Takao Sumiyoshi is a distinguished inventor based in Tokyo, Japan, known for his significant contributions to the field of colorimetric technology. With a total of three patents to his name, he has developed innovative methods and apparatuses that enhance the understanding and evaluation of color perception and measurement.

Latest Patents

Sumiyoshi's latest patents include an "Illumination Variable Colorimetric Method and Colorimeter." This invention enables the comparison of color appearance through visual sense and calorimetric values. The method features an illumination adjustment mechanism and a light receiver integrated into the optical measurement path. By adjusting illumination to a predetermined level during standard adjustments, users can measure variations in hue, saturation, and lightness more accurately.

Another notable patent is the "Color Indication Comparison Method." This method allows for an accurate determination of the color difference between two similar colors. It includes steps such as determining tristimulus values of a reference color, creating a planar chromaticity diagram, and plotting equi-hue and equi-saturation lines. This systematic approach enables users to visualize differences in color attributes concerning brightness, facilitating more precise color comparisons.

Career Highlights

Throughout his career, Takao Sumiyoshi has lent his expertise to well-regarded companies, including Suga Test Instruments Co., Ltd. and Suga Test Instruments. His experience with such prominent organizations highlights his capability in advancing color measurement technologies and reflects his dedication to innovation within this specialized field.

Collaborations

Takao has also collaborated with notable individuals such as Hiroshi Matsuki and Kiyoshi Chaki. These partnerships have contributed to the development and refinement of his groundbreaking inventions, showcasing the value of teamwork in the pursuit of technological advancements.

Conclusion

In conclusion, Takao Sumiyoshi's contributions to colorimetric methods are critically significant, reflecting both his innovative spirit and technical expertise. His patents not only further our understanding of color perception but also provide valuable tools for industries reliant on precise color measurement. As he continues his work, the impact of his inventions will undoubtedly resonate within the scientific community and various applicative sectors.

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