Masami Shimizu

Title: Innovations by Masami Shimizu

Introduction

Masami Shimizu is a notable inventor based in Gunma, Japan. He has made significant contributions to the field of optical recording media, holding a total of 5 patents. His work has advanced the technology used in optical disks, enhancing their functionality and compatibility.

Latest Patents

One of his latest patents is an "Apparatus for discriminating optical recording media of different thicknesses from each other and reproducing information therefrom." This innovative apparatus features an optical pickup equipped with an objective lens that has an effective numerical aperture ranging from 0.55 to 0.65. It is designed to compatibly reproduce information from both CDs and SDs. The apparatus effectively discriminates the presence or absence of waveforms of two focus error signals detected during focus servo control. This allows for the quick and simple discrimination of various types of optical disks, which may differ in substrate thickness, track pitch, minimum pit length, and reflectivity.

Career Highlights

Masami Shimizu is currently employed at Sanyo Electric Co., Ltd., where he continues to develop innovative technologies in the field of optical media. His expertise and inventions have played a crucial role in advancing the capabilities of optical recording devices.

Collaborations

Throughout his career, Masami has collaborated with notable colleagues, including Ryoichi Kawasaki and Yoichi Tsuchiya. These collaborations have contributed to the development of cutting-edge technologies in optical recording.

Conclusion

Masami Shimizu's contributions to the field of optical recording media demonstrate his innovative spirit and technical expertise. His patents reflect a commitment to enhancing the functionality of optical disks, making significant strides in the industry.