Introduction: Shunji Umemura is a highly regarded inventor based in Hotaka-machi, Japan, known for his contributions to the field of optical engineering. With a remarkable portfolio of 12 patents, Umemura has made significant advancements in projection lens technology, showcasing his expertise and innovation.

Latest Patents: Among his latest patents, Shunji Umemura has developed a revolutionary projection lens and a method for producing it. The innovative projection lens comprises a cylindrical exterior case with a lens-shifting through-hole, and an inner circumferential step or flange. A critical component of this design includes a lens whose outer periphery is abutted to the inner step, alongside a flexible spacer and a retainer that holds the spacer, ensuring the lens is securely fixed within the exterior case. Additionally, Umemura has introduced a lens evaluation method and apparatus that calculates resolution evaluation values based on detected luminance values. This evaluation process includes steps for acquiring background luminance, maximum and minimum luminance values, and calculating resolution based on these metrics.

Career Highlights: Shunji Umemura has had a prominent career at Seiko Epson Corporation, where he has applied his innovative thinking and technical expertise to develop advanced projection technologies. His work has not only furthered the company's mission but has also made a lasting impact on the optical technology industry.

Collaborations: Throughout his career, Umemura has collaborated with other talented professionals, including Masashi Kitabayashi and Koichi Kojima, fostering an environment of shared knowledge and innovation that has led to his prolific patent output.

Conclusion: Shunji Umemura's dedication to innovation within the realm of optical engineering has established him as a key figure in the industry. His continued work at Seiko Epson Corporation and his numerous patents underline his commitment to advancing projection lens technology, paving the way for future innovations in the field.

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