Susumu Ohkawachi

Title: The Innovations of Susumu Ohkawachi

Introduction

Susumu Ohkawachi is a notable inventor based in Odawara, Japan. He has made significant contributions to the field of photography through his innovative patents. With a total of 4 patents, Ohkawachi has focused on developing advanced photographic materials that enhance image quality.

Latest Patents

One of his latest patents is a silver halide color photographic light-sensitive material. This invention comprises a support and several silver halide emulsion layers, including yellow, magenta, and cyan image forming emulsions. Notably, at least one of these layers contains a fourth silver halide emulsion, which has a spectral sensitivity wavelength region at least six times higher than that of the other emulsions. This innovation allows for an optical density after development of 0.7 or more. Another significant patent is a silver halide color photographic light-sensitive material designed to improve color proofing. This material includes a support with mainly yellow, magenta, and cyan image forming layers. The exposure conditions are carefully controlled to ensure that the reflection densities in specific wavelengths are not less than 0.8 before developing.

Career Highlights

Throughout his career, Ohkawachi has worked with prominent companies in the photography industry, including Konishiroku Photo Industry Co., Ltd. and Konica Corporation. His work has been instrumental in advancing photographic technology and materials.

Collaborations

Ohkawachi has collaborated with notable individuals in the field, including Yasuo Tosaka and Hajime Komatsu. These collaborations have contributed to the development of innovative photographic solutions.

Conclusion

Susumu Ohkawachi's contributions to the field of photography through his patents demonstrate his commitment to innovation and excellence. His work continues to influence the industry and improve the quality of photographic materials.