Hideki Ogawa — Lens Patent Author | Surface & Stop

Hideki Ogawa7 related patents across 10 interactive lens diagrams.
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Canon Inc. (7)
Canon Inc.(7)JP H01-102413 A↗1989Assignee: Canon Inc.
Inventors: Hideki Ogawa, Sadatoshi Takahashi
Numerical Example 1CANON EF 200mm f/1.8 L USM— 10 POWERED ELEMENTS / 8 GROUPS (PATENT CORE), f ≈ 200.017 mm
JP 1991-141313 A↗1991Assignee: Canon Inc.
Inventors: Hideki Ogawa
Numerical Example 1CANON EF 100mm f/2.8 Macro— 10 ELEMENTS / 9 GROUPS, 100mm f/2.8 (marketed)
JP H05-034592 A↗1993Assignee: Canon Inc.
Inventors: Hideki Ogawa
Numerical Example 2CANON EF 14mm f/2.8 L USM— 14 ELEMENTS / 10 GROUPS, f = 14.201 mm
JP 1997-211319 A↗1997Assignee: Canon Inc.
Inventors: Hideki Ogawa
Numerical Example 1CANON EF 180mm f/3.5 L Macro USM— 14 ELEMENTS / 12 GROUPS, 180mm f/3.5 MARKETED
US 5,899,585↗1999Assignee: Canon Inc.
Inventors: Hideki Ogawa
Numerical Example 1CANON EF 28-80mm f/3.5-5.6 II— 10 ELEMENTS / 10 GROUPS, COMPUTED EFL 28.9689-76.9612 mm
US 6,115,188 A↗2000Assignee: Canon Inc.
Inventors: Akihiro Nishio, Hideki Ogawa, Makoto Misaka
Numerical Example 1CANON EF 300mm f/2.8 L IS USM— 15 ACTIVE ELEMENTS / 11 GROUPS, MODELED EFL ≈ 293.600 mmNumerical Example 22CANON EF 600mm f/4 L IS USM— 15 powered elements / 11 groups + filter, Patent f = 585.20 mm; computed EFL ≈ 585.328 mmNumerical Example 24CANON EF 500mm f/4 L IS USM— 15 POWERED ELEMENTS / 11 GROUPS + FILTER, PATENT f = 490.56 mm; ARRAY EFL ≈ 491.36 mmNumerical Example 25CANON EF 400mm f/2.8 L IS USM— 400mm f/2.8 (marketed), Patent f = 392.15 mm, F/2.9
US 2002/0015231 A1↗2002Assignee: Canon Inc.
Inventors: Hideki Ogawa
Numerical Example 1CANON EF 400mm f/4 DO IS USM— US 2002/0015231 A1 — Example 1, 15 powered elements / 11 active groups + rear plate