Location History:
- Hiroshima, JP (1991)
- Higashihiroshima, JP (1991 - 1993)
Company Filing History:
Years Active: 1991-1993
Title: Koji Yoshifusa: Innovator in Optical Technology
Introduction
Koji Yoshifusa is a prominent inventor based in Higashihiroshima, Japan. He has made significant contributions to the field of optical technology, holding a total of 3 patents. His work focuses on developing advanced optical pickup devices that utilize holographic optical elements.
Latest Patents
Yoshifusa's latest patents include an optical pickup device that employs a holographic optical element. This device consists of a light source, a lens system that converts the optical beam from the light source onto a recording carrier, and a photodetector that detects reflected light from the recording carrier. Additionally, it features a diffraction grating that introduces the reflected light to the photodetector along a light path connecting the recording carrier and the light receiving element. The photodetector is equipped with a photodiode and a signal processing circuit that amplifies the output signal of the photodiode.
Another notable patent is a semiconductor chip detecting device designed for focusing purposes. This photo detecting device incorporates a photoelectric converting element formed on a semiconductor chip, which is divided into first and second light receiving regions. The device also includes a signal processing circuit on the same chip, featuring a subtracting element that subtracts the output signal from the second light receiving region from that of the first.
Career Highlights
Koji Yoshifusa is currently employed at Sharp Kabushiki Kaisha Corporation, where he continues to innovate in the field of optical technology. His work has been instrumental in advancing the capabilities of optical devices, particularly in the areas of data storage and retrieval.
Collaborations
Yoshifusa has collaborated with notable colleagues such as Taizo Yokota and Toshiya Nagahama. Their combined expertise has contributed to the successful development of cutting-edge optical technologies.
Conclusion
Koji Yoshifusa is a key figure in the realm of optical technology, with a focus on innovative devices that enhance data processing and retrieval. His contributions through patents and collaborations continue to shape the future of optical applications.