Location History:
- Tokyo, JP (1998)
- Nagano, JP (1998 - 2000)
Company Filing History:
3 out of 264 
1 out of 307 Years Active: 1998-2000
Title: Ken Ishikawa: Innovator in Optical Technology
Introduction
Ken Ishikawa is a notable inventor based in Nagano, Japan. He has made significant contributions to the field of optical technology, particularly in the development of optical pickup head apparatuses. With a total of 4 patents to his name, Ishikawa's work has had a lasting impact on how information is read from recording media.
Latest Patents
One of Ishikawa's latest patents is an optical pickup head apparatus designed for reading information signals from a recording medium. This innovative apparatus includes a laser beam light source, an objective lens, and a photodetector. The improvement in this design features a holographic optical element constructed from a pair of diffraction gratings with different diffractive conditions. The element is split into two by a split line near its optical axis, serving as a border. Additionally, it incorporates a diffraction generation prevention device to avoid the generation of unwanted diffracted beams from the recording medium. The optical pickup head apparatus effectively irradiates a laser beam emitted from the light source onto the recording medium through the holographic optical element and the objective lens. Beams reflected from the recording medium are then guided to the photodetector via the objective lens and the holographic optical element.
Career Highlights
Throughout his career, Ken Ishikawa has worked with prominent companies such as Sankyo Seiki Mfg. Co., Ltd and Kabushiki Kaisha Sankyo Seiki Seisakusho. His experience in these organizations has allowed him to refine his skills and contribute to advancements in optical technology.
Collaborations
Ishikawa has collaborated with notable colleagues, including Tadashi Takeda and Yoshio Hayashi. These partnerships have fostered innovation and creativity in his projects.
Conclusion
Ken Ishikawa's contributions to optical technology through his patents and collaborations highlight his role as a significant inventor in the field. His work continues to influence the development of optical systems and devices.
Inventor’s Patent Attorneys refers to legal professionals with specialized expertise in representing inventors throughout the patent process. These attorneys assist inventors in navigating the complexities of patent law, including filing patent applications, conducting patent searches, and protecting intellectual property rights. They play a crucial role in helping inventors secure patents for their innovative creations.