With Mechanical Compensation Patents (Class 359/683)
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Patent number: 11960066Abstract: A zoom lens includes, in order from an object side to an image side, first, second and third lens units having positive, negative and positive refractive powers. The first lens unit moves during zooming. During zooming from a wide-angle end to a telephoto end, a distance between the first and second lens units widens, and a distance between the second and third lens units narrows. The first lens unit consists of three or less lenses. The second lens unit consists of, in order from the object side to the image side, a first single lens as a spherical lens having a negative refractive power, a cemented lens in which a lens having a negative refractive power and a lens having a positive refractive power are cemented, and a second single lens as a spherical lens having a negative refractive power. A predetermined condition is satisfied.Type: GrantFiled: July 6, 2021Date of Patent: April 16, 2024Assignee: CANON KABUSHIKI KAISHAInventor: Shinichiro Saito
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Patent number: 11953664Abstract: A zoom optical system includes a positive first lens group, a negative second lens group disposed on an image side of the first lens group, a positive third lens group disposed on an image side of the second lens group, a negative fourth lens group disposed on an image side of the third lens group, and a final lens group disposed on an image side of the fourth lens group and closest to an image. During zooming, distances between lens groups change, and the first lens group moves along an optical axis. A negative focusing lens group is provided, and the final lens group is disposed on an image side of the focusing lens group. A negative vibration proof group of the second lens group may include, in order from an object, a negative lens, an air gap and a cemented lens of a negative lens and a positive lens. The final lens group may have negative refractive power.Type: GrantFiled: January 29, 2022Date of Patent: April 9, 2024Assignee: Nikon CorporationInventors: Takeshi Umeda, Tomoki Ito, Atsushi Shibayama
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Patent number: 11953752Abstract: The present invention relates to optical imaging systems which are able to provide increased depth of field to microscope devices, motion-picture cameras, and still photographic cameras. Optical systems described herein are able to provide the increased depth of field while maintaining wide field of view and reducing spherical aberration and distortion. Optical systems described herein are also able to be used with standard film and digital sensor formats, and are able to be attached to, or integrated with, photographic and motion-picture cameras, including currently existing cameras.Type: GrantFiled: January 29, 2021Date of Patent: April 9, 2024Inventor: H. Jay Margolis
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Patent number: 11947093Abstract: The variable magnification optical system consists of a positive first lens group, an intermediate group, and a subsequent group in order from an object side to an image side, and does not form an intermediate real image in the entire zooming range. During zooming in a first zooming mode, a distance between the first lens group and the intermediate group changes, all distances between adjacent lens groups in the intermediate group change, a distance between the intermediate group and the subsequent group changes, and all distances between adjacent lens groups in the subsequent group are stationary. During zooming in the second zooming mode, all lens groups in the first lens group and the intermediate group are stationary, and all the distances of the adjacent lens groups in the subsequent group change. The zooming in the first zooming mode and the zooming in the second zooming mode can be independent.Type: GrantFiled: June 18, 2021Date of Patent: April 2, 2024Assignee: FUJIFILM CorporationInventors: Takuya Tanaka, Shinkichi Ikeda
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Patent number: 11933952Abstract: A zoom lens consists of, in order from an object side, a negative first lens group, a positive second lens group, a positive third lens group, a negative fourth lens group, and a positive fifth lens group. The first lens group consists of, in order from the object side, a first A lens group that does not move during focusing, a first B lens group that moves during focusing, and a first C lens group that does not move during focusing. During zooming, the first lens group and the fifth lens group do not move, and the second lens group, the third lens group, and the fourth lens group move. The fourth lens group includes a stop. The zoom lens satisfies a predetermined conditional expression.Type: GrantFiled: July 8, 2021Date of Patent: March 19, 2024Assignee: FUJIFILM CorporationInventor: Masanao Kawana
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Patent number: 11846764Abstract: A zoom lens includes, in order from an object side: a first lens group having positive power; a second lens group having negative power; a third lens group having positive power; a fourth lens group having positive power; a fifth lens group having negative power; and a sixth lens group having positive power. The fourth lens group includes at least one positive lens that satisfies a conditional formula of vdp?65. A conditional formula of 1.19?f3/ft?4.15 and a conditional formula of 0.51?f4/ft?1.50 are satisfied.Type: GrantFiled: April 8, 2022Date of Patent: December 19, 2023Assignee: KONICA MINOLTA, INC.Inventor: Hiroaki Tanaka
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Patent number: 11803042Abstract: A zoom lens consists of, in order from an object side to an image side, a first lens unit having a positive refractive power, a second lens unit having a negative refractive power, a third lens unit having a positive refractive power, and a rear unit that includes a plurality of lens units. All lens units move during zooming, and a distance between adjacent lens units changes. The third lens unit includes, in order from the object side to the image side, a first subunit having a positive refractive power, a second subunit having a positive refractive power, and a third subunit having a positive refractive power. The second subunit includes a negative lens and a positive lens. The second subunit moves in a direction having a component orthogonal to an optical axis during an image stabilization. A predetermined condition is satisfied.Type: GrantFiled: June 29, 2020Date of Patent: October 31, 2023Assignee: CANON KABUSHIKI KAISHAInventor: Yasuaki Hagiwara
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Patent number: 11774712Abstract: The zoom lens includes a positive first lens group, a negative second lens group, a positive third lens group, a negative fourth lens group, a negative fifth lens group, and a positive sixth lens group in order from an object side. All distances between adjacent lens groups change during zooming. The first lens group consists of a negative lens, a positive lens, and a positive lens in order from the object side. Only the fourth lens group moves to an image side during focusing from a long range to a short range. Conditional Expression is related to lateral magnification of the fourth lens group and a lateral magnification of the sixth lens group is satisfied.Type: GrantFiled: June 23, 2021Date of Patent: October 3, 2023Assignee: FUJIFILM CorporationInventor: Taiga Noda
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Patent number: 11768359Abstract: A modular finite conjugate zoom lens assembly with five lens groups each including a doublet, wherein two or three movable lens groups are disposed between a pair of static lens groups.Type: GrantFiled: December 15, 2021Date of Patent: September 26, 2023Assignee: Navitar, Inc.Inventor: Chad Byler
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Patent number: 11754805Abstract: The zoom lens includes a positive first lens group, a negative second lens group, a positive third lens group, a negative fourth lens group, a negative fifth lens group, and a positive sixth lens group in order from an object side. All distances between adjacent lens groups change during zooming. The first lens group consists of a negative lens, a positive lens, and a positive lens in order from the object side. Only the fourth lens group moves to an image side during focusing from a long range to a short range. Conditional Expression is related to lateral magnification of the fourth lens group and a lateral magnification of the sixth lens group is satisfied.Type: GrantFiled: October 2, 2020Date of Patent: September 12, 2023Assignee: FUJIFILM CorporationInventor: Taiga Noda
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Patent number: 11754818Abstract: A zoom lens consists of in order from an object side to an image side: a first lens unit having a positive refractive power and configured not to move for zooming; three or four moving lens units configured to move in zooming; an aperture stop; and one or two rear lens units including a rear lens unit closest to the object side and configured not to move for zooming. An interval between each pair of adjacent lens units is changed in zooming. The three or four moving lens units include a moving lens unit having a negative refractive power. The three or four moving lens units include a rear positive lens unit closest to the image side and having a positive refractive power. The first lens unit includes three positive lenses. Conditional expressions are satisfied by the zoom lens.Type: GrantFiled: October 7, 2020Date of Patent: September 12, 2023Assignee: CANON KABUSHIKI KAISHAInventors: Masao Hori, Kazuya Shimomura
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Patent number: 11747595Abstract: The present disclosure relates to the field of optical lenses and provides a camera optical lens sequentially including, from an object side to an image side, first to seventh lenses. The camera optical lens satisfies following conditions: 2.00?R1/d1?4.00; 20.00?v4?v5?30.00; 1.00?(R1+R2)/(R3+R4)?2.50; and 1.00?R12/R11?2.80, where v4 and v5 denote abbe numbers of the fourth and fifth lenses, respectively; R1 and R2 denote curvature radiuses of an object side surface and an image side surface of the first lens, respectively; R3 and R4 denote curvature radiuses of an object side surface and an image side surface of the second lens, respectively; R11 and R12 denotes curvature radiuses of an object side surface and an image side surface of the sixth lens, respectively; and dl denotes an on-axis thickness of the first lens. The camera optical lens can achieve high optical performance while satisfying design requirements for ultra-thin, wide-angle lenses having large apertures.Type: GrantFiled: September 1, 2020Date of Patent: September 5, 2023Assignee: AAC Optics Solutions Pte. Ltd.Inventors: Kaoru Yamazaki, Lei Zhang, Yuanshan Cui
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Patent number: 11668999Abstract: An optical imaging apparatus includes a plurality of optical lenses. The optical lenses are arranged along an optical axis to capture an image in an image capture direction and project the image on an imaging plane. The plurality of optical lenses are divided into at least one fixed lens set and at least one movable lens set. The fixed lens set is fixedly disposed, and the movable lens set is configured to move relative to the fixed lens set, so as to adjust focal lengths of the optical lenses.Type: GrantFiled: August 13, 2020Date of Patent: June 6, 2023Assignee: GUANGZHOU LUXVISIONS INNOVATION TECHNOLOGY LIMITEDInventors: Hai-Jo Huang, Chiang-Yuan Chuang, Cheng-Te Tseng, Shang-Chieh Chien
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Patent number: 11650401Abstract: A zoom lens consists of, in order from an object side, a positive first lens group, a negative second lens group, a positive third lens group, a positive fourth lens group, and a positive fifth lens group. During zooming, the first lens group and the fifth lens group are not moved, and the second lens group, the third lens group, and the fourth lens group are moved. The second lens group includes a negative lens closest to the object side. In a case where a focal length of the second lens group is denoted by f2 and a focal length of the negative lens of the second lens group closest to the object side is denoted by f21, the zoom lens satisfies 0.6<f2/f21<0.9.Type: GrantFiled: September 18, 2020Date of Patent: May 16, 2023Assignee: FUJIFILM CorporationInventor: Shinkichi Ikeda
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Patent number: 11650396Abstract: The zoom lens includes a positive first lens group, a negative second lens group, a positive third lens group, a negative fourth lens group, a negative fifth lens group, and a positive sixth lens group in order from an object side. All distances between adjacent lens groups change during zooming. The first lens group consists of a negative lens, a positive lens, and a positive lens in order from the object side. Only the fourth lens group moves to an image side during focusing from a long range to a short range. Conditional Expression related to a distance from a lens surface of the first lens group closest to the object side to an image plane and a distance from a lens surface of the second lens group closest to the object side to the image plane is satisfied.Type: GrantFiled: October 2, 2020Date of Patent: May 16, 2023Assignee: FUJIFILM CorporationInventor: Taiga Noda
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Patent number: 11635602Abstract: A zoom lens includes a first lens unit having negative refractive power, a second lens unit having positive refractive power, an intermediate unit including one or more lens units, and a final lens unit having positive refractive power disposed closest to the image side. The first lens unit includes negative lenses G1, G2 and G3 disposed in this order from an object side to an image side. The final lens unit includes at least one negative lens and a positive lens disposed closest to the image side. The zoom lens satisfies predetermined inequalities.Type: GrantFiled: May 20, 2020Date of Patent: April 25, 2023Assignee: CANON KABUSHIKI KAISHAInventor: Shinya Okuoka
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Patent number: 11604339Abstract: A zoom lens consists of, in order from an object side, a positive first lens group, a negative second lens group, a positive third lens group, a positive fourth lens group, and a positive fifth lens group. During zooming, the first lens group and the fifth lens group are not moved, and the second lens group, the third lens group, and the fourth lens group are moved. The first lens group consists of one negative lens and five positive lenses in order from the object side to an image side. Predetermined conditional expressions related to a refractive index, an Abbe number, and a partial dispersion ratio of the negative lens of the first lens group are satisfied.Type: GrantFiled: September 10, 2020Date of Patent: March 14, 2023Assignee: FUJIFILM CorporationInventor: Motoari Ota
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Patent number: 11561364Abstract: An optical imaging lens module is provided, the optical imaging lens module may include a first lens barrel and a second lens barrel, positioned in an order from an image side to an object side along an optical axis; an optical imaging lens, comprising a first lens element group and a second lens element group, disposed in the first lens barrel and the second lens barrel respectively; an actuating unit, disposed on an external side of the second lens barrel to make the second lens barrel to be a movable barrel, which can move along the optical axis relative to the first lens barrel. The optical imaging lens may satisfy EFL/TTL?0.850, in which a system focal length is represented by EFL, and a distance from an object-side surface of the lens element having refracting power and closest to the object side to an imaging plane along the optical axis is represented by TTL.Type: GrantFiled: May 7, 2020Date of Patent: January 24, 2023Assignee: GENIUS ELECTRONIC OPTICAL (XIAMEN) CO., LTD.Inventors: Chun-Hsiang Lin, Wensen Chen
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Patent number: 11520127Abstract: A variable magnification optical system includes, in order from an object: a first lens group (G1) having a negative refractive power; a second lens group (G2); a third lens group (G3); a fourth lens group (G4) having a negative refractive power; and a fifth lens group (G5) having a positive refractive power, the system performing varying magnification by changing the distance between the first and second lens groups, the distance between the second and third lens groups, the distance between the third and fourth lens groups, and the distance between the fourth and fifth lens groups, and the fourth lens group including a 42nd lens group (G42) configured to be movable so as to have a component in a direction orthogonal to an optical axis and a 41st lens group (G41) disposed at an object-side of the 42nd lens group.Type: GrantFiled: May 28, 2020Date of Patent: December 6, 2022Assignee: Nikon CorporationInventor: Atsushi Shibayama
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Patent number: 11487092Abstract: A zoom lens includes, in order from an object side, a first lens group that is positive, a second lens group that is negative, a third lens group that is positive, and a fourth lens group that is positive. During zooming from a wide angle end to a telephoto end, at least the first lens group and the third lens group are fixed and an interval on an optical axis of an adjacent lens group relative thereto is changed. In the zoom lens, the fourth lens group includes at least one positive lens and satisfies a predetermined conditional expression. In addition, an imaging device includes the zoom lens and an image sensor.Type: GrantFiled: August 13, 2020Date of Patent: November 1, 2022Assignee: TAMRON CO., LTD.Inventors: Hirofumi Tabata, Takahiro Mitsuhashi, Toshiya Segawa
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Patent number: 11480775Abstract: A zoom lens includes a negative first lens group, a positive second lens group, and a subsequent lens group in order from an object side. A focusing lens group closer to an image side than the first lens group moves during focusing. The first lens group consists of a first-a lens group and a first-b lens group in order from the object side. Assuming that an average of refractive indices of the negative lenses of the first-a lens group is Nd1ave, a focal length of the focusing lens group is ff, and a focal length of the first lens group is f1, Conditional Expression (1) of 1.73<Nd1ave<1.95 and Conditional Expression (2) of 1<|ff/f1|<3 are satisfied.Type: GrantFiled: December 31, 2020Date of Patent: October 25, 2022Assignee: FUJIFILM CorporationInventor: Daiki Kawamura
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Patent number: 11477386Abstract: Multi-cameras and in particular dual-cameras comprising a Wide camera comprising a Wide lens and a Wide image sensor, the Wide lens having a Wide effective focal length EFLW and a folded Tele camera comprising a Tele lens with a first optical axis, a Tele image sensor and an OPFE, wherein the Tele lens includes, from an object side to an image side, a first lens element group G1, a second lens element group G2 and a third lens element group G3, wherein at least two of the lens element groups are movable relative to the image sensor along the first optical axis to bring the Tele lens to two zoom states, wherein an effective focal length (EFL) of the Tele lens is changed from EFLT,min in one zoom state to EFLT,max in the other zoom state, wherein EFLTmin>1.5×EFLW and wherein EFLTmax>1.5×EFLTmin.Type: GrantFiled: April 10, 2022Date of Patent: October 18, 2022Assignee: Corephotonics Ltd.Inventors: Gal Shabtay, Ephraim Goldenberg, Roy Rudnick, Michael Dror, Gil Bachar, Emil Bronstein, Itay Yedid
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Patent number: 11435564Abstract: Provided is a zoom lens including, in order from an object side: a positive first unit not moving for zooming; one or two moving units move for zooming and including a negative unit; a negative unit moving for zooming; a positive unit including a stop and moving for zooming; and a positive final unit not moving for zooming. The distances on the optical axis, from surface, closest to the object side, of the first unit to a surface, closest to an image side, of the first unit, from the surface, closest to the object side, of the first unit to the stop at the wide angle end, from the surface, closest to the image side, of the first unit to the stop at the wide angle end, and the maximum distance from the surface, closest to the image side, of the first unit to the stop are appropriately set.Type: GrantFiled: August 7, 2020Date of Patent: September 6, 2022Assignee: CANON KABUSHIKI KAISHAInventor: Kazuya Shimomura
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Patent number: 11428911Abstract: A zoom optical system includes, disposed in order from an object, a first lens group having positive refractive power, a second lens group having negative refractive power, and a third lens group having positive refractive power. At least a part of the third lens group is arranged to be movable along an optical axis as a focusing lens group, and the focusing lens group is moved toward an image when a focusing state on a long-distance object is changed to a focusing state on a short-distance object. The following conditional expression is satisfied: 0.90<f3/fw<1.50, where f3 denotes a focal length of the third lens group and fw denotes a focal length of the zoom optical system in a wide-angle end state.Type: GrantFiled: October 10, 2019Date of Patent: August 30, 2022Assignee: Nikon CorporationInventors: Tomoki Ito, Hiroshi Yamamoto
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Patent number: 11428912Abstract: Provided is a zoom lens including, from object side: one/two first positive units including a lens unit arranged at closest to object side not movable for zooming ; one/two second negative units movable toward image side for zooming from wide end to telephoto end; one/two third units including a negative unit arranged closest to object side and movable along a locus convex toward object side for zooming; a fourth positive unit movable for zooming; and a fifth unit, and including an aperture stop in image side of the fourth unit. A distance between object side surface of the first unit and the aperture stop, a length of the first unit, and movement amounts of the second unit from wide end to telephoto end and of the fourth unit from wide end to an intermediate zoom state where the second and third units are closest to each other are set appropriately.Type: GrantFiled: February 14, 2020Date of Patent: August 30, 2022Assignee: CANON KABUSHIKI KAISHAInventor: Yutaka Iriyama
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Patent number: 11415813Abstract: An optical system includes an object side lens unit arranged closest to an object, immobilized in focusing, and having a positive refractive power, an image plane side lens unit arranged closest to an image plane and having a negative refractive power, and a first focus lens unit and a second focus lens unit which are arranged between the object side lens unit and the image plane side lens unit and are moved in focusing. The object side lens unit consists of a first partial unit having the negative refractive power, a second partial unit having the positive refractive power, a third partial unit having the positive or the negative refractive power which are arranged in order from an object side to an image plane side. The second partial unit is moved in a direction including a component in a perpendicular direction to an optical axis in image blur correction.Type: GrantFiled: April 15, 2020Date of Patent: August 16, 2022Assignee: CANON KABUSHIKI KAISHAInventors: Akira Mizuma, Takeo Mori
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Patent number: 11385446Abstract: A first lens group (G1) having positive refractive power, a second lens group (G2) having negative refractive power, a third lens group (G3) having positive refractive power, a fourth lens group (G4) having positive refractive power, a fifth lens group (G5) are arranged in order from an object, and a distance between the first lens group (G1) and the second lens group (G2), a distance between the second lens group (G2) and the third lens group (G3), a distance between the third lens group (G3) and the fourth lens group (G4), and a distance between the fourth lens group (G4) and the fifth lens group (G5) change upon zooming, and a lens group arranged closest to an image is approximately fixed against an image surface (I) upon zooming, and the third lens group (G3) moves along the optical axis upon focusing, and the following expression (1) is satisfied. 0.480<f3/ft<4.Type: GrantFiled: September 6, 2019Date of Patent: July 12, 2022Assignee: Nikon CorporationInventors: Akihiko Obama, Kensuke Uchida
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Patent number: 11378790Abstract: The zoom lens consists of, in order from an object side, a positive first lens group, a negative second lens group, a third lens group, a positive fourth lens group, and a positive fifth lens group. During zooming, the second lens group, the third lens group, and the fourth lens group move. The first lens group consists of, in order from an object side, a negative first a lens group, a positive first b lens group that moves during focusing, and a positive first c lens group. A most-image-side lens of the first b lens group is a negative meniscus lens having a convex surface facing an object side.Type: GrantFiled: March 23, 2020Date of Patent: July 5, 2022Assignee: FUJIFILM CorporationInventors: Takuya Tanaka, Takuya Tanaka, Masanao Kawana, Yasutaka Shimada
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Patent number: 11287620Abstract: A zoom lens system includes a first lens group; a second lens group; and a subsequent lens group arranged in that order from the object side. The second lens group consists of a second lens group-a, a second lens group-b, and a second lens group-c arranged in that order from the object side. A distance between the first lens group and the second lens group increases and a distance between the second lens group and the subsequent lens group decreases during a change in magnification from a short focal length end to a long focal length end. During a change in focus from infinity to a short distance, the second lens group-b is movable to the image side, and a distance between the second lens group-a and the second lens group-b and a distance between the second lens group-b and the second lens group-c are changeable.Type: GrantFiled: March 6, 2020Date of Patent: March 29, 2022Assignee: RICOH COMPANY, LTD.Inventor: Tomoya Koga
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Patent number: 11243385Abstract: A zoom lens includes, in order from an object side to an image side, a first lens unit having a positive refractive power, a second lens unit having a negative refractive power, a third lens unit having a positive refractive power, a fourth lens unit having a negative refractive power, and a rear unit having a plurality of lens units, a distance between adjacent lens units changing during zooming. A predetermined condition is satisfied.Type: GrantFiled: June 9, 2020Date of Patent: February 8, 2022Assignee: CANON KABUSHIKI KAISHAInventors: Masato Katayose, Junya Ichimura
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Patent number: 11221469Abstract: A zooming optical system comprises, in order from an object, a first lens group having positive refractive power, a second lens group having negative refractive power, a third lens group having positive refractive power, a fourth lens group having negative refractive power, and a fifth lens group having positive refractive power. Upon zooming, distances between adjacent lens groups of the first to the fifth lens groups change respectively. The zooming optical system further satisfies the conditional expression 9.6<ft/(?f2)<20.0, where ft denotes a focal length of the zooming optical system in a telephoto end state, and f2 denotes a focal length of the second lens group.Type: GrantFiled: October 17, 2019Date of Patent: January 11, 2022Assignee: Nikon CorporationInventor: Tomoki Ito
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Patent number: 11187870Abstract: Provided is a lens apparatus attachable and detachable to a camera apparatus including: a memory storing information for light amount compensation for image data obtained by pickup of an image formed by the lens apparatus; and a communication device configured to transmit the information to an external apparatus, the information including a coefficient of a polynomial having an n-th order with respect to an image height, “n” being a non-negative integer, the coefficient corresponding to one of a plurality of focal lengths, the plurality of focal lengths including a focal length “f”, which satisfies a conditional expression: 0.9<f/ft/(Fnw/Fnt)<4, where Fnw represents an effective f-number at a wide angle end, Fnt represents an effective f-number at a telephoto end, and “ft” represents a focal length at the telephoto end.Type: GrantFiled: September 6, 2019Date of Patent: November 30, 2021Assignee: CANON KABUSHIKI KAISHAInventors: Koichi Sakuma, Tomoyuki Nakamura
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Patent number: 11150450Abstract: A zoom lens includes: in order from an object side, a first lens group having positive refractive power; a second lens group having negative refractive power; a third lens having positive refractive power; a fourth lens group having negative refractive power; a fifth lens group having positive refractive power; and a sixth lens group having negative refractive power.Type: GrantFiled: November 13, 2019Date of Patent: October 19, 2021Assignee: Konica Minolta, Inc.Inventor: Hiroaki Tanaka
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Patent number: 11150465Abstract: A lens module includes a lens group and at least one coating film. The lens group includes a plurality of lenses arranged successively from an object side of the lens module to an image side of the lens module. Each lens has two effective surfaces. One effective surface is located on the object side of the lens module, and the other is located on the image side. The coating film formed on at least one of the effective surfaces. The coating film satisfies a first relationship: B1<0.5%; B2<0.35%. B1 refers to a maximum value of a reflectivity of incident light incident on the effective surfaces. B2 refers to an average value of the reflectivity of the incident light incident on the effective surfaces, a wavelength of the incident light being in a range of 490 nm to 620 nm.Type: GrantFiled: January 15, 2020Date of Patent: October 19, 2021Assignee: HON HAI PRECISION INDUSTRY CO., LTD.Inventors: Yu-Chiao Huang, Chun-Cheng Ko
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Patent number: 11131837Abstract: Provided is a zoom lens including, in order from an object side to an image side, a first lens unit having a negative refractive power, a second lens unit having a positive refractive power, and a rear lens group including a plurality of lens units. The zoom lens has a configuration in which an interval between each pair of adjacent lens units is changed for zooming. The first lens unit is configured to move for zooming. The rear lens group includes at least one lens unit having a negative refractive power. Further, a focal length of the first lens unit, a focal length of the second lens unit, a focal length of the zoom lens at the wide angle end, a total length of the zoom lens at the wide angle end, and a back focus at the wide angle end are each appropriately set.Type: GrantFiled: April 18, 2019Date of Patent: September 28, 2021Assignee: CANON KABUSHIKI KAISHAInventor: Shohei Kikuchi
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Patent number: 11125986Abstract: The zoom lens consists of, in order from an object side, a positive first lens group, a negative second lens group, a third lens group, a positive fourth lens group, and a positive fifth lens group. During zooming, the second lens group, the third lens group, and the fourth lens group move. The fourth lens group includes a plurality of positive lenses and a negative lens disposed on a most-image-side. Assuming that an average value of Abbe numbers in positive lenses within the fourth lens group is vdp and an Abbe number of a negative lens disposed on a most-image-side of the fourth lens group is vdn, the zoom lens satisfies a conditional expression: 0<vdp?vdn<15.Type: GrantFiled: March 24, 2020Date of Patent: September 21, 2021Assignee: FUJIFILM CorporationInventors: Takuya Tanaka, Takuya Tanaka
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Patent number: 11125984Abstract: A compact zooming optical system, an optical apparatus and a method for manufacturing the zooming optical system having a vibration reduction function, a high zooming ratio, a wide-angle view and superb optical performance are provided, the system including, in order from an object side: a first lens group G1 having positive refractive power; a second lens group G2 having negative refractive power; a third lens group G3 having positive refractive power; and a fourth lens group G4 having negative refractive power; upon zooming from a wide-angle end state to a telephoto end state, a distance between the first lens group G1 and the second lens group G2, a distance between the second lens group G2 and the third lens group G3 and a distance between the third lens group G3 and the fourth lens group G4 being respectively varied; the third lens group G3 having, in order from the object side, a first segment group G31 having positive refractive power and a second segment group G32; the second segment group G32 being mType: GrantFiled: March 2, 2017Date of Patent: September 21, 2021Assignee: Nikon CorporationInventor: Masashi Yamashita
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Patent number: 11112588Abstract: A zoom lens is constituted by, in order from the object side: a positive first lens group; a negative second lens group; a positive third lens group; a positive fourth lens group; a negative fifth lens group, and a positive sixth lens group. The distances among adjacent lens groups change when changing magnification from the wide angle end to the telephoto end. The first lens group is constituted by, in order from the object side, a negative lens, a positive lens, and a positive lens. The third lens group has a positive lens at the most object side thereof. A predetermined conditional formula is satisfied.Type: GrantFiled: October 24, 2019Date of Patent: September 7, 2021Assignee: FUJIFILM CorporationInventor: Taiga Noda
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Patent number: 11096627Abstract: An examination system having separate enabled interchangeable operating modes includes at least one medical device having a housing retaining an optical system. The examination system further includes an adapter that is configured for aligning a plurality of disparate smart devices with the optical system of the medical device when the adapter is attached to the medical device, thereby enabling multiple operating modes without modification to the device. In at least one version, common engagement features are provided on a plurality of medical devices to permit the adapter and an attached smart device to be used therewith interchangeably.Type: GrantFiled: April 24, 2017Date of Patent: August 24, 2021Assignee: Welch Allyn, Inc.Inventors: David G. Perkins, Raymond A. Lia, Robert L. Vivenzio, John R. Strom, Ervin Goldfain, Steven R. Slawson, Michael T. McMahon
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Patent number: 11022782Abstract: An embodiment provides an imaging lens comprising: a body in which a first opening and a second opening are disposed; a first lens group which is disposed on the body and corresponds to the first opening; and a second lens group which is disposed on the body and corresponds to the second opening, wherein the focal distance of the first lens group is greater than 1.8 times and less than 2.1 times the focal distance of the second lens group.Type: GrantFiled: August 24, 2016Date of Patent: June 1, 2021Assignee: LG INNOTEK CO., LTD.Inventors: Sang Hun Lee, Young Woon Kim
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Patent number: 10969564Abstract: Provided is a zoom lens including: a positive first unit; a negative second unit; a positive third unit; a positive fourth unit; a positive fifth unit; and a sixth unit, wherein the first unit is moved toward the object side for zooming from wide angle end to telephoto end, and an interval between each pair of adjacent units is changed for zooming, wherein the fifth unit is moved for focusing, and wherein a focal length at wide angle end, a focal length of the fifth unit, an F-number of the zoom lens at wide angle end, a total length at wide angle end, a distance from a lens surface on the object side of the fifth unit to an image plane at wide angle end at infinity, and a movement amount of the fifth unit for zooming from wide angle end to telephoto end at infinity are appropriately set.Type: GrantFiled: December 13, 2018Date of Patent: April 6, 2021Assignee: CANON KABUSHIKI KAISHAInventor: Takashi Okada
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Patent number: 10962748Abstract: A projection zoom lens assembly for a digital cinema projection system includes three optical groups. A first optical group includes one or more wide angle lenses for projecting digital cinema images. A second optical group includes a set of zoom optical groups each comprising two or more lenses, including a first independently movable zoom group, a second independently movable zoom group, and a third zoom group. A third optical group includes multiple lenses for receiving images for projection.Type: GrantFiled: June 17, 2019Date of Patent: March 30, 2021Assignee: Navitar Industries, LLCInventors: Russell Hudyma, Michael Thomas, Arash Ghorbani
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Patent number: 10895722Abstract: The zoom lens according to the present invention consists of, in order from an object side to an image side, a positive first lens unit, a negative second lens unit, and a positive rear unit including at least four lens units. The second lens unit moves toward the object side during zooming from a wide angle end to a telephoto end, and an interval between each pair of adjacent lens units is changed during zooming. The rear unit includes a positive lens unit LP, which is arranged closest to the image side. Focal lengths of the zoom lens at the wide angle end and at the telephoto end, focal lengths of the first lens unit and the second lens unit, and a distance from the lens surface of the lens unit LP on the image side to an image plane at the telephoto end are each set appropriately.Type: GrantFiled: June 27, 2018Date of Patent: January 19, 2021Assignee: CANON KABUSHIKI KAISHAInventor: Takahiro Hatada
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Patent number: 10895714Abstract: An optical system used in an imaging apparatus includes an optical element. In a case where the optical element is disposed on a magnification side with respect to an intersection point of an optical axis and a chief paraxial ray, the optical element is a negative lens, and in a case where the optical element is disposed on a reduction side with respect to the intersection point, the optical element is a positive lens. The optical element is configured to satisfy all of the following conditional expressions: 30??d?40 1.225?[nd?(14.387/?d)]?1.276 0.4300?[?gF?(2.9795/?d)]?0.5010, where ?d represents an Abbe number of the optical element, ?gF is a partial dispersion ratio of the optical element for g-line and F-line, and nd is a refractive index of the optical element for d-line.Type: GrantFiled: September 18, 2017Date of Patent: January 19, 2021Assignee: CANON KABUSHIKI KAISHAInventors: Shunji Iwamoto, Shinichiro Saito, Satoshi Maetaki, Takahiro Hatada, Suguru Inoue
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Patent number: 10895719Abstract: A projection system including seven lens groups sequentially arranged from an enlargement side, a first lens group having negative refractive power, a second lens group having positive refractive power, a third lens group having positive refractive power, a fourth lens group having negative refractive power, a fifth lens group having positive refractive power, a sixth lens group having positive refractive power, and a seventh lens group having positive refractive power, wherein ?dR that is a dispersion value of a lens that forms the seventh lens group out of the seven lens groups and is closest to a reduction side and ?dF that is a dispersion value of a lens that forms the first lens group out of the seven lens groups and is closest to the enlargement side satisfy a following conditional expression: 5<?dR??dF<30.Type: GrantFiled: November 9, 2017Date of Patent: January 19, 2021Assignee: SEIKO EPSON CORPORATIONInventors: Toshihiko Sakai, Koji Shiokawa
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Patent number: 10859788Abstract: In an imaging apparatus, a control unit controls driving of a lens based on a correction amount calculated from a temperature change acquired by a temperature detection unit and a correction coefficient of the lens.Type: GrantFiled: May 24, 2017Date of Patent: December 8, 2020Assignee: Canon Kabushiki KaishaInventor: Naoki Maruyama
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Patent number: 10831006Abstract: A zoom optical system (ZL) comprises, in order from an object: a first lens group (G1) having positive refractive power; an intermediate group (GM) including at least one lens group and having negative refractive power as a whole; an intermediate side lens group (GRP1) having positive refractive power; a subsequent side lens group (GRP2) having positive refractive power; and a subsequent group (GR) including at least one lens group. The subsequent side lens group (GRP2) moves upon zooming. The subsequent side lens group (GRP2) includes at least two lenses. A following conditional expression is satisfied. 0.2<fRP1/fRP2<0.8 where, fRP1 denotes a focal length of the intermediate side lens group (GRP1), and fRP2 denotes a focal length of the subsequent side lens group (GRP2).Type: GrantFiled: November 28, 2016Date of Patent: November 10, 2020Assignee: Nikon CorporationInventor: Kosuke Machida
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Patent number: 10831005Abstract: A variable magnification optical system includes: a positive first lens group; a negative lens group closer to an image than the first lens group; a positive lens group closer to the image than the negative lens group and including at least one lens closer to the image than an aperture stop; and a focusing group between the negative lens group and the positive lens group. When varying magnification, the first lens group moves with respect to an image plane, and distances between the first lens group and the negative lens group and between the negative lens group and the positive lens group are changed. When focusing, a distance between the focusing group and a lens facing an object-side of the focusing group is changed, and a distance between the focusing group and a lens facing an image-side of the focusing group is changed. Predetermined conditional expressions are satisfied.Type: GrantFiled: December 25, 2015Date of Patent: November 10, 2020Assignee: Nikon CorporationInventors: Kensuke Uchida, Akihiko Obama, Hiroshi Yamamoto, Taku Matsuo
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Patent number: 10830992Abstract: The zoom lens includes a positive first lens group, a negative second lens group, a positive third lens group, a negative fourth lens group, a negative fifth lens group, and a positive sixth lens group in order from an object side. All distances between adjacent lens groups change during zooming. The first lens group consists of a negative lens, a positive lens, and a positive lens in order from the object side. Only the fourth lens group moves to an image side during focusing from a long range to a short range. Conditional Expression is related to lateral magnification of the fourth lens group and a lateral magnification of the sixth lens group is satisfied.Type: GrantFiled: December 14, 2018Date of Patent: November 10, 2020Assignee: FUJIFILM CorporationInventor: Taiga Noda
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Patent number: 10830993Abstract: The zoom lens includes a positive first lens group, a negative second lens group, a positive third lens group, a negative fourth lens group, a negative fifth lens group, and a positive sixth lens group in order from an object side. All distances between adjacent lens groups change during zooming. The first lens group consists of a negative lens, a positive lens, and a positive lens in order from the object side. Only the fourth lens group moves to an image side during focusing from a long range to a short range. Conditional Expression related to a distance from a lens surface of the first lens group closest to the object side to an image plane and a distance from a lens surface of the second lens group closest to the object side to the image plane is satisfied.Type: GrantFiled: December 14, 2018Date of Patent: November 10, 2020Assignee: FUJIFILM CorporationInventor: Taiga Noda