<?xml version="1.0"?>
<ownershipDocument>

    <schemaVersion>X0306</schemaVersion>

    <documentType>4</documentType>

    <periodOfReport>2018-06-22</periodOfReport>

    <notSubjectToSection16>1</notSubjectToSection16>

    <issuer>
        <issuerCik>0000006284</issuerCik>
        <issuerName>ANALOGIC CORP</issuerName>
        <issuerTradingSymbol>ALOG</issuerTradingSymbol>
    </issuer>

    <reportingOwner>
        <reportingOwnerId>
            <rptOwnerCik>0001419544</rptOwnerCik>
            <rptOwnerName>Fry John J</rptOwnerName>
        </reportingOwnerId>
        <reportingOwnerAddress>
            <rptOwnerStreet1>C/O ANALOGIC CORPORATION</rptOwnerStreet1>
            <rptOwnerStreet2>8 CENTENNIAL DRIVE</rptOwnerStreet2>
            <rptOwnerCity>PEABODY</rptOwnerCity>
            <rptOwnerState>MA</rptOwnerState>
            <rptOwnerZipCode>01960</rptOwnerZipCode>
            <rptOwnerStateDescription></rptOwnerStateDescription>
        </reportingOwnerAddress>
        <reportingOwnerRelationship>
            <isDirector>0</isDirector>
            <isOfficer>1</isOfficer>
            <isTenPercentOwner>0</isTenPercentOwner>
            <isOther>0</isOther>
            <officerTitle>See Remarks</officerTitle>
        </reportingOwnerRelationship>
    </reportingOwner>

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            <transactionTimeliness>
                <value></value>
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            <transactionAmounts>
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                </transactionShares>
                <transactionPricePerShare>
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                </transactionAcquiredDisposedCode>
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                </sharesOwnedFollowingTransaction>
            </postTransactionAmounts>
            <ownershipNature>
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                </directOrIndirectOwnership>
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                </sharesOwnedFollowingTransaction>
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                    <value>D</value>
                </directOrIndirectOwnership>
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            </securityTitle>
            <transactionDate>
                <value>2018-06-22</value>
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            <deemedExecutionDate></deemedExecutionDate>
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                <transactionPricePerShare>
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                    <footnoteId id="F1"/>
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                </directOrIndirectOwnership>
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    </nonDerivativeTable>

    <derivativeTable>
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            <deemedExecutionDate></deemedExecutionDate>
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            <transactionTimeliness>
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            </transactionTimeliness>
            <transactionAmounts>
                <transactionShares>
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                <transactionPricePerShare>
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            <exerciseDate>
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            <expirationDate>
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            <underlyingSecurity>
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                </underlyingSecurityShares>
            </underlyingSecurity>
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        <derivativeTransaction>
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            <expirationDate>
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                </underlyingSecurityTitle>
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                </underlyingSecurityShares>
            </underlyingSecurity>
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                </sharesOwnedFollowingTransaction>
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                </directOrIndirectOwnership>
            </ownershipNature>
        </derivativeTransaction>
        <derivativeTransaction>
            <securityTitle>
                <value>Non-Qualified Stock Option (Right to Buy)</value>
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            </conversionOrExercisePrice>
            <transactionDate>
                <value>2018-06-22</value>
            </transactionDate>
            <deemedExecutionDate></deemedExecutionDate>
            <transactionCoding>
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                <equitySwapInvolved>0</equitySwapInvolved>
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            <transactionTimeliness>
                <value></value>
            </transactionTimeliness>
            <transactionAmounts>
                <transactionShares>
                    <value>6913</value>
                </transactionShares>
                <transactionPricePerShare>
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                <transactionAcquiredDisposedCode>
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            <expirationDate>
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            <underlyingSecurity>
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                </underlyingSecurityTitle>
                <underlyingSecurityShares>
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            </underlyingSecurity>
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        <derivativeTransaction>
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            <expirationDate>
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                    <value>D</value>
                </directOrIndirectOwnership>
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        </derivativeTransaction>
        <derivativeTransaction>
            <securityTitle>
                <value>Restricted Stock Units</value>
            </securityTitle>
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            <transactionDate>
                <value>2018-06-22</value>
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                <transactionCode>M</transactionCode>
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            <transactionTimeliness>
                <value></value>
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                </transactionShares>
                <transactionPricePerShare>
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            <expirationDate>
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            <underlyingSecurity>
                <underlyingSecurityTitle>
                    <value>Common Stock</value>
                </underlyingSecurityTitle>
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                    <value>7116</value>
                </underlyingSecurityShares>
            </underlyingSecurity>
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                </sharesOwnedFollowingTransaction>
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                <directOrIndirectOwnership>
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                </directOrIndirectOwnership>
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        </derivativeTransaction>
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            <securityTitle>
                <value>Restricted Stock Units</value>
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                <value>2018-06-22</value>
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                <transactionCode>M</transactionCode>
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                <value></value>
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                    <value>8116</value>
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                <transactionPricePerShare>
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                    <value>D</value>
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                    <value>Common Stock</value>
                </underlyingSecurityTitle>
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                    <value>0</value>
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    </derivativeTable>

    <footnotes>
        <footnote id="F1">On June 22, 2018, pursuant to the Agreement and Plan of Merger, by and among the issuer, AC Merger Sub, Inc. (&quot;Merger Sub&quot;) and ANLG Holding Company, Inc. (&quot;Parent&quot;), dated April 10, 2018 (the &quot;Merger Agreement&quot;), Merger Sub merged with and into the issuer (the &quot;Merger&quot;), with the issuer surviving the Merger as a wholly owned subsidiary of Parent.  Pursuant to the Merger Agreement, at the effective time of the Merger, the shares of Common Stock automatically converted into the right to receive $84.00 per share in cash (the &quot;Merger Consideration&quot;).</footnote>
        <footnote id="F2">Effective as of immediately prior to the effective time of the Merger, each then-outstanding and unexercised stock option of the issuer with an exercise price less than $84.00 was automatically canceled and converted into the right to receive from the surviving corporation an amount of cash equal to the product of (i) the total number of shares of Common Stock then underlying such stock option multiplied by (ii) the excess of the $84.00 over the exercise price per share of such stock option, on the terms set forth in the Merger Agreement.</footnote>
        <footnote id="F3">Represents unvested time-based restricted stock unit awards that became vested and were converted in the Merger into the right to receive the Merger Consideration. Pursuant to the terms of the Merger Agreement, each outstanding and unvested time-based restricted share unit as of immediately prior to the Effective Time vested in full and was automatically canceled and converted into the right to receive the Merger Consideration for each underlying share.</footnote>
        <footnote id="F4">Represents unvested performance-based share unit awards that became vested and were converted in the Merger into the right to receive the Merger Consideration. Pursuant to the terms of the Merger Agreement, each outstanding and unvested performance-based restricted share unit as of immediately prior to the Effective Time vested with respect to the number of shares of Common Stock that would have been earned in accordance with the methodology set forth in the applicable award agreement or previously established by the Compensation Committee of the issuer's Board of Directors and was automatically canceled and converted into the right to receive the Merger Consideration for each underlying share.</footnote>
    </footnotes>

    <remarks>Senior Vice President, General Counsel and Secretary</remarks>

    <ownerSignature>
        <signatureName>/s/ John J. Fry</signatureName>
        <signatureDate>2018-06-26</signatureDate>
    </ownerSignature>
</ownershipDocument>
