Patents by Inventor Masano Fujieda

Masano Fujieda has filed for patents to protect the following inventions. This listing includes patent applications that are pending as well as patents that have already been granted by the United States Patent and Trademark Office (USPTO).

  • Refractive characteristics measuring apparatus for measuring the refractive characteristics of a lens
    Patent number: 5307141
    Abstract: A refractive characteristics measuring apparatus enables the measurement of the refractive characteristics of a progressive multifocal lens through the observation of a geometrical test pattern through the lens. The apparatus comprises selector switches for selecting a desired geometrical test pattern, modifying the geometrical test pattern and moving the geometrical test pattern, a pattern generator for generating data representing the selected geometrical test pattern, a display for displaying the selected geometrical test pattern, and supporting members for supporting the lens on the display. The geometrical test pattern displayed on the display is observed through the lens to determine the respective positions of the far viewing section and near viewing section of the progressive multifocal lens through the observation of the geometrical test pattern distorted according to the distribution of refractive power in the progressive multifocal lens.
    Type: Grant
    Filed: November 23, 1992
    Date of Patent: April 26, 1994
    Assignee: Nidek Co., Ltd.
    Inventor: Masano Fujieda