Location History:
- Kanagawa-ken, JP (2000)
- Yokohama, JP (1989 - 2002)
Company Filing History:
Years Active: 1989-2002
Title: **Innovative Contributions of Hajime Ichikawa in Optical Engineering**
Introduction
Hajime Ichikawa, an accomplished inventor based in Yokohama, Japan, has significantly contributed to the field of optical engineering through his innovative inventions. With a remarkable portfolio of 8 patents, Ichikawa plays a vital role in advancing measurement technologies essential for the development of optical systems.
Latest Patents
Ichikawa’s latest patents showcase his expertise in interferometry and optical system manufacturing. One of his standout inventions includes a method for manufacturing a projection optical system for projecting patterns from a reticle to a photosensitive substrate. This sophisticated method involves a surface-shape-measuring step that utilizes interference between light from an optical test surface and light from an aspheric reference surface, ensuring precise measurements. Additionally, it incorporates a wavefront-aberration-measuring step, where the wavefront aberration of the assembled projection optical system is evaluated. Following this, a surface correction calculation step determines the necessary adjustments to the optical test surface based on the acquired wavefront aberration data.
Another significant invention involves apparatus and methods for measuring the surface topography of test surfaces, particularly spherical or aspherical surfaces of optical elements. By detecting interference fringes created through the interaction of reference and measurement light beams, Ichikawa's invention accurately determines the profile of the test surface. This technology is crucial in enhancing the precision and quality of optical manufacturing processes.
Career Highlights
Hajime Ichikawa is affiliated with Nikon Corporation, a leading company in the optical industry. His work at Nikon showcases his commitment to innovation in optical engineering, and his contributions have been instrumental in developing advanced measurement systems. With a focus on precision and accuracy, Ichikawa continues to influence the direction of optical technology.
Collaborations
Throughout his career, Ichikawa has collaborated with other skilled professionals in the industry, including noteworthy coworkers Shigeru Nakayama and Makoto Uehara. These partnerships highlight the collaborative spirit within the field of optical engineering, enabling the exchange of ideas and advancements in technology.
Conclusion
Hajime Ichikawa's remarkable contributions to the optical engineering field underline the significance of innovations in measurement technology. With his extensive patent portfolio and successful collaborations, Ichikawa not only advances the capabilities of Nikon Corporation but also enhances the future of optical systems. His work continues to inspire and pave the way for further advancements in the industry.
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.