Large-aperture focal plane shutter

Abstract

Described is a compact focal plane shutter system adapted for large-format exposure shutters. The focal plane shutter includes at least one multi-segmented screen having multiple rigid blades. Each blade can be moved at a different velocity. By using multiple blades, the rotational inertia about a drive axis can be reduced compared to a conventional single screen shutter system, thus a greater acceleration can be achieved with the same amount of torque about the drive axis. Using smaller blades allows for greater acceleration, resulting in faster shutter speeds to support a wider range of applications. Additionally, the overlap between blades of a multi-segmented screen in an open position is greater than the overlap of the blades in a closed position, providing a compact system. A drive mechanism linearly translates the blades of the multi-segmented screen between the open and closed positions.

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