Location History:
- Yokohama, JA (1977)
- Yokohama, JP (1984)
- Kanagawa, JP (1994 - 1998)
Company Filing History:
Years Active: 1977-1998
Title: Tsunehiro Maruo: Innovator in Optical Pickup Technology
Introduction
Tsunehiro Maruo is a prominent inventor based in Kanagawa, Japan. He has made significant contributions to the field of optical technology, particularly in the development of optical pickup devices. With a total of 5 patents to his name, Maruo's work has had a substantial impact on optical disc technology.
Latest Patents
One of Maruo's latest patents is an optical pickup apparatus that includes an optical rotation device. This innovative device is designed for use in optical systems, such as optical disc reproducing apparatuses. It facilitates the reproduction of desired information on various types of optical discs, including magneto-optical discs, compact discs (CDs), and video discs. The apparatus utilizes diffraction and various optical rotation devices to effectively direct incident and reflected light rays to the optical disk and photodetectors. Specifically, light emitted by a laser source is trisected into 0-th and ±1-th order light. The rays are then rotated by an optical rotation device, converged on the optical disk, reflected, and subsequently rotated again. Finally, the rays are deflected to a photodetector, which produces light quantity detection signals, such as tracking error signals. Another notable patent is an optical pickup apparatus that includes a hologram element.
Career Highlights
Tsunehiro Maruo is currently employed at Sony Corporation, where he continues to innovate in the field of optical technology. His work has been instrumental in advancing the capabilities of optical pickup devices, making them more efficient and effective for various applications.
Collaborations
Maruo has collaborated with notable colleagues, including Hideyoshi Horimai and Junichi Toyoda. Their combined expertise has contributed to the successful development of advanced optical technologies.
Conclusion
In summary, Tsunehiro Maruo is a key figure in the realm of optical technology, with a focus on optical pickup devices. His innovative patents and collaborations have significantly influenced the industry, showcasing his dedication to advancing optical technology.