Takakiyo Nakagami

Title: Takakiyo Nakagami: Innovator in Optical Technology

Introduction

Takakiyo Nakagami is a prominent inventor based in Tokyo, Japan. He has made significant contributions to the field of optical technology, holding a total of 2 patents. His work focuses on innovative optical switches and distributors that enhance the efficiency of light manipulation.

Latest Patents

Nakagami's latest patents include an optical switch and optical distributor using polarization control. This invention features a reflecting-type optical switch constructed by stacking a parallel plate-shaped glass substrate and a parallel plate-shaped polarization controller. The design allows incident light to propagate in a zigzag fashion due to reflection, with a polarizing separating film deposited on the glass substrate where two prescribed incident light beams intersect. Additionally, he has developed a transmission-type optical switch that incorporates a polarization controller in front of a polarizing prism. This switch also utilizes a polarizing separating film on the glass substrate of the prism where two prescribed incident light beams intersect. Furthermore, his optical distributor is constructed by stacking multiple parallel plate-shaped glass substrates and depositing a partial reflecting film on the glass substrate where two prescribed incident light beams intersect.

Another notable patent is for an optical space switch and network for such optical space switches. This invention includes a polarization controller, a beam splitter, and two reflection blocks. The polarization controller operates in two modes, maintaining the polarization of input light in the first mode and changing it by 90 degrees in the second mode. The first reflection block consists of a quarter wave plate and a light path changing element, which reflects the input light while altering its polarization. The second reflection block also contains a quarter wave plate and a mirror, returning the input light to the polarization beam splitter, where it can be emitted via designated output paths.

Career Highlights

Takakiyo Nakagami is currently employed at Fujitsu Corporation, where he continues to innovate in the field of optical technology. His work has garnered attention for its practical applications in various optical systems.

Collaborations

Some of Nakagami's notable coworkers include Tsuyoshi Yamamoto and Tamotsu Akashi, who contribute to the collaborative efforts in advancing optical technologies.

Conclusion

Takakiyo Nakagami's contributions to optical technology through his patents and work at Fujitsu Corporation highlight his role as a key innovator in the field. His inventions are paving