UNITED STATES
                             Washington, D.C. 20549

                                    FORM 8-K
                                 Current Report

                     Pursuant to Section 13 or 15(d) of the
                         Securities Exchange Act of 1934

         Date of Report (Date of Earliest Event Reported): July 23, 2003

                               COGNEX CORPORATION
            (Exact name of registrant as specified in its charter)

         Massachusetts                  0-17869                  04-2713778
-------------------------------   ------------------------   ------------------
(State or other jurisdiction of   (Commission File Number)    (I.R.S. Employer
 incorporation or organization)                              Identification No.)

                                One Vision Drive
                        Natick, Massachusetts 01760-2059
                                 (508) 650-3000
              (Address, including zip code, and telephone number,
              including area code, of principal executive offices)

Item 7.  Financial Statements, Pro Forma Financial Information and Exhibits.

(c)      Exhibits

Exhibit No.       Description
----------        -----------

  99.1            News release, dated July 23, 2003, by Cognex Corporation

Item 9.           Regulation FD Disclosure (Information Provided Under Item 12 -
                  Results of Operations and Financial Condition)

The following information is being provided under Item 12 - Results of
Operations and Financial Condition. It is being furnished under Item 9 of this
Form 8-K in accordance with interim guidance issued by the SEC in release nos.
33-8216 and 34-47583. Such information, including the Exhibit attached hereto,
shall not be deemed "filed" for purposes of Section 18 of the Securities
Exchange Act of 1934, nor shall it be deemed to be incorporated by reference in
any filing under the Securities Act of 1933 or the Securities Exchange Act of
1934, regardless of any general incorporation language in such filing.

On July 23, 2003, Cognex Corporation issued a news release to report its
financial results for the second quarter ended June 29, 2003. The release is
furnished as Exhibit 99.1 hereto.


Pursuant to the requirements of the Securities Exchange Act of 1934, as amended,
the registrant has duly caused this report to be filed on its behalf by the
undersigned hereunto duly authorized.

                                          COGNEX CORPORATION

Dated: July 23, 2003                      By: /s/ Richard A. Morin
                                          Richard A. Morin
                                          Senior Vice President of Finance,
                                          Chief Financial Officer, and Treasurer