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| Number | Title | Issue Date |
| 5628951 | Method of producing a coreless armature An armature, a method for producing the armature and a mold for molding the same are so configured that the coil pitch of each of phase coils is set to a value of 125% or less of the pole pitch, the gap between the respective phase coils of any one of lay... | 05/13/1997 |
| 5523643 | Ultrasonic piezoelectric transducer and ultrasonic actuator An ultrasonic piezoelectric transducer and an ultrasonic actuator for performing enhanced elliptical vibration comprise a first laminated piezoelectric element having a first fixed end, a resonator mounted to the opposite end of the first laminated piezoe... | 06/04/1996 |
| 5493452 | Lens retaining barrel A lens retaining barrel includes a cylindrical part for radially positioning a lens and an abutment for positioning the lens in the direction of the optical axis of the lens. The cylindrical part has a multiplicity of protrusions uniformly and circumferen... | 02/20/1996 |
| 5460503 | Mold for forming a coreless armature A mold for forming coreless armatures having an upper mold and a lower mold. The lower mold has a mold cavity for receiving a shaft capable of supporting windings of a coreless armature. An elastic ring plate is placed between the upper and lower molds an... | 10/24/1995 |
| 5378255 | Method for molding a glass optical element with a transporting supporting member A method of molding a glass optical element. A supporting member is disposed in contact with a receiving mold part. A gob of molten glass is placed on an end surface of the receiving mold part and pre-molded by spreading out in contact with the end surfac... | 01/03/1995 |
| 5366939 | Gradient index optical element A gradient index optical element for use in optical lens such as a camera or microscope is disclosed. The optical element comprises at least one of first metal dopants selected from La, Zr, Sn, In, Y, Ge, Zn, Ba, Ca, As, Sr, Ga and Gd distributed in solve... | 11/22/1994 |
| 5365302 | Focus area setting apparatus of camera A focus area setting apparatus of a camera includes a zoom lens. A focal length detection unit detects the focal length of the zoom lens. A distance measuring unit detects distances of an object at a plurality of distance measurement points without using ... | 11/15/1994 |
| 5357716 | Holding device for holding optical element to be ground A holding device for holding an optical element to be ground is arranged such that pressure applied to a receiving face of the optical element on the holder base is made different in the radial direction in order to eliminate deformation, positional devia... | 10/25/1994 |
| 5349473 | Gradient index optical element A gradient index optical element has at least one first metal dopant selected from the group consisting of La, Y, Ga, In, Ge, Sn, Zn, Zr, Ba, Ca, As, Sr, Gd and Be distributed at a concentration gradient in a glass medium. The concentration gradient of th... | 09/20/1994 |
| 5341212 | Wave front interferometer A wave front interferometer for determining the shape of a surface from interference fringes has a light source which projects a light beam through a beam splitter disposed in an optical path between the light source and an optical surface whose shape is ... | 08/23/1994 |
| 5304884 | Molded armature An armature, a method for producing the armature and a mold for molding the same are so configured that the coil pitch of each of phase coils is set to a value of 125% or less of the pole pitch, the gap between the respective phase coils of any one of lay... | 04/19/1994 |
| 5291692 | Polishing work holder A polishing work holder for supporting a lens to be polished for use in a lens polishing machine is disclosed. The work holder comprises a holder body rotatably supported by a housing and having a recess portion formed on a rotating shaft of one end face ... | 03/08/1994 |
| 5254148 | Method of manufacturing distributed index optical elements A method of manufacturing distributed index optical elements is disclosed. The method comprises a step of preparing silica sol including at least one of metal dopants, a step of dipping, after subjecting the silica sol to a gelling treatment, the silica g... | 10/19/1993 |
| 5249171 | Opto-magnetic pick-up device including phase difference correcting means An opto-magnetic pick-up device for use in an information recording and reproducing device is disclosed. The device comprises a phase difference correcting device capable of correcting the phase difference between the linearly polarized component of the r... | 09/28/1993 |
| 5244844 | Method of manufacturing gradient index optical elements A method of manufacturing a gradient index optical element comprises preparing a sol using silicon alkoxide and an aqueous metal salt solution as a source of index-modifying cations. The sol is treated to obtain a wet gel. Metal salt from the wet gel is e... | 09/14/1993 |
| 5238880 | Method of manufacturing gradient index optical elements A method of manufacturing gradient index optical element comprises preparing a sol using silicon alkoxide and a metal alkoxide as a dopant source of index-modifying cations. The sol is treated to obtain a wet gel. Metal alkoxide from the wet gel is eluted... | 08/24/1993 |
| 5171344 | Method for manufacturing a gradient index optical element In accordance with the present invention, the dopant within one gradient index optical element has two independent concentration distributions. Particularly to use the present invention to obtain a gradient index optical element having an excellent chroma... | 12/15/1992 |
| 5162692 | Ultrasonic oscillator and ultrasonic motor using the same Disclosed is an ultrasonic oscillator comprising piezoelectric elements and a resonator fixed thereto and having one or more inclined surfaces, elliptical oscillations being generated at the front end of the resonator. Also disclosed is an ultrasonic moto... | 11/10/1992 |
| 5149337 | Lens grinder and method of grinding lens In a lens grinder including work spindle unit having a rotatable work spindle to mount a lens to be ground and a curve generator tool spindle unit having a rotatable curve generator tool spindle to mount an optical functional surface grinding stone to gri... | 09/22/1992 |
| 5140777 | Method and apparatus for polishing optical elements An apparatus for controlling the machining of optical elements is disclosed. The apparatus comprises the thus measured value of radius curvature with the measured value of radius curvature of previously polished lens, means for determining curvature corre... | 08/25/1992 |
| 5137013 | Joint structure composed of flexible tubing and a handling apparatus comprising such a joint structures The joint structure of the present invention includes a flexible tube constructed of a coil-wound metal wire element and of another member. This other member includes 1) a main joint joining the end of the outer peripheral surface of the flexible tube to ... | 08/11/1992 |
| 5131159 | Spherometer A spherometer for measuring the radius of curvature of 1 lens is disclosed. The spherometer comprises a spherometer ring having an annular portion or a part of an annular portion, a measuring member coaxially secured to the spherometer ring, a supporting ... | 07/21/1992 |
| 5126779 | Method and apparatus for successively generating photometric values A method and apparatus for effecting photometry in an automatic exposure camera includes the provision of photometric means which determines the brightness of an image field. Upon depression of an operating button, photometry is successively made of the b... | 06/30/1992 |
| 5119595 | Lens grinding apparatus A grinding apparatus with electrolytic in-process dressing suitable for grinding a planar or spherical surface. An electrode is provided on the outer peripheral surface of the work holder such that a gap of a predetermined size is left between the electro... | 06/09/1992 |
| 5110645 | Sheath of articulated tube for endoscope A sheath of an articulated tube for an endoscope is formed of material produced by adding polymer of fluorine-contained rubber material of triple copolymer of vinylidene fluoride-hexafluoropropylene-tetrafloroethylene as a main component, heat-proof plast... | 05/05/1992 |
| 5091067 | Method and an apparatus for machining optical components An apparatus and a method of machining optical components such as lens is disclosed. The apparatus comprises an optical raw stock or material, a rotatable holding shaft for holding the optical raw stock, a machining tool having a machining surface thereof... | 02/25/1992 |
| 5067800 | Composite optical article and method of manufacture thereof A composite optical article has a plastic layer of an outer diameter less than the outer diameter of a lens base member. The plastic layer is formed on the base member so as to expose an optical surface thereof and has a projecting outer periphery. Anothe... | 11/26/1991 |
| 5059022 | Device for measuring radius of curvature and a method thereof A device for measuring the radius of curvature of an optical element comprises a point light source or a pinhole, a beam splitter, an imaging optical system for forming a point image, an attaching member for a substance to be tested which is placed on an ... | 10/22/1991 |
| 5028948 | Photoelectric transducer apparatus for focus detection A photoelectric transducer apparatus detects whether a charge storing period of a photodiode array in a CCD image sensor is more or less than a given period by means of a monitor circuit and controls a charge storing period by switching a charge storage c... | 07/02/1991 |
| 5024024 | Grinding and finishing apparatus and method A grinding and finishing apparatus for mechanically working a workpiece by grinding and finishing process is desclosed. The apparatus comprises a workpiece carrying shaft for carrying a workpiece so as to rotatively drive or rotate it about its axis, a to... | 06/18/1991 |
| 5016993 | Zoom mechanism for zoom lenses A zoom mechanism for zoom lenses drives a focusing lens group in a linear manner and lens groups other than the focusing lens group in either a non-linear or a linear manner, during a zooming operation and, after the zooming operation, drives the focusing... | 05/21/1991 |
| 5010359 | Method and apparatus for photometry from plural points of automatic exposure camera A method and apparatus for effecting photometry from plural points of an automatic exposure camera includes the provision of photometric means which determines the brightness of a relatively limited region of an image field. Photometry is successively mad... | 04/23/1991 |
| 5003423 | Vertical recording magnetic head A vertical recording magnetic head is disposed for movement close to or into sliding contact with a vertical recorded magnetic medium for purpose of magnetic recording and playback. To prevent the influences of external magnetic field upon a recording or ... | 03/26/1991 |
| 4979802 | Synthetic resin half-mirror A synthetic resin half-mirror comprises a synthetic resin substrate, a first SiO film layer deposited thereon, and further at least two SiO2 layers and CeO2 film layers alternately deposited thereon and satisfies a spectral reflectan... | 12/25/1990 |
| 4948235 | Zooming mechanism for zoom lens A zooming mechanism for a zoom lens comprises a zooming frame disposed for translation back and forth with respect to a stationary member in the direction of an optical axis and carrying a focus lens group in a manner to permit its focus adjustment; a dri... | 08/14/1990 |
| 4944581 | Rear face reflection mirror of multilayer film for synthetic resin optical parts A rear face mirror comprised of multilayer film for use in a synthetic resin optical part has a five or six layer structure formed on a synthetic resin substrate and made from SiO, (SiO2), CeO2, Al(Al) and SiO(Cu) having particular o... | 07/31/1990 |
| 4931820 | Auto-focus camera An auto-focus camera detects a focal offset, which is converted into a lens drive value utilizing data stored in lens ROM or the like which is specific to a particular taking lens. When the specific data represents a lens drive value which is stored in a ... | 06/05/1990 |
| 4919520 | Liquid crystal eyeglass Liquid crystal eyeglasses include a detector for detecting a physical quantity which varies with the temperature of the liquid crystal, the orientation of molecules of the liquid crystal or a change in the refractive index of the liquid crystal. The volta... | 04/24/1990 |
| 4878077 | Motor drive and control apparatus for a camera A motor drive and control apparatus for camera compares the speed of movement of a driven member, as detected by an encoder pulse, against a deceleration curve stored in a storage of CPU so as to turn the motor on and off or brake the motor in conformity ... | 10/31/1989 |
