Haruhiko Takemura

Title: Haruhiko Takemura: Innovator in Optical Technology

Introduction

Haruhiko Takemura is a notable inventor based in Hachioji, Japan. He has made significant contributions to the field of optical technology, holding a total of four patents. His work primarily focuses on advancements in optical heads and laser devices.

Latest Patents

One of Takemura's latest patents is an optical head with a built-in semiconductor laser, objective lens, and a 1/4 wavelength plate. This innovative optical head features a semiconductor laser that emits light, a collimator lens that converts the light into a parallel beam, and a semiconductor substrate that reflects the light beam. The objective lens is designed to focus the reflected light beam onto an optical disk. Additionally, a beam splitter is included to transmit the laser light and reflect the returning light from the disk. The optical path for the returning light is further enhanced by a collective lens, a cylindrical lens, and an optical detector. A light receiving element on the semiconductor substrate outputs a signal corresponding to the intensity of the received light, while a polarizing film is formed on its surface.

Another significant patent is a light source degradation detecting apparatus for a laser device. This apparatus monitors drive currents and output laser beams, featuring drivers that supply three drive signals to the laser. A photodiode detects the laser outputs produced in response to these drive signals. The apparatus includes a memory for storing measured values and drive signals, along with a discriminator that calculates the ratio of laser outputs based on the stored data.

Career Highlights

Haruhiko Takemura is currently employed at Olympus Optical Company, Ltd., where he continues to innovate in the field of optical technology. His work has contributed to the advancement of laser devices and optical systems, enhancing their performance and reliability.

Collaborations

Throughout his career, Takemura has collaborated with notable colleagues, including Masaharu Sakamoto and Tsuneo Yanagida. These collaborations have fostered a creative environment that has led to significant advancements in their respective fields.

Conclusion

Haruhiko Takemura's contributions to optical technology through his patents and collaborations highlight his role as a leading inventor in the industry. His innovative work continues to influence advancements in laser devices and optical systems.