Patents by Inventor Kenishi Kasazumi

Kenishi Kasazumi 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).

  • Holographic recording apparatus having a liquid crystal modulator including a diffuser with plural phase shift regions
    Patent number: 5317435
    Abstract: Light emitted from a coherent light source undergoes fine adjustment of its polarizing direction by a polarizing device and is directed to a liquid crystal device through a collimating optical system. The polarizing device is capable of fine-adjusting the polarizing direction in accordance with the wavelength of the incident light, thereby providing a high contrast ratio. When an image is recorded by holography using such a liquid crystal spacial light modulator, it is possible to obtain an image of high quality.
    Type: Grant
    Filed: February 10, 1993
    Date of Patent: May 31, 1994
    Assignee: Matsushita Electric Industrial Co., Ltd.
    Inventors: Kenishi Kasazumi, Makoto Kato, Ikunori Kobayashi