This inventor holds 35 USPTO granted patents and 1 EPO patent, primarily in Magneto-Optical Recording. Top assignees: Sharp Kabushiki Kaisha Corporation, Other. Active years: 1994-2009.
Data source: USPTO (United States Patent and Trademark Office) public patent records. Weekly synchronization. How IDiyas builds this profile
Location History:
- Yamatotakada-shi Nara, JP (2002)
- Yamatotakada, JP (1994 - 2003)
- Kashihara, JP (1997 - 2009)
Company Filing History:
34 out of 25,954 
1 out of 834,513 Years Active: 1994-2009
Areas of Expertise:
Title: The Innovative Contributions of Junsaku Nakajima
Introduction
Junsaku Nakajima, a prolific inventor hailing from Kashihara, Japan, has made significant contributions to the field of optical recording technologies. With a remarkable portfolio of 35 patents, Nakajima has played a key role in advancing the efficiency and capacity of optical storage media.
Latest Patents
Among Nakajima's latest inventions is an optical recording medium recorded with information in the depth direction, along with its associated method and apparatus for reproduction. This innovation involves an optical disk featuring a lead-in region at the inner circumference and a user region at the outer circumference. A string of pits of varying depths is meticulously formed in the lead-in region, enhancing the recording capacity by utilizing depth to convey information. Through the detection of light beams reflected from the pit strings, a ternary signal is restored based on the output from the differential amplifier and addition amplifier.
Additionally, Nakajima has developed an optical disk reproducing apparatus designed to interpret disks with pits of distinct depths. In this setup, a photoreceptor element detects the quantity of light reflected from the pits, which informs a pit depth detecting unit of each pit's depth. This information is crucial for generating a tracking servo signal, enabling precise reproduction of data stored within the optical disk.
Career Highlights
Junsaku Nakajima has been associated with notable companies such as Sharp Corporation, where he honed his skills in innovating optical recording technologies. His expertise in this field has led to advances that have reshaped how data is recorded and accessed, contributing to a more efficient overall user experience.
Collaborations
Throughout his career, Nakajima has collaborated with esteemed colleagues like Akira Takahashi and Yoshiteru Murakami. These partnerships have facilitated the exchange of ideas and propelled further innovations in optical technology, showcasing the importance of teamwork in the realm of invention.
Conclusion
Junsaku Nakajima's work continues to influence the landscape of optical recording technologies. With a wealth of patents and a proven track record of collaboration, Nakajima remains a significant figure in the field. His inventions not only enhance the storage capacity of optical disks but also exemplify the innovative spirit that drives technological advancement.
Data source: USPTO (United States Patent and Trademark Office) public patent records. Weekly synchronization. How IDiyas builds this profile