Tomohisa Kishi

Title: The Innovative Mind of Tomohisa Kishi

Introduction

Tomohisa Kishi is a notable inventor based in Moriguchi, Japan. He has made significant contributions to the field of optical encoders, showcasing his expertise and innovative spirit. His work has led to the development of a unique patent that enhances the functionality of optical detection systems.

Latest Patents

Kishi holds a patent for an "Optical Encoder for Detection Having a Moving Reference Point." This invention provides an optical encoder capable of utilizing the recesses and convexes of a movable plate and a fixed plate to accurately generate a Z phase signal in synchronism with an A/B phase signal. The technology employs phase-type diffraction gratings on both the moving and fixed plates, which include multiple tracks with varying grating pitches. This design allows parallel coherent beams to interfere, enabling the light receiving part to detect light intensity and obtain several synchronous signals with different periods. Additionally, the light receiving part captures light spots formed by condensing elements on the movable plate, generating a single pulse per rotation as a reference position. The invention effectively selects one of the synchronous signals with the shortest period as the A/B phase signal, which is dependent on the movement of the movable plate. The combination of the reference position signal and the synchronous signals results in a Z phase signal that indicates the origin of the movable plate, thus achieving synchronization with the A/B phase signal.

Career Highlights

Tomohisa Kishi is associated with Matsushita Electric Industrial Co., Ltd., a company renowned for its advancements in electronics and technology. His work at this esteemed organization has allowed him to push the boundaries of optical encoder technology.

Collaborations

Kishi has collaborated with notable colleagues, including Kazumasa Takata and Kanji Nishii. Their combined efforts have contributed to the innovative projects at Matsushita Electric Industrial Co., Ltd.

Conclusion

Tomohisa Kishi's contributions to the field of optical encoders exemplify his innovative spirit and dedication to advancing technology. His patent reflects a significant step forward in optical detection systems, showcasing the potential for further advancements in this area.