Imaging lens, camera, and portable information terminal apparatus
Номер патента: EP3935428A1
Опубликовано: 12-01-2022
Автор(ы): Kazuyasu Ohashi
Принадлежит: Ricoh Co Ltd
Опубликовано: 12-01-2022
Автор(ы): Kazuyasu Ohashi
Принадлежит: Ricoh Co Ltd
Реферат: An imaging lens includes sequentially a first lens group, a second lens group having a positive refractive power, an aperture stop, a third lens group having a positive refractive power, and a fourth lens group. The first lens group includes, sequentially from the object side to the image side, a positive lens having a convex surface facing the object side, and a negative lens having a concave surface facing the image side. The second lens group includes a negative lens disposed closest to the object side and having a concave surface facing the object side, and a positive lens disposed closer than the negative lens to the image side and having a convex surface facing the object side. The third lens group includes a positive lens having a convex surface facing the image side, and a negative lens. The fourth lens group includes a negative lens having a concave surface.
Imaging lens, camera, and portable information terminal apparatus
Номер патента: WO2020179424A1. Автор: Kazuyasu Ohashi. Владелец: RICOH COMPANY, LTD.. Дата публикации: 2020-09-10.