Abstract: An aperture unit (20) comprises an aperture cover (22), an aperture base (27), and a light shielding portion (24). The aperture cover (22) has an opening (22a) through which light passes. The aperture base (27) is disposed on the downstream side of the aperture cover (22) in the light incidence direction, and has an opening (27a) through which light passes. The light shielding portion (24) is disposed between the aperture cover (22) and the aperture base (27), and has an opening (24d) through which the light that passed through the opening (22a) passes, and a plurality of opaque aperture stop blades (24a, 24b, 24c) that are formed from a polyimide resin and vary the size of the opening (24d).

Abstract: A shutter apparatus includes a blade member, a blade moving member, a locking member, a cam member, and a restriction member. The cam member moves the locking member from the locking position to the non-locking position so that the blade moving member moves from the closing position to the opening position. The restriction member moves from the non-restriction position to the restriction position after the blade moving member moves from the closing position to the opening position. The cam member moves the locking member in a direction opposite to a direction from the non-locking position to the locking position so that the locking member moves the restriction member from the restriction position to the non-restriction position.

Abstract: An electromechanical shutter device comprising a base member and a shutter assembly comprising: an electrical current source member; a shutter member movable between a light beam blocked position and a light beam passed position; a light beam blocking member associated with the shutter member; a shutter coil associated with the shutter member which generates an electromagnetic force when energized; at least one magnet which generates a magnet flux directed towards and intersecting the shutter coil; electrically conductive means connecting the electrical current source member to the shutter member for passing electrical current to energize the shutter coil and to control movement of the shutter member between the light beam blocked and passed positions; wherein when the shutter coil is energized, an electromagnetic force is generated that interacts with the magnetic flux to thereby cause movement of the shutter member between the light beam blocked and light beam passed positions.

Abstract: A focal plane shutter for digital cameras includes a first driving member for a first blade and a second driving member for the first blade, mounted to the same shank; arms for the first blade on which a set spring is hooked; and a set member for restraining the first driving member for the first blade in the proximity of the position where the exposure operation is completed, at a set position by rotating a restraining member, and actuating the first driving member for the first blade to the starting position of the exposure operation in the restoration to the initial position immediately after the release.

Abstract: In an image pickup apparatus comprising an optical finder for optically displaying an object image, an image pickup device for receiving the object image and converting it into an image signal for photographing, an electronic finder for displaying the object image received by the image pickup device on the basis of the image signal converted by the image pickup device, a focal plane shutter for shielding the image pickup device from light, and a beam guide device for guiding a beam from the object to the optical finder and the image pickup device, and a control method and a control program applied to the image pickup apparatus, the beam from the object guided by the beam guide device is changed over from the optical finder to the image pickup device and the focal plane shutter is rendered into its opened state so that before photographing, the image pickup device can receive the object image displayed by the electronic finder.

Abstract: A light-shielding blade material is provided that contributes to increased focal plane shutter speeds. A focal plane shutter has a front blade group and a rear blade group, each being composed of a plurality of light-shielding blades. At least one of these light-shielding blades is made of a Be-Al alloy material containing 40% by weight or more of Be, and has a thickness of 40 to 150 microns. This light-shielding blade is light in weight and high in stiffness, thereby significantly contributing the increased focal plane shutter speeds.

Abstract: Device for preventing entrance of backlight into an optical view finder for preventing degradation of an image, including a zoom lens part for adjusting a size and angle of an image signal of an objective in planning a picture frame, a mirror shutter part capable of opening and closing for sending the image signal processed in, and received from the zoom lens part to a first optical axis and a second optical axis, an image forming CCD part disposed at an image forming plane of the image signal of the zoom lens part on the first optical axis for converting the image formed on the first optical axis into an electric signal for applying the electric signal to a display or a recording medium, and an optical view finder part disposed on the second optical axis for adjusting a magnification of the image signal on the second optical axis by means of an internal optical system for being observed by an observer's eye.

Abstract: An extremely durable, super-high speed shutter with speeds of 1/8000 second or faster advantageously increases the blade acceptance rate, reduces the cost, prevents abnormalities such as light leaking between the curtains and the like, contributes to the implementation of a super-high speed shutter with speeds exceeding 1/8000 of a second, corresponding to TTL multi-pattern light adjustment, and the like. The shutter includes a front curtain and a rear curtain each including a plurality of dividing blades; and at least one of the dividing blades among the front curtain and the rear curtain that is positioned on the photo lens side is formed from a black material having at least one uncoated surface.

Abstract: A shutter device comprises a shutter blade which operates according to an exposure operation, a first blade driving spring for giving an urging force working in a predetermined direction to the shutter blade substantially over an entire operating range of the shutter blade, a second blade driving spring for giving the shutter blade an urging force working in the same direction as the first blade driving spring, and a charging mechanism for charging the first blade driving spring and the second blade driving spring. Since the charging mechanism includes a first charging member which travels to charge the first blade driving spring and a second charging member which travels to charge the second blade driving spring, the timings of charging the respective springs and the torques required to charge the respective springs can be optimally set.

Abstract: A mechanism wherein the operation state of a shutter is detectable even with a diaphragm plate, without light shading blades being damaged, is disclosed. The mechanism includes a substrate, a cover plate, and a light blocking blade between the substrate and the cover plate. A diaphragm plate is between the light blocking blade and the substrate or the cover plate. A traveling state detection device uses detection holes to detect the traveling state of the light shading blade at a position corresponding to the traveling state detection device of the diaphragm plate.