Iris-Type Vacuum Equipment Window Shutter
Original Publication Date: 1986-Oct-01
Included in the Prior Art Database: 2005-Mar-09
An iris type mechanical shutter actuated by a remote drive provides an unobstructed view and reduces need for frequent vacuum system window replacement. In construction, UHV materials are used for vacuum compatibility. Individual curved strips of metal rotate simultaneously back and forth to open or close this shutter. They overlap each other and make a continuous seal around a circle disc. They pivot on one point and are moved by a lever that moves 90 degrees to the normal. Each strip of metal shutter moves in a slot to guide the movement around this disc to open and close as a human iris or camera shutter iris operates. Spacing may be included between each strip to eliminate rubbing, friction or outgassing problems when depositing films onto the iris shutter directly. A plan view of the shutter is shown in Fig.