Abstract: A transmission mechanism includes an output member and a worm wheel shaft configured to be connected to a power device to transmit a power of the power device to the output member. The worm wheel shaft and the output member are engaged with each other through a relative movement along an axial direction. An engagement between the worm wheel shaft and the output member limits a relative rotation between the worm wheel shaft and the output member.

Abstract: A focus control device is adapted to adjust a camera lens. The device comprises a rotational input device (1), a variable gear ratio means (10) and a rotational output means so coupled to communicate a first rotational movement applied to said rotational input device to said variable gear ratio means (10) and to communicate a second rotational movement from said variable gear ratio means (10) to said rotational output means. The variable gear ratio means provides a variable adjustment of the angular velocity of said second rotational movement relative to the angular velocity of said first rotational movement.

Abstract: A method for adjusting the picture definition on the camera lens of a motion picture camera. A drive unit is connected to the camera lens which is driven, in the manual focusing operation, by an picture definition handwheel of an operating unit, which displays the adjusted picture definition on a scale dial, and, in the automatic focusing operation, by an auto-focusing device for measuring the distance from an object to be recorded by the motion picture camera and outputting control signals to an electromechanical actuator, which is connected to the picture definition handwheel or to the scale dial of the operating unit, for adjusting or readjusting the picture definition adjusted on the picture definition handwheel or displayed on the scale dial as a function of the distance measured from the object to be recorded.

Abstract: A digital camera equipped with a projector, includes a photographing device; a projector device that projects an optical image; a mode switching operation member that outputs a switching operation signal indicating a changeover to one of a photographing operation mode in which image data photographed by the photographing device are saved as a photographic image file in a recording medium and a projection operation mode in which a reproduced image is projected by the projector device; a top surface operation member disposed at an upper surface of a casing; and a projection control device that controls the projector device based upon an operation signal provided by the top surface operation member upon receiving a switching operation signal indicating a changeover to the projection operation mode from the mode switching operation member.

Abstract: To provide a camera that is suited to shoot both a demagnified image and a magnified image. The camera includes a housing body 11 containing a CCD 15, and a lens barrel 12. An abutted member 20 having an objective lens 40 therein is engaged with the lens barrel 12 and a rotatable manually-controlled member 30 is fitted around that lens barrel. The abutted member 20 moves back and forth in the direction of an optical axis K in response to the rotation of the manually-controlled member 30. A user moves the objective lens 40 back and forth by moving the abutted member 20 back and forth to shoot either a demagnified image or a magnified image. A demagnified image is photographed with the abutted member 20 contained in the lens barrel 12. A magnified image is photographed with the abutted member 20 projected from the lens barrel 12. An end of the abutted member 20 is positioned so that the focal point of the objective lens 40 falls on the center thereof.

Abstract: An objective for a movie camera for digital cinematography comprises a cylindrical main barrel with a bayonet or K mount, an inner tube, fixed optical elements, adjustable optical sliding elements and drive rings with scales for adjusting the optical sliding elements that are mounted rotatably in the axial direction on the main barrel. The objective also comprises an iris diaphragm with a diaphragm ring rotating on the main barrel, an internal focusing system and a back focus correction device. The inner tube is mounted on the main barrel in a fashion displaceable along the optical axis for the purpose of back focus correction by means of the back focus correction device. The fixed optical elements, the iris diaphragm and sliding holders for holding the adjustable optical sliding elements are inserted into the inner tube.

Abstract: A device for focusing a film picture in a movie film camera with a camera housing which has a lens carrier 5 for holding a camera lens, with a camera end which forms a lens plane, and a film window where a film is moved along in an image plane by means of a film transport device. A device for changing the distance between the lens plane and the image plane is provided.

Abstract: A focus indicator system for a motion picture camera has video cameras mounted on opposite sides of the motion picture camera. Images produced by the video cameras are superimposed on the screen of a monitor. The video cameras are rotatable, and rotate in responses to changes in the focus of the lens. Movements of the lens' focus ring are detected by a transducer. A control circuit monitors the output from the transducer and operates a motor, which rotates the video cameras in opposite senses. The optical axes of the video cameras cross in the plane in which the lens is focused. The person operating as first assistant camera can determine when the motion picture camera is in focus by viewing the monitor. When an object is in focus, the superimposed images from the video cameras coincide. When the object is not in focus the superimposed images are separated. The focus indicator helps the person who is focussing the camera to rapidly and accurately focus on objects in the camera's field of view.

Abstract: Two cam pins of the variable magnification lens group and the aberration correction lens group are guided by two side walls of one cam groove. Thus, two cam grooves can deal with three movable lens groups, and there is no need to provide three cam grooves. Consequently, the cam cylinder can be short, and thereby the zoom lens apparatus can be compact. A spring applies force to the two cam pins to separate from one another, so that the cam pins can be pressed against the side walls.

Abstract: The device permits swing, shift, tilt and rise-and-fall movements between a lens and a motion-picture camera to manipulate focal relations and image shapes. Preferably the device rests on rails (called "iris rods") of a balance plate or base--secured under the camera--or some other track, similarly mounted. If so, the device has a first intermediary element preferably mounted to slide fore-and-aft on the track relative to the camera; and other intermediary elements mounted in a sequence preferably from the first element for translation and rotation relative to that element--ending in a lens-board mount for mounting a lens. Also in balance-plate mounting the device preferably includes a bellows whose front end joins the lens-board mount and whose rear end holds an adapter to engage the camera lens port. Preferably the device has a yoke (preferably flat and rearward-extending) for, e.g.

Abstract: A television camera support for mounting and providing optical alignment between the imaging axes of a lens and an image pickup apparatus. The support is of single-piece construction and generally "L" shaped and includes a vertical portion adapted to receive the camera lens and a horizontal portion adapted to receive the image pickup apparatus. In a preferred embodiment, only the vertical portion of the support is attached to the body of the television camera and the structural rigidity of the camera body near the point of attachment is less than the rigidity of the support, thereby minimizing misalignment of the imaging axes if excessive forces are accidentally applied to the lens.

Abstract: There is disclosed herein a method and an apparatus which provide a tactile indication of the occurrence of a particular event, such as during the operation of a photographic camera, to provide an indication to the operator that a proper exposure condition, like proper focus, aperture or shutter speed, has occurred. For example, and as particularly shown and described herein, a photographic camera includes an autofocus sensing system which senses when a focusing device, such as the focusing ring, of the camera lens has been adjusted for proper focus. When this focus event occurs, an electromagnet operates a brake to prevent the lens focusing device from being turned or operated further, at least momentarily, to thereby provide to the camera operator a tactile indication that the proper focus has been achieved. The electromagnet can be associated with the camera body to engage the focusing device of the lens, or it can be in or within the lens assembly.

Abstract: A lens system is disclosed herein having a pair of telescoping tubes coaxially related to each other so that their central axes are coextensive. A selected one of the tubes carries a collimating lens while the other tube carries a reticle and a diffusing glass. A locking set screw fixes the pair of tubes in an optically correct relationship to each other. A mounting flange is threadably attached to the end of the lens tube opposite to its end in telescoping or sliding relationship with the reticle tube so that the lens unit may be detachable carried on a selected camera lens or camera.

Abstract: In an automatic focus detecting device in which a vibrating prism is provided on the focal plane of an objective of an optical instrument such as a camera, a photodetector element used for detecting focus is composed of a central element functioning as a main photodetector and a marginal element or elements functioning as a sub-photodetector. The marginal element detects the vibration of the image of a non-principal subject matter existing in the vicinity of a principal subject matter. The central element detects the vibration of the image of the principal subject matter. The output of the marginal element is used to compensate for the noise in the output of the central element.

Abstract: In an optical instrument like photographic cameras, a light refracting optical element such as a prism having different parts effecting refraction in different directions is located substantially on an image plane of the objective of the optical instrument and periodically moved in the plane to bring the different parts to a point on the plane periodically. When the image formed on the plane is just focused on the light refracting optical element, the image viewed from behind stands still. When the image formed on the plane is out of focus, that is the image is not focused precisely on the light refracting optical element, the image viewed from behind periodically moves.