Location History:
- Saitama, JP (1993)
- Tokyo, JP (1985 - 1994)
Company Filing History:
Years Active: 1985-1994
Title: Innovations by Tomoyuki Shirai
Introduction
Tomoyuki Shirai is a notable inventor based in Saitama, Japan. He has made significant contributions to the field of optical technology, holding three patents that showcase his innovative spirit and technical expertise. His work primarily focuses on devices that enhance the accuracy and efficiency of optical systems.
Latest Patents
One of his latest patents is a relative velocity sensing device. This device is designed to sense an optical beam spot by utilizing a tracking error difference signal that fluctuates as a sine wave in accordance with the movement of the beam spot. The tracking error difference signal is converted into a first sawtooth wave signal and a second sawtooth wave signal, which is phase-shifted by one half of the period of the first signal. By obtaining a first and second differential signal based on these sawtooth wave signals, a high-accuracy velocity signal of the beam spot can be achieved.
Another significant patent is an optical head locating mechanism for magnetically positioning an optical head within an optical device. This mechanism includes a first location device that allows the optical head to float and be accurately positioned along the focusing direction, as well as a second device that operates in a direction orthogonal to the tracking direction. This innovation enables smooth and rapid movement of the optical head while ensuring precise location.
Career Highlights
Tomoyuki Shirai is currently employed at Asahi Kogaku Kogyo Kabushiki Kaisha, a company known for its advancements in optical technology. His work at this organization has allowed him to develop and refine his inventions, contributing to the company's reputation in the industry.
Collaborations
Shirai collaborates with Tsutomu Fukui, a fellow innovator, to further enhance their research and development efforts in optical technologies. Their partnership exemplifies the importance of teamwork in driving innovation.
Conclusion
Tomoyuki Shirai's contributions to optical technology through his patents demonstrate his commitment to innovation and excellence. His work not only advances the field but also sets a standard for future developments in optical systems.