Kabushiki Kaisha Topcon

Toshihiro Iwai

Yoshiyuki Hatano

Takahiro Watanabe

Takeshi Nakamura

Jun Akiyama

Ikuo Kitao

Hisao Fujinuma

Shinji Uno

Mitsuo Ishii

Hiroyuki Okada

Akihiro Harada

Yasuko Tsuruga

Jun Onose

Yasuo Suzuki

Kenichi Watanabe

Yasuhito Eto

Takumi Uchiyama

Tatsuro Yokoi

A lens shape measuring method includes: bringing a feeler into contact with an outer peripheral surface of a spectacle lens, the outer peripheral surface corresponding to a lens shape of spectacles, the feeler being rotatable about a rotation axis and movable forward and backward relative to the rotation axis in a radial direction, and, while keeping the contact state, moving the feeler along a contact surface of the feeler with the lens shape in a circumferential direction, to measure radii &#x3c1;i (i=0, 1, 2, . . . n) of the lens shape over an entire circumference of thereof, the radii &#x3c1;i representing change in distance from a geometric center of the lens shape to the feeler, a measurement region of the lens shape being divided into multiple sub-regions, and within each of the sub-regions, the rotation axis line being moved to a position to cause the feeler to measure the lens shape within the sub-region.

Lens shape measuring method and lens shape measuring apparatus

A lens layout setting apparatus for lens grinding processing apparatus having a display screen of a display device for various settings for processing data of eyeglass lens shape for an eyeglass frame, and data of lens grinding process to grind the lens based on the data of lens shape for the frame, further including a control means to add, delete or rearrange a setting condition. The display device displays data of eyeglass lens shape for an eyeglass frame, and of eyeglass lens grinding process required for grinding the lens based on the data, and further displays tabs arranged to display a layout operating screen to set a layout of the data of lens shape for the frame, a state of measuring an edge thickness of the lens, simulation of the shape of a V-shaped protrusion formed on an edge of the lens, and a grinding process screen.

Lens layout setting apparatus for lens grinding process and display apparatus for 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 layout display apparatus for lens grinding processing apparatus having a display screen on which is displayed data of eyeglass lens shape for an eyeglass frame, and data of eyeglass lens grinding process to grind the eyeglass lens based on the data of eyeglass lens shape for an eyeglass frame, the display means also displaying various icons which show a state of measuring an edge thickness of the eyeglass lens, a state of simulation of the shape of a V-shaped protrusion formed on an edge of the eyeglass lens, a state processing the edge portion of the eyeglass lens, and a completion of the grinding process of an eyeglass lens.

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

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

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.

Lens shape measuring apparatus

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

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Tokyo, Japan

Toshihiro Iwai