"/>
  <xs:element id="iivi_ShareBasedCompensationArrangementByShareBasedPaymentAwardEquityInstrumentsOtherThanOptionsGrantInPeriodFairValue" abstract="false" name="ShareBasedCompensationArrangementByShareBasedPaymentAwardEquityInstrumentsOtherThanOptionsGrantInPeriodFairValue" nillable="true" xbrli:periodType="duration" xbrli:balance="debit" substitutionGroup="xbrli:item" type="xbrli:monetaryItemType"/>
  <xs:element id="iivi_CoherentIncMember" abstract="true" name="CoherentIncMember" nillable="true" xbrli:periodType="duration" substitutionGroup="xbrli:item" type="dtr-types:domainItemType"/>
  <xs:element id="iivi_NewTermLoanBCreditFacilityMember" abstract="true" name="NewTermLoanBCreditFacilityMember" nillable="true" xbrli:periodType="duration" substitutionGroup="xbrli:item" type="dtr-types:domainItemType"/>
  <xs:element id="iivi_NumberOfCustomerEndMarkets" abstract="false" name="NumberOfCustomerEndMarkets" nillable="true" xbrli:periodType="duration" substitutionGroup="xbrli:item" type="xbrli:integerItemType"/>
  <xs:element id="iivi_ShareBasedCompensationSharesIssuedPercentageOfTargetAwardBasedOnActualResults" abstract="false" name="ShareBasedCompensationSharesIssuedPercentageOfTargetAwardBasedOnActualResults" nillable="true" xbrli:periodType="duration" substitutionGroup="xbrli:item" type="dtr-types:percentItemType"/>
  <xs:element id="iivi_ThirdRangeMember" abstract="true" name="ThirdRangeMember" nillable="true" xbrli:periodType="duration" substitutionGroup="xbrli:item" type="dtr-types:domainItemType"/>
  <xs:element id="iivi_NewTermLoanACreditFacilityMember" abstract="true" name="NewTermLoanACreditFacilityMember" nillable="true" xbrli:periodType="duration" substitutionGroup="xbrli:item" type="dtr-types:domainItemType"/>
  <xs:element id="iivi_InterSegmentRevenues" abstract="false" name="InterSegmentRevenues" nillable="true" xbrli:periodType="duration" xbrli:balance="credit" substitutionGroup="xbrli:item" type="xbrli:monetaryItemType"/>
  <xs:element id="iivi_EffectiveIncomeTaxRateReconciliationDeductionsAndCredits" abstract="false" name="EffectiveIncomeTaxRateReconciliationDeductionsAndCredits" nillable="true" xbrli:periodType="duration" substitutionGroup="xbrli:item" type="dtr-types:percentItemType"/>
  <xs:element id="iivi_CommunicationsCustomerMember" abstract="true" name="CommunicationsCustomerMember" nillable="true" xbrli:periodType="duration" substitutionGroup="xbrli:item" type="dtr-types:domainItemType"/>
  <xs:element id="iivi_OperatingAndFinanceLeaseLiabilityPaymentDueAbstract" abstract="true" name="OperatingAndFinanceLeaseLiabilityPaymentDueAbstract" nillable="true" xbrli:periodType="duration" substitutionGroup="xbrli:item" type="xbrli:stringItemType"/>
  <xs:element id="iivi_ShareBasedCompensationSharesAuthorizedUnderStockOptionPlansStockAppreciationAndStockUnitsExercisePriceRangeExercisableOptionsWeightedAverageExercisePrice" abstract="false" name="ShareBasedCompensationSharesAuthorizedUnderStockOptionPlansStockAppreciationAndStockUnitsExercisePriceRangeExercisableOptionsWeightedAverageExercisePrice" nillable="true" xbrli:periodType="duration" substitutionGroup="xbrli:item" type="dtr-types:perShareItemType"/>
  <xs:element id="iivi_DebtInstrumentConvertibleMeasurementPeriodPercentage" abstract="false" name="DebtInstrumentConvertibleMeasurementPeriodPercentage" nillable="true" xbrli:periodType="duration" substitutionGroup="xbrli:item" type="dtr-types:percentItemType"/>
  <xs:element id="iivi_ShareBasedCompensationArrangementByShareBasedPaymentAwardEquityInstrumentsOtherThanOptionsExercisableWeightedAverageExercisePrice" abstract="false" name="ShareBasedCompensationArrangementByShareBasedPaymentAwardEquityInstrumentsOtherThanOptionsExercisableWeightedAverageExercisePrice" nillable="true" xbrli:periodType="instant" substitutionGroup="xbrli:item" type="dtr-types:perShareItemType"/>
  <xs:element id="iivi_BuildingImprovementsAndLandImprovementsMember" abstract="true" name="BuildingImprovementsAndLandImprovementsMember" nillable="true" xbrli:periodType="duration" substitutionGroup="xbrli:item" type="dtr-types:domainItemType"/>
  <xs:element id="iivi_InterestCoverageRatio" abstract="false" name="InterestCoverageRatio" nillable="true" xbrli:periodType="duration" substitutionGroup="xbrli:item" type="xbrli:pureItemType"/>
  <xs:element id="iivi_LesseeOperatingAndFinanceLeaseLiabilityPaymentsDueYearThree" abstract="false" name="LesseeOperatingAndFinanceLeaseLiabilityPaymentsDueYearThree" nillable="true" xbrli:periodType="instant" xbrli:balance="credit" substitutionGroup="xbrli:item" type="xbrli:monetaryItemType"/>
  <xs:element id="iivi_DeferredTaxLiabilitiesAccumulatedDepreciation" abstract="false" name="DeferredTaxLiabilitiesAccumulatedDepreciation" nillable="true" xbrli:periodType="instant" xbrli:balance="credit" substitutionGroup="xbrli:item" type="xbrli:monetaryItemType"/>
  <xs:element id="iivi_EffectiveIncomeTaxRateReconciliationIncreaseDecreasePercentAbstract" abstract="true" name="EffectiveIncomeTaxRateReconciliationIncreaseDecreasePercentAbstract" nillable="true" xbrli:periodType="duration" substitutionGroup="xbrli:item" type="xbrli:stringItemType"/>
  <xs:element id="iivi_EffectOfIncomeTaxHolidayOnEarningsPerShareDiluted" abstract="false" name="EffectOfIncomeTaxHolidayOnEarningsPerShareDiluted" nillable="true" xbrli:periodType="duration" substitutionGroup="xbrli:item" type="dtr-types:perShareItemType"/>
  <xs:element id="iivi_TaxCreditCarryForwardsIndefiniteAmount" abstract="false" name="TaxCreditCarryForwardsIndefiniteAmount" nillable="true" xbrli:periodType="instant" xbrli:balance="debit" substitutionGroup="xbrli:item" type="xbrli:monetaryItemType"/>
  <xs:element id="iivi_ShareBasedCompensationArrangementByShareBasedPaymentAwardOtherThanOptionsExercisedInPeriodWeightedAverageExercisePrice" abstract="false" name="ShareBasedCompensationArrangementByShareBasedPaymentAwardOtherThanOptionsExercisedInPeriodWeightedAverageExercisePrice" nillable="true" xbrli:periodType="duration" substitutionGroup="xbrli:item" type="dtr-types:perShareItemType"/>
  <xs:element id="iivi_IncomeTaxReconciliationDeductionsAndCredits" abstract="false" name="IncomeTaxReconciliationDeductionsAndCredits" nillable="true" xbrli:periodType="duration" xbrli:balance="credit" substitutionGroup="xbrli:item" type="xbrli:monetaryItemType"/>
  <xs:element id="iivi_SignificantAccountingPoliciesLineItems" abstract="true" name="SignificantAccountingPoliciesLineItems" nillable="true" xbrli:periodType="duration" substitutionGroup="xbrli:item" type="xbrli:stringItemType"/>
  <xs:element id="iivi_ShareBasedCompensationArrangementByShareBasedPaymentAwardOtherThanOptionsForfeituresAndExpirationsInPeriodWeightedAverageExercisePrice" abstract="false" name="ShareBasedCompensationArrangementByShareBasedPaymentAwardOtherThanOptionsForfeituresAndExpirationsInPeriodWeightedAverageExercisePrice" nillable="true" xbrli:periodType="duration" substitutionGroup="xbrli:item" type="dtr-types:perShareItemType"/>
  <xs:element id="iivi_WeightedAverageRemainingLeaseTermAbstract" abstract="true" name="WeightedAverageRemainingLeaseTermAbstract" nillable="true" xbrli:periodType="duration" substitutionGroup="xbrli:item" type="xbrli:stringItemType"/>
  <xs:element id="iivi_ConsumerMember" abstract="true" name="ConsumerMember" nillable="true" xbrli:periodType="duration" substitutionGroup="xbrli:item" type="dtr-types:domainItemType"/>
  <xs:element id="iivi_OtherCostAndExpenseAccrualCurrent" abstract="false" name="OtherCostAndExpenseAccrualCurrent" nillable="true" xbrli:periodType="instant" xbrli:balance="credit" substitutionGroup="xbrli:item" type="xbrli:monetaryItemType"/>
  <xs:element id="iivi_ZeroPointFiveZeroFinisarConvertibleNotesMember" abstract="true" name="ZeroPointFiveZeroFinisarConvertibleNotesMember" nillable="true" xbrli:periodType="duration" substitutionGroup="xbrli:item" type="dtr-types:domainItemType"/>
  <xs:element id="iivi_NumberOfCustomersCompanyEnteredIntoCommercialAgreement" abstract="false" name="NumberOfCustomersCompanyEnteredIntoCommercialAgreement" nillable="true" xbrli:periodType="instant" substitutionGroup="xbrli:item" type="xbrli:integerItemType"/>
  <xs:element id="iivi_OperatingLossCarryforwardsAbstract" abstract="true" name="OperatingLossCarryforwardsAbstract" nillable="true" xbrli:periodType="duration" substitutionGroup="xbrli:item" type="xbrli:stringItemType"/>
  <xs:element id="iivi_ConvertiblePreferredStockDefaultOnPaymentObligationCurePeriod" abstract="false" name="ConvertiblePreferredStockDefaultOnPaymentObligationCurePeriod" nillable="true" xbrli:periodType="duration" substitutionGroup="xbrli:item" type="xbrli:durationItemType"/>
  <xs:element id="iivi_TermAFacilityAndRevolvingCreditFacilityMember" abstract="true" name="TermAFacilityAndRevolvingCreditFacilityMember" nillable="true" xbrli:periodType="duration" substitutionGroup="xbrli:item" type="dtr-types:domainItemType"/>
  <xs:element id="iivi_PerformanceStockAndPerformanceStockUnitMember" abstract="true" name="PerformanceStockAndPerformanceStockUnitMember" nillable="true" xbrli:periodType="duration" substitutionGroup="xbrli:item" type="dtr-types:domainItemType"/>
  <xs:element id="iivi_WeightedAverageDiscountRateAbstract" abstract="true" name="WeightedAverageDiscountRateAbstract" nillable="true" xbrli:periodType="duration" substitutionGroup="xbrli:item" type="xbrli:stringItemType"/>
  <xs:element id="iivi_LeverageRatio" abstract="false" name="LeverageRatio" nillable="true" xbrli:periodType="duration" substitutionGroup="xbrli:item" type="xbrli:pureItemType"/>
  <xs:element id="iivi_PurchaseObligationToBePaidAfterYearOne" abstract="false" name="PurchaseObligationToBePaidAfterYearOne" nillable="true" xbrli:periodType="instant" xbrli:balance="credit" substitutionGroup="xbrli:item" type="xbrli:monetaryItemType"/>
  <xs:element id="iivi_CompoundSemiconductorsMember" abstract="true" name="CompoundSemiconductorsMember" nillable="true" xbrli:periodType="duration" substitutionGroup="xbrli:item" type="dtr-types:domainItemType"/>
  <xs:element id="iivi_ShareholdersEquityExcludingTreasuryStock" abstract="false" name="ShareholdersEquityExcludingTreasuryStock" nillable="true" xbrli:periodType="instant" xbrli:balance="credit" substitutionGroup="xbrli:item" type="xbrli:monetaryItemType"/>
  <xs:element id="iivi_SecondRangeMember" abstract="true" name="SecondRangeMember" nillable="true" xbrli:periodType="duration" substitutionGroup="xbrli:item" type="dtr-types:domainItemType"/>
  <xs:element id="iivi_EffectiveIncomeTaxRateReconciliationGILTIAndFDIIPercent" abstract="false" name="EffectiveIncomeTaxRateReconciliationGILTIAndFDIIPercent" nillable="true" xbrli:periodType="duration" substitutionGroup="xbrli:item" type="dtr-types:percentItemType"/>
  <xs:element id="iivi_ShareBasedCompensationArrangementByShareBasedPaymentAwardEquityInstrumentsOtherThanOptionsExercisable" abstract="false" name="ShareBasedCompensationArrangementByShareBasedPaymentAwardEquityInstrumentsOtherThanOptionsExercisable" nillable="true" xbrli:periodType="instant" substitutionGroup="xbrli:item" type="xbrli:sharesItemType"/>
  <xs:element id="iivi_DebtInstrumentConvertibleMeasurementPeriod" abstract="false" name="DebtInstrumentConvertibleMeasurementPeriod" nillable="true" xbrli:periodType="duration" substitutionGroup="xbrli:item" type="xbrli:durationItemType"/>
  <xs:element id="iivi_SeriesB2ConvertiblePreferredStockMember" abstract="true" name="SeriesB2ConvertiblePreferredStockMember" nillable="true" xbrli:periodType="duration" substitutionGroup="xbrli:item" type="dtr-types:domainItemType"/>
  <xs:element id="iivi_TermBLoanFacilityMember" abstract="true" name="TermBLoanFacilityMember" nillable="true" xbrli:periodType="duration" substitutionGroup="xbrli:item" type="dtr-types:domainItemType"/>
  <xs:element id="iivi_CashBasedRestrictedStockUnitsMember" abstract="true" name="CashBasedRestrictedStockUnitsMember" nillable="true" xbrli:periodType="duration" substitutionGroup="xbrli:item" type="dtr-types:domainItemType"/>
  <xs:element id="iivi_PreferredStockDefaultOnPaymentObligationDividendRatePercentage" abstract="false" name="PreferredStockDefaultOnPaymentObligationDividendRatePercentage" nillable="true" xbrli:periodType="duration" substitutionGroup="xbrli:item" type="dtr-types:percentItemType"/>
  <xs:element id="iivi_SeniorSecuredCreditFacilityMember" abstract="true" name="SeniorSecuredCreditFacilityMember" nillable="true" xbrli:periodType="duration" substitutionGroup="xbrli:item" type="dtr-types:domainItemType"/>
  <xs:element id="iivi_ShareBasedCompensationSharesAuthorizedUnderStockOptionAndStockAppreciationRightPlansExercisePriceRangeLowerRangeLimit" abstract="false" name="ShareBasedCompensationSharesAuthorizedUnderStockOptionAndStockAppreciationRightPlansExercisePriceRangeLowerRangeLimit" nillable="true" xbrli:periodType="duration" substitutionGroup="xbrli:item" type="dtr-types:perShareItemType"/>
  <xs:element id="iivi_AerospaceDefenseMember" abstract="true" name="AerospaceDefenseMember" nillable="true" xbrli:periodType="duration" substitutionGroup="xbrli:item" type="dtr-types:domainItemType"/>
  <xs:element id="iivi_LesseeOperatingAndFinanceLeaseLiabilityPaymentsDue" abstract="false" name="LesseeOperatingAndFinanceLeaseLiabilityPaymentsDue" nillable="true" xbrli:periodType="instant" xbrli:balance="credit" substitutionGroup="xbrli:item" type="xbrli:monetaryItemType"/>
  <xs:element id="iivi_DeferredCompensationArrangementWithIndividualAllocatedShareBasedCompensationExpenseShares" abstract="false" name="DeferredCompensationArrangementWithIndividualAllocatedShareBasedCompensationExpenseShares" nillable="true" xbrli:periodType="duration" substitutionGroup="xbrli:item" type="xbrli:sharesItemType"/>
  <xs:element id="iivi_TemporaryEquityPricePerShare" abstract="false" name="TemporaryEquityPricePerShare" nillable="true" xbrli:periodType="instant" substitutionGroup="xbrli:item" type="dtr-types:perShareItemType"/>
  <xs:element id="iivi_DebtInstrumentConvertibleBusinessPeriod" abstract="false" name="DebtInstrumentConvertibleBusinessPeriod" nillable="true" xbrli:periodType="duration" substitutionGroup="xbrli:item" type="xbrli:durationItemType"/>
  <xs:element id="iivi_OperatingLossCarryForwardsIndefiniteAmount" abstract="false" name="OperatingLossCarryForwardsIndefiniteAmount" nillable="true" xbrli:periodType="instant" xbrli:balance="debit" substitutionGroup="xbrli:item" type="xbrli:monetaryItemType"/>
  <xs:element id="iivi_PensionAndOtherPostretirementDefinedBenefitPlansUnderfundedPensionLiability" abstract="false" name="PensionAndOtherPostretirementDefinedBenefitPlansUnderfundedPensionLiability" nillable="true" xbrli:periodType="instant" xbrli:balance="credit" substitutionGroup="xbrli:item" type="xbrli:monetaryItemType"/>
  <xs:element id="iivi_FifthRangeMember" abstract="true" name="FifthRangeMember" nillable="true" xbrli:periodType="duration" substitutionGroup="xbrli:item" type="dtr-types:domainItemType"/>
  <xs:element id="iivi_SignificantAccountingPoliciesTable" abstract="true" name="SignificantAccountingPoliciesTable" nillable="true" xbrli:periodType="duration" substitutionGroup="xbrldt:hypercubeItem" type="xbrli:stringItemType"/>
  <xs:element id="iivi_DeferredCompensationArrangementWithIndividualAllocatedShareBasedCompensationExpenseBenefit" abstract="false" name="DeferredCompensationArrangementWithIndividualAllocatedShareBasedCompensationExpenseBenefit" nillable="true" xbrli:periodType="duration" xbrli:balance="debit" substitutionGroup="xbrli:item" type="xbrli:monetaryItemType"/>
  <xs:element id="iivi_CashPaidForAmountsIncludedInMeasurementOfLeaseLiabilitiesAbstract" abstract="true" name="CashPaidForAmountsIncludedInMeasurementOfLeaseLiabilitiesAbstract" nillable="true" xbrli:periodType="duration" substitutionGroup="xbrli:item" type="xbrli:stringItemType"/>
  <xs:element id="iivi_LesseeOperatingAndFinanceLeaseLiabilityPaymentsDueAfterYearFive" abstract="false" name="LesseeOperatingAndFinanceLeaseLiabilityPaymentsDueAfterYearFive" nillable="true" xbrli:periodType="instant" xbrli:balance="credit" substitutionGroup="xbrli:item" type="xbrli:monetaryItemType"/>
  <xs:element id="iivi_PreferredStockAccretionPeriod" abstract="false" name="PreferredStockAccretionPeriod" nillable="true" xbrli:periodType="duration" substitutionGroup="xbrli:item" type="xbrli:durationItemType"/>
  <xs:element id="iivi_OperatingAndFinanceLeaseLiability" abstract="false" name="OperatingAndFinanceLeaseLiability" nillable="true" xbrli:periodType="instant" xbrli:balance="credit" substitutionGroup="xbrli:item" type="xbrli:monetaryItemType"/>
  <xs:element id="iivi_ShareBasedCompensationSharesAuthorizedUnderStockOptionAndStockAppreciationRightPlansExercisePriceRangeNumberOfExercisableOptionsAndStockAppreciationRight" abstract="false" name="ShareBasedCompensationSharesAuthorizedUnderStockOptionAndStockAppreciationRightPlansExercisePriceRangeNumberOfExercisableOptionsAndStockAppreciationRight" nillable="true" xbrli:periodType="instant" substitutionGroup="xbrli:item" type="xbrli:sharesItemType"/>
  <xs:element id="iivi_RightOfUseAssetObtainedInExchangeForOperatingLeaseLiabilityTotal" abstract="false" name="RightOfUseAssetObtainedInExchangeForOperatingLeaseLiabilityTotal" nillable="true" xbrli:periodType="duration" xbrli:balance="debit" substitutionGroup="xbrli:item" type="xbrli:monetaryItemType"/>
  <xs:element id="iivi_ShareBasedCompensationArrangementByShareBasedPaymentAwardEquityInstrumentsOtherThanOptionsAddedPerformanceGrants" abstract="false" name="ShareBasedCompensationArrangementByShareBasedPaymentAwardEquityInstrumentsOtherThanOptionsAddedPerformanceGrants" nillable="true" xbrli:periodType="duration" substitutionGroup="xbrli:item" type="xbrli:sharesItemType"/>
  <xs:element id="iivi_RestrictedShareAwardsRestrictedShareUnitsAndCashBasedRestrictedShareUnitAwardsMember" abstract="true" name="RestrictedShareAwardsRestrictedShareUnitsAndCashBasedRestrictedShareUnitAwardsMember" nillable="true" xbrli:periodType="duration" substitutionGroup="xbrli:item" type="dtr-types:domainItemType"/>
  <xs:element id="iivi_DerivativeBasisSpreadOnVariableRateTriggerForRightToReceivePayment" abstract="false" name="DerivativeBasisSpreadOnVariableRateTriggerForRightToReceivePayment" nillable="true" xbrli:periodType="instant" substitutionGroup="xbrli:item" type="dtr-types:percentItemType"/>
  <xs:element id="iivi_SharebasedCompensationSharesAuthorizedUnderStockOptionPlansAndStockAppreciationRightsExercisePriceRangeOutstandingSharesWeightedAverageExercisePrice" abstract="false" name="SharebasedCompensationSharesAuthorizedUnderStockOptionPlansAndStockAppreciationRightsExercisePriceRangeOutstandingSharesWeightedAverageExercisePrice" nillable="true" xbrli:periodType="instant" substitutionGroup="xbrli:item" type="dtr-types:perShareItemType"/>
  <xs:element id="iivi_MeasurementInputCostOfEquityMember" abstract="true" name="MeasurementInputCostOfEquityMember" nillable="true" xbrli:periodType="duration" substitutionGroup="xbrli:item" type="dtr-types:domainItemType"/>
  <xs:element id="iivi_FifthFiscalQuarterThroughEighthFiscalQuarterAfterClosingDateMember" abstract="true" name="FifthFiscalQuarterThroughEighthFiscalQuarterAfterClosingDateMember" nillable="true" xbrli:periodType="duration" substitutionGroup="xbrli:item" type="dtr-types:domainItemType"/>
  <xs:element id="iivi_NewTermFacilitiesMember" abstract="true" name="NewTermFacilitiesMember" nillable="true" xbrli:periodType="duration" substitutionGroup="xbrli:item" type="dtr-types:domainItemType"/>
  <xs:element id="iivi_DeferredTaxLiabilitiesConvertibleDebt" abstract="false" name="DeferredTaxLiabilitiesConvertibleDebt" nillable="true" xbrli:periodType="instant" xbrli:balance="credit" substitutionGroup="xbrli:item" type="xbrli:monetaryItemType"/>
  <xs:element id="iivi_ShareBasedCompensationArrangementByShareBasedPaymentAwardEquityInstrumentsOtherThanOptionsAddedPerformanceSharesGrantsWeightedAverageGrantDateFairValue" abstract="false" name="ShareBasedCompensationArrangementByShareBasedPaymentAwardEquityInstrumentsOtherThanOptionsAddedPerformanceSharesGrantsWeightedAverageGrantDateFairValue" nillable="true" xbrli:periodType="duration" substitutionGroup="xbrli:item" type="dtr-types:perShareItemType"/>
  <xs:element id="iivi_ExpendituresForPropertyPlantAndEquipment" abstract="false" name="ExpendituresForPropertyPlantAndEquipment" nillable="true" xbrli:periodType="duration" xbrli:balance="debit" substitutionGroup="xbrli:item" type="xbrli:monetaryItemType"/>
  <xs:element id="iivi_TemporaryEquityDividendRatePercentage" abstract="false" name="TemporaryEquityDividendRatePercentage" nillable="true" xbrli:periodType="duration" substitutionGroup="xbrli:item" type="dtr-types:percentItemType"/>
  <xs:element id="iivi_GoodwillAndOtherIntangibleAssetsLineItems" abstract="true" name="GoodwillAndOtherIntangibleAssetsLineItems" nillable="true" xbrli:periodType="duration" substitutionGroup="xbrli:item" type="xbrli:stringItemType"/>
  <xs:element id="iivi_TemporaryEquityStockIssuedDuringPeriodSharesNewIssues" abstract="false" name="TemporaryEquityStockIssuedDuringPeriodSharesNewIssues" nillable="true" xbrli:periodType="duration" substitutionGroup="xbrli:item" type="xbrli:sharesItemType"/>
  <xs:element id="iivi_RestOfWorldMember" abstract="true" name="RestOfWorldMember" nillable="true" xbrli:periodType="duration" substitutionGroup="xbrli:item" type="dtr-types:domainItemType"/>
  <xs:element id="iivi_BusinessAcquisitionEquityInterestsIssuedOrIssuableNumberOfSharesIssuedPerEachShare" abstract="false" name="BusinessAcquisitionEquityInterestsIssuedOrIssuableNumberOfSharesIssuedPerEachShare" nillable="true" xbrli:periodType="duration" substitutionGroup="xbrli:item" type="xbrli:sharesItemType"/>
</xs:schema>
