Yoshinobu Usui

Title: **Innovator Yoshinobu Usui: Pioneering Optical Disc Technology**

Introduction

Yoshinobu Usui is a prolific inventor based in Kanagawa, Japan, renowned for his significant contributions to optical disc technology. With a remarkable portfolio consisting of 15 patents, Usui has advanced the field of data recording and optical media, improving efficiency and reliability in information storage.

Latest Patents

Among Usui's latest innovations are two notable patents: an optical disc medium and a data recording method and apparatus. The first patent describes an optical disc medium that incorporates a substrate designed to reflect modulated information data. This innovative medium features a coating film that allows known data to be recorded at predetermined locations, with the capability of rewriting this data as postscript information. This rewrite process involves forming a postscript portion on the coating film, thus altering parts of the original data while ensuring the recorded information remains readable and error-free.

The second patent focuses on the molding and film forming apparatus that creates the disc substrate from an optical disc master. This technology not only molds the substrate but also forms a reflective coating film, resulting in a fully recorded optical disc. Further, a subsequent process enables the addition of postscript information, enhancing the optical disc's functionality. By employing a laser beam, pits are formed on specific intervals of the disc, allowing for identifiable postscript data that can be reproduced using existing optical disc players.

Career Highlights

Yoshinobu Usui has made considerable strides in the field of optical technologies through his work with notable companies. He has contributed his expertise at Sony Corporation and Sony Disc & Digital Solutions Inc., where his innovative ideas have significantly propelled advancements in optical disc technology.

Collaborations

Throughout his career, Usui has collaborated with talented individuals in the field. Among his notable coworkers are Akiya Saito and Yoichiro Sako, both of whom have played vital roles in the development and refinement of optical disc technologies alongside Usui.

Conclusion

Yoshinobu Usui's work embodies the essence of innovation in optical media, transforming the landscape of data recording with his groundbreaking patents. His ongoing dedication to improving optical technologies solidifies his status as a key inventor in the field, inspiring future advancements in how information is stored and accessed.