Location History:
- Aizuwakamatsu, JP (1987)
- Tokyo, JP (1997 - 2019)
Company Filing History:
Years Active: 1987-2019
Title: Seiji Kumagai: Innovator in Optical Technology
Introduction
Seiji Kumagai is a prominent inventor based in Tokyo, Japan. He has made significant contributions to the field of optical technology, holding a total of 3 patents. His work focuses on developing advanced materials and methods that enhance optical instruments.
Latest Patents
Kumagai's latest patents include an inorganic polarizing plate and a method of manufacturing the same. This innovative inorganic polarizing plate features a wire grid structure that consists of a transparent substrate and grid-shaped protrusions. These protrusions are arranged at a pitch shorter than the wavelength of light in the use band. The design includes a reflection layer and a reflection suppressing layer, which contains both dielectric and non-dielectric materials. The content of the non-dielectric material increases as the distance from the reflection layer increases. Additionally, he has developed a copper alloy sheet for connectors, which has a specific chemical composition tailored for forming connectors.
Career Highlights
Throughout his career, Seiji Kumagai has worked with notable companies such as Mitsubishi Shindoh Co., Ltd. and Dexerials Corporation. His experience in these organizations has allowed him to refine his expertise in materials science and optical engineering.
Collaborations
Kumagai has collaborated with esteemed colleagues, including Rensei Futatsuka and Takeshi Suzuki. Their joint efforts have contributed to advancements in optical technologies and materials.
Conclusion
Seiji Kumagai's innovative work in optical technology and materials science has led to significant advancements in the field. His patents reflect a commitment to enhancing optical instruments and connectors, showcasing his expertise and dedication to innovation.