Sei Matsui — Lens Patent Author | Surface & Stop

Sei Matsui5 related patents across 6 interactive lens diagrams.
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Nippon Kogaku K.K. (5)
Nippon Kogaku K.K.(5)US 4,057,330↗1977Assignee: Nippon Kogaku K.K.
Inventors: Sei Matsui
NIKON AI NIKKOR 135mm f/2.8— 5 elements / 4 groups, f/2.8–f/32 · 7 blades
US 4,062,630↗1977Assignee: Nippon Kogaku K.K.
Inventors: Sei Matsui
NIKON AI NIKKOR 135mm f/2— 6 elements / 4 groups, Ai Nikkor 135mm f/2 (1977–2005)
US 4,099,850↗1978Assignee: Nippon Kogaku K.K.
Inventors: Sei Matsui
NIKON AI NIKKOR 28mm f/3.5— 6 elements / 6 groups, f ≈ 28.00 mm
US 4,303,314↗1981Assignee: Nippon Kogaku K.K.
Inventors: Sei Matsui
NIKON SERIES E 100mm f/2.8— 4 elements / 4 groups, f = 100.02 mmNIKON SERIES E 135mm f/2.8— 4 ELEMENTS / 4 GROUPS, f ≈ 135.1 mm
US 4,338,001↗1982Assignee: Nippon Kogaku K.K.
Inventors: Sei Matsui
NIKON AI NIKKOR 180mm f/2.8 ED— 5 elements / 5 groups, f = 180.00 mm, scaled from patent f = 100