Toyohito Asanuma

Title: Toyohito Asanuma: Innovator in Optical Disk Technology

Introduction

Toyohito Asanuma is a notable inventor based in Yokohama, Japan. He has made significant contributions to the field of optical disk technology, holding a total of 3 patents. His work has advanced the methods of producing optical disks, which are essential in various data storage applications.

Latest Patents

Asanuma's latest patents include innovative designs for optical disks. One of his patents describes an optical disk that consists of a reflective layer, a recording layer, an optical-transparent bonding layer, and an optical transparent sheet, all laminated on a substrate. The total thickness of the optical-transparent bonding layer and the optical transparent sheet is precisely 0.1 mm. Additionally, the patent specifies that the peak-to-peak height of wrinkles formed on the sheet is 2.5 µm or lower. The production method involves radiating a first ultraviolet ray to the optical transparent sheet at a specific energy level, followed by the application of ultraviolet hardened resin to form the bonding layer.

Another patent focuses on an optical disk featuring land pre-pits (LPP) and variable groove depths. In this design, the LPP is strategically formed between shallow grooves or pits, with a specific displacement from the centerline of the land. The laser beam power used for forming adjacent shallow grooves or pits is intentionally reduced to enhance the quality of the optical disk.

Career Highlights

Toyohito Asanuma is currently associated with the Victor Company of Japan, Limited, where he continues to innovate in optical technologies. His expertise in optical disk production has positioned him as a key figure in the industry.

Collaborations

Asanuma has collaborated with notable colleagues, including Kenichi Shimomai and Takayuki Deno. Their combined efforts have contributed to advancements in optical disk technology.

Conclusion

Toyohito Asanuma's contributions to optical disk technology through his patents and collaborations highlight his role as an influential inventor in the field. His innovative approaches continue to shape the future of data storage solutions.