Nobutaka Ohnuki

Title: Nobutaka Ohnuki: Innovator in Optical Disc Technology

Introduction

Nobutaka Ohnuki is a notable inventor based in Tokyo, Japan. He has made significant contributions to the field of optical disc technology, holding a total of 4 patents. His work focuses on improving the efficiency and reliability of information reproduction from optical discs.

Latest Patents

Ohnuki's latest patents include a tracking control unit in information reproducing apparatus. This invention employs a tracking servo to ensure that a light beam accurately follows a track on an optical disc. In cases where tracking deviation occurs due to flaws on the track, the tracking servo is switched off after a predetermined number of deviations within a set time. Simultaneously, a braking action is executed to impede the movement of the light beam, with the braking force adjustable according to the beam's velocity. Another significant patent is for an apparatus that reproduces information recorded on a disk. This device features a tracking servo for an actuator that directs a read beam to the disk's track. Upon turn-off of the tracking servo system, a first power product is applied to the actuator, and the actuator's velocity is detected based on an error signal from the tracking servo device.

Career Highlights

Throughout his career, Nobutaka Ohnuki has worked with prominent companies such as Hitachi, Ltd. and Hitachi Video Engineering Inc. His experience in these organizations has allowed him to develop and refine his innovative ideas in optical technology.

Collaborations

Ohnuki has collaborated with notable coworkers, including Takashi Kimura and Junichi Ikoma. Their combined expertise has contributed to advancements in the field of optical disc technology.

Conclusion

Nobutaka Ohnuki's contributions to optical disc technology through his patents and collaborations highlight his role as an influential inventor. His work continues to impact the efficiency of information reproduction systems.