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公开(公告)号：US20220171160A1
公开(公告)日：2022-06-02
申请号：US17479480
申请日：2021-09-20
Applicant: TAMRON CO., LTD.
Inventor： Toshiya SEGAWA , Yuki MORI , Hirofumi TABATA
Abstract: There is provided: an optical system including a focus lens group having positive refractive power and configured to move along an optical axis when focusing from an infinite-distance object to a short-distance object, and satisfying predetermined conditional expressions; and an imaging device including the optical system. The focus lens group includes a lens subgroup A, an aperture stop, and a lens subgroup B in order from the object side. The lens subgroup A includes a negative lens, a positive lens, and a positive lens in order from the image side. The lens subgroup B includes a negative lens and a positive lens in order from the object side.
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公开(公告)号：US11194129B2
公开(公告)日：2021-12-07
申请号：US16665374
申请日：2019-10-28
Applicant: TAMRON CO., LTD.
Inventor： Shingo Fuse
Abstract: A correction lens is used in an optical system in which a light-transmissive cover member having radii of curvature different from each other in a predetermined first direction and a second direction perpendicular to the first direction is disposed on an object side. Radii of curvature of an image-side surface of the correction lens are different in the first direction and the second direction, and satisfy a predetermined condition.
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公开(公告)号：US10921571B2
公开(公告)日：2021-02-16
申请号：US16092108
申请日：2016-06-30
Applicant: Tamron Co., Ltd.
Inventor： Yoshito Iwasawa
Abstract: A small observation optical system having a high resolution, an observation imaging device that includes the observation optical system, an observation imaging system, an image forming lens system, and a method of adjusting the observation optical system. The observation optical system includes an objective lens system G1 and an image forming lens system G2, sequentially from the observation object side, and the image forming lens system G2 forms an observation object image forms through the objective lens system G1, on an image plane IP of an image sensor, and satisfies predetermined condition.
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公开(公告)号：US10606044B2
公开(公告)日：2020-03-31
申请号：US15962509
申请日：2018-04-25
Applicant: Tamron Co., Ltd.
Inventor： Keisuke Okada
Abstract: An object of the present invention is to provide a zoom lens that can perform favorable correction of chromatic aberration in the entire zoom range, and can have higher performance and a smaller size than conventional ones; and an imaging apparatus including the zoom lens. To achieve the object, provided are a zoom lens and an imaging apparatus including the zoom lens. The zoom lens includes, in order from an object side: a positive first lens group G1; a negative second lens group G2; and a GR group including one or more lens groups. In the zoom lens, changing focal length is performed by varying intervals between the lens groups. The GR group includes convex lenses GpH and GpL satisfying predetermined conditional expressions. The convex lens GpH is the positive lens which is arranged second position or after from the object side in positive lenses in the GR group.
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公开(公告)号：US10171722B2
公开(公告)日：2019-01-01
申请号：US15124531
申请日：2015-03-10
Applicant: Tamron Co., Ltd.
Inventor： Yuichi Ueyama
Abstract: A lens unit and a rear-side focus adjustment system for infrared cameras capable of performing rear-side focus adjustments even when the position of the detection surface of an infrared sensor is unknown in an infrared camera. The lens unit is detachably mounted on a camera body that detects infrared light with an infrared sensor and converts the infrared light to an image signal, the lens unit including a focus adjustment lens and controller. The controller calculates a rear-side focus adjustment amount for causing a rear-side focus position to correspond to the detection surface based on an error between an actually measured focused position of the focus adjustment lens relative to an object at a particular object distance and a theoretically focused position of the focus adjustment lens calculated based on the object distance and controls the position of the focus adjustment lens based on the rear-side focus adjustment amount.
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Patent Agency Ranking
公开(公告)号：US09880374B2
公开(公告)日：2018-01-30
申请号：US15235699
申请日：2016-08-12
Applicant: TAMRON CO., LTD.
Inventor： Yasuhiko Obikane
CPC classification number: G02B13/009 , G02B15/16 , G02B15/163 , G02B15/20 , G02B27/0025 , G02B27/646
Abstract: The present invention provides a zoom lens that is compact in general and has an F-number to implement brightness even in the telephoto end side, and an imaging apparatus equipped with the zoom lens. The zoom lens includes, in order from an object side: a first lens group having positive refractive power; a second lens group having positive refractive power; a third lens group having negative refractive power; and a fourth lens group having positive refractive power. At the time of zooming from the wide-angle end state to the telephoto end state, the third lens group moves so that the distance between the second lens group and the third lens group increases, and the distance between the third lens group and the fourth lens group decreases.
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公开(公告)号：US20170336601A1
公开(公告)日：2017-11-23
申请号：US15587557
申请日：2017-05-05
Applicant: Tamron Co., Ltd.
Inventor： Lai WEI , Toshiya SEGAWA
CPC classification number: G02B13/009 , G02B15/16 , G02B15/173 , G02B27/646
Abstract: A variable magnification optical system according to the present invention includes a C lens group having positive refractive power, a B lens group having negative refractive power, and an A lens group having positive refractive power in order from an image side and includes an N lens group having negative refractive power on an object side in relation to the A lens group, wherein when zooming from a wide angle end to a telephoto end, at least the A lens group, the B lens group, and the N lens group are moved relative to an image plane and a predetermined conditional expression is satisfied.
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公开(公告)号：US09720208B2
公开(公告)日：2017-08-01
申请号：US15083670
申请日：2016-03-29
Applicant: TAMRON CO., LTD.
Inventor： Keisuke Omori
CPC classification number: G02B9/12 , G02B13/0015 , G02B27/0025
Abstract: An inner focusing lens has sequentially from the object side, a first lens group having a positive refractive power, a second lens group having a negative refractive power, and a third lens group having a negative refractive power. The first lens group has negative meniscus lenses disposed farthest on the object side thereof. The second lens group is moved along the optical axis whereby focusing from a focus state for an object at infinity to a focus state for the minimum object distance is performed. The inner focusing lens satisfies predetermined conditions and thereby, realizes a compact inner focusing lens having high imaging performance at wide angles, suitable for compact cameras having a function of capturing video.
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公开(公告)号：US09715125B2
公开(公告)日：2017-07-25
申请号：US14284784
申请日：2014-05-22
Applicant: Tamron Co., Ltd.
Inventor： Yasuhiko Obikane
IPC: G02B27/64 , G02B15/14 , G02B15/22 , G02B15/173
CPC classification number: G02B27/646 , G02B15/14 , G02B15/173 , G02B15/22 , G02B27/64
Abstract: A zoom lens includes a first lens group having positive refracting power, a second lens group having negative refracting power, a third lens group having positive refracting power, a fourth lens group having negative refracting power and a fifth lens group having negative refracting power in order from an object side, in which the lens groups move in magnification change from a wide angle end to a telephoto end such that a gap between the first lens group and the second lens group increases and a gap between the second lens group and the third lens group decreases, a negative lens group disposed closer to an image focusing side than a diaphragm among all lens groups is set as a focusing lens group, and the focusing lens group moves toward the image focusing side at focusing from infinity to a close object, the zoom lens satisfies a conditional expression.
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公开(公告)号：US09709704B2
公开(公告)日：2017-07-18
申请号：US13647510
申请日：2012-10-09
Applicant: Tamron Co., Ltd.
Inventor： Masaaki Miyahara , Minoru Shibuya , Terufusa Kunisada
Abstract: An object of the present invention is to provide an anti-reflection film excellent in high-temperature and high-humidity environment resistance and scratch resistance in addition to improved anti-reflection performance of a concave-convex nanostructure. To achieve the object, an anti-reflection film 10 comprises: a base layer 11 as a first optical thin film that is provided on an optical surface 21a of an optical element 21; a concave-convex nanostructure layer that is provided on a surface of the base layer 11 and is composed of a concave-convex nanostructure 12 formed so as to have a pitch width p between the convex parts 12b of shorter than an incident light wavelength; and a cover layer 13 as a second optical thin film that covers peaks of the convex part 12b with a void 14 being provided between the cover layer 13 and concave part 12a constituting the concave-convex nanostructure 12.
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