Seiko Epson Corporation

Hoya Lens Manufacturing Philippines Inc.

Ehs Lens Philippines, Inc.

Osamu Wada

Junichi Nakamura

Masanobu Kobayashi

Hideki Matsuda

Tadashi Kaga

Toshihide Shinohara

Yoshinori Awanohara

Osamu Yokoyama

Osamu Kamiwaki

Akira Komatu

Hiroshi Asami

A progressive-power spectacle lens design method, the progressive-power spectacle lens including a distance portion, a near portion, and a progressive portion provided between the distance portion and the near portion, the method comprising: decreasing a distance along a principal meridian from a fitting point to a progression start point and increasing a length of a progressive corridor defined by the progression start point and a progression end point when addition power is large, whereas increasing the distance along the principal meridian from the fitting point to the progression start point and decreasing the length of the progressive corridor when the addition power is small, wherein the distance from the fitting point to the progression end point is fixed irrespective of the addition power.

Progressive-power spectacle lens design method

A spectacle lens includes a first region which is located in at least part of a portion of a lens where a pivotal angle of an eyeball of a wearer ranges from 20 to 60 degrees and in which correcting astigmatism has priority over correcting average power based on prescribed power, and a second region which is formed inside the first region and in which correcting the average power has priority over correcting the astigmatism.

Spectacle lens, spectacle lens design method, and design apparatus

A vision shift amount measuring method includes: forming a reference mark indicating a distance eye point on a surface of a spectacle lens attached to a spectacle frame practically worn by a wearer, and forming a plurality of opaque lines in an area expected to contain a shifted vision on the surface of the spectacle lens with a predetermined space between the adjoining lines; and allowing the wearer wearing the spectacle frame to select the line closest to a position through which the vision passes from the plural formed lines.

Vision shift amount measuring method and vision shift amount measuring jig

The color display device includes a colored light generation unit for repetitively generating a plurality of colored lights in a time sequence with a predetermined frequency, and an image generation unit for processing said plurality of colored lights, so as to generate an image corresponding to each of the plurality of colored lights generated in a time sequence. The said predetermined frequency is 180 Hz or more.

Color display device and color display method

A lens that covers the front side of an eye, includes: a high light-transmissive region including an eyepoint; and a low light-transmissive region surrounding the entire circumference of the high light-transmissive region, a light blocking ratio in the low light-transmissive region being higher than the light blocking ratio in the high light-transmissive region, wherein the low light-transmissive region has a region where the light blocking ratio changes toward the periphery.

Eyeglass lens

A wearing condition parameter measurement device for a spectacle lens adapted to measure a wearing condition parameter necessary for manufacturing spectacles includes a mirror having a mirror surface adapted to reflect the wearing condition of a wearer of the spectacle lens, an imaging camera adapted to simultaneously shoot the wearer and the mirror surface reflecting the wearer to obtain a shot image, and a calculation device adapted to calculate the wearing condition parameter based on the shot image obtained by the imaging camera.

Wearing condition parameter measurement device for spectacle lens and wearing condition parameter measurement method for spectacle lens

An eyeball infraduction value Indih is measured, and then &#x394;E is determined from an equation &#x394;E=Indih&#x2212;(Fh+SPh+Nh) based on the eyeball infraduction value Indih, a distance portion eyepoint height Fh, a progressive corridor length SPh, and a reading portion eyepoint height Nh, and Oh is determined from an equation of Oh=Bh&#x2212;(Fh+SPh+Nh+&#x394;E+Uh) based on the &#x394;E, a lens portion height Bh, the distance portion eyepoint height Fh, the progressive corridor length SPh, the reading portion eyepoint height Nh, and a lower frame height Uh. A spectacle lens that satisfies conditions of 0 mm&#x2266;&#x394;E&#x2266;2 mm and 0 mm&#x3c;Oh is selected.

Spectacle lens selection method and spectacle lens selection system

A spectacle lens selection system includes a manufacturer side terminal and a store side terminals installed in a store and is connected to the manufacturer side terminal via a network. The store side terminal transmits a wearing condition parameters including a downward rolling length of eyes and a lateral gaze length of a spectacle wearer to the manufacturer side terminal, and the manufacturer side terminal selects a most suitable product based on the wearing condition parameters, and transmits the result to the store side terminal.

Spectacle lens selection system and spectacle lens selection method

An apparatus for measuring a downward rotation amount of eyeball that measures a length from a distance-vision eye point to a near-vision eye point of a spectacle lens actually worn by a wearer and attached to a frame having an upper side portion and a lower side portion, includes: a line-of-sight position detecting unit that detects a position of a line of sight corresponding to the distance-vision eye point of the wearer and a position of a line of sight corresponding to the near-vision eye point; and a computing unit that computes a distance between the position of the distance-vision eye point and the position of the near-vision eye point detected by the line-of-sight position detecting unit, wherein the line-of-sight position detecting unit has an arm member that is rotatable at one end and positioned at a lateral position of an eyeball of the wearer, a front detecting mechanism that is disposed on the other end side of the arm member and detects a front position of the eyeball of the wearer, and an arm rotation angle detecting unit that detects a rotation angle of the arm member.

Apparatus for measuring downward rotation amount of eyeball and method for measuring downward rotation amount of eyeball

An image display system that performs grayscale correction in accordance with the on-site environment, to display an image, is provided with: a calibration signal generation section () that generates calibration signals for displaying each of first and second grayscale correction images having two grayscale values of a single color, a color-light sensor () that measures luminance values under an ideal environment and the on-site environment for each of the first and the second grayscale correction images projected on a screen, a 1D-LUT generation section () that generates a 1D-LUT based on the luminance values measured by the color-light sensor (), and a grayscale correction section () that stores the 1D-LUT generated by the 1D-LUT generation section () and performs grayscale correction.

Image display system, projector, information storage medium, and image processing method

A projector including: an image projection section for projecting an image onto a rectangular screen through a liquid crystal panel; a position adjustment information generation section for generating position adjustment information based on position adjustment of the image made by a user; a correction information generation section for generating position correction information for correcting positions of four corners of the image on the screen based on the position adjustment information; and a correction section for correcting image information for projecting the image based on the position correction information.

Growing community of inventors

Ina, Japan

Osamu Wada