AMENDMENT NO. 3 TO LOAN AND SECURITY AGREEMENT Amendment No. 3 (the "Amendment"), dated as of June 29, 2012 (the "Effective Date"), to a certain Loan and Security Agreement by and between SOVEREIGN BANK, N.A. (f/k/a Sovereign Bank), a national banking association ("Lender"), with an address at 3 Terry Drive, Suite 102, Newtown, Pennsylvania 18940, and DYNASIL CORPORATION OF AMERICA, a Delaware corporation ("Borrower"). BACKGROUND WHEREAS, the Lender and the Borrower made, executed and delivered a Loan and Security Agreement, dated July 7, 2010, as amended by a certain Amendment No. 1 to Loan and Security Agreement dated as of April 1, 2011 and a certain Amendment No. 2 to Loan and Security Agreement effective as of March 31, 2012 (the "Original Loan Agreement"); and WHEREAS, the Lender has agreed to waive, pursuant to the terms and provisions of a letter agreement dated as of the date hereof between Borrower and Lender (the "Waiver Letter"), certain defaults by the Borrower under the Original Loan Agreement so long as this Amendment is executed and delivered by the Borrower. NOW, THEREFORE, in consideration of the mutual promises herein contained, and each intending to be legally bound hereby, the parties hereto hereby agree as follows: 1. Except as expressly defined herein, all terms used herein shall have the meanings ascribed to them in the Original Loan Agreement. This Amendment is intended to amend the Original Loan Agreement and the Original Loan Agreement shall be so amended from and as of the Effective Date. 2. Subsection 1(a) of the Original Loan Agreement is hereby amended so that the following definitions shall be amended and restated to read in their entireties as follows: ""Consolidated EBITDA" shall mean, for the Borrower and its Subsidiaries on a consolidated basis, without duplication, with respect to any fiscal measurement period, the sum of (a) net income (or loss) for that period, plus (b) the aggregate closing costs and similar costs and expenses incurred in connection with the consummation of the transactions contemplated by this Agreement, plus (c) any other non-recurring or unusual expense or loss acceptable to Lender in its sole discretion, minus (d) any non-recurring gain included in such net income, plus (e) Interest Expense for that period, plus (f) the aggregate amount of federal, state and foreign taxes on or measured by income for that period (whether or not payable during that period), plus (g) depreciation and amortization expense for that period, plus (h) non-cash stock compensation expenses in an aggregate amount not exceeding $1,000,000.00 in any fiscal year, plus (i) the aggregate reasonable transaction costs and expenses incurred in connection with the consummation of any Permitted Acquisition (so long as such Permitted Acquisition was approved by the Lender in accordance with the terms and provisions of this Agreement and actually consummated by the Borrower), plus (j) the aggregate reasonable transaction costs and expenses incurred in connection with the preparation, execution and delivery of the Amendment No. 3 to Loan and Security Agreement between Borrower and Lender dated as of June 29, 2012, plus (k) the aggregate reasonable transaction costs and expenses incurred in connection with the completion of the Required Capital Raise, and in the case of items (b) - (k), only to the extent included in determining net income for that period, in each case as determined in accordance with GAAP. "Consolidated Fixed Charges" shall mean with respect to Borrower and its Subsidiaries on a consolidated basis, without duplication, for any fiscal measurement period, the sum of (a) the Interest Expense for such period, plus (b) the aggregate principal amount of scheduled payments on any Indebtedness of Borrower or any Subsidiary (including without limitation all Capital Lease Obligations and the Loans but excluding any principal payments made with respect to the Entine Note) made during such period, plus (c) the sum of all cash dividends and other cash distributions to shareholders or other equity owners paid by Borrower during such period, plus (d) the sum of all taxes paid in cash by Borrower during such period, less (e) to the extent included in Interest Expense for, or taxes paid in cash by Borrower during, such period, up to $75,000.00 in the aggregate of interest and penalties paid by Borrower during such period in connection with the late federal income tax filing made by Borrower for the periods ending on September 30, 2008, September 30, 2009 and September 30, 2010." 3. Subsection 1(a) of the Original Loan Agreement is hereby further amended to add the following definitions thereto in the appropriate alphabetical order: ""Additional Ramp-up Period" shall have the meaning specified in subsection 13(b) hereof. "Consolidated Maximum Adjusted Leverage Ratio" shall mean with respect to Borrower and its Subsidiaries on a consolidated basis, without duplication, for any fiscal measurement period, the ratio of (i) Consolidated Total Funded Debt (excluding any Indebtedness subordinated to all Indebtedness owed by Borrower to Lender on terms and conditions which are acceptable to Lender in its sole discretion) to (ii) Consolidated EBITDA. "Entine Note" shall mean, collectively, those three (3) promissory notes, each dated as of June 7, 2012, in the original aggregate principal amount of $1,857,546.00, executed by the Borrower in favor of the Gerald Entine 1998 Family Trust, the Victoria Beth Entine Trust and the Oliver Andrew Entine Trust. "Required Capital Raise" shall mean the receipt by Borrower, after June 29, 2012 and on or before September 30, 2012, of at least $2,000,000.00 in gross proceeds from the sale of its Capital Stock and/or the incurrence of Indebtedness which is subordinated to all Indebtedness owed by Borrower to Lender on terms and conditions acceptable to Lender in its sole discretion (including without limitation a prohibition on the making of any principal payments on such subordinated Indebtedness until all Indebtedness owed by Borrower to Lender is indefeasibly paid in full). The proceeds of the Required Capital Raise shall be used by Borrower first to repay all amounts outstanding under the Entine Note and then to fund general working capital needs of Borrower." 4. Subsection 2(c) of the Original Loan Agreement is hereby amended so that all references to "Termination Date" set forth therein shall be changed to "June 29, 2012." 5. Subsection 12(b) of the Original Loan Agreement is hereby amended and restated to read in its entirety as follows: "(b) Indebtedness. Neither Borrower nor any Guarantor shall create, incur, assume or become obligated (directly or indirectly), for any loans or other Indebtedness for borrowed money other than the Loans, except that Borrower and the Guarantors, in the aggregate, may: (i) maintain the present indebtedness listed on Schedule 10(m) hereto; (ii) incur unsecured indebtedness to trade creditors in the ordinary course of business on standard terms; (iii) incur purchase money Indebtedness and Capital Lease Obligations, provided that the amount of such purchase money Indebtedness and Capital Lease Obligations shall not exceed, at any time, $1,000,000.00, in the aggregate, (iv) the Indebtedness represented by the promissory note referred to in subsection 12(e)(v) hereof, and (vi) incur Indebtedness which is part of the Required Capital Raise." 6. Subsection 12(e)(v) of the Original Loan Agreement is hereby amended and restated to read in its entirety as follows: "(v) enter into any other transaction outside the ordinary course of its business, including, without limitation, any purchase, redemption or retirement of any shares of any class of its stock or any other equity interest (other than, so long as no Default or Event of Default has occurred and is then continuing, or will be triggered thereby, Borrower shall be permitted to (A) repurchase up to one million shares of its common stock at a price of $2.00 per share during the period between July 1, 2010 and June 30, 2012, or issue a promissory note in lieu of such repurchase until such repurchase is consummated, as required pursuant to the terms and provisions of the RMD Acquisition Agreement), and (B) repurchase or redeem all or any of Borrower's Series C Preferred Stock, $.001 par value), or any issuance of any shares of, or warrants or other rights to receive or purchase any shares of, any class of its stock or any other equity interest (other than pursuant to an employee equity compensation plan maintained by Borrower or in conjunction with the Required Capital Raise)." 7. Section 13 of the Original Loan Agreement is hereby amended and restated to read in its entirety as follows: "13. FINANCIAL COVENANTS. Borrower shall maintain and keep in full force and effect each of the financial covenants set forth below: (a) Consolidated Maximum Leverage Ratio. Borrower shall maintain at all times a Consolidated Maximum Leverage Ratio which is equal to or less than (i) 3.00 to 1.00 for any period ended on or before December 31, 2011, (ii) 3.75 to 1.00 for the rolling four quarter period ending on March 31, 2012, (iii) 3.25 to 1.00 for the rolling four quarter period ending on June 30, 2012, and (iv) 4.50 to 1.00 for each of the rolling four quarter periods ending on September 30, 2012 and December 31, 2012, and (v) 4.00 to 1.00 for each rolling four quarter period ending on or after March 31, 2013. Borrower's compliance with this covenant shall be tested on a rolling four (4) quarters basis as of the last day of each quarter of each Fiscal Year of Borrower. Notwithstanding anything to the contrary set forth herein, for the purposes of determining the Consolidated Maximum Leverage Ratio at any time during the Ramp-up Period, the denominator of such ratio (for the avoidance of doubt, such denominator includes all items set forth in clause (ii) of the definition of SConsolidated Maximum Leverage Ratio") shall be determined as follows: (x) at September 30, 2010, on the basis of the fiscal quarter then ended, times 4; (y) at December 31, 2010, on the basis of the six (6) months then ended, times 2; and (z) at March 31, 2011, on the basis of the nine months then ended, times 4/3. Borrower and Lender hereby agree that, for purposes of calculating Consolidated Maximum Leverage Ratio hereunder during the Ramp-up Period, the amounts set forth in clauses (b), (c), (d) and (i) of the definition of "Consolidated EBITDA" shall not be annualized for any period. In addition, notwithstanding anything to the contrary set forth herein, for the purposes of determining the Consolidated Maximum Leverage Ratio at any time during the Additional Ramp-up Period, the denominator of such ratio (for the avoidance of doubt, such denominator includes all items set forth in clause (ii) of the definition of "Consolidated Maximum Leverage Ratio") shall be determined as follows: (a) at September 30, 2012, on the basis of the fiscal quarter then ended, times 4; (b) at December 31, 2012, on the basis of the six (6) months then ended, times 2; and (c) at March 31, 2013, on the basis of the nine months then ended, times 4/3. Borrower and Lender hereby agree that, for purposes of calculating Consolidated Maximum Leverage Ratio hereunder during the Additional Ramp-up Period, (1) the amounts set forth in clauses (c), (d), (i), (j) and (k) of the definition of "Consolidated EBITDA" shall not be annualized for any period. (b) Consolidated Fixed Charge Coverage Ratio. Borrower shall maintain at all times a Consolidated Fixed Charge Coverage Ratio of not less than (i) 1.20 to 1.00 for any period ended on or before December 31, 2011 or on or after September 30, 2013, (ii) 0.90 to 1.00 for the rolling four quarter period ending on March 31, 2012, (iii) 1.05 to 1.00 for the rolling four quarter period ending on June 30, 2012, (iv) 1.00 to 1.00 for each of the rolling four quarter periods ending on September 30, 2012 and December 31, 2012, (v) 1.05 to 1.00 for the rolling four quarter period ending on March 31, 2013, and (vi) 1.10 to 1.00 for the rolling four quarter period ending on June 30, 2013. Compliance with this covenant shall be tested on a rolling four (4) quarters basis as of the last day of each quarter of each Fiscal Year of Borrower. Notwithstanding anything to the contrary set forth herein, for the purposes of determining the Consolidated Fixed Charge Ratio at any time prior to June 30, 2011 (the "Ramp-up Period"), the numerator (for the avoidance of doubt, such numerator includes all items set forth in clause (i) of the definition of "Consolidated Fixed Charge Coverage Ratio") and the denominator of such ratio (for the avoidance of doubt, such denominator includes all items set forth in clause (ii) of the definition of "Consolidated Fixed Charge Coverage Ratio") shall be determined as follows: (x) at September 30, 2010, on the basis of the fiscal quarter then ended, times 4; (y) at December 31, 2010, on the basis of the six (6) months then ended, times 2; and (z) at March 31, 2011, on the basis of the nine months then ended, times 4/3. Borrower and Lender hereby agree that, for purposes of calculating Consolidated Fixed Charge Ratio hereunder during the Ramp-up Period, the amounts set forth in clauses (b), (c), (d) and (i) of the definition of "Consolidated EBITDA" shall not be annualized for any period. In addition, notwithstanding anything to the contrary set forth herein, for the purposes of determining the Consolidated Fixed Charge Ratio at any time on or after September 30, 2012 but prior to June 30, 2013 (the "Additional Ramp-up Period"), the numerator (for the avoidance of doubt, such numerator includes all items set forth in clause (i) of the definition of "Consolidated Fixed Charge Coverage Ratio") and the denominator of such ratio (for the avoidance of doubt, such denominator includes all items set forth in clause (ii) of the definition of "Consolidated Fixed Charge Coverage Ratio") shall be determined as follows: (a) at September 30, 2012, on the basis of the fiscal quarter then ended, times 4; (b) at December 31, 2012, on the basis of the six (6) months then ended, times 2; and (c) at March 31, 2013, on the basis of the nine months then ended, times 4/3. Borrower and Lender hereby agree that, for purposes of calculating Consolidated Fixed Charge Ratio hereunder during the Additional Ramp-up Period, (1) the amounts set forth in clauses (c), (d), (i), (j) and (k) of the definition of "Consolidated EBITDA" shall not be annualized for any period. (c) Unfunded Capital Expenditures. During the Fiscal Year of the Borrower ending on September 30, 2011, Borrower shall not incur Unfunded Capital Expenditures in excess of $2,000,000.00 in the aggregate (tested as of the last day of each fiscal quarter of such Fiscal Year on a year-to-date basis). During each Fiscal Year of the Borrower ending after September 30, 2011, Borrower shall not incur Unfunded Capital Expenditures in excess of $2,250,000.00 in the aggregate (tested as of the last day of each fiscal quarter ended after September 30, 2011 on a year-to-date basis). (d) Minimum Liquidity. At all times, Borrower shall maintain aggregate minimum cash balances of not less than $1,000,000.00 in accounts maintained by the Borrower with the Bank (to be verified in writing by Borrower as of the last day of each fiscal quarter of each Fiscal Year). (e) Consolidated Maximum Adjusted Leverage Ratio. Borrower shall maintain at all times a Consolidated Maximum Adjusted Leverage Ratio which is equal to or less than (i) 3.25 to 1.00 for each of the rolling four quarter periods ending on September 30, 2012 and December 31, 2012, and (iii) 3.00 to 1.00 for each rolling four quarter period ending on or after March 31, 2013. Borrower's compliance with this covenant shall be tested on a rolling four (4) quarters basis as of the last day of each quarter of each Fiscal Year of Borrower. Notwithstanding anything to the contrary set forth herein, for the purposes of determining the Consolidated Maximum Adjusted Leverage Ratio at any time during the Additional Ramp-up Period, the denominator of such ratio (for the avoidance of doubt, such denominator includes all items set forth in clause (ii) of the definition of "Consolidated Maximum Adjusted Leverage Ratio") shall be determined as follows: (a) at September 30, 2012, on the basis of the fiscal quarter then ended, times 4; (b) at December 31, 2012, on the basis of the six (6) months then ended, times 2; and (c) at March 31, 2013, on the basis of the nine months then ended, times 4/3. Borrower and Lender hereby agree that, for purposes of calculating Consolidated Maximum Adjusted Leverage Ratio hereunder during the Additional Ramp-up Period, (1) the amounts set forth in clauses (c), (d), (i), (j) and (k) of the definition of "Consolidated EBITDA" shall not be annualized for any period." 8. Section 14 of the Original Loan Agreement is hereby amended to add subsections (q) and (r) thereto which shall read in their entirety as follows: "(q) Required Capital Raise. Borrower shall fail, for any reason, to complete the Required Capital Raise on or before September 30, 2012. (r) Entine Note. Any default shall occur under the Entine Note or any Indebtedness evidenced by the Entine Note shall be outstanding after September 30, 2012." 9. All representations, warranties and covenants of the Borrower contained in the Original Loan Agreement are hereby ratified and confirmed by the Borrower without condition as if made anew upon the execution of this Amendment and are hereby incorporated by reference. All representations, warranties and covenants of the Borrower, whether hereunder, or contained in the Original Loan Agreement or in any Other Agreement shall remain in full force and effect until all amounts due under the Original Loan Agreement, as amended herein, the Notes, and each Other Agreement are satisfied in full. 10. Except as modified by the terms hereof, all terms, provisions and conditions of the Original Loan Agreement are in full force and effect and are hereby incorporated by reference as if set forth herein. This Amendment and the Original Loan Agreement shall be deemed as complementing and not restricting the Lender's rights hereunder or thereunder. If there is any conflict or discrepancy between the provisions of this Amendment and any provision of the Original Loan Agreement, the terms and provisions of this Amendment shall control and prevail. 11. The Borrower hereby represents, warrants and certifies to the Lender, after giving effect to the Waiver Letter, that no Default or Event of Default has occurred and is presently existing under the Loan Documents. 12. Pursuant to the terms of the Original Loan Agreement, as amended herein, the Borrower has provided to the Lender, as security for the payment of all Loans now or in the future made by the Lender to the Borrower and for the payment or other satisfaction of all other Liabilities, a first priority, perfected security interest in the Collateral. The Borrower hereby ratifies and confirms the liens and security interests granted under the Original Loan Agreement and the Other Agreements; and further ratifies and confirms, without condition, that the perfected status and priority of such liens and security interests shall not be affected in any way by the amendments to the Original Loan Agreement as set forth herein. 13. In order to induce the Lender to enter into this Amendment, the Borrower shall first satisfy the following conditions precedent: (a) The Borrower shall have executed (and/or caused to be executed), and delivered to the Lender the following: (i) this Amendment; (ii) the Waiver Letter (iii) a Confirmation of Guarantee duly executed by each of Optometrics Corporation, Evaporated Metal Films Corp., Radiation Monitoring Devices, Inc., RMD Instruments Corp. and Dynasil Biomedical Corp. (collectively, the "Guarantors"), in form and substance satisfactory to the Lender in its sole discretion (the "Confirmation of Guarantee"); and (iv) such other documents and instruments as the Lender may reasonably request. (b) The Borrower shall also deliver to the Lender the following: (i) payment in full of a non-refundable waiver fee in the amount of $31,101.19; and (ii) any and all other documents, agreements and certificates reasonably requested by the Lender to carry out the intentions of this Amendment. 14. This Amendment (a) shall be construed and enforced in accordance with the laws of the State of New Jersey; (b) shall inure to the benefit of, and be binding upon, the parties hereto and their respective successors and assigns; (c) may be executed in two or more counterparts, each of which shall be deemed an original, but all of which together shall constitute one and the same instrument; and (d) may only be amended or modified pursuant to a writing signed by the parties hereto. 15. The Borrower hereby agrees that it will pay or cause to be paid, or reimburse the Lender for, all of the costs and expenses incurred by the Lender in connection with negotiation, preparation and enforcement of this Amendment and the transactions contemplated herein, including without limitation the fees and out-of-pocket expenses of the Lender's legal counsel. 16. The Borrower hereby waives any and all rights which it may have to a jury trial in connection with any litigation commenced or against the Lender with respect to the right and obligations of the parties hereto. [REMAINDER OF PAGE INTENTIONALLY LEFT BLANK] IN WITNESS WHEREOF, the undersigned have caused this Amendment to be executed and delivered by their respective officers thereunto duly authorized. DYNASIL CORPORATION OF AMERICA By:___________________________________ _ Name: Richard Johnson Title: Chief Financial Officer SOVEREIGN BANK, N.A. By:___________________________________ _ Name: Daniel Vereb Title: Senior Vice President 8602605v3