EXHIBIT 31.1

CERTIFICATION PURSUANT TO RULE 13a-14(a) OR 15d-14(a)
OF THE SECURITIES EXCHANGE ACT OF 1934,
AS ADOPTED PURSUANT TO SECTION 302 OF
THE SARBANES-OXLEY ACT OF 2002

I, J. Bruce Robinson, certify that:

|1) | I have reviewed this quarterly report on Form 10-Q of Zygo Corporation;                                                                                                                                                                                                                                                                                                                                                   
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|2) | Based on my knowledge, this  report does not contain any untrue statement of a material fact or omit to state a material fact necessary to make the statements made, in light
of the circumstances under which such statements were made, not misleading with respect to the period covered by this report;                                                                                                               
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|3) | Based on my knowledge, the financial statements, and other financial information included in this report, fairly present in all material respects the financial condition, results of operations and cash flows
of the registrant as of, and for, the periods presented in this report;                                                                                                                                   
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|4) | The registrants other certifying officer(s) and I are responsible for establishing and maintaining disclosure controls and procedures (as defined in Exchange Act Rules 13a-15(e) and 15d-15(e)) and
internal control over financial reporting (as defined in Exchange Act Rules 13a-15(f) and 15d-15(f)) for the registrant and have:                                                                                   
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|   | a)     Designed such disclosure controls and procedures,
    or caused such disclosure controls and procedures to be designed under our supervision, to ensure that material information relating to the registrant, including its consolidated subsidiaries, is made known to us by others within those entities, particularly
during the period in which this report is being prepared;                                 
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|   | b)     Designed such internal control over financial
      reporting, or caused such internal control over financial reporting to
      be designed under our supervision, to provide reasonable assurance regarding
      the reliability of financial reporting and the preparation of financial
      statements for external purposes in accordance with generally accepted
    accounting principles;                
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|   | c)     Evaluated the effectiveness of the registrants
      disclosure controls and procedures and presented in this report our conclusions
      about the effectiveness of the disclosure controls and procedures, as of
      the end of the period covered by this report based on such evaluation;
    and                                                                                                          
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|   | d)     Disclosed in this report any change in the registrants
      internal control over financial reporting that occurred during the registrants
      most recent fiscal quarter (the registrants fourth fiscal quarter
      in the case of an annual report) that has materially affected, or is reasonably
      likely to materially affect, the registrants internal control over
    financial reporting; and
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|5) | The registrants other certifying officer(s) and I have disclosed, based on our most recent evaluation of internal control over financial reporting, to the registrants auditors and the audit
committee of the registrants board of directors (or persons performing the equivalent functions):                                                                                                                        
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|   | a)     All significant deficiencies and material weaknesses
    in the design or operation of internal control over financial
    reporting which are reasonably likely to adversely affect the registrants
    ability to record, process, summarize and report financial information; and                                                                                                                              
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|   | b)     Any fraud, whether or not material, that involves
      management or other employees who have a significant role in the registrants
    internal control over financial reporting.                                                                                                                                                                                                                               
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|Date: May 12, 2008 |  |                        
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|                   |  | /s/ J. Bruce Robinson  
|                   |  | J. Bruce Robinson      
|                   |  | Chairman and           
|                   |  | Chief Executive Officer

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