Patents by Inventor Ikuka Tanaka

Ikuka Tanaka 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).

  • Publication number: 20120026183
    Abstract: A visual field image display device for spectacles capable of displaying a retinal image by simulation corresponding to change even in visual line direction. A visual field image display device for spectacles adapted to display a retinal image seen when wearing a progressive-addition lens by simulation includes: an image processing section adapted to create the retinal image by performing a processing of adding blur and distortion to data of an original image in a visual field corresponding to the direction of a visual line of an eye of a person in a state where the person wears the progressive-addition lens, wherein the blur and distortion correspond to a passing point of the visual line on the progressive-addition lens; and a display section adapted to display the retinal image created by the image processing section.
    Type: Application
    Filed: October 13, 2009
    Publication date: February 2, 2012
    Applicant: HOYA CORPORATION
    Inventors: Hua Qi, Ikuka Tanaka, Kenji Taketo
  • Patent number: 6329989
    Abstract: There are provided an ocular optical system simulating method and a simulating apparatus which enable simulation of how things can be seen, together with fluctuation, deformation, blur, etc., occurring when a lens system such as a progressive addition lens is worn. A rotation-based retinal image, defined as an image obtained by turning an eye-ball with respect to all object points within a field of vision and by connecting images caught at the fovea, is made. The image is made by first creating an original image having a specific angular field of vision and entering the eye having a specific rotation center point. Then, a deformed original image having deformation occurring when the original image is seen through the lens system is created by using ray tracing. A PSF on the retina of an eye-model from light from the object points of the original image in an optical system composed of the lens system and a spectacle model is determined.
    Type: Grant
    Filed: October 12, 1999
    Date of Patent: December 11, 2001
    Assignee: Hoya Corporation
    Inventors: Hua Qi, Ikuka Tanaka