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| Number | Title | Issue Date |
| 5067802 | Lens movement control device for zoom lens A zoom lens comprises a varifocal lens section having a variator lens unit for varying the focal length of the entire system and a compensator lens unit for compensating for the image shift with zooming movement of the variator lens unit, a relay lens sec... | 11/26/1991 |
| 5060001 | Optical apparatus An optical apparatus comprises a first lens for effecting magnification change, a second lens provided more adjacent to the focal plane than the first lens for effecting focusing and correction during the magnification change, driving means for moving the... | 10/22/1991 |
| 5005956 | Lens position control device A position control device for a lens system having a variator and a compensator the latter of which also serves as the focusing lens, includes apparatus for detecting the positions of the variator and compensator, circuitry for detecting the focus state, ... | 04/09/1991 |
| 4991944 | Zoom lens driving apparatus A zoom lens driving apparatus always detects a position of an image magnification varying lens section, and drives the image magnification varying lens section in accordance with a preset relationship between the position of the image magnification varyin... | 02/12/1991 |
| 4925282 | Zoom lens assembly A zoom lens assembly comprises a photo-taking optical system having a focusing portion, a zooming portion, and an optic axis, a manual operator movable in the direction of the optic axis for zooming and rotatable about the optic axis for focusing, an elec... | 05/15/1990 |
| 4881799 | Varifocal lens device Compensation of a deviation produced in the image forming position of a varifocal lens in consequence of magnification is attained by transforming a compensation amount into a relative amount of movement through arithmetic operation and driving the focusi... | 11/21/1989 |
| 4868592 | Automatic focusing device Disclosed here is an automatic focusing device high in focusing accuracy, in which an amount of drive for driving a focusing lens to a position focused on an object can be renewed during the focusing lens moving to the focused position.... | 09/19/1989 |
| 4861146 | Variable focal lens device A variable focal lens device having an optical system comprising a variable power lens group and a focusing lens group disposed on one identical optical axis in which a deviation of a focusing position is resulted with an identical object when the focusin... | 08/29/1989 |
| 4842387 | Automatic focusing apparatus for use in video camera and the like An automatic focusing apparatus for use in a video camera and the like wherein one optical element other than a focusing lens means of an optical system is moved for focusing in the in-focus direction while being vibrated slightly by means of a motor capa... | 06/27/1989 |
| 4820028 | Zoom lens with a variable refractive index element A zoom lens having a plurality of lens units at least one of which includes a variable refractive index element for zooming and focusing purpose. The refractive index of the variable refractive index element of the zoom lens is varied by an output from an... | 04/11/1989 |
| 4763999 | Zoom lens assembly In a zoom lens assembly, an objective lens is changed in focal length by moving first and second lens groups relative to each other and is focused by moving the first lens group relative to the second lens group. A zooming cam has respective camming surfa... | 08/16/1988 |
| 4763174 | Magnification selecting device in a photocopier A magnification selecting device which is capable of continuously varying magnifications by operating either UP or DOWN key and also slowing down the speed of varying mangifications only when these magnifications are in a position close to the predetermin... | 08/09/1988 |
| 4749268 | Autofocusing zoom lens An automatic focusing zoom lens which comprises a first positive group, a second variator group, a third compensator group, and a relay lens including an autofocus detector which receives a portion of the light entering the fourth group and controls a mot... | 06/07/1988 |
| 4735494 | Zoom lens control system and method for zooming control The present invention user plural driving speeds of the focusing lens component of a zoom lens which responds to plural separate control regions of focal length and object position. In each control region, the focusing lens component is driven in predeter... | 04/05/1988 |
| 4694151 | Autofocusing zoom lens system with beam splitter prism for single lens reflex cameras An autofocusing zoom lens, comprising a half-mirror prism and a sensor capable of detecting light in conjunction with the half-mirror prism, is formed by inserting the half-mirror prism between the front-lens and rear-lens groups of the master-lens groups... | 09/15/1987 |
| 4639083 | Lens mounting A lens mounting including a distance adjusting ring responsive to a signal representing the object to an in-focus position, and provided with an intermediate stopper retractable from an intermediate point in the range of rotation of the aforesaid distance... | 01/27/1987 |
| 4621906 | Auto-focus zoom lens assembly A zoom lens assembly with an auto-focus function includes first and second lens groups, and a control device for causing a drive mechanism to rotate a distance-presetting ring which moves one of the lens groups, to adjust a focus in accordance with a sign... | 11/11/1986 |
| 4609260 | Automatic focusing apparatus for zoom lens The disclosed zoom lens apparatus operates in a manual focusing mode and an automatic focusing mode with a manual focusing movement imparted to one lens component and an automatic focusing movement imparted to another lens component. In the automatic focu... | 09/02/1986 |
| 4541695 | Zoom lens for cameras A camera zoom lens system comprising; means for generating and storing a first information signal representing a predetermined position of the first movable lens group, means for generating a second information signal whose value determines a relationship... | 09/17/1985 |
| 4493534 | Focus adjusting device for camera having varifocal optical system A focus adjusting device for a camera having a varifocal optical system includes a pivotal member having a focusing guiding slot. The pivotal member is movable about a fixed pivot on the camera body. A guide pin fits in the guiding slot of the pivotal mem... | 01/15/1985 |
| 4491396 | Automatic focusing zoom lens mounting This invention concerns with the technique of controlling axial movement of a focusing member in the objective lens system based on the signal representing the object distance from the automatic distance measuring means. More particularly, as the provisio... | 01/01/1985 |
| 4488039 | Imaging system having vari-focal lens for use in endoscope An imaging system for use in an endoscope includes a vari-focal lens system provided in a viewing head to be inserted into a cavity or opening of a living body or machinery, a solid-state image sensor for imaging an image formed by the lens system to prod... | 12/11/1984 |
| 4472033 | Zoom lens having an automatic focus detecting device A zoom lens provided with a first group lens having a negative power and a second group lens having a positive power, the first group lens being moved in the direction of the optical axis for focus adjustment, the first group lens and the second group len... | 09/18/1984 |
| 4461544 | Autofocusing lens mounting Axial movement of a focusing lens holder is controlled by an output signal of automatic distance measuring means for automatically finding the distance from the means to an object. A lens mounting is selectively operable either by the drive control of the... | 07/24/1984 |
| 4235509 | Electrically driven optical instrument with manual drive An electrically driven optical instrument such as stereo-microscope is provided with a transfer shaft rotatably carrying a drive transmitting, transfer gear. An axial displacement of the transfer gear occurs in response to an external operation to move th... | 11/25/1980 |
| 4198129 | Varifocal lens system with three moving components An optical objective of variable focal length comprises a varifocal front lens group consisting of at least four components of alternating refractivity, namely a stationary negative first component, a movable positive second component, a movable negative ... | 04/15/1980 |
| 4156933 | Ratio preserving control system A ratio preserving method and apparatus for a system having a plurality of operating values, each independently changeable over a prescribed quantity range by a change in a separate control input by selectively interconnecting the separate control inputs ... | 05/29/1979 |
| 4083057 | Focus size compensation A zoom lens system is shown for use in conjunction with the normal optical elements of an automatic focusing camera to correct the change in magnification which occurs when a lens system focused on a far subject is refocused on a nearer subject or vice ve... | 04/04/1978 |
| 4002405 | Variable speed control for zooming A variable speed drive for controlling the movement of the zoom component of a zoom lens system such that the speed of zooming will be proportional to the amount of manual displacement of a control member. The same manually operable control member which c... | 01/11/1977 |
| 3972056 | Varifocal lens assembly A varifocal lens assembly of a type including at least two lens groups, a first lens group being axially movable parallel to the optical axis of the varifocal lens assembly for varying the focal length of the optical system of the varifocal lens assembly.... | 07/27/1976 |
