公开(公告)号：US20240280788A1

公开(公告)日：2024-08-22

申请号：US18143607

申请日：2023-05-05

申请人： Genius Electronic Optical (Xiamen) Co., Ltd.

发明人： Qingzhi Zhu ,  Songchao Huang ,  Meiting He ,  Hung-Chien Hsieh

IPC分类号： G02B13/00 ,  G02B9/10 ,  G02B13/14

CPC分类号： G02B13/003 ,  G02B9/10 ,  G02B13/14

摘要： An optical imaging lens includes a first lens element to a second lens element. The first lens element to the second lens element each having an object-side surface facing toward the object side and allowing imaging rays to pass through as well as an image-side surface facing toward the image side and allowing the imaging rays to pass through. A periphery region of the image-side surface of the first lens element is convex, an optical axis region of the image-side surface of the second lens element is concave. Lens elements included by the optical imaging lens are only the two lens elements mentioned above, and the following conditions: HFOV*T1/(ImgH*Fno)≥12.000, T1/T2≥1.300 are satisfied.

公开(公告)号：US12007678B2

公开(公告)日：2024-06-11

申请号：US17560384

申请日：2021-12-23

申请人： SEIKO EPSON CORPORATION

发明人： Yasuyuki Kiyama ,  Hitoshi Hirano ,  Nobutaka Minefuji ,  Koji Shiokawa

IPC分类号： G03B21/28 ,  G02B9/10 ,  G02B13/16

CPC分类号： G03B21/28 ,  G02B9/10 ,  G02B13/16

摘要： A projection system includes a first optical system and a second optical system. The second optical system includes a first lens group disposed on an enlargement side of an intersection position where a chief ray of an off-axis beam having a maximum angle of view intersects with an optical axis of the projection system in the second optical system, a second lens group disposed on the reduction side of the intersection position and having negative power, and a third lens group disposed on the reduction side of the second lens group and having positive power. The second lens group includes a first lens having positive power, a second lens disposed on the reduction side of the first lens and having positive power, and a third lens disposed on the reduction side of the second lens and having negative power. The third lens group includes two lenses each having positive power.

公开(公告)号：US11567294B2

公开(公告)日：2023-01-31

申请号：US17097028

申请日：2020-11-13

申请人： FUJIFILM Corporation

发明人： Akiko Nagahara

IPC分类号： G02B9/04 ,  G02B13/18 ,  G02B3/02 ,  G02B27/00 ,  G02B13/00 ,  G02B5/00 ,  G02B9/60 ,  G02B3/04 ,  G02B9/10

摘要： An imaging lens consists of a front group and a rear group in order from the object side to the image side. The front group includes, as lenses, in order from the object side to the image side, only a positive meniscus lens having a surface convex toward the object side, a first cemented lens having a negative power as a whole, and a second cemented lens having a positive power as a whole. In the first cemented lens, a positive lens and a negative lens are cemented in order from the object side, with a surface convex toward the object side and a surface concave toward the image side. The rear group includes a negative most image side lens having a surface concave toward the object side at a position closest to the image side.

公开(公告)号：US11546493B2

公开(公告)日：2023-01-03

申请号：US16882175

申请日：2020-05-22

申请人： FUJIFILM Corporation

发明人： Shunsuke Miyagishima

IPC分类号： H04N5/225 ,  G02B9/10 ,  G02B9/12

摘要： The finder includes, in order from an object side to an eye point side, a negative objective lens group, and a positive eyepiece lens group. The eyepiece lens group consists of, in order from the object side to the eye point side, a negative first lens, a positive second lens, and a negative third lens. During diopter adjustment, only the second lens moves. The finder satisfies a conditional expression determined in advance.

公开(公告)号：US20220365315A1

公开(公告)日：2022-11-17

申请号：US17876329

申请日：2022-07-28

申请人： OLYMPUS CORPORATION

发明人： Motoko NOMI

IPC分类号： G02B9/10 ,  G02B23/24 ,  A61B1/00

摘要： There is provided an objective optical system, an image pickup apparatus, and an endoscope that are small in size and easy to assemble. The objective optical system includes, in order from the object side to the image side, a negative front lens group, an aperture stop, and a positive rear lens group. The front lens group includes a negative first lens disposed closest to the object, a meniscus second lens having a convex surface facing toward the image side, and a view-direction changing element. The objective optical system satisfies the following conditional expressions (1) to (4):
9

公开(公告)号：US20220342198A1

公开(公告)日：2022-10-27

申请号：US17811819

申请日：2022-07-11

申请人： FUJIFILM Corporation

发明人： Tomoyuki BABA

IPC分类号： G02B23/24 ,  G02B9/10 ,  G02B13/18 ,  G02B13/06

摘要： An objective optical system for an endoscope consisting of, in order from an object side toward an image side: a front group having negative focal power; an aperture stop; and a rear group having positive focal power, wherein: the front group includes only three lenses, which consist of, in order from the object side toward the image side: a first lens having negative focal power; a second lens having negative focal power; and a third lens having positive focal power, the rear group includes only three lenses, which consist of, in order from the object side toward the image side: a fourth lens having positive focal power; a fifth lens having positive focal power; and a sixth lens having negative focal power, the second lens and the third lens are cemented to each other, and the fifth lens and the sixth lens are cemented to each other.

公开(公告)号：US20220260813A1

公开(公告)日：2022-08-18

申请号：US17739974

申请日：2022-05-09

申请人： CANON KABUSHIKI KAISHA

发明人： Hiroki Ebe ,  Shinichiro Saito

IPC分类号： G02B13/16 ,  G02B9/10

摘要： A converter lens according to an exemplary embodiment of the present invention is a converter lens that has a negative refractive power and increases a focal length of an entire system. The converter lens includes a front group having a positive refractive power and a rear group having a negative refractive power, and the front group is a lens unit having a combined refractive power having a maximum positive refractive power in a case where the combined refractive power is obtained by combining a refractive power of each lens in order from the lens closest to an object toward an image side. At this time, a focal length of the front group, a focal length of the converter lens, and a lateral magnification of the converter lens when the converter lens is disposed on an image side of a master lens are determined as appropriate.

公开(公告)号：US20220137332A1

公开(公告)日：2022-05-05

申请号：US17491574

申请日：2021-10-01

申请人： Sintai Optical (Shenzhen) Co., Ltd. ,  Asia Optical Co., Inc.

发明人： Jian-Wei LEE ,  Shu-Hung LIN

IPC分类号： G02B9/10 ,  G02B13/18 ,  G02B9/64

摘要： A lens assembly includes a first, second, third, stop, fourth, fifth, sixth, and seventh in order from an object side to an image side along an optical axis. The first lens is a meniscus lens with refractive power and includes a convex surface facing the object side and a concave surface facing the image side. The second lens is with negative refractive power. The third lens is with positive refractive power and includes a convex surface facing the image side. The fourth lens is with refractive power and includes a convex surface facing the image side. The fifth lens is with positive refractive power and includes a convex surface facing the object side. The sixth lens is a biconcave lens with negative refractive power. The seventh lens is with refractive power and includes a convex surface facing the image side. The lens assembly satisfies: 4.3≤TTL/BFL≤5.3.

公开(公告)号：US20220026716A1

公开(公告)日：2022-01-27

申请号：US17378812

申请日：2021-07-19

申请人： Yoshifumi SUDOH ,  Naoki NAKAMURA ,  Masahiro ITOH ,  Susumu MOMMA ,  Shun OKAZAKI ,  Shigenobu HIRANO ,  Yasuo KATANO ,  Kenji KAMEYAMA ,  Norikazu IGARASHI ,  Aino HASEGAWA ,  Takashi MAKI ,  Masamichi YAMADA ,  Takemasa TSUTSUI

发明人： Yoshifumi SUDOH ,  Naoki NAKAMURA ,  Masahiro ITOH ,  Susumu MOMMA ,  Shun OKAZAKI ,  Shigenobu HIRANO ,  Yasuo KATANO ,  Kenji KAMEYAMA ,  Norikazu IGARASHI ,  Aino HASEGAWA ,  Takashi MAKI ,  Masamichi YAMADA ,  Takemasa TSUTSUI

IPC分类号： G02B27/01 ,  F21V8/00 ,  G02B3/06 ,  G02B9/14 ,  G02B9/10

摘要： A propagation optical system includes: a first optical system; an intermediate optical element; and a second optical system. The first optical system, the intermediate optical element, and the second optical system being sequentially arranged in a direction from the image display element toward the light guide member along an optical axis. The intermediate optical element has a non-rotationally symmetric curved surface, of which shape is non-rotationally symmetric about the optical axis. A cross-sectional shape, of the non-rotationally symmetric curved surface, in a first plane including the optical axis is non-arc shape. The first plane is a plane in which the non-rotationally symmetric surface has a strongest positive power among planes including the optical axis. The propagation optical system is configured to form, between the first optical system and the second optical system, an intermediate image corresponding to an image displayed on the image display element.

公开(公告)号：US20210356731A1

公开(公告)日：2021-11-18

申请号：US17388057

申请日：2021-07-29

申请人： CANON KABUSHIKI KAISHA

发明人： Shuichi Mogi

IPC分类号： G02B25/00 ,  G02B3/08 ,  G02B9/10 ,  G02B9/16 ,  G02B9/34 ,  G02B9/60

摘要： An observation optical system is configured to observe an image displayed on an image display plane and includes a negative lens and a positive lens. At least one of the negative lens and the positive lens has a lens surface having a Fresnel shape. A predetermined condition is satisfied.