Issei Tanaka — Lens Patent Author | Surface & Stop

Issei Tanaka3 related patents across 3 interactive lens diagrams.
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Nikon Corporation (3)
Nikon Corporation(3)US 2011/0170195 A1↗2011Assignee: Nikon Corporation
Inventors: Mami Muratani, Issei Tanaka
Example 1NIKON AF-S DX MICRO-NIKKOR 40mm f/2.8 G— PATENT: 9 ELEMENTS / 8 GROUPS, PRODUCTION: 9 ELEMENTS / 7 GROUPS
WO 2014/061226 A1↗2014Assignee: Nikon Corporation
Inventors: Kumiko Ishida, Issei Tanaka
Example 1NIKON 1 NIKKOR 32mm f/1.2— 9 elements / 7 groups, f = 32.402 mm design
US 2017/0315337 A1↗2017Assignee: Nikon Corporation
Inventors: Satoshi Yamaguchi, Issei Tanaka
Example 1NIKON AF-S NIKKOR 70-200mm f/4 G ED VR— 20 ELEMENTS / 14 GROUPS, 71.39–194.00 mm DESIGN EFL