Keizo Inagaki

Title: Keizo Inagaki: Innovator in Optical Technology

Introduction

Keizo Inagaki is a prominent inventor based in Koganei, Japan. He has made significant contributions to the field of optical technology, holding two patents that showcase his innovative spirit and technical expertise. His work focuses on enhancing the performance of optical devices, particularly in the areas of camera sensitivity and coherent optical reception.

Latest Patents

One of Inagaki's latest patents is a Time-of-Flight (TOF) camera. This invention addresses the challenge of providing a camera with high sensitivity, even when the output to the outside is weak. The camera includes a light source, a demultiplexing unit that separates light into first and second demultiplexed light, and a first modulator that modulates the first demultiplexed light to create a modulated signal. An emission unit emits this modulated signal, while a phase imparting means applies various phase shifts to the second demultiplexed light. The camera also features a multiplexing unit that combines incident light and phase-imparted local light, a light receiving element for detecting the multiplexed light, and an analysis processing unit that determines the position of a subject or the distance between the subject and the camera.

Inagaki's second patent is a common mode rejection ratio (CMRR) measurement device for coherent optical receivers, along with a corresponding measurement method. This invention provides a straightforward approach to measuring the CMRR versus frequency characteristics of an optical receiver. The method involves splitting light with a measurement frequency into two paths, generating first and second optical two-tone signals, and inputting them into a coherent receiver for measurement. The resulting electrical signals are analyzed to obtain the intensity ratios that correspond to the CMRR on both the signal light and local light sides.

Career Highlights

Keizo Inagaki is affiliated with the National Institute of Information and Communications Technology, Incorporated. His work at this esteemed institution has allowed him to push the boundaries of optical technology and contribute to advancements in the field.

Collaborations

Inagaki has collaborated with notable colleagues, including Naokatsu Yamamoto and Tetsuya Kawanishi. These partnerships have fostered a collaborative environment that enhances innovation and research in optical technologies.

Conclusion

Keizo Inagaki's contributions to optical technology through his patents and collaborations highlight his