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US 4,669,841 AGranted
Rotary shutter
AssigneeFuji Photo Optical Co., Ltd.
InventorsKouji Kaneko, Motohiko Horio, Naoki Kobayashi, Fujio Okada
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AssigneeFuji Photo Optical Co., Ltd.
InventorsKouji Kaneko, Motohiko Horio, Naoki Kobayashi, Fujio Okada
Estimating the term…
A rotary shutter adapted to be used in an electronic still camera comprises a rotatable shutter having shutter openings which are variable in size. The shutter is rotated by an electric motor in order to open and close intermittently an exposure aperture of the camera. A phase detector for detecting the phase of rotation of the shutter member provides a series of phase signal, and cooperates with a signal generator for generating stop signals in synchronism with the phase signals when a particular shutter speed is selected and a circuit for braking the motor to stop the shutter member. Responsive to the particular shutter speed selecting operation, the shutter opening is opened to its maximum size and the rotary shutter is simultaneously stopped quickly in position so as to open fully the exposure aperture of the camera.
A rotary shutter for use in an electronic still camera having an exposure aperture, said shutter comprising a rotatable element having a circlar array of openings designed to be variable in size, said rotary shutter further comprising;
A rotary shutter for use in an electronic still camera having an exposure aperture, said shutter comprising two axially superposed rotatable shutter blades, each said blade having a circular array of openings, and means to displace angularly said two superposed shutter blades relative to each other for varying the size of shutter openings defined by adjacent superposed pairs of said openings of said shutter blades, said rotary shutter further comprising:
Dependencies are inferred from the claim text.