On Rotary Disc Patents (Class 351/217)
  • Patent number: 9427145
    Abstract: An ophthalmologic measurement apparatus includes a measurement unit that acquires an image of an eye to be inspected, a main unit in which the measurement unit is placed and which includes a holding part for holding the main unit with a hand, an eyepiece part having a shape asymmetric about a measurement optical axis of the measurement unit and capable of being in contact with an area around an eye to be inspected, a position detection unit that detects a position of the eyepiece part, an acquisition unit that acquires eye distinguishing information indicating whether the eye is a right eye or a left eye, and a display control unit that controls a display unit to display an image of the eye such that the image of the eye is rotated in a clockwise or counterclockwise direction based on the eye distinguishing information and a resultant image is displayed.
    Type: Grant
    Filed: June 2, 2015
    Date of Patent: August 30, 2016
    Assignee: Canon Kabushiki Kaisha
    Inventors: Kazuhiro Watanabe, Sakiko Yamaguchi, Naofumi Sekine, Wataru Kaku
  • Publication number: 20140368795
    Abstract: Methods and devices are provided to obtain refractive correction with superior visual acuity (e.g., 20/10) by achieving an astigmatism-free customized refractive correction. The astigmatism-free customized refractive correction involves obtaining an objective and precise measurement of cylindrical power in a resolution between 0.01 D and 0.10 D in an eye using an objective aberrometer, reliably relating the cylindrical axis obtained from the objective aberrometer to that in a phoroptor, determining an optimized focus error of an eye through subjective refraction with a phoroptor, generating a customized refraction by combining the objective measured cylindrical power, the objective measured cylindrical axis, and the subjectively measured focus power, fabricating a custom lens with a tolerance finer than 0.09 D based on the generated customized refraction, and delivering an ophthalmic lens that can provide an astigmatism-free refractive correction for an eye.
    Type: Application
    Filed: August 21, 2014
    Publication date: December 18, 2014
    Inventor: Junzhong Liang
  • Patent number: 8851675
    Abstract: The invention provides a hybrid OCT scanning device which improves OCT scanning of targets, including adaption for a ophthalmic targets (i.e. cornea, retina and fovea areas). The invention provides a movable beam modifying element which is adapted to be interposed in the probe radiation directed to the target, and the interposition of the movable element is synchronous with the periodicity of the OCT scan beam. The beam modifying element may include any of angular deflection regions, optical delay regions, or combinations of deflection and delay regions. Such regions of deflection and/or delay translate into a governable scan range, both lateral and depth, of a target region.
    Type: Grant
    Filed: January 23, 2012
    Date of Patent: October 7, 2014
    Inventor: Josh N. Hogan
  • Patent number: 8444269
    Abstract: An ophthalmoscope. Implementations include a handle coupled to a head where the head includes a front section coupled with a diopter wheel and the front section includes a view window. A back section fixedly attached to the front section includes a diopter number viewer, a trigger button, and a digital imaging section. The digital imaging section may include a liquid crystal display (LCD) screen. The trigger button may be adjacent to the handle and may be positioned opposite the front section between the handle and the LCD screen. The back section may include a rounded projection rotatably coupled with a central hole in the diopter wheel extending from a diopter surface substantially parallel with and in close proximity to the diopter wheel. The diopter number viewer may extend from the diopter surface away from the diopter wheel and may include an opening configured to expose a diopter number.
    Type: Grant
    Filed: June 21, 2011
    Date of Patent: May 21, 2013
    Assignee: EyeQuick, LLC
    Inventor: Marc Ellman
  • Patent number: 7963653
    Abstract: An ophthalmoscope. Implementations include a handle coupled to a head where the head includes a front section coupled with a diopter wheel and the front section includes a view window. A back section fixedly attached to the front section includes a diopter number viewer, a trigger button, and a digital imaging section. The digital imaging section may include a liquid crystal display (LCD) screen. The trigger button may be adjacent to the handle and may be positioned opposite the front section between the handle and the LCD screen. The back section may include a rounded projection rotatably coupled with a central hole in the diopter wheel extending from a diopter surface substantially parallel with and in close proximity to the diopter wheel. The diopter number viewer may extend from the diopter surface away from the diopter wheel and may include an opening configured to expose a diopter number.
    Type: Grant
    Filed: June 25, 2010
    Date of Patent: June 21, 2011
    Assignee: EyeQuick, LLC
    Inventor: Marc Ellman
  • Patent number: 7862173
    Abstract: An opthalmoscope. Implementations include a handle coupled to a head where the head includes a front section coupled with a diopter wheel and the front section includes a view window. A back section fixedly attached to the front section includes a diopter number viewer, a trigger button, and a digital imaging section. The digital imaging section may include a liquid crystal display (LCD) screen. The trigger button may be adjacent to the handle and may be positioned opposite the front section between the handle and the LCD screen. The back section may include a rounded projection rotatably coupled with a central hole in the diopter wheel extending from a diopter surface substantially parallel with and in close proximity to the diopter wheel. The diopter number viewer may extend from the diopter surface away from the diopter wheel and may include an opening configured to expose a diopter number.
    Type: Grant
    Filed: July 29, 2009
    Date of Patent: January 4, 2011
    Assignee: VistaMed, LLC
    Inventor: Marc Ellman
  • Patent number: 7794086
    Abstract: An opthalmoscope. Implementations include a handle coupled to a head where the head includes a front section coupled with a diopter wheel and the front section includes a view window. A back section fixedly attached to the front section includes a diopter number viewer, a trigger button, and a digital imaging section. The digital imaging section may include a liquid crystal display (LCD) screen. The trigger button may be adjacent to the handle and may be positioned opposite the front section between the handle and the LCD screen. The back section may include a rounded projection rotatably coupled with a central hole in the diopter wheel extending from a diopter surface substantially parallel with and in close proximity to the diopter wheel. The diopter number viewer may extend from the diopter surface away from the diopter wheel and may include an opening configured to expose a diopter number.
    Type: Grant
    Filed: July 29, 2009
    Date of Patent: September 14, 2010
    Inventor: Marc Ellman
  • Patent number: 7264354
    Abstract: An electro-active phoropter and a method of using the electro-active phoropter to measure a patient's vision prescription is disclosed. The electro-active phoropter includes a series of individually addressable electro-active lenses. The lenses have either a positive or negative optical power when an electrical potential is applied across the lens and a neutral optical power when no electrical potential is applied across the lens. Each lens provides an optical power that is part of a net optical power of the series of lenses when a patient views through the phoropter. The optical power of the phoropter can be incrementally adjusted by changing the distribution of the electrical potential across the different lenses of the series to provide increasing or decreasing optical power until a patient achieves a desired level of clarity and a vision prescription has been determined.
    Type: Grant
    Filed: February 5, 2004
    Date of Patent: September 4, 2007
    Assignee: E-Vision, LLC
    Inventors: Ronald D. Blum, William Kokonaski, Dwight P. Duston
  • Patent number: 7241013
    Abstract: An optometric apparatus comprises: a pair of right and left lens chamber units, each unit including a test window and optical elements to be selectively disposed in the test window; and a controller including a transmitting part which transmits a control signal in the form of an optical signal to the lens chamber units to selectively dispose the optical elements in the test window, the transmitting part being adapted to widen an extent of diffusion of luminous flux of the optical signal more greatly in a forward to upward directions than in a lateral direction.
    Type: Grant
    Filed: April 26, 2004
    Date of Patent: July 10, 2007
    Assignee: Nidek Co., Ltd.
    Inventor: Noritsugu Nozawa
  • Patent number: 7198367
    Abstract: A fundus imaging apparatus comprises: a beam emitter which simultaneously emits a first laser beam and a second laser beam having a different wavelength from the first beam; an irradiation optical system having a beam scanner which scans the emitted first and second beams in two dimensions on a fundus, the irradiation optical system being adapted to irradiate the emitted first and second beams onto the fundus; a first filter which intercepts the first and second beams reflected by the fundus and second fluorescence from the fundus by irradiation of the second beam and transmits first fluorescence from the fundus by irradiation of the first beam; a second filter which intercepts the first and second beams reflected by the fundus and the first fluorescence from the fundus and transmits the second fluorescence from the fundus; an imaging optical system having a photo-receiving element which receives the first fluorescence having passed through the first filter and the second fluorescence having passed through th
    Type: Grant
    Filed: March 1, 2006
    Date of Patent: April 3, 2007
    Assignee: Nidek Co., Ltd.
    Inventors: Junichi Akita, Naoyuki Kondo, Akihiro Fujishiro, Katsuyasu Mizuno
  • Patent number: 7144112
    Abstract: An optometric apparatus (2) includes a rotary prism (136a, 136b) disposed in front of the eye (E), for adding a prism degree to the eye (E); a rotation device including a pulse motor (181, 184) and a rotation transmitting mechanism (146, 147, 176, 176a, 177, 177a, 178, 179, 182, 183, 185, 186) for transmitting rotation of the pulse motor to the rotary prism, the rotation device being adapted for rotating the rotary prism to change the prism degree; a command device (43a, 43b) for generating a command signal to start and stop the rotation of the rotary prism; and a control unit (60) for controlling the rotation device to drive the pulse motor to rotate at a speed of 5 pulses/sec. or more when the control unit receives the rotation start command signal until when receives the rotation stop command signal, and, to change the prism degree at a speed of 0.1 to 1.0 prism/sec.
    Type: Grant
    Filed: January 27, 2004
    Date of Patent: December 5, 2006
    Assignee: Nidek Co., Ltd.
    Inventor: Hirohisa Terabe
  • Publication number: 20040218146
    Abstract: An optometric apparatus comprises: a pair of right and left lens chamber units, each unit including a test window and optical elements to be selectively disposed in the test window; and a controller including a transmitting part which transmits a control signal in the form of an optical signal to the lens chamber units to selectively dispose the optical elements in the test window, the transmitting part being adapted to widen an extent of diffusion of luminous flux of the optical signal more greatly in a forward to upward directions than in a lateral direction.
    Type: Application
    Filed: April 26, 2004
    Publication date: November 4, 2004
    Applicant: NIDEK CO., LTD.
    Inventor: Noritsugu Nozawa
  • Publication number: 20030206274
    Abstract: A subjective ophthalmic refractor comprises a cylinder power adjustment knob for simultaneously actuating a cylinder power scale and an indexable lens carrier drive assembly. The drive assembly includes a gear phasing hub designed to allow a scale marking to be centered in a display window of the refractor and components of the drive assembly to be set in proper rotational orientation as independent operations.
    Type: Application
    Filed: May 1, 2002
    Publication date: November 6, 2003
    Inventor: Christopher Goris
  • Publication number: 20030206273
    Abstract: A subjective ophthalmic refractor of a type comprising a ring-shaped cylinder power scale having an internal gear actuated by a scale drive gear connected to a cylinder power adjustment knob of the refractor is improved by providing a bearing insert within the cylinder power scale. The bearing insert includes radially and axially facing annular bearing surfaces extending about a substantial portion of the scale, and a cut-out region allowing space necessary for the scale drive gear.
    Type: Application
    Filed: May 1, 2002
    Publication date: November 6, 2003
    Inventor: Christopher Goris
  • Patent number: 5812241
    Abstract: A compact and precise phoropter of low requirements as to material and favorable as to kinematics comprises two observation channels in each of which a plurality of equal sized disks are rotatably and coaxially arranged about an axle, each of said disks being provided with a number of element sites where spherical lenses, cylindrical lenses, cross cylinders and further optically effective accessory elements are located. At least the cylindrical lenses are seated for rotation on said disks and are provided with first drive wheels, the diameters of the latter being substantially equal to the diameter of a second drive wheel rotatable with the axle and being associated to the respective disk. The diameters of the entire disks are determined by the diameters of the first and the second drive wheels and are at least three-fold the diameter of the first drive wheels.
    Type: Grant
    Filed: February 16, 1996
    Date of Patent: September 22, 1998
    Assignee: Block Medizintechnik GmbH
    Inventors: Manfred Doms, Ulrich Fischer
  • Patent number: 5671039
    Abstract: A glare tester suitable for use with conventional subjective refractors for testing visual acuity is disclosed. The tester may be fitted to new refractors or retrofitted to existing refractors. The preferred tester is a plastic annular ring with a plurality of LEDs mounted in recesses to direct light toward the test axis and a surface to reflect the LED light toward the patient's eye. A coating on the ring surface opposite the patient's eye improves the LED efficiency.
    Type: Grant
    Filed: October 19, 1992
    Date of Patent: September 23, 1997
    Assignee: Leica Inc.
    Inventor: Bernard Grolman
  • Patent number: 5650839
    Abstract: Techniques and retinoscopic apparatus for measuring or determining a patient's optical error are disclosed. The techniques include overrefraction and can be performed from a fixed position, avoiding the practitioner's need to move back and forth relative to the patient's eye. Equipment associated with the apparatus is adapted to record the location of the retinoscope slide (relative to its upper or lower position) during the examination to provide information concerning the optical error present in the patient's eye. Other associated equipment can include discs of spherical lenses and devices for limiting relative movement of components of the retinoscopic apparatus. Alternatively, the apparatus may include a scale graduated in suitable units for determining the patient's optical error.
    Type: Grant
    Filed: March 14, 1996
    Date of Patent: July 22, 1997
    Inventor: Clinton N. Sims
  • Patent number: 5619290
    Abstract: A haploscope has a housing defining left and right viewing apertures disposed to permit substantial alignment with a subject's left and right eyes and permit viewing through the housing. Projection light sources for projection of left and right images are provided and the housing defines first and second light source apertures for transmission of light from the sources therethrough. The haploscope has first and second projection devices for projecting images using the light passing through respective ones of the first and second light source apertures. The housing has a rotary disc and a motor for rotating the rotary disk within the housing at a position permitting occlusion of the first and second light source apertures and the left and right viewing apertures. The rotary disc has at least one viewing aperture disposed to align with the left and right viewing apertures during rotation of the rotary disc such that only one of the left and right viewing apertures is not occluded at a given time.
    Type: Grant
    Filed: January 31, 1995
    Date of Patent: April 8, 1997
    Assignee: Tagawa Denki Kenkyusyo Company
    Inventors: Shigekatsu Nakayama, Seiji Ishimaru
  • Patent number: 5479221
    Abstract: An apparatus for testing visual acuity, or clearness of vision, particularly when there is impaired refracting medium in an eye, includes a lamp (1) and a pin-hole diaphragm (4) arranged in a light-beam path downstream of the lamp with a single diffraction grating (6), being provided in the light-beam path downstream of the pin-hole diaphragm.
    Type: Grant
    Filed: May 26, 1994
    Date of Patent: December 26, 1995
    Assignee: Heine Optotechnik GmbH & Co. KG
    Inventors: Helmut Heine, Anton Schneider, Otto H. Schmidt
  • Patent number: 5424789
    Abstract: An optical device comprising a lens and an adjustable lens holder which is adapted to be positioned on an existing slit lamp biomicroscope such that the lens may be selectively positioned in the path of the illuminating light beam from the slit lamp light source. In one embodiment of the invention, the adjustable holder is designed to be rotatably positioned in association with the slit lamp light illumination apparatus and in relation to the projecting or objective lens of the slit lamp illumination system. The lens holder is designed to pass a narrowed zone on support structures associated with the light illumination apparatus and to frictionally engage a portion of the support structure while allowing rotation of the lens into and out of the path of the illuminating light beam.
    Type: Grant
    Filed: May 28, 1993
    Date of Patent: June 13, 1995
    Inventor: Donald A. Volk
  • Patent number: 5300965
    Abstract: This invention provides a corneal shape measuring apparatus that can correctly measure the shape of the cornea of a subject's eye from an image of a target reflected by the cornea even if the optic axis of a hand-held indicator is inclined with respect to the optic axis of the measuring system when measurements are made. A computing control circuit computes the inclination with respect to the measuring optic axis of an indicator plate from the shape of a guide hole in the indicator plate which had previously been input and the shape of the image of the guide hole, and corrects the image of the indicator reflected by the cornea of the subject's eye based on this inclination.
    Type: Grant
    Filed: May 1, 1992
    Date of Patent: April 5, 1994
    Assignee: Kabushiki Kaisha Topcon
    Inventor: Nobuaki Kitajima
  • Patent number: 5223864
    Abstract: The phoropter is provided with a rotating knob means for selecting specific types of functions (12,13,14), the angular position being picked up by means of a pulse generator, e.g.
    Type: Grant
    Filed: June 14, 1990
    Date of Patent: June 29, 1993
    Assignee: J. D. Moller Optische Werke GmbH
    Inventor: Lorenz Twisselmann
  • Patent number: 4673265
    Abstract: This invention concerns a procedure and device for refractometric measurement of the degree of ametropia of a human eye.The device for this invention comprises a light-emitting source combined with a focusing lens, which produces an image of this source on the retina of the eye to be tested, a succession of test lenses which are placed in turn between the eye and the focussing lens, so that the optical axis of the relevant test lens coincides with the optical axis of the eye, and a light-intensity detector placed on this same axis at a fixed distance from the eye, together with means of identifying which test lens causes the detector to emit a signal of minimum intensity.The invention applies to instruments to measure visual acuity, more specifically in handicapped or very young patients.
    Type: Grant
    Filed: September 5, 1986
    Date of Patent: June 16, 1987
    Assignee: Essilor International (Compagnie Generale d'Optique)
    Inventors: Jean C. Hache, Mireille Servant
  • Patent number: 4580559
    Abstract: In a preferred embodiment, a portable ophthalmoscope having low-power telescope elements and having an internal source of viewed-field illumination, relies on a patient's focusing properties to inspect the fundus of the eye. A laser-beam source is flexibly coupled to the patient end of the ophthalmoscope viewing axis and, after optical expansion and collimation, is folded into coincidence with the ophthalmoscope axis. A dichroic (filter) is the mirror via which the folding takes place, the filter being selected for a very narrowly limited spectral band of great attenuation of radiation at the characteristic wavelength of the involved laser, the latter having been selected for its photocoagulating and/or photoablating action on locally afflicted tissues of the retinal, choroid and/or other internal regions of the eye.
    Type: Grant
    Filed: July 24, 1984
    Date of Patent: April 8, 1986
    Inventor: Francis A. L'Esperance
  • Patent number: 4385813
    Abstract: Method for obtaining cross cylinder-like actions for using the adjusting or aligning measurement known as the cross cylinder method in phoropters for subjective refraction, wherein the spherical and cylindrical lens discs of the phoropter are adjusted in preprogrammed manner to cross cylinder-like lens systems.The set problem is also solved by a phoropter with spherical test lenses and cylindrical lenses arranged on lens discs and which can be introduced into the observation optical path, wherein the motor drives of the lens discs are combined in a program control unit, connected to an operating unit and an indicating unit.
    Type: Grant
    Filed: April 15, 1982
    Date of Patent: May 31, 1983
    Assignee: J. D. Moller Optische Werke GmbH
    Inventors: Friedrich Klein, Joachim Burmeister, Nils Warming