公开(公告)号：US12013517B2

公开(公告)日：2024-06-18

申请号：US17357135

申请日：2021-06-24

Applicant: Samsung Electro-Mechanics Co., Ltd.

Inventor： Hag Chul Kim

IPC: G02B13/00 ,  A61B18/04 ,  A61B18/14 ,  G02B15/14 ,  G02B15/167 ,  G02B15/177 ,  G02B27/64 ,  A61B18/00

CPC classification number: G02B13/0065 ,  A61B18/042 ,  A61B18/1402 ,  G02B13/002 ,  G02B13/006 ,  G02B15/144 ,  G02B27/646 ,  A61B2018/00744 ,  G02B15/167

Abstract: There is provided an optical imaging system including a prism, a first fixed lens group, a first movable lens group, a second movable lens group, and a second fixed lens group. The prism is configured to refract light reflected from an object side toward an imaging plane and a reflecting member. The prism is disposed on the first fixed lens group and the first movable lens group is configured to change a position of the imaging plane so that an overall focal length is changed. The second movable lens group is configured to adjust a position of the imaging plane so that a focal length for an object is adjusted. The imaging plane is disposed on the second fixed lens group.

公开(公告)号：US11860346B2

公开(公告)日：2024-01-02

申请号：US17355212

申请日：2021-06-23

Applicant: FUJIFILM Corporation

Inventor： Kenji Ito ,  Toshio Sasaki ,  Masayasu Konishi ,  Michio Cho

IPC: G02B15/167 ,  G02B3/02 ,  G02B13/18 ,  G02B15/15 ,  G02B27/00

CPC classification number: G02B15/167 ,  G02B3/02 ,  G02B13/18 ,  G02B15/15 ,  G02B27/0025

Abstract: A lens 1 has unevenness within an optical effective diameter D of an optical surface 2, an arithmetic mean roughness Ra within the optical effective diameter D of the optical surface 2 is 20 nm or more and 50 nm or less, and an average value of widths W of protrusion portions 3 of the unevenness on an average line C2 of a roughness curve C1 of the optical surface 2 is 1/200 or more and 1/50 or less of the optical effective diameter D of the optical surface 2. The lens 1 is suitably used as a lens that composes a zoom lens or an imaging lens.

公开(公告)号：US11846754B2

公开(公告)日：2023-12-19

申请号：US17127332

申请日：2020-12-18

Applicant: Konica Minolta, Inc.

Inventor： Yoshihiro Nakano ,  Koji Takahara

IPC: C01F5/28 ,  C01G23/00 ,  C01G23/047 ,  C01G25/00 ,  C01G33/00 ,  C01G35/00 ,  C03C17/34 ,  G02B15/167 ,  G02B1/115

CPC classification number: G02B1/115 ,  C01F5/28 ,  C01G23/003 ,  C01G23/047 ,  C01G25/006 ,  C01G33/00 ,  C01G35/00 ,  C03C17/3452 ,  G02B15/167 ,  C03C2217/213 ,  C03C2217/218 ,  C03C2217/285 ,  C03C2217/734 ,  C03C2218/152

Abstract: An optical lens with an antireflective film includes: a lens substrate; and an antireflective film disposed on the lens substrate. The antireflective film is formed of layers each having a physical thickness of 140 nm or less. In order from an air side, the antireflective film has: a first layer formed as an MgF2 layer, a second layer, a fourth layer, a sixth layer, an eighth layer, and a tenth layer each having a refractive index of 2.0 or more and 2.3 or less, and a third layer, a fifth layer, a seventh layer, and a ninth layer each formed as an SiO2 layer.

公开(公告)号：US20230266573A1

公开(公告)日：2023-08-24

申请号：US18163795

申请日：2023-02-02

Applicant: FUJIFILM Corporation

Inventor： Masaru AMANO

IPC: G02B15/14 ,  G02B15/167

CPC classification number: G02B15/145 ,  G02B15/167

Abstract: The zoom lens consists of a first unit, a second unit, a third unit, a fourth unit, and a fifth unit in order from the magnification side, and forms an intermediate image. The first unit consists of one lens group which has a positive refractive power. The second unit consists of two lens groups which move during magnification change and has a negative refractive power as a whole at the wide angle end. The third unit includes one or more lens groups which move during magnification change. The fourth unit includes one or more lens groups which move during magnification change.

公开(公告)号：US20180149844A1

公开(公告)日：2018-05-31

申请号：US15882486

申请日：2018-01-29

Applicant: RICOH IMAGING COMPANY, LTD.

Inventor： Tatsuyuki ONOZAKI

IPC: G02B15/177 ,  G02B27/64 ,  G02B15/14 ,  G02B15/16 ,  G02B15/167 ,  G02B15/163

CPC classification number: G02B15/177 ,  G02B15/14 ,  G02B15/16 ,  G02B15/163 ,  G02B15/167 ,  G02B27/646

Abstract: A zoom lens system includes a negative first lens group, a positive second lens group, a negative third lens group and a positive fourth lens group, in that order from the object side. Upon zooming from a short focal length extremity to a long focal length extremity, at least the first lens group, the second lens group and the fourth lens group are moved in the optical axis direction of the zoom lens. The third lens group includes a negative first sub-lens group and a negative second sub-lens group, in that order from the object side, the second sub-lens group is provided with a negative single lens element and a positive single lens element, and an air lens is formed between the negative single lens element and the positive single lens element.

公开(公告)号：US20180045928A1

公开(公告)日：2018-02-15

申请号：US15647849

申请日：2017-07-12

Applicant: CANON KABUSHIKI KAISHA

Inventor： Shoichi Takemoto

IPC: G02B15/167 ,  G02B15/28

CPC classification number: G02B15/167 ,  G02B15/173 ,  G02B15/28

Abstract: A zoom lens includes, in order from object-side, a fixed positive first group including three-or-more lenses, a negative second group including a unit moving toward image-side during zooming toward telephoto-end, a positive third group including a unit moving toward object-side during zooming from wide-end to telephoto-end, a negative fourth group moving during zooming and focusing, and a rear group. Focal lengths of the first group and the zoom lens at wide-end, a movement amount of a unit moving by largest amount during zooming toward telephoto-end in the second group, a largest value of position change between wide-end and telephoto-end of units moving toward an object side during zooming from wide-end to telephoto-end, refractive index for d-line of a positive lens closest to image-side in the first group, and average refractive index for d-line of positive lenses of the first group other than the positive lens are appropriately set.

公开(公告)号：US20180031811A1

公开(公告)日：2018-02-01

申请号：US15550440

申请日：2016-02-25

Applicant: Nikon Corporation

Inventor： Satoshi MIWA ,  Masashi YAMASHITA

IPC: G02B15/167 ,  G02B7/04 ,  G02B27/64 ,  G02B13/02 ,  G02B27/00

CPC classification number: G02B15/167 ,  G02B7/04 ,  G02B13/02 ,  G02B15/22 ,  G02B15/28 ,  G02B27/0037 ,  G02B27/646

Abstract: An optical system includes: a first lens group having a positive refractive power, a second lens group having a negative refractive power, and a third lens group, disposed in this order along an optical axis starting from an object side, wherein: the second lens group is movable along the optical axis to perform focusing from an infinity-distance object to a short-distance object; and the third lens group comprises: a vibration-proofing lens group configured to be movable in a direction having a component perpendicular to the optical axis to perform image surface correction on image blurring; and an adjustment lens group that is disposed closer to an image side than the vibration-proofing lens group is, the adjustment lens group including a negative lens Ln and a lens group having a positive refractive power, disposed next to the negative lens Ln, and the adjustment lens group being capable of adjusting an air gap between the negative lens Ln and the lens group having a positive refractive power.

公开(公告)号：US20180024314A1

公开(公告)日：2018-01-25

申请号：US15646492

申请日：2017-07-11

Applicant: CANON KABUSHIKI KAISHA

Inventor： Yoshihisa Tashiro

IPC: G02B9/60 ,  G02B13/06 ,  G02B7/04 ,  G02B17/00 ,  G02B7/02 ,  G02B13/02 ,  G03B5/00

CPC classification number: G02B9/60 ,  G02B7/021 ,  G02B7/04 ,  G02B13/02 ,  G02B13/06 ,  G02B15/167 ,  G02B15/173 ,  G02B17/00 ,  G03B5/00 ,  G03B2205/0046

Abstract: A zoom lens includes, in order from an object side to an image side, first to fifth lens units respectively having positive, negative, positive, positive, and negative refractive powers. The first lens unit does not move for zooming, and each of the distances between the lens units adjacent to each other is changed during zooming. Lateral magnifications β2w and β2t of the second lens unit at a wide angle end and a telephoto end, respectively, lateral magnifications β3w and β3t of the third lens unit at the wide angle end and the telephoto end, respectively, lateral magnifications β4w and β4t of the fourth lens unit at the wide angle end and the telephoto end, respectively, a focal length f5 of the fifth lens unit, and an amount of movement M5 of the fifth lens unit in zooming from the wide angle end to the telephoto end are appropriately set.

公开(公告)号：US20180003944A1

公开(公告)日：2018-01-04

申请号：US15513327

申请日：2016-08-29

Applicant: HOYA CORPORATION

Inventor： Hiroaki FUJII

IPC: G02B23/24 ,  A61B1/00 ,  G02B15/15 ,  G02B15/167

CPC classification number: G02B23/2438 ,  A61B1/00 ,  A61B1/00188 ,  G02B13/02 ,  G02B13/18 ,  G02B15/14 ,  G02B15/15 ,  G02B15/167 ,  G02B23/24 ,  G02B23/2415 ,  G02B23/243

Abstract: An endoscope magnification optical system includes, in order starting from an object side, a first lens group having positive power, a second lens group having positive power, and a third lens group including at least a meniscus lens with a concave surface facing the object side and a positive lens, and the endoscope magnification optical system is configured to magnify an optical image by moving at least the second lens group in an optical axis direction with respect to the first lens group, which is a fixed lens group, while a distance from a lens surface located the closest to the object of the first lens group to an image plane is kept constant.

公开(公告)号：US09645362B2

公开(公告)日：2017-05-09

申请号：US15014668

申请日：2016-02-03

Applicant: SEIKO EPSON CORPORATION

Inventor： Nobutaka Minefuji

IPC: G02B15/14 ,  G02B9/64 ,  G02B13/18 ,  G02B13/00 ,  G02B17/08 ,  G02B15/167 ,  G02B27/09 ,  G02B15/00 ,  G02B3/04 ,  G02B5/00 ,  G02B7/04 ,  G02B27/00 ,  G03B21/28

CPC classification number: G02B13/0045 ,  G02B3/04 ,  G02B5/005 ,  G02B7/04 ,  G02B9/64 ,  G02B13/002 ,  G02B13/0065 ,  G02B13/007 ,  G02B13/009 ,  G02B15/00 ,  G02B15/167 ,  G02B17/08 ,  G02B27/0025 ,  G02B27/0977 ,  G03B21/28

Abstract: A 1-2nd lens group includes two aspherical resin lenses, and thereby it is possible to perform effective correction in order to suppress aberration fluctuation to be reduced. At this time, a glass lens is disposed between the two lenses, and thereby it is possible to control an incident light angle to the resin lens and to reduce power of the resin lenses, and it is possible to prevent variations of shapes of the resin lens. Even in a case where the second optical group is configured of one mirror, it is possible for a primary image to have appropriate aberration and to hereby reduce aberration for a good image which is finally projected onto a screen through the second optical group.