Kenichi Kojima

Title: Kenichi Kojima: Inventor in Photoelectric Encoder Technology

Introduction

Kenichi Kojima is an inventor based in Kawasaki, Japan. His work includes technologies for photoelectric encoders, which use optical patterns to measure position or movement. He is associated with Mitutoyo Corporation and is credited with 2 patents.

Latest Patents

Kojima’s listed patents address the design and manufacture of scales used in photoelectric encoders.

“Photoelectric Encoder and Method of Manufacturing Scales” describes forming a tungsten layer on a scale substrate and adding a chromium layer above it. Using a resist mask and the tungsten layer as an etching stopper, selected portions of the chromium are removed to create an optical grating.

“Scale for Reflective Photoelectric Encoder and Reflective Photoelectric Encoder” concerns a scale whose phase gratings have no reflective film on their side faces. It specifies an edge angle greater than 80 degrees and less than 90 degrees, a design intended to help maintain stable diffraction efficiency despite variations in grating shape and size.

Career Highlights

Kojima’s listed patent work focuses on optical encoder scales, including grating fabrication and reflective encoder performance. His association with Mitutoyo Corporation connects this work to a company known for precision measurement technologies.

Collaborations

Kojima’s listed coworkers include Takashi Kanno and Atsushi Tominaga. The available information identifies them as coworkers but does not specify their roles in the patents.

Conclusion

Kenichi Kojima’s patent contributions center on manufacturing optical gratings and improving the consistency of reflective photoelectric encoder scales.