Location History:
- Kobe, JP (1984)
- Kawasaki, JP (1993 - 1999)
Company Filing History:
Years Active: 1984-1999
Title: The Innovations of Masaji Dohi
Introduction
Masaji Dohi is a prominent inventor based in Kawasaki, Japan. He has made significant contributions to the field of infrared detection technology. With a total of 5 patents to his name, Dohi's work has advanced the capabilities of image sensing devices.
Latest Patents
One of Dohi's latest patents is an infrared detection device comprising a pyroelectric thin film and method. This invention involves a solution of precursor of a pyroelectric material, such as BaSrTiO.sub.3, which is coated on a silicon wafer surface. The process includes drying the coating and subjecting it to heat treatment to convert it into a pyroelectric thin film. The internal stress in the film, formed as thick as 1 μm, is concentrated in the grooves between mesas, limiting cracks and ensuring the portions on the mesas remain intact. This innovation results in an infrared image sensing device with sensor elements that exhibit uniform characteristics and high reliability.
Another notable patent is an image signal processing method and device. This method generates a high-contrast display signal by processing an image signal acquired from cameras, including infrared or X-ray cameras. The process involves dividing the screen into polygons, interpolating signal intensities, and transforming high-frequency component signal intensities into display signal intensities. This sophisticated approach enhances the quality of the displayed images.
Career Highlights
Masaji Dohi is currently associated with Fujitsu Corporation, where he continues to innovate in the field of technology. His work has not only contributed to the advancement of infrared detection but has also paved the way for improved image processing techniques.
Collaborations
Dohi has collaborated with notable colleagues, including Satoshi Kawata and Yoichiro Sakachi. Their combined expertise has further enriched the research and development efforts in their respective fields.
Conclusion
Masaji Dohi's contributions to infrared detection and image processing technologies highlight his role as a leading inventor in Japan. His innovative patents reflect a commitment to advancing technology and improving device reliability.