WO2013073189A1 - Barillet de lentille - Google Patents

Barillet de lentille Download PDF

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Publication number
WO2013073189A1
WO2013073189A1 PCT/JP2012/007345 JP2012007345W WO2013073189A1 WO 2013073189 A1 WO2013073189 A1 WO 2013073189A1 JP 2012007345 W JP2012007345 W JP 2012007345W WO 2013073189 A1 WO2013073189 A1 WO 2013073189A1
Authority
WO
WIPO (PCT)
Prior art keywords
frame
lens barrel
optical axis
fixed frame
shielding member
Prior art date
Application number
PCT/JP2012/007345
Other languages
English (en)
Japanese (ja)
Inventor
岩崎　真一
直樹 吉川
西村　直人
Original Assignee
パナソニック株式会社
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by パナソニック株式会社 filed Critical パナソニック株式会社
Publication of WO2013073189A1 publication Critical patent/WO2013073189A1/fr

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Classifications

    • 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
    • G02B7/04—Mountings, adjusting means, or light-tight connections, for optical elements for lenses with mechanism for focusing or varying magnification
    • G02B7/10—Mountings, adjusting means, or light-tight connections, for optical elements for lenses with mechanism for focusing or varying magnification by relative axial movement of several lenses, e.g. of varifocal objective lens
    • G02B7/102—Mountings, adjusting means, or light-tight connections, for optical elements for lenses with mechanism for focusing or varying magnification by relative axial movement of several lenses, e.g. of varifocal objective lens controlled by a microcomputer
    • 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
    • G02B13/00—Optical objectives specially designed for the purposes specified below
    • G02B13/001—Miniaturised objectives for electronic devices, e.g. portable telephones, webcams, PDAs, small digital cameras
    • G02B13/0055—Miniaturised objectives for electronic devices, e.g. portable telephones, webcams, PDAs, small digital cameras employing a special optical element
    • G02B13/0065—Miniaturised objectives for electronic devices, e.g. portable telephones, webcams, PDAs, small digital cameras employing a special optical element having a beam-folding prism or mirror

Definitions

  • the technology disclosed herein relates to a lens barrel provided with an optical system.
  • the technology disclosed herein has been made in view of the above situation, and an object thereof is to provide a lens barrel that can more effectively suppress flare and ghost.
  • the technique disclosed herein is a lens barrel that bends light incident along a first optical axis by a reflecting member into light along a second optical axis that is substantially orthogonal to the first optical axis. And a shielding member.
  • the frame has a second optical axis guided by a plurality of lenses passing through the inside thereof.
  • the shielding member is attached to the frame and has an inner surface exposed to the inside through which the second optical axis passes. At least a part of the inner surface has a light reflectance lower than that of the inner surface of the frame.
  • FIG. 1 is an exploded perspective view of a lens barrel according to the present embodiment. Sectional drawing of the lens-barrel of FIG. Sectional drawing of the lens-barrel of FIG. The figure for demonstrating the reflection of the light in the inner surface of the fixed frame contained in the lens barrel of FIG. Sectional drawing of the lens-barrel which concerns on other embodiment.
  • FIG. 1 is an exploded perspective view of a lens barrel 1 according to the embodiment.
  • FIG. 2 is a cross-sectional view of the lens barrel 1 according to the embodiment.
  • FIG. 2 is a cross-sectional view of the lens barrel 1 taken along a plane including the first optical axis AX1 and the second optical axis AX2.
  • the direction along the first optical axis AX1 is the “first direction”
  • the direction along the second optical axis AX2 orthogonal to the first optical axis AX1 is the “second direction”
  • the first light is referred to as a “third direction”.
  • the lens barrel 1 includes a first group frame 100, a second group frame 200, a zoom motor 300, a shutter unit 400, an image blur correction unit 500, a fixed frame (an example of a frame), A first shielding plate 610, a second shielding plate 620, a fourth group frame 700, a focus motor 800, and an image sensor 900 are provided.
  • the first group frame 100 holds the front lens group L1, the prism L2, and the fixed lens L3.
  • the front lens group L1 has a first optical axis AX1.
  • the prism L2 bends the light beam incident from the first direction along the first optical axis AX1 in the second direction along the second optical axis AX2 orthogonal to the first optical axis AX1.
  • the second group frame 200 holds the zoom lens group L4 having a zooming action.
  • the second group frame 200 is held movably in the second direction inside the first group frame 100.
  • the zoom lens group L4 is disposed on the imaging element 900 side of the prism L2.
  • the zoom motor 300 is attached to the side surface of the first group frame 100.
  • the zoom motor 300 moves the second group frame 200 in the second direction inside the first group frame 100.
  • the shutter unit 400 adjusts the amount of light hitting the image sensor 900 by controlling the shielding and passage of light toward the image sensor 900.
  • the shutter unit 400 is attached to the image sensor 900 side in the first group frame 100.
  • the image blur correction unit 500 corrects the blur of the image formed on the image sensor 900.
  • the image blur correction unit 500 is disposed on the image sensor 900 side of the shutter unit 400.
  • the image blur correction unit 500 includes a movable frame 510 and a third group frame 520.
  • the movable frame 510 is disposed on the image sensor 900 side of the shutter unit 400 and holds the image blur correction lens L5.
  • the movable frame 510 is supported by the third group frame 520 so as to be movable in a plane perpendicular to the second optical axis AX2.
  • the third group frame 520 includes hall elements and coils (not shown).
  • the third group frame 520 is connected to the first group frame 100.
  • the third group frame 520 is supported by the fixed frame 600.
  • the fixed frame 600 (an example of a frame) supports the third group frame 520 on the prism L2 side.
  • the fixed frame 600 holds the fourth group frame 700 so as to be slidable in the second direction.
  • the fixed lens group L7 is fixed to the lower end of the fixed frame 600 (the end on the image sensor 900 side).
  • a focus motor 800 is attached to the side surface of the fixed frame 600.
  • a rectangular annular light blocking portion 601 protruding toward the second optical axis AX2 is formed on the inner periphery of the lower end portion of the fixed frame 600.
  • the light blocking portion 601 is disposed closer to the image sensor 900 than first and second through holes T1 and T2 described later.
  • the light blocking unit 601 prevents unnecessary light emitted from the focus lens group L6 or unnecessary light reflected by first and second shielding members 610 and 620 described later from entering the fixed lens group L7.
  • the fixed frame 600 has first and second through holes T1 and T2 (an example of a through hole).
  • the first and second through holes T ⁇ b> 1 and T ⁇ b> 2 are formed in part of the wall surface provided along the second direction in the fixed frame 600. More specifically, the first and second through holes T ⁇ b> 1 and T ⁇ b> 2 are provided on the wall surfaces orthogonal to the first direction along the first optical axis AX ⁇ b> 1 in the fixed frame 600.
  • the first through hole T1 passes through the fixed frame 600 from the first outer surface S1 side orthogonal to the first direction along the first optical axis AX1 to the first inner surface S2.
  • the second through hole T2 passes through the fixed frame 600 from the second outer surface S3 side orthogonal to the first optical axis AX1 to the second inner surface S4.
  • the first shielding plate 610 (an example of a shielding member) is formed in a plate shape.
  • the first shielding plate 610 is disposed on the first outer surface S1 from the outside of the fixed frame 600 so as to block the first through hole T1. More specifically, the 1st shielding board 610 is arrange
  • the second shielding plate 620 (an example of a shielding member) is formed in a plate shape.
  • the second shielding plate 620 is disposed on the second outer surface S3 from the outside of the fixed frame 600 so as to block the second through hole T2.
  • the light reflectance of the first inner surface 610S exposed to the inside of the fixed frame 600 in the first shielding plate 610 is lower than the light reflectance of the first inner surface S2 of the fixed frame 600.
  • the light reflectance of the second inner surface 620S exposed in the fixed frame 600 in the second shielding plate 620 is lower than the light reflectance of the second inner surface S4 of the fixed frame 600.
  • the first and second inner surfaces 610S and 620S are subjected to a treatment for suppressing the reflectance by, for example, forming fine irregularities, grooves or flocking, forming inclined surfaces or curved surfaces, and applying black paint. ing.
  • the first and second shielding members 610 and 620 may be fixed to the fixed frame 600 with an adhesive or the like.
  • the first inner surface 610S of the first shielding plate 610 is disposed outside the first inner surface S2 of the fixed frame 600 with the second optical axis AX2 as a reference.
  • the second inner surface 620S of the second shielding plate 620 is disposed outside the second inner surface S4 of the fixed frame 600 with the second optical axis AX2 as a reference.
  • the first inner surface 610S of the first shielding plate 610 is disposed adjacent to a stepped portion formed by the portion of the fixed frame 600 in which the first through hole T1 is formed.
  • the second inner surface 620S of the second shielding plate 620 is disposed adjacent to a step portion formed by the portion of the fixed frame 600 in which the second through hole T2 is formed.
  • the light incident downward in the figure is hardly reflected on the first inner surface 610S than the light incident along the solid line in the figure, and is fixed even when a small amount of reflected light is generated. Since the light can be scattered at the step portion formed by the frame 600, the amount of unnecessary light incident on the image sensor 900 can be more effectively reduced.
  • first and second shielding plates 610 and 620 are provided between the shutter unit 400 and the image sensor 900 described above in the second direction along the second optical axis AX2.
  • first and second inner surfaces S2 and S4 which are likely to receive the strongest light inside the fixed frame 600, has a reflectance higher than that of the first and second inner surfaces S2 and S4.
  • the first and second inner surfaces 610S and 620S of the first and second shielding members 610 and 620 having a low height can be replaced.
  • the fourth group frame 700 holds a focus lens group L6 having a focus adjusting action.
  • the fourth group frame 700 is slidably held in the second direction inside the fixed frame 600.
  • the fourth group frame 700 is disposed on the image sensor 900 side of the image blur correction lens L5.
  • the fourth group frame 700 is driven by the focus motor 800.
  • the focus motor 800 is attached to the side surface of the fixed frame 600.
  • a shield plate 810 is attached to the lower end surface of the focus motor 800.
  • the shield plate 810 is made of a high permeability material.
  • the shield plate 810 shields the lines of magnetic force generated from the focus motor 800 from going to the image sensor 900.
  • the image sensor 900 is bonded and fixed to the sheet metal 910.
  • the sheet metal 910 is fixed to the lower end portion of the fixed frame 600 with the shielding member 930 interposed therebetween.
  • the image sensor 900 is electrically connected to the flexible printed circuit board 920.
  • FIG. 3 is a view taken in the direction of arrows III-III in FIG.
  • the focus lens group L6 has a first curved face M1, a second curved face M2, a first plane N1, and a second plane N2.
  • the first and second planes N1, N2 are each perpendicular to the first direction along the first optical axis AX1. That is, the first plane N1 is substantially parallel to the first inner surface S2 of the fixed frame 600 and the first inner surface 610S of the first shielding plate 610. The second plane N2 is substantially parallel to the second inner surface S4 of the fixed frame 600 and the second inner surface 620S of the second shielding plate 620.
  • the focus lens unit L6 includes the first and second planes N1 and N2, the focus lens unit L6 is reduced in size and the lens barrel 1 is reduced in thickness in the first direction along the first optical axis AX1. Is realized.
  • unnecessary light emitted from the focus lens group L6 tends to be strong on the first and second inner surfaces S2 and S4 of the fixed frame 600 facing the first and second planes N1 and N2. .
  • the lens barrel 1 includes a fixed frame 600 and a first shielding plate 610.
  • the fixed frame 600 has a first through hole T1 formed in a wall extending in the second direction.
  • the first shielding plate 610 is disposed so as to block the first through hole T1 from the first outer surface S1 of the fixed frame 600.
  • the light reflectance of the first inner surface 610S exposed in the fixed frame 600 of the first shielding plate 610 is lower than the light reflectance of the first inner surface S2 of the fixed frame 600.
  • the material of the first shielding plate 610 is used regardless of whether or not it is suitable as the material of the lens barrel 1. Can be widely selected.
  • the first through hole T1 is closed by the first shielding plate 610, it is possible to suppress the entry of dust and light into the lens barrel 1 through the first through hole T1.
  • the first inner surface 610S of the first shielding plate 610 is disposed outside the first inner surface S2 of the fixed frame 600 with the second optical axis AX2 as a reference.
  • a recess 605 having the first inner surface 610S as a bottom surface is formed in the first inner surface S2. Therefore, the luminous flux P1 of unnecessary light (see solid line arrow) reflected in a small amount on the first inner surface S2 having low reflectivity is used as unnecessary light (dotted arrow in the conventional configuration in which the concave portion 605 is not formed on the first inner surface S2. Reference) light flux P2.
  • the first through hole T1 is formed in the first inner surface S2 of the fixed frame 600 that is substantially parallel to the first plane N1 of the focus lens group L6.
  • the first shielding plate 610 is disposed in a recess 602 formed in the first outer surface S1 of the fixed frame 600.
  • the size of the lens barrel 1 can be reduced.
  • the fixed frame 600 has the first and second through holes T1 and T2.
  • the present invention is not limited to this.
  • the fixed frame 600 does not have a through-hole, and the first and second shielding members 610 and 620 are attached to the inner surfaces S2 and S4 of the fixed frame 600, respectively. May be. Even in this case, since the reflectance of the inner surfaces 610S and 620S of the first and second shielding members 610.620 is lower than that of the inner surfaces S2 and S4 of the fixed frame 600, the same effect as in the above embodiment can be obtained.
  • the first and second through holes T1 and T2 are formed on the wall of the fixed frame 600 that is orthogonal to the first optical axis AX1, but the present invention is not limited to this.
  • first and second through holes T1 and T2 may be formed on the wall surfaces of the fixed frame 600 parallel to the first optical axis AX1, respectively.
  • the first and second shielding members 610 and 620 are not inserted into the first and second through holes T1 and T2.
  • the present invention is not limited to this.
  • first and second shielding members 610 and 620 may be inserted into the first and second through holes T1 and T2.
  • the first and second inner surfaces 610S and 620S may protrude inward from the first and second inner surfaces S2 and S4.
  • the first and second through holes T1 and T2 are formed in the fixed frame 600.
  • the present invention is not limited to this.
  • first and second through holes T1 and T2 may be formed in the first group frame 100, the second group frame 200, or the third group frame 520.
  • first and second through holes T1 and T2 may be formed in the first group frame 100 between the front lens group L1 and the prism L2.
  • the light reflectance of the first inner surface S2 of the fixed frame 600 may not be lower than the entire surface of the first inner surface 610S of the first shielding plate 610.
  • the fixed frame 600 in which the first and second through holes T1 and T2 are formed is formed in a rectangular tube shape, but is not limited thereto.
  • the fixed frame 600 may be formed in a cylindrical shape.
  • the first and second through holes T ⁇ b> 1 and T ⁇ b> 2 only need to be formed on the wall surface of the fixed frame 600 along the second direction.
  • a notch or the like may be formed in a part of the fixed frame instead of the through hole, and the notch or the like may be blocked by a shielding member.
  • a lens barrel capable of suppressing flare and ghost can be provided, and thus can be applied to, for example, a camera, a mobile phone with a camera, a portable terminal with a camera, and the like.

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  • Physics & Mathematics (AREA)
  • General Physics & Mathematics (AREA)
  • Optics & Photonics (AREA)
  • Engineering & Computer Science (AREA)
  • General Engineering & Computer Science (AREA)
  • Lens Barrels (AREA)
  • Studio Devices (AREA)

Abstract

L'invention concerne un barillet de lentille (1) doté d'un cadre fixe (600) et d'une première plaque de blindage (610). Un second axe optique (AX2), guidé par une pluralité de lentilles, passe à travers l'intérieur du cadre fixe (600). La première plaque de blindage (610) a une première surface interne (610S) qui est liée au cadre fixe (600), et qui est exposée au côté interne, à travers lequel le second axe optique (AX2) passe. Au moins une partie de la première surface interne (610S) a une réflectance optique inférieure à celle d'une première surface interne (S2) du cadre fixe (600).
PCT/JP2012/007345 2011-11-17 2012-11-15 Barillet de lentille WO2013073189A1 (fr)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
JP2011252075A JP2015025826A (ja) 2011-11-17 2011-11-17 レンズ鏡筒
JP2011-252075 2011-11-17

Publications (1)

Publication Number Publication Date
WO2013073189A1 true WO2013073189A1 (fr) 2013-05-23

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ID=48429282

Family Applications (1)

Application Number Title Priority Date Filing Date
PCT/JP2012/007345 WO2013073189A1 (fr) 2011-11-17 2012-11-15 Barillet de lentille

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JP (1) JP2015025826A (fr)
WO (1) WO2013073189A1 (fr)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US20220011590A1 (en) * 2020-07-10 2022-01-13 Samsung Electro-Mechanics Co., Ltd. Camera module

Families Citing this family (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
KR102620517B1 (ko) * 2016-11-25 2024-01-03 삼성전기주식회사 카메라 모듈
TWI730297B (zh) 2018-02-27 2021-06-11 日商組合化學工業股份有限公司 巰基酚化合物的製造方法及巰基酚化合物的中間體

Citations (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPH02181129A (ja) * 1989-01-06 1990-07-13 Fuji Photo Film Co Ltd 撮影機能付感光材料包装ユニット
JP2001108879A (ja) * 1999-10-04 2001-04-20 Olympus Optical Co Ltd レンズ鏡枠及びこれを使用する電子カメラ

Patent Citations (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPH02181129A (ja) * 1989-01-06 1990-07-13 Fuji Photo Film Co Ltd 撮影機能付感光材料包装ユニット
JP2001108879A (ja) * 1999-10-04 2001-04-20 Olympus Optical Co Ltd レンズ鏡枠及びこれを使用する電子カメラ

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US20220011590A1 (en) * 2020-07-10 2022-01-13 Samsung Electro-Mechanics Co., Ltd. Camera module
CN113985684A (zh) * 2020-07-10 2022-01-28 三星电机株式会社 相机模块

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