1
                                  Exhibit 3.1             FEDERAL IDENTIFICATION
                                                                  NO. 04-2897945
   JSD
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Examiner
        WB

  N/A
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Name
Approved
                       THE COMMONWEALTH OF MASSACHUSETTS
                             WILLIAM FRANCIS GALVIN
                         Secretary of the Commonwealth
             One Ashburton Place, Boston, Massachusetts 02108-1512

                             ARTICLES OF AMENDMENT
                    (GENERAL LAWS, CHAPTER 156B, SECTION 72)

We,     D. Verne Sharma                                             , *President
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and     James A. Lightman                           , *Clerk / *Assistant Clerk,
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of      Summit Technology, Inc.
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                    (Exact name of corporation)

located at    21 Hickory Drive, Waltham, MA 02154
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                      (Street address of corporation in Massachusetts)

certify that these Articles of Amendment affecting articles numbered:

         Three (3)
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          (Number those articles 1, 2, 3, 4, 5 and/or 6 being amended)

of the Articles of Organization were duly adopted at a meeting held on
    4/29    , 1999, by vote of:
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27,404,640 shares of   Common, $.01 par value  of 31,153,765 shares outstanding,
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                   (type, class & series, if any)

          shares of                         of           shares outstanding, and
- ---------           -----------------------    ---------
                   (type, class & series, if any)

          shares of                            of            shares outstanding,
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                   (type, class & series, if any)

(1)**being at least a majority of each type, class or series outstanding and
entitled to vote thereon: / or (2)**being at least two-thirds of each type,
class or series outstanding and entitled to vote thereon and of each type, class
or series of stock whose rights are adversely affected thereby:


*Delete the inapplicable words.       **Delete the inapplicable clause.
(1) For amendments adopted pursuant to Chapter 156B, Section 70.
(2) For amendments adopted pursuant to Chapter 156B, Section 71.
Note: If the space provided under any article or item on this form is
insufficient, additions shall be set forth on one side only of separate 8 1/2 x
11 sheets of paper with a left margin of at least 1 inch. Additions to more
than one article may be made on a single sheet so long as each article
requiring each addition is clearly indicated.

    4
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P.C.

   2
To change the number of shares and the par value (if any) of any type, class or
series of stock which the corporation is authorized to issue, fill in the
following:

The total presently authorized is:


   WITHOUT PAR VALUE STOCKS                   WITH PAR VALUE STOCKS
- --------------------------------  ------------------------------------------------
TYPE         NUMBER OF SHARES         TYPE     NUMBER OF SHARES      PAR VALUE
- --------------------------------  ------------------------------------------------
                                                         
Common:                              Common:       60,000,000         $0.01
- --------------------------------  ------------------------------------------------

- --------------------------------  ------------------------------------------------
Preferred:                           Preferred:     5,000,000         $0.01
- --------------------------------  ------------------------------------------------

- --------------------------------  ------------------------------------------------


Change the total authorized to:



 WITHOUT PAR VALUE STOCKS                   WITH PAR VALUE STOCKS
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TYPE         NUMBER OF SHARES         TYPE     NUMBER OF SHARES      PAR VALUE
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Common:                              Common:      100,000,000         $0.01
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- --------------------------------  ------------------------------------------------
Preferred:                           Preferred:     5,000,000         $0.01
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- --------------------------------  ------------------------------------------------


   3
The foregoing amendment(s) will become effective when these Articles of
Amendment are filed in accordance with General Laws, Chapter 156B, Section 6
unless these articles specify, in accordance with the vote adopting the
amendment, a later effective date not more than thirty days after such filing,
in which event the amendment will become effective on such later date.


Later effective date:
                      ----------------------------


SIGNED UNDER THE PENALTIES OF PERJURY, this 29th day of April, 1999.

          /s/ D. Verne Sharma
- -----------------------------------------, *President
          D. Verne Sharma


          /s/ James A. Lightman
- -----------------------------------------, *Clerk/*Assistant Clerk
          James A. Lightman


*Delete the inapplicable words.
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                       THE COMMONWEALTH OF MASSACHUSETTS

                             ARTICLES OF AMENDMENT
                    (GENERAL LAWS, CHAPTER 156B, SECTION 72)

                 ==============================================

I hereby approve the within Articles of Amendment and, the filing fee in the
amount of $40,000.00 having been paid, said articles are deemed to have been
filed with me this 30th day of April 1999.

Effective date:
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                           /s/ William Francis Galvin
                             WILLIAM FRANCIS GALVIN
                         Secretary of the Commonwealth


                         TO BE FILLED IN BY CORPORATION
                      PHOTOCOPY OF DOCUMENT TO BE SENT TO:

                         Mary C. Kelly Burke
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                         Ropes & Gray
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                         One International Place, Boston, MA 02110-2624
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                    Telephone: 617-951-7545
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