Kabushiki Kaisha Topcon

Tokyo Kogaku Kikai Kabushiki Kaisha

Yoshiyuki Hatano

Takeshi Nakamura

Toshihiro Iwai

Kenichi Watanabe

Yasuhito Eto

Jun Akiyama

Ikuo Kitao

Takumi Uchiyama

Shinji Uno

Hisao Fujinuma

Takahiro Watanabe

Yasuhiko Kusaka

Susumu Takahashi

Yasuo Suzuki

Yasuo Kato

Yoshinori Oana

Tatsuro Yokoi

An apparatus for processing a chamfering of an eyeglass lens, including means for inputting a width of the chamfering and a range of the chamfering from a periphery of a lens shape at at least one position adjacent to a nose or far away from the nose, arithmetic control means for obtaining a trace for the chamfering on a refractive surface of the eyeglass lens and obtaining the position of the edge end of the eyeglass lens after the processing of the chamfering, and means for displaying the trace of the chamfering by overlapping the lens shape.

Apparatus for processing chamfering of eyeglass lens

A method for processing a chamfering of an eyeglass lens, including the steps of inputting a width of the chamfering and a range of the chamfering from a periphery of a lens shape at a position adjacent to a nose and/or a position far away form the nose, obtaining a trace of the chamfering on a refractive surface of the eyeglass lens and displaying the trace of the chamfering by overlapping the lens shape.

Method for processing chamfering of eyeglass lens and apparatus for processing the same

A lens shape data processing apparatus and a lens grinding machine having the same apparatus in which the lens shape data reading out and the layout setting work for another spectacle lens can be conducted during the lens edge measurement or the grinding process is provided. The lens shape processing apparatus comprises a memoryfor storing a plurality of lens shape information for the spectacle frame measured by a frame readera liquid crystal display unitincluding an image display sectionfor displaying the lens shape based on the lens shape information and an operation contents display sectionfor displaying items for switching a plurality of screens, a plurality of keys corresponding to the items of the operation contents display section, and an arithmetic control circuitfor setting the data for grinding an unprocessed lens into a lens shape based on the lens shape information, wherein the keys are used both to switch to a screen for selecting and accessing one of the lens shape information stored in the memory, and to access the preceding lens shape information and the next lens shape information or new lens shape information.

Lens shape data processing apparatus and lens grinding machine having the same apparatus

A lens grinding method and apparatus for changing a lens rotation speed when grinding a spectacle lens by using spectacle frame lens shape information, spectacle lens information such as spectacle lens material, and various spectacle processing information required for processing a spectacle lens.

Lens grinding method and lens grinding apparatus

A lens shape measuring apparatus is disclosed, which is capable of identifying a size of an outer-diameter shape of a lens fixing jig by using a measuring element also used for measuring a lend shape. This lens shape measuring apparatus comprising: a lens fixing jig installed in an eyeglass lens to be processed to clamp the eyeglass lens; a lens rotation shaft for clamping and rotating the lens to be processed; a measuring element abutted on a refracting surface of the lens clamped by the lens rotation shaft; a measuring element position switching mechanism for controlling rotation of the measuring element around a rotation shaft roughly parallel to the lens rotation shaft; and a measuring unit for measuring a moving distance of the measuring element in a direction roughly parallel to the lens rotation shaft. This lens shape measuring apparatus also comprises arithmetic control means for moving a tip of the measuring element relatively in the direction roughly parallel to the lens rotation shaft, measuring a distance from a measuring reference position of the measuring element to an abutting position of the same by the measuring unit, and identifying a shape of the lens fixing jig based on a result of the measurement.

Lens shape measuring apparatus

Methods and apparatuses for spectacle lens chamfering, wherein a predetermined chamfer width is inputted from a peripheral edge of a lens shape of a spectacle frame and a chamfer locus on a refraction plane of a spectacle lens is obtained.

Spectacle lens chamfering data preparing method, spectacle lens chamfering method, spectacle lens chamfering data preparing apparatus, and spectacle lens chamfering apparatus

An initial position setting method for grinding work apparatus includes: a grind stone a pair of lens rotating shafts which are capable of approaching and drawing apart each other along a normal line of the grind stone a ditch excavation grind stone and chamfering grind stones . A measurement standard with a predetermined shape is adapted to be held by the lens rotating shafts The ditch excavation grind stone and the chamfering grind stones are adapted to be moved to the predetermined position. The lens rotating shafts are adapted to be moved in order for the measurement standard to contact with the ditch excavation grind stone or the chamfering grind stones to obtain a moving distance of the lens rotating shafts when the measurement standard is contacted and to carry out an initial setting for moving distance of the ditch excavation grind stone or the chamfering grind stones on a basis of the moving distance of lens rotating shafts and a dimension of the measurement standard.

Initial position setting method for grinding device

Disclosed is a grinding fluid supply device of a lens grinding apparatus. The grinding fluid supply device includes first grinding fluid supply means for supplying a grinding fluid in a tangent direction of a circular grinding wheel, which has a grinding surface formed on its circumferential surface, with an interval above a grinding surface and allows an upper portion and a rear side portion of the grinding surface to be covered with a curtain of the grinding fluid spaced from the grinding wheel when a processed lens is subjected to a grind processing with the grinding surface of the grinding wheel by rotatively driving the grinding wheel around an axis; and second grinding fluid supply means for insufflating the grinding fluid to the grinding surface.

Grinding fluid supply device of lens grinding apparatus

The present invention provides an apparatus for displaying lens contour, an apparatus for processing lens contour data, and apparatus for grinding edge of eyeglass lens with the same so that these apparatuses can grasp contours of the eyeglass frame and the eyeglass lens related to three dimensional virtual display (3D V-shaped simulation), and a V-shaped figure formed in an edge surface of lens in three dimensions to represent visually assembling of the virtual frame. These apparatuses comprises, an input means of lens rim contour data for inputting left/right lens rim contour data of an eyeglass frame MF in three dimensions; a calculating/determining circuit for calculating, based on the inputted lens rim contour data, an angle of inclination of lens rim contour of either left or right eye of the eyeglass frame to lens rim of the other eye; and a liquid crystal display panel for displaying a type of inclination of left/right lens rims of the eyeglass frame, based on the calculated results, as side view from upper or lower side of the eyeglass frame.

Apparatus for displaying lens contour, apparatus for processing lens contour data, and apparatus for grinding edge of eyeglass lens with the same

There are provided a lens periphery processing method for an eyeglasses lens, a lens periphery processing machine and lens for eyeglass, in which a V shaped portion that fits strongly in a lens frame of eyeglasses frame, can be processed in such a manner that V shaped portion contact with inside of the V shaped groove of the lens frame so that a contact element does not interfere with a holding means for fixing and holding a lens frame, and even if the V shaped groove shape is measured in a state in which the lens frame is tilted, a difference in size due to holding position between the lens frame and a processed eyeglasses lens does not arise. Measuring the lens frame shape of eyeglasses frame by contacting the contact element having a width narrower than the width of the V shaped groove , on the both sides of the V shaped groove formed in the inner face of the lens frame for eyeglasses lens, and forming the V shaped portion of said eyeglasses lens in a shape that the eyeglasses lens is put in the V shaped groove with contacting at the points where the contact element contacted on said both sides of the groove, as substantially the deepest contacting points in the groove.

Lens periphery processing method for eyeglass lens, lens periphery processing machine and lens for eyeglass

A lens shape measuring apparatus is provided which comprises lens rotating shafts (16, 17) for rotatably holding an uncut lens, a feeler (63, 219, 220) disposed in contact with a working locus of the front or rear surface of the lens, and a calculation/control circuit (100) for detecting a difference in surface level of the lens from a change in data measured by the feeler (63, 219, 220) and controlling the contact of the feeler with the lens.

A lens shape measuring apparatus is provided which comprises lens rotating shafts (16, 17) for rotatably holding an uncut lens, a feeler (63, 219, 220) disposed in contact with a working locus of the front or rear surface of the lens, and a calculation/control circuit (100) for detecting a difference in surface level of the lens from a change in data measured by the feeler (63, 219, 220) and controlling the contact of the feeler with the lens

In an ophthalmoscopic instrument such as an eye fundus camera or an eye refractometer, a device is provided for detecting the position of a patient's eye. The device includes a target projecting system for projecting a light beam to the patient's eye, an imaging lens for imaging the light beam as reflected at the patient's eye and a detector for sensing the reflected light beam. A chopper is provided for selectively passing the reflected light beam to the detector for making it possible to produce a signal which includes informations of imaging condition of the light beam at the detector.

Growing community of inventors

Tokyo, Japan

Yoshiyuki Hatano