Saburo Funada

Title: The Innovations of Saburo Funada

Introduction

Saburo Funada is a prominent inventor based in Tokyo, Japan. He has made significant contributions to the field of optical data recording and reproduction. With a total of 5 patents, Funada's work has advanced the technology used in laser control circuits and focus servo control devices.

Latest Patents

One of Funada's latest patents is a laser control circuit for optical data recording/reproduction apparatus. This innovative laser controller includes a detector for measuring the intensity of a laser beam emitted from a laser. It features a servo controller that compares the detected value with a reference value, generating a feedback signal based on the difference. Additionally, a drive circuit supplies a drive signal corresponding to the feedback signal to the laser, while a modulator modulates the drive signal during recording. The controller is equipped with a RAM, timer, and temperature sensor, enhancing its functionality during reproduction and erasing processes.

Another notable patent is the focus servo control device for optical disks, which addresses servo offset errors. This device includes a focus driver that operates an optical system with an objective lens. A servo control section detects when the optical system is within the focus servo control range. The focus servo control loop is activated based on a detection signal, allowing the optical system to be driven under servo control until the maximum amount of light reflected by the optical disk is detected.

Career Highlights

Funada is currently employed at Olympus Optical Company, Ltd., where he continues to innovate in the field of optical technology. His work has been instrumental in enhancing the performance and reliability of optical data systems.

Collaborations

Throughout his career, Funada has collaborated with notable colleagues, including Shoji Yoshikawa and Masanori Doi. These partnerships have contributed to the development of advanced optical technologies.

Conclusion

Saburo Funada's contributions to optical data recording and reproduction have significantly impacted the industry. His innovative patents and collaborations reflect his dedication to advancing technology in this field.