Patent ID: 6407873
Filing Date: 2002-06-18
Classification: G02B

Abstract:
A safety shutter suitable for intercepting an energy beam, the safety shutter comprising:a first shutter blade having a top end and a bottom end; a second shutter blade having a top end and a bottom end; a first motor coupled with the bottom end of the first shutter blade, the first motor rotating the first shutter blade in a clockwise direction when the shutter is energized; a second motor proximate the first motor and coupled with the bottom end of the second shutter blade, the second motor rotating the second shutter blade in a counterclockwise direction when the shutter is energized such that an aperture is formed between the first shutter blade and the second shutter blade when the shutter is energized; a first spring coupled with the first shutter blade, wherein the first spring rotates the first shutter blade in a counterclockwise direction when the shutter is de-energized; and a second spring coupled with the second shutter blade, wherein the second spring rotates the second shutter blade in a clockwise direction when the shutter is de-energized such that the aperture is closed when the shutter is de-energized.