Hisako Arai

Title: Hisako Arai: Innovator in Optical Technologies

Introduction

Hisako Arai is a prominent inventor based in Kashiwa, Japan. She has made significant contributions to the field of optical technologies, holding a total of 4 patents. Her innovative work focuses on enhancing image sensor technology, which has applications in various industries.

Latest Patents

Among her latest patents is a color image sensor and a production method of an optical waveguide array. This color image sensor utilizes a white fluorescent tube as a light source, combined with a microlens array featuring three rows of microlenses arranged vertically. It also incorporates a three-layer optical waveguide array and a three-line color CCD equipped with color filters. The design of the waveguides in each layer is such that the interval between successive waveguides narrows from the input end toward the output end. The three-line color CCD consists of three lines of light-receiving elements (photodiodes) arranged vertically, matching the intervals of the waveguide layers. Additionally, a cylindrical lens is attached to cover the microlens array, ensuring that the images of light beams incident on different microlenses correspond to the same area on the original.

Another notable invention is the optical waveguide reduction optical image sensor. This device is constituted by a polymeric optical waveguide array with multiple cores arranged in a one-dimensional array within a cladding substrate. It features a photoelectric conversion element array that detects light propagating through the polymeric optical waveguide array and converts it into an electrical signal. A hollow thermal expansion suppressing member is mounted at the joint between the polymeric optical waveguide array and the photoelectric conversion element array. This member has a coefficient of linear thermal expansion that is smaller than that of the polymeric optical waveguide array in the same direction.

Career Highlights

Hisako Arai is currently employed at Sharp Kabushiki Kaisha Corporation, where she continues to innovate in the field of optical technologies. Her work has garnered attention for its potential to improve image sensing capabilities in various applications.

Collaborations

Throughout her career, Arai has collaborated with notable colleagues, including Yoshiyuki Masuda and Ryusuke Kita. These collaborations have contributed to the advancement of her research and the successful development of her patents.

Conclusion

Hisako Arai is a trailbl