公开(公告)号：US20190384035A1

公开(公告)日：2019-12-19

申请号：US16388902

申请日：2019-04-19

Applicant: Takuya NAGANO

Inventor： Takuya NAGANO

IPC: G02B7/10 ,  G02B9/12 ,  G02B27/00

Abstract: An imaging lens system includes a first lens; a stop; a second lens group; and a third lens group, disposed in that order from an object side to an image side. A combination of the first lens group and the second lens group moves together as a single unit to the object side in focusing from infinity to a close distance to increase a distance between the second lens group and the third lens group. Conditional expression (1) below being satisfied: 0.40

公开(公告)号：US20170026537A1

公开(公告)日：2017-01-26

申请号：US15194974

申请日：2016-06-28

Applicant: Takuya NAGANO

Inventor： Takuya NAGANO

IPC: H04N1/193 ,  H04N1/12 ,  H04N1/56 ,  H04N1/40

CPC classification number: H04N1/193 ,  H04N1/121 ,  H04N1/40056 ,  H04N1/401 ,  H04N1/56 ,  H04N2201/0081

Abstract: An scanning lens to scan a document image includes a lens and a retainer to retain the lens bonded and fixed to the retainer by an adhesive. Conditional formula (1), or both conditional formula (2) and conditional formula (3) below are satisfied:  Vb = 0 , ( 1 ) 0 ≤ | α large  /  α small × ( ∑ i n  Vp i - ∑ i n  Vm i )  /  { ∑ i n  Vp i + ∑ i n  Vm i ) |

公开(公告)号：US20140347710A1

公开(公告)日：2014-11-27

申请号：US14283373

申请日：2014-05-21

Applicant: Takuya NAGANO

Inventor： Takuya NAGANO

IPC: G02B13/00 ,  H04N1/193 ,  H04N1/028

CPC classification number: H04N1/1935 ,  G02B13/0045 ,  H04N1/02815 ,  H04N2201/0081 ,  H04N2201/0091 ,  H04N2201/0093

Abstract: An image-reading lens includes front-group and rear-group lens systems which are arranged on an object side and an image side, respectively. The front-group lens system includes equal to or less than 5 lenses which include at least one positive lens and at least one negative lens, and the rear-group lens system includes one negative lens. An angle of view of an entire system of the image-reading lens is equal to or more than 56°. The front-group and rear-group lens systems are structured such that with respect to a change in a distance between the front-group and rear-group lens systems, a change in a focal length of the entire system of the image-reading lens is small, and a change in an image plane is large, and by adjusting the distance between the front-group and rear-group lens systems, a required lens performance is obtained.

Abstract translation: 图像读取透镜包括分别布置在物体侧和像侧的前组和后组透镜系统。 前组透镜系统包括等于或小于5个透镜，其包括至少一个正透镜和至少一个负透镜，并且后组透镜系统包括一个负透镜。 图像读取透镜的整个系统的视角等于或大于56°。 前组和后组透镜系统被构造成使得相对于前组和后组透镜系统之间的距离的变化，图像读取透镜的整个系统的焦距的变化 并且图像平面的变化较大，并且通过调整前组和后组透镜系统之间的距离，可以获得所需的透镜性能。

公开(公告)号：US20140253983A1

公开(公告)日：2014-09-11

申请号：US14203835

申请日：2014-03-11

Applicant: Takuya NAGANO

Inventor： Takuya NAGANO

IPC: G02B13/18 ,  H04N1/028 ,  G02B9/34

CPC classification number: G02B13/18 ,  G02B9/34 ,  G02B13/004 ,  G02B13/02 ,  H04N1/02815

Abstract: An image reading lens which reads an original image includes a front group lens system on an object side, and a back group lens system on an image side, the front group lens system including three lenses having two positive lenses and a negative lens, and the back group lens system including a plastic negative lens.

Abstract translation: 读取原始图像的图像读取透镜包括物体侧的前组透镜系统和像侧的后组透镜系统，前组组透镜系统包括具有两个正透镜和负透镜的三个透镜，并且 背部组透镜系统包括塑料负透镜。

公开(公告)号：US20180267277A1

公开(公告)日：2018-09-20

申请号：US15915100

申请日：2018-03-08

Applicant: Takuya NAGANO

Inventor： Takuya NAGANO

IPC: G02B15/15 ,  G02B9/64 ,  G02B1/00

CPC classification number: G02B15/15 ,  G02B1/00 ,  G02B9/64 ,  G02B13/02

Abstract: An image-forming lens includes a stop, a first lens group and a second lens group. The first lens group includes a first lens, a second lens, a third lens, a fourth lens, and a fifth lens arranged in that order from the object side. The second lens group includes a negative subgroup and a positive subgroup arranged in that order from the object side. The first lens group is movable to the object side to increase a distance between the stop and the first lens group in a change in focusing from an object at infinity to an object close to the image-forming lens. Conditional expression (1) below being satisfied: 0.45

公开(公告)号：US20180056869A1

公开(公告)日：2018-03-01

申请号：US15665895

申请日：2017-08-01

Applicant: Takuya NAGANO

Inventor： Takuya NAGANO

IPC: B60R1/00 ,  G02B9/62 ,  G02B13/00 ,  H04N5/374

CPC classification number: B60R1/00 ,  B60R2300/10 ,  B60R2300/30 ,  G02B9/62 ,  G02B13/0045 ,  H04N5/374

Abstract: An imaging lens includes a first lens group having a negative refractive power, an aperture stop, and a second lens group having a positive refractive power. The first lens group, the aperture stop, and the second lens group are sequentially disposed in a direction from an object side to an image side. The first lens group includes a negative first lens and a negative second lens. The second lens group includes a positive third lens, a positive fourth lens, a negative fifth lens, and a positive sixth lens. Conditional formula (1) below is satisfied: 0.16

公开(公告)号：US20150212319A1

公开(公告)日：2015-07-30

申请号：US14597657

申请日：2015-01-15

Applicant: Takuya NAGANO

Inventor： Takuya NAGANO

IPC: G02B27/00 ,  G02B13/18 ,  G02B9/34 ,  H04N1/028 ,  H04N1/193

CPC classification number: G02B27/0031 ,  G02B9/34 ,  G02B13/18 ,  H04N1/028 ,  H04N1/1935 ,  H04N2201/0081 ,  H04N2201/0091 ,  H04N2201/0093

Abstract: An image reading lens includes a front lens group of five lenses including a positive lens and a negative lens, disposed on an object side and a rear lens group disposed on an image side, including a negative plastic lens. The image reading lens satisfies the following conditions: 0

Abstract translation: 图像读取透镜包括设置在物体侧的包括正透镜和负透镜的五个透镜的前透镜组以及设置在像侧的后透镜组，包括负塑料透镜。 图像读取透镜满足以下条件：0 <＆Sgr; dnN / dt（N） - ＆Sgr; dnp / dt（P）<25 0.10