Ryosuke Sato — Lens Patent Author | Surface & Stop

Ryosuke Sato5 related patents across 5 interactive lens diagrams.
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Sigma Corporation (5)
Sigma Corporation(5)JP 2018-205527 A↗2018Assignee: Sigma Corporation
Inventors: Hiromichi Ochiai, Ryosuke Sato
Numerical Example 1SIGMA 16mm f/1.4 DC DN | Contemporary— 16 elements / 13 groups, f = 16.446 mm design; 16 mm marketed
JP 2020-086133 A↗2020Assignee: Sigma Corporation
Inventors: Ryosuke Sato, Takehisa Koyama
Numerical Example 6PANASONIC LUMIX S PRO 70-200mm f/4 O.I.S.— 23 ELEMENTS / 17 GROUPS, DESIGN f = 72.50-193.95 mm
JP 2021-128263 A↗2021Assignee: Sigma Corporation
Inventors: Hitoshi Murakami, Ryosuke Sato
Numerical Example 1SIGMA 65mm f/2 DG DN | Contemporary— 12 ELEMENTS / 9 GROUPS, DESIGN f = 63.10 mm
JP 2023-180574 A↗2023Assignee: Sigma Corporation
Inventors: Ryosuke Sato
Numerical Example 5SIGMA 60-600mm f/4.5-6.3 DG DN OS | Sports— 27 ELEMENTS / 19 GROUPS, DESIGN f = 62.00–580.00 mm
US 2025/0334778 A1↗2025Assignee: Sigma Corporation
Inventors: Ryosuke Sato
Numerical Example 2SIGMA 35mm f/1.2 DG II | Art— 17 ELEMENTS / 13 GROUPS, DESIGN f = 34.60 mm