FRANKLIN, Mass., Dec. 7 -- Thermo Vision Corp. announced that it has received clearance of its proxy materials from the Securities and Exchange Commission, and consequently has set January 6, 2000, as the date for its shareholder vote on the firm's proposed merger into its parent company, Thermo Instrument Systems Inc. The proposed agreement calls for shareholders of Thermo Vision -- other than Thermo Instrument Systems and Thermo Electron -- to receive a cash payment of seven dollars in exchange for each share held of company common stock. Thermo Vision's common stock would then cease to be publicly traded, and the company would become a private subsidiary of Thermo Instrument.Completion of the transaction is dependent upon holders of a majority of outstanding shares of Thermo Vision common stock -- excluding Thermo Instrument, Thermo Electron, and the officers and directors of both companies as well as Thermo Vision -- being present at the meeting and voting in favor of the proposed merger agreement.