Abstract: An optical apparatus according to the present invention includes a cylindrical holding barrel, a plurality of moving lens frames which are held in the holding barrel such that the moving lens frames are moved back and forth in an optical axis direction, and a cam cylinder fitted on an outer surface of the holding barrel so as to move the moving lens frames. The cam cylinder slides and rotates on the outer surface of the holding barrel, and includes a first cam cylinder and a second cam cylinder each having a cam section on an inner surface thereof, and one end face of the first cam cylinder and one end face of the second cam cylinder are coupled to each other such that the first and second cam cylinders are rotated together.

Abstract: An optical apparatus according to the present invention includes a moving lens frame guided movably in an optical axis direction by guide shafts, a drive source for driving the lens frame along the optical axis direction, a lead screw attached to the drive source, a nut member which is fitted on the lead screw and whose rotation is controlled by a rotation control section, the nut member moving only in the optical axis direction by rotation of the lead screw, and an urging spring for pressing part of the lens frame on the nut member such that the lens frame follows movement of the nut member. The lead screw has a top end portion and a bottom end portion each of which is a non-screw portion having a diameter smaller than that of a root of a screw portion of the lead screw, and a spring is fitted near the bottom end portion of the lead screw to urge the nut member, which is fitted in the bottom end portion, in such a manner that the nut member is pushed in a direction of the top end portion of the screw.

Abstract: An optical apparatus according to the present invention includes a cylindrical holding barrel, a lens moving mechanism including a cylindrical cam which is rotatably fitted on an outer surface of the holding barrel in such a manner that a plurality of moving lens frames held in the holding barrel are moved in an optical axis direction, a light quantity adjusting mechanism held in the holding barrel, for adjusting a quantity of light passing therethrough, lens moving mechanism driving sources for driving the lens moving mechanism, and light quantity adjusting mechanism driving sources for driving the light quantity adjusting mechanism. The lens moving mechanism driving sources and the light quantity adjusting mechanism driving sources are held in the holding barrel.

Abstract: In a design supporting system, projected shape information of a part, for example, solid model definition drawing is input from a shape inputting section based on the drawing formation on the CAD, shape attribute information thereof is input from a shape attribute inputting section, and the projected shape information and shape attribute information are combined and stored in an input information storing section. Further, a 3-dimensional CAD solid model creation command group includes a plurality of 3-dimensional CAD drawing modules used for converting the projected shape information into 3-dimensional information. A control section creates a 3-dimensional CAD solid model by controlling the 3-dimensional CAD drawing modules of the 3-dimensional CAD solid model according to the projected shape information and shape attribute information stored in the storage section.

Abstract: A shading device of a camera having shading bellows which is collapsible in interlocking motion with an imaging-lens barrel movable in the direction of its optical axis and which is provided between the front side of the aperture of a camera body and the imaging-lens barrel, wherein the relationship L1/L0<L0/L2 holds where L0 represents the free length of the shading bellows when it is formed, L1 represents the maximum length of the shading means expanded in the direction of the optical axis and L2 represents the minimum length of the shading means contracted in the direction of the optical axis.

Abstract: An automatic focusing camera includes a first distance measurement circuit for measuring a first distance to an object located at a central portion of a frame, a second distance measurement circuit for measuring a plurality of second distances to other objects located at a peripheral portion of the frame, a CPU for comparing the first and second distance with a shortest photographing distance of the camera, for, when the first distance is shorter than the shortest photographing distance, selecting the shortest photographing distance as an object distance regardless of the second distance, for, when the first distance is not shorter than the shortest photographing distance and the second distance is shorter than the shortest photographing distance, selecting the first distance as the object distance, and for, when the first and second distances are not shorter than the shortest photographing distance, selecting a shorter one of the first and second distances as the object distance, and a mechanism for focusing

Abstract: A camera having a red-eye alarm device which receives a signal representative of a distance l between an object to be photographed and a camera, the focal length f of a taking lens, a signal representative of a distance d between the optical axis of the taking lens and the center of an electronic flash discharge tube, and develops an alarm signal based upon the object distance l, the focal length f and the spacing d, the red-eye alarm signal being developed when a conditional formula ##EQU1## is satisfied.

Abstract: A camera includes a photographic optical system movable along its optical axis, and a cam ring rotatable about the optical axis of the optical system. When it is rotated by a motor, the cam ring moves the optical system to change the focal length thereof. Arranged at the outside of the cam ring are a viewfinder optical system, whose optical axis is parallel to that of the photographic optical system, and a strobe mechanism movable in a direction parallel to the optical axis of the photographic optical system. First and second cam portions are arranged on the cam ring and engage the viewfinder optical system and strobe mechanism, respectively, so as to move them along the optical axis of the photographic optical system, in association with the rotation of the cam ring.

Abstract: A camera of the automatic aperture control type permits stop-down means which operates a diaphragm in cooperation with a shutter release operation first to move forward from a first position corresponding to the open aperture to a second position corresponding to a minimum aperture and then to move back from the second position toward the first position. The camera includes storage means for storing a position occupied by the stop-down means when the diaphragm assumes a proper aperture while the stop-down means moves from the first position to the second position so that the stop-down means is stopped at the stored position while the stop-down means moves back from the second position toward the first position.