Large-aperture focal plane shutter

Details Large-aperture focal plane shutter Large-aperture focal plane shutter

2006-12-11

2009-10-20

Koval, Melissa J (Department: 2862)

Photography

Camera detail

Shutter

C396S487000, C396S489000

Reexamination Certificate

active

07604422

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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Simultaneous Multichannel Photometry with BUSCA, Oliver-Mark Cordes, Sep. 13, 2004, relevant portions. Entire document avalible from The University of Bonn online electronic publication of dissertations at http://hss.ulb.uni-bonn.de/diss—online/.
International Search Report for PCT/US2007/084924 dated Sep. 29, 2008; 2 pages.

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