Hirofumi Katami

Title: **Innovations by Hirofumi Katami: Pioneering Advances in Optical Technology**

Introduction

Hirofumi Katami, an accomplished inventor located in Ibaraki, Japan, has made significant contributions to the field of optical technologies. With a remarkable portfolio of 11 patents, Katami's work primarily focuses on enhancing the durability and performance of polarizing plates and optical elements. His latest innovations are paving the way for improved image display devices with exceptional reliability.

Latest Patents

Among Katami's latest patents is a **polarizing plate with a retardation layer and image display device**. This invention provides a solution for achieving image display apparatuses characterized by excellent durability, weatherability, and hue quality. The innovation incorporates a polarizing plate with a protective layer and a polarizer, along with a retardation layer and a pressure-sensitive adhesive layer. Specifically, the protective layer is designed to have a light transmittance of 10% or less at a wavelength of 380 nm, while the polarizing plate and pressure-sensitive adhesive layer further optimize light transmittance.

Another notable patent is a **laminate of optical elements having a layer of a pressure-sensitive adhesive**, which details a transparent first optical element and a second optical element joined by a transparent pressure-sensitive adhesive layer. This adhesive layer features both a base adhesive zone and a refractive index-adjusting zone, ensuring optimal bonding between elements while maintaining transparency and functionality.

Career Highlights

Hirofumi Katami's career is highlighted by his affiliation with Nitto Denko Corporation, where he applies his expertise to develop cutting-edge optical technologies. His contributions have not only enhanced the company's product portfolio but have also helped set industry standards for optical performance.

Collaborations

Throughout his career, Katami has collaborated with esteemed professionals, including Atsushi Yasui and Takahiro Nonaka. These collaborations have been instrumental in advancing their joint research and innovations in optical technologies, thereby solidifying their positions as leaders in the field.

Conclusion

Hirofumi Katami's inventive spirit and dedication to improving optical technologies are exemplified through his patents and collaborations. As he continues to innovate within Nitto Denko Corporation, his contributions will undoubtedly play a crucial role in shaping the future of image display devices and optical elements.