WO2016084390A1 - レンズ、レンズユニット及び撮像装置 - Google Patents
レンズ、レンズユニット及び撮像装置 Download PDFInfo
- Publication number
- WO2016084390A1 WO2016084390A1 PCT/JP2015/005924 JP2015005924W WO2016084390A1 WO 2016084390 A1 WO2016084390 A1 WO 2016084390A1 JP 2015005924 W JP2015005924 W JP 2015005924W WO 2016084390 A1 WO2016084390 A1 WO 2016084390A1
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- WIPO (PCT)
- Prior art keywords
- lens
- contact
- inclined surface
- optical axis
- fixing member
- Prior art date
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Classifications
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- G—PHYSICS
- G02—OPTICS
- G02B—OPTICAL ELEMENTS, SYSTEMS OR APPARATUS
- G02B7/00—Mountings, adjusting means, or light-tight connections, for optical elements
- G02B7/02—Mountings, adjusting means, or light-tight connections, for optical elements for lenses
- G02B7/021—Mountings, adjusting means, or light-tight connections, for optical elements for lenses for more than one lens
-
- G—PHYSICS
- G02—OPTICS
- G02B—OPTICAL ELEMENTS, SYSTEMS OR APPARATUS
- G02B27/00—Optical systems or apparatus not provided for by any of the groups G02B1/00 - G02B26/00, G02B30/00
- G02B27/0018—Optical systems or apparatus not provided for by any of the groups G02B1/00 - G02B26/00, G02B30/00 with means for preventing ghost images
-
- G—PHYSICS
- G02—OPTICS
- G02B—OPTICAL ELEMENTS, SYSTEMS OR APPARATUS
- G02B7/00—Mountings, adjusting means, or light-tight connections, for optical elements
- G02B7/006—Filter holders
-
- G—PHYSICS
- G02—OPTICS
- G02B—OPTICAL ELEMENTS, SYSTEMS OR APPARATUS
- G02B7/00—Mountings, adjusting means, or light-tight connections, for optical elements
- G02B7/02—Mountings, adjusting means, or light-tight connections, for optical elements for lenses
- G02B7/022—Mountings, adjusting means, or light-tight connections, for optical elements for lenses lens and mount having complementary engagement means, e.g. screw/thread
Definitions
- the present invention relates to a lens, a lens unit, and an imaging device.
- Patent Document 1 discloses a structure in which a lens held in a lens barrel having a thread portion formed on the outer periphery is pressed by an annular pressing member (retainer) that is screwed into the screw portion of the lens barrel.
- An object of the present invention made in view of such circumstances is to provide a lens, a lens unit, and an imaging device that can easily prevent destruction.
- a lens according to an embodiment of the present invention has a lens body having a cylindrical surface along the optical axis direction, projects radially outward of the lens body, and extends from the image side to the object side along the optical axis of the lens body. And a fixed portion having an inclined surface connected to the lens body on the cylindrical surface.
- the lens unit includes the lens, a lens holder that is disposed radially outside the cylindrical surface, holds the lens, is connected to the lens holder, and the inclined surface. And a fixing member that presses and fixes the lens in the optical axis direction together with the lens holder.
- an imaging apparatus includes the lens unit and an imaging element that captures a subject image formed by the lens unit.
- the lens unit 10 includes a lens 20, a lens holder 30, and a fixing member 40.
- the lens holder 30 and the fixing member 40 are screwed together by screw fitting.
- the lens unit 10 forms a subject image of an object outside the lens unit 10 on an imaging surface.
- the lens 20 is held by a lens holder 30.
- the lens 20 includes a lens main body 21 and a fixing portion 22 configured to project from the lens main body 21 radially outward in a bowl shape.
- the fixed portion 22 has a diameter that decreases from the image side toward the object side along the optical axis of the lens body 21 (the diameter is reduced).
- the lens 20 is fixed to the lens holding body 30 in the optical axis direction by the fixing member 40 at the fixing portion 22.
- the fixing member 40 is a retainer, for example, and has a contact portion 41 that contacts the fixing portion 22.
- the lens body 21 has a cylindrical surface 23 along the optical axis direction that is connected to the lens surface 25 on the outer peripheral side of the lens body 21 and on the object side of the lens 20.
- the fixing portion 22 has an inclined surface 24.
- the inclined surface 24 is a surface formed on the object side of the fixed portion 22 by reducing the diameter of the fixed portion 22 along the optical axis of the lens body 21 from the image side toward the object side.
- the inclined surface 24 is connected to the lens body 21 at the cylindrical surface 23.
- the inclined surface 24 is linear in a cross-sectional view as shown in FIG.
- the inclined surface 24 forms a predetermined elevation angle ⁇ with respect to a surface (horizontal plane in FIG. 1) perpendicular to the optical axis direction from the outer peripheral side of the fixed portion 22 toward the cylindrical surface 23.
- FIG. 2 is a diagram illustrating a contact position between the inclined surface 24 of the lens 20 of FIG. 1 and the fixing member 40 in a top view of the lens 20.
- the lens 20 has a lens surface 25 in the center and an inclined surface 24 around the lens surface 25 in a top view.
- the lens 20 of the present embodiment is in contact with the fixing member 40 over the entire area of the inclined surface 24 shown by the oblique lines in FIG. That is, in the present embodiment, the lens 20 is pressed and fixed by the fixing member 40 in the region indicated by the oblique lines in FIG.
- the fixed portion 22 has the inclined surface 24, so that the thickness increases as the center of the lens 20 is closer. Therefore, the lens 20 according to the present embodiment is stronger against the impact force applied in the optical axis direction than the lens 20 that does not have the inclined surface 24, and the periphery of the boundary between the fixing member 40 and the lens surface 25. Even when an impact due to a foreign object is applied to the surface, it is difficult to be destroyed.
- FIG. 3 is an enlarged view of the fixing portion 22 and its periphery.
- the fixing portion 22 when an impact due to a foreign object is applied to the periphery of the boundary between the fixing member 40 and the lens surface 25, the fixing portion 22 is passed through the fixing member 40 in the optical axis direction. An impact force is generated (downward in FIG. 3).
- the fixing portion 22 since the fixing portion 22 has the inclined surface 24, the impact force of the fixing portion 22 is expressed by being decomposed into a direction along the inclined surface 24 and a direction perpendicular to the inclined surface 24 as shown in FIG. it can.
- the fixed portion 22 has the inclined surface 24, so that the impact force in the optical axis direction can be dispersed. Therefore, the lens 20 according to the present embodiment is less likely to be destroyed than the lens 20 that does not have the inclined surface 24.
- the elevation angle ⁇ of the inclined surface 24 is appropriately set according to the design of the lens unit 10.
- the elevation angle ⁇ is preferably an angle at which the impact force is not easily broken and the impact force can be dispersed.
- the elevation angle ⁇ is an angle in a range of, for example, 10 ° or more and less than 70 °.
- the elevation angle ⁇ By setting the elevation angle ⁇ to 10 ° or more, the impact force in the optical axis direction is dispersed and the thickness of the fixing portion 22 is increased, so that the lens 20 is not easily broken.
- the elevation angle ⁇ to less than 70 °, the lens 20 can be fixed to the lens holder 30 by the fixing member 40.
- the elevation angle ⁇ is 70 ° or more, the force with which the fixing member 40 fixes the lens 20 is weakened, and the lens 20 may not be properly fixed.
- FIG. 4 is a side sectional view showing a schematic configuration of a lens unit according to the second embodiment of the present invention.
- the fixing member 40 has a stepped contact portion 41 in a sectional view.
- the lens 20 of the present embodiment is in contact with the fixing member 40 by two concentric lines centering on the optical axis over the entire circumferential direction on the inclined surface 24. Therefore, in the present embodiment, the lens 20 is fixed by being pressed by the fixing member 40 in the linear shape shown by the broken line in FIG.
- the lens 20 since the lens 20 has the inclined surface 24, the lens 20 is less likely to be destroyed as compared with the lens that does not have the inclined surface 24, as in the first embodiment. Further, in the present embodiment, when an impact due to a foreign substance is applied to the periphery of the boundary between the fixing member 40 and the lens surface 25, an impact force is applied to the fixing portion 22 on a line concentrically contacting the fixing portion 22. . Therefore, the location where the impact force due to the foreign matter is applied to the fixed portion 22 can be determined by the design of the contact portion 41.
- FIG. 6 is a side sectional view showing a schematic configuration of a lens unit according to the third embodiment of the present invention.
- the lens unit includes four lenses L1, L2, L3, and L4.
- the four lenses L1, L2, L3, and L4 are held in the lens unit so as to overlap in this order from the object side to the image side.
- the diameter of the lens L4 is larger than the diameter of the lens L3, the diameter of the lens L3 is larger than the diameter of the lens L2, and the diameter of the lens L2 is larger than the maximum diameter of the lens L1.
- the lens L1 projects outward in the radial direction of the lens L1 main body, decreases in diameter as it goes from the image side to the object side along the optical axis of the lens main body, and the inclined surface 24 is connected to the lens L1 main body on the cylindrical surface 23.
- the lens L1 is pressed and fixed to the lens holder 30 located on the object side along the optical axis direction by the fixing member 40 via the lenses L2, L3, and L4.
- the fixing member 40 is in contact with the image side surface of the lens L4 located closest to the image side.
- the inclined surface 24 of the fixing portion 22 is in contact with the lens holder 30. Therefore, in the present embodiment, the lens L1 is pressed by the lens holder 30 in the optical axis direction.
- the lenses L1, L2, L3, and L4 form a stepped side peripheral surface 26 in a side sectional view of the lens unit.
- the surface perpendicular to the optical axis that is, the end of the object side surface of each of the lenses L1, L2, L3, and L4 is not in contact with the lens holder 30 and is a surface parallel to the optical axis. Is in contact with the lens holder 30.
- the lens L1 since the lens L1 has the inclined surface 24, the lens L1 is less likely to be destroyed as compared with a lens that does not have the inclined surface 24, as in the first embodiment.
- the fixing portion 22 contacts the fixing member 40 with two concentric lines centered on the optical axis by the contact portion 41 formed in a step shape.
- the contact between 22 and the fixing member 40 is not limited to two lines.
- the fixing portion 22 and the fixing member 40 may be in contact with one or three or more concentric lines.
- the contact portion 41 is formed in a step shape, but the shape of the contact portion 41 is not limited to a step shape.
- the contact portion 41 may have an arbitrary structure as long as the contact portion 41 is in contact with the inclined surface 24 of the fixed portion 22 by a concentric line centered on the optical axis.
- the lens 20 has been described as being fixed by the fixing member 40 by continuous surface contact or line contact with the fixing member 40 in the fixing portion 22.
- the contact with the fixing member 40 is not limited to a continuous one.
- the contact portion 41 is configured to intermittently contact the inclined surface 24 in a concentric circumferential direction centering on the optical axis, and the fixed portion 22 intermittently contacts the fixing member 40 on the inclined surface 24. May be.
- the contact portion 41 has a planar convex portion protruding to the image side so as to make surface contact with the inclined surface 24, and a concave portion recessed from the image side so as not to contact the inclined surface 24.
- the contact part 41 is in surface contact with the inclined surface 24 at the intermittently formed convex part.
- the convex portions are provided at four equal intervals along the circumference, for example, as shown in the top view of the lens 20 in FIG. 7A, the inclined surface 24 and the fixing member 40 are indicated by oblique lines. Intermittent surface contact in the region.
- the contact portion 41 is configured in such a manner that the convex portion and the concave portion are sequentially provided along the circumference in the same manner as in the above-described example, and the convex portion Is configured in a stepped manner as described in the second embodiment.
- the contact portion 41 is in line contact with the inclined surface 24 at a location where the contact portion 41 protrudes from the inclined surface 24 of the convex portion configured intermittently.
- the convex portions are provided at four equal intervals along the circumference, for example, as shown in the top view of the lens 20 in FIG. 7B, the inclined surface 24 and the fixing member 40 are indicated by broken lines. Intermittent line contact on the line.
- the inclined surface 24 has been described as a straight line in a sectional view, but the shape of the inclined surface is not limited thereto.
- the inclined surface 24 may be configured to be a curved surface in a sectional view.
- the contact portion 41 of the fixing member 40 is appropriately configured so as to be in surface contact or line contact with the inclined surface 24 in accordance with the shape of the inclined surface 24.
- the fixing member 40 is described as a retainer.
- the fixing member 40 is not limited to a retainer.
- the fixing member 40 may be fixed by pressing the fixing portion 22 with a caulking structure.
- FIG. 8 is a functional block diagram illustrating a schematic configuration of an imaging apparatus including a lens unit.
- the imaging device 60 includes the lens unit 10 described in the first and second embodiments and the imaging element 50.
- the image sensor 50 captures a subject image formed on the image plane by the lens unit 10.
- the lens 20 has the inclined surface 24, so that the lens 20 is not easily destroyed.
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- Physics & Mathematics (AREA)
- General Physics & Mathematics (AREA)
- Optics & Photonics (AREA)
- Lens Barrels (AREA)
Abstract
Description
レンズユニット10は、図1に示すように、レンズ20と、レンズ保持体30と、固定部材40とを備える。レンズ保持体30と固定部材40とは、ねじ嵌合によって螺合する。レンズユニット10は、レンズユニット10の外部の物体の被写体像を結像面に結像する。
図4は、本発明の第2実施形態に係るレンズユニットの概略構成を示す側断面図である。第2実施形態において、固定部材40は、断面視において階段状の接触部41を有する。以下、第1実施形態と同じ点については説明を省略し、異なる点について説明を行う。
図6は、本発明の第3実施形態に係るレンズユニットの概略構成を示す側断面図である。第3実施形態において、レンズユニットは、4枚のレンズL1、L2、L3及びL4を備える。4枚のレンズL1、L2、L3及びL4は、この順で、物体側から像側に重ねてレンズユニット内に保持されている。レンズL4の直径は、レンズL3の直径よりも大きく、レンズL3の直径は、レンズL2の直径よりも大きく、レンズL2の直径は、レンズL1の最大直径よりも大きい。レンズL1は、レンズL1本体の径方向外側に突出し、レンズ本体の光軸に沿って像側から物体側に向かうに連れて縮径するとともに、円筒面23においてレンズL1本体に連結する傾斜面24を有する。以下、第1実施形態と同じ点については説明を省略し、異なる点について説明を行う。
20、L1、L2、L3、L4 レンズ
21 レンズ本体
22 固定部
23 円筒面
24 傾斜面
25 レンズ面
26 側周面
30 レンズ保持体
40 固定部材
41 接触部
50 撮像素子
60 撮像装置
Claims (7)
- 光軸方向に沿った円筒面を有するレンズ本体と、
前記レンズ本体の径方向外側に突出し、前記レンズ本体の光軸に沿って像側から物体側に向かうに連れて径が小さくなるとともに、前記円筒面において前記レンズ本体に連結する傾斜面を有する固定部と
を備えることを特徴とするレンズ。 - 請求項1に記載のレンズと、
前記円筒面の径方向外側に配置され、前記レンズを保持するレンズ保持体と、
該レンズ保持体に連結され、前記傾斜面に接触して前記レンズ保持体とともに前記レンズを前記光軸方向に押圧して固定する固定部材と
を備えるレンズユニット。 - 請求項1に記載のレンズと、
前記円筒面の径方向外側に配置され、前記傾斜面に接触して前記レンズを保持するレンズ保持体と、
該レンズ保持体に連結され、前記レンズ保持体とともに前記レンズを前記光軸方向に押圧して固定する固定部材と
を備えるレンズユニット。 - 前記接触は面接触である、請求項2又は3に記載のレンズユニット。
- 前記接触は前記光軸を中心とする同心円状の線接触である、請求項2又は3に記載のレンズユニット。
- 前記接触は前記光軸を中心とする同心円の円周方向に断続的な接触である、請求項2又は3に記載のレンズユニット。
- 請求項2乃至6のいずれか一項に記載のレンズユニットと、
前記レンズユニットにより結像される被写体像を撮像する撮像素子と
を備える撮像装置。
Priority Applications (3)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
US15/531,215 US10705330B2 (en) | 2014-11-27 | 2015-11-27 | Lens, lens unit, and imaging apparatus |
JP2016561260A JP6422506B2 (ja) | 2014-11-27 | 2015-11-27 | レンズ、レンズユニット及び撮像装置 |
EP15864176.1A EP3226051B1 (en) | 2014-11-27 | 2015-11-27 | Lens, lens unit, and imaging device |
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JP2014240359 | 2014-11-27 | ||
JP2014-240359 | 2014-11-27 |
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PCT/JP2015/005924 WO2016084390A1 (ja) | 2014-11-27 | 2015-11-27 | レンズ、レンズユニット及び撮像装置 |
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US (1) | US10705330B2 (ja) |
EP (1) | EP3226051B1 (ja) |
JP (1) | JP6422506B2 (ja) |
WO (1) | WO2016084390A1 (ja) |
Cited By (3)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
JP2017219571A (ja) * | 2016-06-03 | 2017-12-14 | マクセルホールディングス株式会社 | カメラ用レンズユニットおよび車載カメラ |
JP2019101217A (ja) * | 2017-12-01 | 2019-06-24 | 株式会社ミツトヨ | レンズ保持機構及び発光ユニット |
WO2020258325A1 (zh) * | 2019-06-28 | 2020-12-30 | 瑞声光学解决方案私人有限公司 | 光学镜头 |
Families Citing this family (1)
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CN221726270U (zh) * | 2023-02-17 | 2024-09-17 | 大立光电股份有限公司 | 塑胶透镜、光学成像模块及电子装置 |
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US10705330B2 (en) | 2020-07-07 |
JP6422506B2 (ja) | 2018-11-14 |
US20170329131A1 (en) | 2017-11-16 |
EP3226051B1 (en) | 2020-12-23 |
EP3226051A4 (en) | 2018-07-04 |
JPWO2016084390A1 (ja) | 2017-04-27 |
EP3226051A1 (en) | 2017-10-04 |
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