Takeshi Tsujimura

Title: Takeshi Tsujimura: Optical Communications and Conduit Measurement Inventions.

Introduction

Takeshi Tsujimura is an inventor associated with Ibaraki, Japan. His work includes inventions in optical communications and conduit measurement, and he is credited with 3 patents.

Latest Patents

Method of Switching Optical Path, and Apparatus Thereof. This invention describes a method for adjusting the optical path length of a detour line to compensate for differences between it and an in-service line. Optical couplers split and recombine chirped pulse light traveling through the two lines, while an optical oscilloscope measures the resulting waveform. The line length is adjusted to reduce interference in the waveform or bring its interference frequency to zero.

Method and Apparatus for Measuring Length of Conduit and for Diagnosing. This invention measures conduit length by using airflow to propel a filamentary body through the conduit. A detector identifies when the body reaches the outlet, and the inserted length of the filamentary body is used to determine the conduit’s length. The apparatus includes an air supply, a wire fitted with elastic, large-diameter members, and an outlet-arrival detector.

Career Highlights

Tsujimura’s listed company affiliations include Nippon Telegraph and Telephone Corporation and Sumitomo Electric Industries, Limited. His patent work spans optical-path switching and practical methods for measuring and diagnosing conduits.

Collaborations

His listed coworkers include Hiroaki Sano and Tetsuro Yabuta, reflecting collaborative connections in his professional work.

Conclusion

Takeshi Tsujimura’s inventions address distinct engineering challenges, from managing optical signals across dualized lines to measuring conduit length with an airflow-driven filamentary body.