[GRAPHIC OMITTED] Silicon Valley Bank Amendment to Loan Agreement Borrower: Advanced Photonix, Inc. Address: 1240 Avenida Acaso Camarillo, California 93012 Dated as of: July 16, 1998 THIS AMENDMENT TO LOAN AGREEMENT is entered into between SILICON VALLEY BANK ("Silicon") and the borrower named above (the "Borrower"). The Parties agree to amend the Loan and Security Agreement between them dated September 6, 1995, as amended by that Amendment to Loan Agreement dated September 6, 1996 and as amended by that Amendment to Loan Agreement dated as of July 15, 1997 (and as otherwise amended from time to time, the "Loan Agreement") as follows, effective as of the date hereof. (Capitalized terms used but not defined in this Agreement, shall have the meanings set forth in the Loan Agreement.) 1. Amended Schedule. The Schedule to Loan and Security Agreement is hereby amended in its entirety and replaced with the Amended Schedule to Loan and Security Agreement attached hereto. 2. Fee. Borrower shall concurrently herewith pay a fee to Silicon in the amount of $2,500, which shall be in addition to all interest and all other amounts payable hereunder, and which shall not be refundable. 3. Representations True. Borrower represents and warrants to Silicon that all representations and warranties set forth in the Loan Agreement, as amended hereby, are true and correct. 4. General Provisions. This Extension Agreement, the Loan Agreement, any prior written amendments to the Loan Agreement signed by Silicon and the Borrower, and the other written documents and agreements between Silicon and the Borrower set forth in full all of the representations and agreements of the parties with respect to the subject matter hereof and supersede all prior discussions, representations, agreements and understandings between the parties with respect to the subject hereof. Except as herein expressly amended, all of the terms and provisions of the Loan Agreement, as so amended, and all other documents and agreements between Silicon and the Borrower shall continue in full force and effect and the same are hereby ratified and confirmed. Borrower: Silicon: ADVANCED PHOTONIX, INC. SILICON VALLEY BANK By /s/Harry Melkonian By Karl R. Brier ------------------ ------------- President or Vice President Title Vice President -------------- By /s/P. J. Holmes ------------------- Secretary or Ass't Secretary [GRAPHIC OMITTED] SILICON VALLEY BANK Schedule to Loan and Security Agreement Borrower: Advanced Photonix, Inc. Address: 1240 Avenida Acaso Camarillo, California 93012 Dated: July 16, 1998 THIS SCHEDULE is an integral part of the Loan and Security Agreement between Silicon Valley Bank ("Silicon") and the above-named borrower ("Borrower") of even date. Credit Limit (Section 1.1): An amount not to exceed the lesser of: (i) $1,000,000 at any one time outstanding; or (ii) 75% * of the Net Amount of Borrower's accounts, which Silicon in its discretion deems eligible for borrowing. "Net Amount" of an account means the gross amount of the account, minus all applicable sales, use, excise and other similar taxes and minus all discounts, credits and allowances of any nature granted or claimed. * (provided that on and after a Borrowing Audit (as defined in Section 4.5 of the Loan Agreement), this percentage may be modified in the reasonable discretion of Silicon based on the results of any such audit) Without limiting the fact that the determination of which accounts are eligible for borrowing is a matter of Silicon's discretion, the following will not be deemed eligible for borrowing: accounts outstanding for more than 90 days from the invoice date, accounts subject to any contingencies, accounts owing from the United States or any department, agency or instrumentality of the United States or any state, city or municipality, accounts owing from an account debtor outside the United States (unless pre- approved by Silicon in its discretion, or backed by a letter of credit satisfactory to Silicon, or FCIA insured satisfactory to Silicon), accounts owing from one account debtor to the extent they exceed 25% of the total eligible accounts outstanding, accounts owing from an affiliate of Borrower, and accounts owing from an account debtor to whom Borrower is or may be liable for goods purchased from such account debtor or otherwise. In addition, if more than 50% of the accounts owing from an account debtor are outstanding more than 90 days from the invoice date or are otherwise not eligible accounts, then all accounts owing from that account debtor will be deemed ineligible for borrowing. Letter of Credit Sublimit Silicon, in its reasonable discretion, will from time to time during the term of this Agreement issue letters of credit for the account of the Borrower ("Letters of Credit"), in an aggregate amount at any one time outstanding not to exceed $100,000, upon the request of the Borrower, provided that, on the date the Letters of Credit are to be issued, Borrower has available to it Loans in an amount equal to or greater than the face amount of the Letters of Credit to be issued. 1 Prior to the issuance of any Letters of Credit, Borrower shall execute and deliver to Silicon Applications for Letters of Credit and such other documentation as Silicon shall specify (the "Letter of Credit Documentation"). Fees for the Letters of Credit shall be as provided in the Letter of Credit Documentation. Letters of Credit may have a maturity date up to twelve months beyond the Maturity Date in effect from time to time, provided that if on the Maturity Date, or on any earlier effective date of termination, there are any outstanding letters of credit issued by Silicon or issued by another institution based upon an application, guarantee, indemnity or similar agreement on the part of Silicon, then on such date Borrower shall provide to Silicon cash collateral in an amount equal to the face amount of all such letters of credit plus all interest, fees and costs due or to become due in connection therewith, to secure all of the Obligations relating to said letters of credit, pursuant to Silicon's then standard form cash pledge agreement. The Credit Limit set forth above and the Loans available under this Agreement at any time shall be reduced by the face amount of Letters of Credit from time to time outstanding. Interest Rate (Section 1.2): A rate equal to the "Prime Rate" in effect from time to time, plus 0.50% per annum. Interest shall be calculated on the basis of a 360-day year for the actual number of days elapsed. "Prime Rate" means the rate announced from time to time by Silicon as its "prime rate;" it is a base rate upon which other rates charged by Silicon are based, and it is not necessarily the best rate available at Silicon. The interest rate applicable to the Obligations shall change on each date there is a change in the Prime Rate. Loan Origination Fee (Section 1.3): See Amendment to Loan Agreement. Maturity Date (Section 5.1): July 15, 1999 Prior Names of Borrower (Section 3.2): Xsirius Photonix, Inc. Trade Names of Borrower (Section 3.2): None Other Locations and Addresses (Section 3.3): None Material Adverse Litigation (Section 3.10): None Negative Covenants-Exceptions (Section 4.6): Without Silicon's prior written consent, Borrower may do the following, provided that, after giving effect thereto, no Event of Default has occurred and no event has occurred which, with notice or passage of time or both, would constitute an Event of Default, and provided that the following are done in compliance with all applicable laws, rules and regulations: (i) repurchase shares of Borrower's stock pursuant to any employee stock purchase or benefit plan, provided that the total amount paid by Borrower for such stock does not exceed $100,000 in any fiscal year. 2 Financial Covenants (Section 4.1): Borrower shall comply with all of the following covenants. Compliance shall be determined as of the end of each fiscal month, except as otherwise specifically provided below: Quick Asset Ratio: Borrower shall maintain a ratio of "Quick Assets" to current liabilities of not less than 2.00 to 1. Tangible Net Worth: Borrower shall maintain a tangible net worth of not less than $3,000,000. Definitions: "Current assets," and "current liabilities" shall have the meanings ascribed to them in accordance with generally accepted accounting principles. "Tangible net worth" means the excess of total assets over total liabilities, determined in accordance with generally accepted accounting principles, excluding however all assets which would be classified as intangible assets under generally accepted accounting principles, including without limitation goodwill, licenses, patents, trademarks, trade names, copyrights, capitalized software and organizational costs, licences and franchises. "Quick Assets" means cash on hand or on deposit in banks, readily marketable securities issued by the United States, readily marketable commercial paper rated "A-1" by Standard & Poor's Corporation (or a similar rating by a similar rating organization), certificates of deposit and banker's acceptances, and accounts receivable (net of allowance for doubtful accounts). Subordinated Debt: "Liabilities" for purposes of the foregoing covenants do not include indebtedness which is subordinated to the indebtedness to Silicon under a subordination agreement in form specified by Silicon or by language in the instrument evidencing the indebtedness which is acceptable to Silicon. Other Covenants (Section 4.1): Borrower shall at all times comply with all of the following additional covenants: 1. Banking Relationship. Borrower shall at all times maintain its primary banking relationship with Silicon. 2. Monthly Borrowing Base Certificate and Listing. When any Loans or Obligations relating thereto are outstanding, within 20 days after the end of each month, Borrower shall provide Silicon with a Borrowing Base Certificate in such form as Silicon shall specify, and an aged listing of Borrower's accounts receivable and accounts payable. At all other times, within 20 days after the end of each quarter, Borrower shall provide Silicon with a Borrowing Base Certificate in such form as Silicon shall specify, and an aged listing of Borrower's accounts receivable and accounts payable 3. Indebtedness. Without limiting any of the foregoing terms or provisions of this Agreement, Borrower shall not in the future incur indebtedness for borrowed money, except for (i) indebtedness to Silicon, and (ii) indebtedness incurred in the future for the purchase price of or lease of equipment in an aggregate amount not exceeding $750,000 at any time outstanding. 3 4. Update. At such time that the Borrower requests Loans such that the Obligations outstanding hereunder shall exceed $200,000, Borrower shall supply an update to Silicon of the intellectual property portion of the representations and warranties form Borrower has previously supplied to Silicon in order to allow Silicon to prepare such supplemental security agreements and take such additional actions as Silicon deems necessary or advisable in order to perfect its security interest in such items of Borrower's intellectual property not already subject to Silicon's perfected security interest. Borrower: ADVANCED PHOTONIX, INC. By /s/Harry Melkonian President or Vice President By /s/P. J. Holmes Secretary or Ass't Secretary Silicon: SILICON VALLEY BANK By /s/Karl R. Brier Title Vice President 4