Location History:
- Kawasaki, JP (1992 - 1994)
- Kanagawa-ken, JP (1996 - 1998)
- Yokohama, JP (2005)
Company Filing History:
10 out of 52,766 
1 out of 832,912 Years Active: 1992-2005
Title: The Innovations of Sou Ishika
Introduction
Sou Ishika is a prominent inventor based in Kawasaki, Japan. He has made significant contributions to the field of optical technology, holding a total of 10 patents. His work primarily focuses on advancements in optical head and optical disk drive technologies.
Latest Patents
One of Ishika's latest patents involves an optical head and optical disk drive. This invention features a DVD laser that emits a first light beam, while a CD laser emits a second light beam. An optical diffraction element is utilized to diffract the first and second reflected lights corresponding to these light beams. Additionally, an optical detection element detects the reflected lights from a polarizing beam splitter. The optical axes of the CD and DVD lasers are designed to diverge from each other, allowing for the detection of all necessary reflected light components for focusing and tracking of both CD and DVD formats.
Another notable patent is a light detecting device that receives light from corresponding portions. This device includes an object lens that directs a light beam from a light source to a recording medium. The recording medium features a groove and a header portion formed by interrupting the groove. The light detecting device also comprises a photo-detector that detects the reflected light beam and outputs a signal corresponding to the intensity of the reflected light. The photo-detector is designed with a light beam detecting surface in a specified shape, ensuring that components of the reflected light beam diffracted by the header portion do not interfere with detection.
Career Highlights
Throughout his career, Sou Ishika has worked with notable companies, including Kabushiki Kaisha Toshiba. His experience in the industry has allowed him to develop innovative technologies that have impacted the optical technology landscape.
Collaborations
Ishika has collaborated with several talented individuals, including Akihiro Kasahara and Hideo Yamasaki. These collaborations have contributed to the advancement of his inventions and the overall progress in optical technology.
Conclusion
Sou Ishika's contributions to optical technology through his patents and collaborations highlight his role as an influential inventor in the field. His innovative work continues to shape the future of optical devices and systems.