Tomoya Koga — Lens Patent Author | Surface & Stop

Tomoya Koga3 related patents across 3 interactive lens diagrams.
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Ricoh Co., Ltd. (1)
Ricoh Imaging Company, Ltd. (2)
Ricoh Co., Ltd.(1)JP 2022-117775 A↗2022Assignee: Ricoh Co., Ltd.
Inventors: Tomoya Koga, Yuichiro Ehashi, Takashi Enomoto
Numerical Example 1PENTAX HD D FA 21mm f/2.4 ED Limited DC WR— 11 elements / 8 groups, f = 21.32 mm design
Ricoh Imaging Company, Ltd.(2)JP 2016-6455 A↗2016Assignee: Ricoh Imaging Company, Ltd.
Inventors: Tomoya Koga
Numerical Example 2PENTAX HD DA 18-50mm f/4-5.6 DC WR RE— 11 ELEMENTS / 8 GROUPS, 18-50mm F4-5.6
US 2017/0329112 A1↗2017Assignee: Ricoh Imaging Company, Ltd.
Inventors: Tomoya Koga
Numerical Embodiment 1PENTAX HD DA 55-300mm f/4.5-6.3 ED PLM WR RE— 14 ELEMENTS / 11 GROUPS, DESIGN f = 56.50–291.19 mm