Company Filing History:
1 out of 2,528 
1 out of 12 Years Active: 1993
Title: Shigetoshi Fujiwara: Innovator in Optical Filter Technology
Introduction
Shigetoshi Fujiwara is a notable inventor based in Hachioji, Japan. He has made significant contributions to the field of optical filter technology, particularly with his innovative designs that enhance solarization resistance and improve wavelength distribution.
Latest Patents
Fujiwara holds a patent for an optical filter structure that efficiently cuts off infrared light, including near-infrared and ultraviolet light, while allowing visible light to pass through. This optical filter structure features a glass filter made of phosphate or fluorophosphate glass, which contains 0.1 to 5% by weight of copper oxide. The design includes an aquafilter with a liquid layer measuring 3 to 50 mm in light path length. The optical characteristics of this filter ensure that the absorption edge on the short wavelength side is between 250 to 330 nm, and the maximum spectral transmittance beyond 780 nm does not exceed 40%. Fujiwara's patent represents a significant advancement in optical technology, with 1 patent to his name.
Career Highlights
Throughout his career, Shigetoshi Fujiwara has worked with prominent companies such as Hoya Corporation and Dainippon Plastics Co., Ltd. His experience in these organizations has contributed to his expertise in optical technologies and innovations.
Collaborations
Fujiwara has collaborated with notable colleagues, including Yoshio Kishima and Tadasu Inoue. These partnerships have likely fostered a creative environment that has led to advancements in their respective fields.
Conclusion
Shigetoshi Fujiwara's contributions to optical filter technology highlight his innovative spirit and dedication to improving the efficiency of light transmission. His work continues to influence advancements in the field, showcasing the importance of innovation in technology.