Abstract: An optical axis adjusting device for adjusting an eccentricity of an adjusting lens group of the lens system with respect to a fixed lens group of the lens system, by moving the adjusting lens group in a direction orthogonal to an optical axis of the fixed lens group, includes an adjusting lens group support member movable in a direction orthogonal to the optical axis of the fixed lens group, and a resilient cylindrical chuck made of a resilient material which is provided with the adjusting lens group support member, the resilient cylindrical chuck having a lens holding portion which is formed at an open end of the resilient cylindrical chuck so as to surround and resiliently hold the adjusting lens group.

Abstract: A mounting structure includes a fixing plate to which an image pick-up device is fixed; screw holes formed on a supporting member; a first female threaded portion and a second female threaded portion having a smaller diameter than the first female threaded portion, formed in each screw hole; cylindrical adjustment members which are screwed into the screw holes, respectively, and are rotatable to adjust the axial position thereof; and set screws which are rotatably inserted through the fixing plate and respective axial holes of the cylindrical adjustment members to be engaged with the second female threaded portions of the screw holes to hold the fixing plate between each head portion of the set screws and each cylindrical adjustment member, respectively.

Abstract: A lens frame structure for optical axis adjustment includes a first frame having a central opening and a first reference surface normal to an optical axis, a second frame supporting a lens group to be aligned with the central opening, the second frame having a radial flange which has a second reference surface normal to the optical axis and contacting the first reference surface so that the second frame is movable in a direction normal to the optical axis, and a plurality of cutout portions formed on the radial flange, wherein an adhesive is inserted into each of the plurality of cutout portions to bond the second frame to the first frame.

Abstract: A mounting structure includes a fixing plate to which an image pick-up device is fixed; screw holes formed on a supporting member; a first female threaded portion and a second female threaded portion having a smaller diameter than the first female threaded portion, formed in each screw hole; cylindrical adjustment members which are screwed into the screw holes, respectively, and are rotatable to adjust the axial position thereof; and set screws which are rotatably inserted through the fixing plate and respective axial holes of the cylindrical adjustment members to be engaged with the second female threaded portions of the screw holes to hold the fixing plate between each head portion of the set screws and each cylindrical adjustment member, respectively.

Abstract: An optical axis adjusting device includes a holding device which holds an adjusting lens group; an adjusting device for moving the holding device in a direction orthogonal to the optical axis of a fixed lens group; a light source for emitting light toward the fixed lens group and the adjusting lens group; a transmission chart having a contrast detection pattern(s); an image pick-up device; a moving device for moving the image pick-up device in the optical axis direction; a controller for controlling the moving device so that the light which is emitted by the light source to be passed through the contrast detection pattern(s), the fixed lens group and the adjusting lens group is focused on the image pick-up device; a processor for calculating a contrast value of an image focused on the image pick-up device; and an indicating device which indicates the calculated contrast value.

Abstract: An optical axis adjusting device for adjusting an eccentricity of an adjusting lens group of the lens system with respect to a fixed lens group of the lens system, by moving the adjusting lens group in a direction orthogonal to an optical axis of the fixed lens group, includes an adjusting lens group support member movable in a direction orthogonal to the optical axis of the fixed lens group, and a resilient cylindrical chuck made of a resilient material which is provided with the adjusting lens group support member, the resilient cylindrical chuck having a lens holding portion which is formed at an open end of the resilient cylindrical chuck so as to surround and resiliently hold the adjusting lens group.

Abstract: A lens frame structure for optical axis adjustment includes a first frame having a central opening and a first reference surface normal to an optical axis, a second frame supporting a lens group to be aligned with the central opening, the second frame having a radial flange which has a second reference surface normal to the optical axis and contacting the first reference surface so that the second frame is movable in a direction normal to the optical axis, and a plurality of cutout portions formed on the radial flange, wherein an adhesive is inserted into each of the plurality of cutout portions to bond the second frame to the first frame.

Abstract: A lens position adjusting method for a zoom lens includes at least two movable lens groups, one lens group being primarily utilized for focusing and the other lens group being primarily utilized for magnification, wherein an object at a predetermined distance is in-focus when each movable lens group is positioned at each of respective initialized positions thereof with the zoom lens being set at a first focal length, and wherein each movable lens group is moved to vary magnification in accordance with a moving amount from the initialized positions of the movable lens groups.

Abstract: An auto-focusing device of a camera includes a photographic lens having a focusing lens group guided along an optical axis, a stepping motor for moving the focusing lens group along the optical axis to bring an object into focus; and a controller for controlling the stepping motor to rotate stepwise when the depth of focus is smaller than a predetermined value and for controlling the stepping motor to rotate the rotor by even-numbered steps when the depth of focus of the photographic lens is greater than the predetermined value.

Abstract: A stepping motor driving apparatus for a camera includes 1-2 phase excitation type stepping motors and a drive controller for driving and stopping the stepping motors so that the driven stepping motors are stopped always at a detent position.

Abstract: A stepping motor driving apparatus for a camera having a 1-2 phase excitation type stepping motor which is driven by a 1-2 phase excitation in response to a drive signal includes a drive control device for stopping the stepping motor at a 1-phase excitation position by de-energizing the stepping motor at the 1-phase excitation position and for stopping the stepping motor at a 2-phase excitation position while maintaining the excitation in a high precision drive control in which the stepping motor is driven at high precision. The drive control device stops the stepping motor by de-energizing the stepping motor always at the 1-phase excitation position in a normal drive control in which no precise drive control of the stepping motor is needed.

Abstract: A time-sharing drive apparatus for a camera having a plurality of motors includes a motor drive control system which alternately drives the motors in a time-sharing control. When the camera includes a zoom lens provided with a first stationary lens group, a second movable lens group and a third movable lens group, the motors are composed of a first motor which opens and closes a diaphragm of the zoom lens, a second motor which moves the second lens group, and a third motor which drives the third lens group. The motor drive control system which drives the first, second and third motors is controlled via a time-sharing system.

Abstract: An automatic dynamic balance adjusting apparatus is provided that adjusts the dynamic balance of a rotating body on a workpiece. The dynamic balance adjusting apparatus includes a control unit, a turntable for carrying the workpiece along a predetermined path, and a plurality of stations, arranged along the path, at which processes are performed on the workpiece. The stations include a measurement station at which the dynamic balance of the rotating body is determined, a dispenser station at which the application of a balance-weight agent is performed to adjust the dynamic balance of the rotating body, and an inspection station at which the dynamic balance of the rotating body is checked.

Abstract: An automatic focusing apparatus of a camera includes a photographing lens having a focusing lens group and a focus control mechanism which moves the focusing lens group to a hyper-focal distance position when no effective object distance is obtained.

Abstract: A drive apparatus for a zoom lens barrel having at least two movable zooming lens groups which are moved upon zooming, comprising: two lens frames which support the movable zooming lens groups, two cam pins integral with the lens frames and extending in the same direction, two parallel rotatable drive plates which are provided with cam grooves in which the cam pins are fitted, and two drive units which drive the respective drive plates upon zooming. The cam profile of the cam grooves of the drive plates is such that the movable zooming lens groups are moved in predetermined directions by the rotation of the drive plates during zooming.

Abstract: A drive apparatus for a zoom lens barrel having a plurality of movable lens groups, comprising: a lens barrel body which supports lens frames of the movable lens groups to move linearly in the optical axis direction, a lens drive unit which is assembled independently of the lens barrel body, driven pins provided on the lens frames and projecting outward from the barrel body in the same direction, and a plurality of drive members having engaging portions engageable with the driven pins. The drive motor which independently drives the drive members and drive gears connects the drive members to the drive motor, is provided in said lens drive unit. The lens drive unit is secured to the lens barrel body in a state that the driven pins projecting from the lens barrel body are engaged by the engaging portions of the corresponding drive members of the lens drive unit.

Abstract: A motor-driven diaphragm apparatus for a lens barrel having a plurality of lens groups and a diaphragm mechanism, in which a diaphragm block provided with a plurality of diaphragm blades and a diaphragm-opening-and-closing ring which opens and closes an aperture defined by the diaphragm blades, is integrally provided with a diaphragm-opening-and-closing arm that projects from the diaphragm block and that is provided with a radial association groove for the diaphragm-opening-and-closing ring. Also provided are front and rear lens barrel blocks which support the lens groups, wherein said diaphragm block is held between the front and rear lens barrel blocks so that the diaphragm-opening-and-closing arm and the association groove project outwardly.

Abstract: A drive apparatus for a zoom lens barrel having at least two movable lens groups, one of which is used also as a focusing lens group comprising: a pair of lens frames which respectively hold the two movable lens groups, a pair of driven pins which are integrally provided on the lens a drive cam plate which is provided with a pair of cam surfaces which engage with the corresponding driven pins and which is rotatable about an axis, a rack plate which is supported to move in the optical axis direction of the movable lens groups and which is provided with an engaging portion which engages with the driven pin of the movable lens group that is used also as a focusing lens group, a first drive mechanism which includes a first motor for swinging the drive cam plate in the forward and reverse directions, and a second drive mechanism which includes a second motor for moving the rack plate without having an influence on the angular position of the drive cam plate.

Abstract: A drive apparatus for a zoom lens barrel, in which at least two movable zooming lens groups are moved upon zooming, includes lens frames which respectively hold the two movable zooming lens groups, two parallel drive plates which are provided with cam grooves and which are pivoted to a common shaft to move the two movable zooming lens groups, a pair of drive gears which are in mesh with corresponding sector gears of the drive plates, and two drive mechanisms which individually drive the drive gears upon zooming.

Abstract: A drive apparatus for a zoom lens barrel having at least two movable lens groups, one of which is used also as a focusing lens group, comprising a pair of lens frames which respectively hold the two movable lens groups, a pair of driven pins which are integrally provided on the lens frames, a drive cam plate which is provided with a pair of cam surfaces which engage with the corresponding driven pins and which is rotatable about an axis, a drive mechanism which includes a motor for driving the drive cam plate, and a detection mechanism which detects the angular position of the drive cam plate. One of the cam surfaces that corresponds to the movable lens group, other than the focusing lens group, is defined by a stepped cam surface having discrete sections which are adapted to set the focal length discretely, so that no movement of the movable lens group takes place in the range of the angular position of the drive cam plate corresponding to the discrete sections.