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1. 发明授权

US10473881B2 Lens unit 有权
公开(公告)号：US10473881B2
公开(公告)日：2019-11-12
申请号：US16304694
申请日：2018-02-14
申请人： NIDEC SANKYO CORPORATION
发明人： Yosuke Kanzaki
IPC分类号： G02B7/02 , G02B13/18
摘要： A lens unit is provided capable of reducing the shift of the focal position when the temperature rises. The lens unit includes a plurality of lenses and a cylindrical holder configured to internally hold the plurality of lenses. The holder has a smaller coefficient of thermal expansion, compared to single lenses (i.e., the second lens and the third lens) that are meniscus-shaped plastic lenses. The side surfaces of the second lens and the third lens are press-fitted such that the concave side portions corresponding to the positions of the concave lens surfaces abut the inner surface of the holder, the second lens and the third lens including the concave lens surfaces and the convex lens surfaces. Therefore, when the ambient temperature rises, the refractive index of the plastic lens decreases but the convex lens surface deforms such that the curvature radius becomes smaller.

2. 发明授权

US11789240B2 Wide-angle lens including seven lenses of −−+++−+ refractive powers 有权
$Wide-angle lens including seven lenses of −−+++−+ refractive powers$
公开(公告)号：US11789240B2
公开(公告)日：2023-10-17
申请号：US17117042
申请日：2020-12-09
申请人： NIDEC SANKYO CORPORATION
发明人： Tadashi Komiyama , Yosuke Kanzaki
IPC分类号： G02B13/00 , G02B27/00 , G02B13/06 , G02B9/64
CPC分类号： G02B13/0045 , G02B9/64 , G02B13/06 , G02B27/0025
摘要： A wide-angle lens is provided. The wide-angle lens includes, sequentially arranged from an object side, a first lens, a second lens, a third lens, a fourth lens, a diaphragm, a fifth lens, a sixth lens, a seventh lens and an imaging element. The first lens is a negative lens with a convex spherical surface facing the object side and a concave surface facing an image side. The second lens is a negative lens with a concave surface facing the image side. A combined effective focal length of the first lens and the second lens is set to f12 and a maximum image height is set to HOI, −1.000

3. 发明授权

US11561380B2 Wide-angle lens capable of suppressing multiple reflection between the second lens and the third lens 有权
公开(公告)号：US11561380B2
公开(公告)日：2023-01-24
申请号：US16955781
申请日：2018-12-19
申请人： NIDEC SANKYO CORPORATION
发明人： Yosuke Kanzaki
IPC分类号： G02B13/06 , G02B1/11 , G02B13/00 , G02B27/00 , G02B9/62
摘要： A wide-angle lens (100) includes a front group (110), an aperture (80), and a rear group (120). The front group (110) includes a first lens (10), a second lens (20), and a third lens (30) arranged in order from a side (La) closest to an object to an image side (Lb). In such a wide-angle lens, to suppress an occurrence of a ghost caused by multiple reflection between a lens surface (22) of the second lens (20) on the image side (Lb) and a lens surface (31) of the third lens (30) on the object side (La), the sag amount Sag31 (mm) and the diameter D31 (mm) of the lens surface (31) satisfy the following conditional expression: 0

4. 发明授权

US10534158B2 Wide angle lens 有权
公开(公告)号：US10534158B2
公开(公告)日：2020-01-14
申请号：US15719574
申请日：2017-09-29
申请人： NIDEC SANKYO CORPORATION
发明人： Yosuke Kanzaki
IPC分类号： G02B9/64 , G02B13/00 , G02B13/06
摘要： A wide angle lens includes a first lens, a second lens, a third lens, a fourth lens, a diaphragm, a fifth lens, a sixth lens and a seventh lens which are disposed in order from an object side. The first, second, third and sixth lenses are negative meniscus lenses, and the fourth, fifth and seventh lenses are positive lenses. The fifth lens is a glass lens, and the second, third, fourth, sixth and seventh lenses are plastic lenses. The sixth lens and the seventh lens constitute a cemented lens. When a center curvature radius on an image side face of the fifth lens is R52 and a focal length of an entire wide angle lens is f0, the center curvature radius R52 and the focal length f0 satisfy the following conditional expression: 2×f0≤|R52|≤5×f0.

5. 发明授权

US12072467B2 Wide-angle lens 有权
公开(公告)号：US12072467B2
公开(公告)日：2024-08-27
申请号：US17622690
申请日：2020-06-24
申请人： NIDEC SANKYO CORPORATION
发明人： Yosuke Kanzaki
IPC分类号： G02B13/06 , G02B9/08 , G02B9/10 , G02B13/00
CPC分类号： G02B13/06 , G02B9/08 , G02B9/10 , G02B13/003 , G02B13/006
摘要： The present invention provides a wide-angle lens capable of obtaining a suitable negative power even when a thickness of a first lens is increased in order to increase strength against impact. The wide-angle lens 100 has a front group 110, an aperture 80, and a rear group 120. Assuming that a central thickness in an optical axis direction of a first lens 10 is T1 (mm) and a focal length of the entire lens system is f0 (mm), the following conditional expression:

1.500≤T1/f0≤2.000 Conditional expression (1)

is satisfied. Therefore, it is possible to suppress the first lens 10 from being damaged by impact. In addition, it is possible to prevent the first lens 10 from becoming too thick to obtain suitable negative power.

6. 发明授权

US11808921B2 Wide-angle lens including seven lenses of—+++-+ refractive powers 有权
$Wide-angle lens including seven lenses of—+++-+ refractive powers$
公开(公告)号：US11808921B2
公开(公告)日：2023-11-07
申请号：US17117063
申请日：2020-12-09
申请人： NIDEC SANKYO CORPORATION
发明人： Yosuke Kanzaki , Tadashi Komiyama
IPC分类号： G02B13/00 , G02B13/06 , G02B9/64
CPC分类号： G02B13/0045 , G02B9/64 , G02B13/06
摘要： Provided is a wide-angle lens, including a first lens, a second lens, a third lens, a fourth lens, a diaphragm, a fifth lens, a sixth lens, and a seventh lens, sequentially arranged from an object side. An object-to-image distance of the wide-angle lens is set to d, an entrance pupil diameter of the wide-angle lens is set to HEP, and d/HEP

7. 发明授权

US11249274B2 Lens unit 有权
公开(公告)号：US11249274B2
公开(公告)日：2022-02-15
申请号：US16626324
申请日：2018-06-11
申请人： NIDEC SANKYO CORPORATION
发明人： Yosuke Kanzaki
IPC分类号： G02B1/10 , G02B7/02 , G02B1/04 , G02B13/00 , G02B27/00
摘要： Provided is a lens unit. A second lens is provided with a flange surface section that surrounds a lens surface. An image-side flange surface has an image-side flange surface inner-circumferential section which is shaped like a ring-shaped groove, and also has a ring-shaped image-side flange surface outer-circumferential section formed to the outside of the inner-circumferential section. The image-side flange surface inner-outer circumferential section is coated with black ink. The image-side flange surface outer-circumferential section is provided with boss-shaped positioning surface at six equidistant locations along the outer circumference. Ejector pin contact sections are formed between adjacent positioning surface, and said contact sections contact the ejector pins at the time of separation from the mold during resin molding.

8. 发明授权

US11407188B2 Manufacturing method of plastic lens 有权
公开(公告)号：US11407188B2
公开(公告)日：2022-08-09
申请号：US16626880
申请日：2018-06-11
申请人： NIDEC SANKYO CORPORATION
发明人： Yosuke Kanzaki
IPC分类号： B29D11/00 , B29C45/40 , G02B7/02 , G02B13/18 , B29L11/00
摘要： A manufacturing method of a plastic lens formed by using a metal mold having a fixed mold and a movable mold. The plastic lens comprises a flange part surrounding a lens face, and an image side face of the flange part comprises a black coating part and an outer peripheral part. The manufacturing method may include a molding process in which the plastic lens is molded by using the fixed mold for molding an object side lens face and the movable mold for molding an image side lens face and the flange part, a mold opening process in which the metal mold is opened by moving the movable mold, and a pushing-out process in which the outer peripheral part is pushed out by an ejector pin disposed in the movable mold when the mold opening process is performed or, after the mold opening process has been performed.

9. 发明授权

US11119293B2 Imaging lens system 有权
公开(公告)号：US11119293B2
公开(公告)日：2021-09-14
申请号：US16481121
申请日：2018-01-19
申请人： NIDEC SANKYO CORPORATION
发明人： Tadashi Komiyama , Yosuke Kanzaki
IPC分类号： G02B9/64 , G02B13/00 , G02B13/18
摘要： An imaging lens system may include a first lens; a second lens; a third lens; a diaphragm; a fourth lens; a fifth lens; a sixth lens; and a seventh lens. The first lens may be a positive meniscus lens. The second lens may be a negative meniscus lens. The third lens may be a meniscus lens comprising. The fourth lens may be a positive lens. The fifth lens may be a positive lens. The sixth lens may be a negative lens comprising a sixth lens concave surface facing the image side. The seventh lens may be a positive lens comprising a seventh lens convex surface facing the object side. The fifth lens may be a glass lens. The second, third, fourth, sixth and seventh lenses may be plastic lenses. The sixth lens concave surface may be joined to the seventh lens convex surface with an adhesive.

10. 发明授权

US10520696B2 In-vehicle camera lens unit 有权
公开(公告)号：US10520696B2
公开(公告)日：2019-12-31
申请号：US15580689
申请日：2016-06-10
申请人： NIDEC SANKYO CORPORATION
发明人： Yosuke Kanzaki
IPC分类号： G02B7/02 , G02B9/62 , G02B13/18
摘要： An in-vehicle camera lens unit having stable temperature characteristics even when lenses are mounted in a resin holder is provided. With an in-vehicle camera lens unit, a first lens, a second lens, a third lens, a diaphragm, a fourth lens, a fifth lens, and a sixth lens, which are disposed in this order from an object side to an image side, are held in a resin holder. The first lens 1, the second lens, the fifth lens, and the sixth lens are glass lenses, and of the third lens and the fourth lens disposed on both sides of the diaphragm, the third lens, which is a meniscus lens, is a plastic lens, and the fourth lens, which is a double convex lens, is a glass lens.

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