Yasuyuki Ozawa

Title: Yasuyuki Ozawa: Innovator in Optical Disk Technology

Introduction

Yasuyuki Ozawa is a prominent inventor based in Kawasaki, Japan. He has made significant contributions to the field of optical disk technology, holding a total of 4 patents. His work has been instrumental in advancing the efficiency and functionality of optical systems.

Latest Patents

Ozawa's latest patents include a track retrieval system for optical disks. This innovative system retrieves a track based on track cross pulses corresponding to the number of tracks scanned by a scan beam. The system features a pulse shaping circuit that generates a pulse at a zero-crossing of a track error signal, which is dependent on the tracking error of the scan beam relative to the track. Additionally, it includes a masking circuit that outputs track cross pulses while eliminating chattering pulses. A counter counts the track cross pulses and outputs a counted value, while a control unit sets the predetermined time in the masking circuit based on the moving speed of the scan beam. Furthermore, a correcting circuit may be included to compensate for any pulse dropout of the track cross pulse.

Another notable patent is for an optical head unit that features a disk-shaped rotor. This unit includes a motor with a stator and a rotor that is rotatably mounted on the stator. The rotor has a generally disk-shaped configuration, and an optical system is mounted on a common surface of the rotor. The optical system consists of a light emitting part, a focus actuator, an objective lens, and a light beam receiving part, all working together to enhance the performance of optical disks.

Career Highlights

Yasuyuki Ozawa is currently employed at Fujitsu Corporation, where he continues to innovate and develop new technologies. His expertise in optical systems has made him a valuable asset to the company and the industry as a whole.

Collaborations

Throughout his career, Ozawa has collaborated with notable colleagues such as Shingo Hamaguchi and Tohru Fujimaki. These partnerships have fostered a creative environment that has led to groundbreaking advancements in optical technology.

Conclusion

Yasuyuki Ozawa's contributions to optical disk technology through his patents and collaborations highlight his role as a leading inventor in the field. His work continues to influence the development of advanced optical systems, ensuring a lasting impact on the industry.