Patents by Inventor Matsuo, Kazumasa

Matsuo, Kazumasa 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).

  • Apparatus for photometrically detecting an optically focused condition of an optical system
    Patent number: 4737622
    Abstract: An apparatus for detecting a focused condition of an optical system, in which a light-receiving means arranged at a fixed position corresponding to a focus position photometrically detects a focused condition. A light beam having a definite shape is projected onto an object to be imaged by a light projection means. The reflected light beam is conducted along an optical axis of the optical system, deflected, and detected by the light receiving means for determining whether a focused condition exists. Several embodiments are disclosed for projecting a light spot of high contrast on the object and for detecting a focused condition on the basis of the intensity distribution of light received by the light-receiving means. The apparatus may be applied to an endoscope and other optical systems.
    Type: Grant
    Filed: January 13, 1987
    Date of Patent: April 12, 1988
    Assignee: Olympus Optical Co., Ltd.
    Inventors: Yoshio Shishido, Susumu Takahashi, Matsuo, Kazumasa, Miyazaki, Atsushi, Shinichi Nishigaki, Shinichi Kato, Takeaki Nakamura, Akibumi Ishikawa