Noriyasu Akashio

Title: Noriyasu Akashio: Innovator in Optical Disc Technology

Introduction

Noriyasu Akashio is a notable inventor based in Saku, Japan. He has made significant contributions to the field of optical disc technology. His innovative approach has led to advancements that enhance the performance and quality of optical discs.

Latest Patents

Akashio holds a patent for an optical disc and a method for making it. The patent describes a process where resin, typically polycarbonate, is injection molded into a disc substrate under specific conditions. These conditions include a mold temperature of 100-160 degrees Celsius, an injection velocity of 100-120 g/sec, and a pressure of 10-60 kg/cm². This method ensures that the birefringence of a radially inner portion of the substrate is higher by about 15-50 nm than the remaining substrate. A center hole is perforated in the substrate, and a hub is attached around this hole. The result is a uniform distribution of birefringence over the entire area, which avoids any increase in DC modulation.

Career Highlights

Akashio is associated with TDK Corporation, a leading company in electronic components and systems. His work at TDK has allowed him to focus on developing innovative solutions in optical technology. His contributions have been instrumental in advancing the capabilities of optical discs.

Collaborations

One of his notable coworkers is Tsuneo Kuwahara. Their collaboration has likely contributed to the success of various projects within TDK Corporation.

Conclusion

Noriyasu Akashio's work in optical disc technology exemplifies the impact of innovation in the electronics industry. His patent reflects a commitment to enhancing the quality and performance of optical media. His contributions continue to influence the field and pave the way for future advancements.