Location History:
- Ooimachi,, JP (1978)
- Tokyo, JP (1980)
- Ooi, JP (1982)
- Ibaragi, JP (1983 - 1984)
- Sakura, JP (1983 - 1984)
- Ibaraki, JP (1984 - 1985)
- Tsukuba, JP (1991)
Company Filing History:
8 out of 1,430 
6 out of 348 
3 out of 10,092 
Years Active: 1978-1991
Introduction
Junichi Shimada is a prominent inventor based in Ibaraki, Japan, renowned for his contributions to the field of optics. With a remarkable portfolio of 11 patents, Shimada has significantly influenced the development of advanced optical devices that enhance light manipulation and control.
Latest Patents
One of Shimada's latest inventions is the **Spherical Lens for Spherically Symmetrical Graded Refractive Index**. This innovative lens features a core with an uneven refractive index shaped like a sphere or hemisphere, complemented by spherical shell and rod clads on its periphery. The design utilizes the negative aberration characteristic of the core and the positive aberration characteristics of the clads to create a lens that effectively corrects aberrations. This technology is particularly valuable for integration with other optical elements, allowing for the efficient convergence of light beams, making it ideal for applications such as optical pickups.
Another significant invention by Shimada is the **Semiconductor Laser Device**. This device uses a semiconductor laser with an antireflection coating that enables the emitted laser beam to return to its output end face, facilitating self-coupling effects. By controlling the polarization characteristics of the return beam, the output beam's polarization can be effectively altered, enhancing the overall performance of the laser device.
Career Highlights
Shimada's career includes notable positions within prestigious organizations. He has worked with the **Agency of Industrial Science and Technology** and the **Ministry of International Trade and Industry**, where he contributed to the advancement of industrial science and technology in Japan.
Collaborations
Throughout his career, Junichi Shimada has collaborated with esteemed colleagues, including Kenjiro Sakurai and Yoshinobu Mitsuhashi. These partnerships have contributed to the successful development of various innovations within the optical field.
Conclusion
Junichi Shimada stands out as a visionary inventor in optics, with his groundbreaking patents paving the way for future advancements in laser technology and optical devices. His work not only showcases his innovative spirit but also reflects a commitment to enhancing the capabilities of modern optical applications.