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公开(公告)号：US20190302432A1
公开(公告)日：2019-10-03
申请号：US16222268
申请日：2018-12-17
Applicant: Tamron Co., Ltd.
Inventor： Yoshito Iwasawa , Hisayuki Yamanaka , Keisuke Okada , Junichi Yamazoe
IPC: G02B15/177 , G02B27/64 , G02B13/18 , G02B13/02
Abstract: A zoom lens including a front group and a rear group, wherein a lens group arranged on an object side of a widest air interval at a wide-angle end is defined as the front group and a lens group arranged on an image side of the widest air interval at the wide-angle end is defined as the rear group, the front group having a negative refractive power, the rear group having a positive refractive power. Changing focal length from the wide-angle end to the telephoto end is performed by changing an air interval between the lens groups.
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公开(公告)号：US11307391B2
公开(公告)日：2022-04-19
申请号：US16687989
申请日：2019-11-19
Applicant: TAMRON CO., LTD.
Inventor： Junichi Yamazoe , Koutarou Joujiki
Abstract: An imaging lens and an imaging device furnished with same, including a first lens group having a positive refractive power, a second lens group having a positive refractive power, and a third lens group having a negative refractive power, disposed in sequence from the object side, wherein zooming from a point at infinity to an object at the near point is performed by moving the second lens group along an optical axis toward the object side while affixing the first lens group and third lens group, and satisfying predetermined conditional expressions.
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Patent Agency Ranking
公开(公告)号：US20200341247A1
公开(公告)日：2020-10-29
申请号：US16687989
申请日：2019-11-19
Applicant: TAMRON CO., LTD.
Inventor： Junichi Yamazoe , Koutarou Joujiki
Abstract: An imaging lens and an imaging device furnished with same, including a first lens group having a positive refractive power, a second lens group having a positive refractive power, and a third lens group having a negative refractive power, disposed in sequence from the object side, wherein zooming from a point at infinity to an object at the near point is performed by moving the second lens group along an optical axis toward the object side while affixing the first lens group and third lens group, and satisfying predetermined conditional expressions.
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公开(公告)号：US20190018221A1
公开(公告)日：2019-01-17
申请号：US15937023
申请日：2018-03-27
Applicant: Tamron Co., Ltd.
Inventor： Junichi Yamazoe
Abstract: A zoom lens including, in order from an object side, a positive first lens group G1, a negative second lens group G2, a composite positive lens group which includes, at the most object side, a positive third lens group G3, which is consisting of one or more lens groups having positive refractive power, and which has positive refractive power as a whole, and a composite negative lens group which includes, at the most object side, a negative A lens group, which additionally includes at least a negative B lens group, and which has negative refractive power as a whole. In the zoom lens, changing focal length is performed by varying the distances between the lens groups, and a predetermined condition is satisfied.
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公开(公告)号：US10935772B2
公开(公告)日：2021-03-02
申请号：US16222268
申请日：2018-12-17
Applicant: Tamron Co., Ltd.
Inventor： Yoshito Iwasawa , Hisayuki Yamanaka , Keisuke Okada , Junichi Yamazoe
IPC: G02B15/17 , G02B15/177 , G02B13/18 , G02B27/64
Abstract: A zoom lens including a front group and a rear group, wherein a lens group arranged on an object side of a widest air interval at a wide-angle end is defined as the front group and a lens group arranged on an image side of the widest air interval at the wide-angle end is defined as the rear group, the front group having a negative refractive power, the rear group having a positive refractive power. Changing focal length from the wide-angle end to the telephoto end is performed by changing an air interval between the lens groups.
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公开(公告)号：US10432870B2
公开(公告)日：2019-10-01
申请号：US15937240
申请日：2018-03-27
Applicant: Tamron Co., Ltd.
Inventor： Junichi Yamazoe
IPC: H04N5/232 , G02B15/20 , G02B13/02 , G03B5/02 , G03B13/00 , G03B5/04 , G02B15/173 , G02B27/64 , G02B13/00
Abstract: The present invention addresses a problem of providing a zoom lens which achieves a longer focal length and has a shorter optical overall length at the telephoto end, and an imaging apparatus provided with the zoom lens. In order to solve the problem, a zoom lens is configured to include, in order from the object side, a positive first lens group G1, a negative second lens group G2, a positive composite positive lens group, and a negative composite negative lens group. The composite positive lens group includes a positive third lens group G3, and is consisting of one or more lens groups having positive refractive power. The composite negative lens group includes a negative A lens group and a negative B lens group having negative refractive power. In the zoom lens, changing focal length is performed by varying distances between the lens groups, and a predetermined condition is satisfied.
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公开(公告)号：US20190020824A1
公开(公告)日：2019-01-17
申请号：US15937240
申请日：2018-03-27
Applicant: Tamron Co., Ltd.
Inventor： Junichi Yamazoe
CPC classification number: H04N5/23296 , G02B13/009 , G02B13/02 , G02B15/173 , G02B15/20 , G02B27/646 , G03B5/02 , G03B5/04 , G03B2205/0015 , G03B2205/0046 , H04N5/23287
Abstract: The present invention addresses a problem of providing a zoom lens which achieves a longer focal length and has a shorter optical overall length at the telephoto end, and an imaging apparatus provided with the zoom lens. In order to solve the problem, a zoom lens is configured to include, in order from the object side, a positive first lens group G1, a negative second lens group G2, a positive composite positive lens group, and a negative composite negative lens group. The composite positive lens group includes a positive third lens group G3, and is consisting of one or more lens groups having positive refractive power. The composite negative lens group includes a negative A lens group and a negative B lens group having negative refractive power. In the zoom lens, changing focal length is performed by varying distances between the lens groups, and a predetermined condition is satisfied.
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