Norikazu Arai

Title: Norikazu Arai: Innovator in Optical Systems

Introduction

Norikazu Arai is a prominent inventor based in Komae, Japan. He has made significant contributions to the field of optical systems, holding a total of six patents. His work focuses on improving the efficiency and functionality of optical devices.

Latest Patents

One of Arai's latest patents is an optical system for recording and reproducing optical information. This system utilizes a semiconductor laser as a light source, which produces an approximately parallel luminous flux through a collimator lens. The light is then converged on a recording surface by an objective lens. Arai addresses the issue of mode hops in semiconductor lasers that can lead to errors due to chromatic aberration in the objective lens. He proposes using a collimator lens with reverse chromatic aberration, allowing for the use of various conventional objective lenses without error.

Another notable patent is a projection lens designed for a three-tube television projector. This lens configuration includes a plastic first lens with minimal refracting power, a glass second lens, and two additional plastic lenses positioned before the CRT faceplate. The design incorporates large spaces between the lenses to accommodate reflecting mirrors, and the fourth lens can be formed from a liquid lens to reduce costs.

Career Highlights

Norikazu Arai is associated with Konishiroku Photo Industry Co., Ltd., where he has contributed to advancements in optical technology. His innovative designs have played a crucial role in enhancing the performance of optical systems used in various applications.

Collaborations

Arai has collaborated with notable colleagues, including Shozo Ishiyama and Tadashi Kojima. Their combined expertise has fostered a creative environment that encourages the development of cutting-edge optical solutions.

Conclusion

Norikazu Arai's contributions to optical systems demonstrate his commitment to innovation and excellence in technology. His patents reflect a deep understanding of optical principles and a drive to improve existing technologies. Arai's work continues to influence the field and inspire future advancements in optical engineering.