A federal judge has dismissed a former senior Pentagon official's $500,000 lawsuit charging three top Navy officials pressured the Raytheon Co. to fire him because he publicly criticized the defense budget.

The suit by former Assistant Defense Secretary Lawrence Korb alleged that two aides to John Lehman, then the Navy secretary, made threatening telephone calls to the company in February 1986, a day after his public criticism. Korb said he soon was forced to resign as head of the firm's Washington office.The complaint, filed in U.S. District Court in Alexandria, Va., named as defendants Lehman, Assistant Navy Secretary Everett Pyatt, former Assistant Secretary Melvyn Paisley and Carl Smith, a senior staffer on the Senate Armed Services Committee who also phoned the company.