Tadatoshi Higashi

Title: The Innovations of Tadatoshi Higashi

Introduction

Tadatoshi Higashi is a notable inventor based in Yokohama, Japan. He has made significant contributions to the field of lighting technology, particularly through his innovative designs in discharge lamps. With a total of 2 patents, his work has had a considerable impact on the industry.

Latest Patents

Higashi's latest patents include a metal halide discharge lamp suitable for an optical light source. This lamp operates from a D.C. power source and features a quartz arc tube. The design incorporates anode and cathode electrodes within the arc tube, with a short gap length between them, allowing the lamp to function as a point light source. The arc tube is filled with an inert gas, mercury, and metal halide additives, including metal bromine. This innovative design prevents the transformation of silica (SiO.sub.2) in the arc tube to cristobalite or the formation of an opaque substance, thanks to the catephoresis effects. The atomic percent of bromine to halogen in the arc tube ranges from about 60% to 90%, and the wall load developed in the arc tube is significantly greater than 40 W/cm.sup.2. Additionally, his short arc discharge lamp can be made so small in diameter that it appears like a spot, enhancing both the illuminance efficiency and brightness.

Career Highlights

Higashi is currently employed at Toshiba Lighting & Technology Corporation, where he continues to innovate in the field of lighting technology. His work has been instrumental in advancing the capabilities of discharge lamps, making them more efficient and effective for various applications.

Collaborations

Throughout his career, Higashi has collaborated with talented individuals such as Takahiro Sugimoto and Akihiro Ueda. These collaborations have contributed to the development of cutting-edge technologies in the lighting sector.

Conclusion

Tadatoshi Higashi's contributions to the field of lighting technology through his patents and collaborations highlight his role as an influential inventor. His innovative designs continue to shape the future of optical light sources.