WO2008056534A1 - Cône de caméra à objectif - Google Patents

Cône de caméra à objectif Download PDF

Info

Publication number
WO2008056534A1
WO2008056534A1 PCT/JP2007/070610 JP2007070610W WO2008056534A1 WO 2008056534 A1 WO2008056534 A1 WO 2008056534A1 JP 2007070610 W JP2007070610 W JP 2007070610W WO 2008056534 A1 WO2008056534 A1 WO 2008056534A1
Authority
WO
WIPO (PCT)
Prior art keywords
lens
frame member
camera
outer frame
internal frame
Prior art date
Application number
PCT/JP2007/070610
Other languages
English (en)
Japanese (ja)
Inventor
Hiromu Umeda
Original Assignee
Konica Minolta Opto, Inc.
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 Konica Minolta Opto, Inc. filed Critical Konica Minolta Opto, Inc.
Priority to JP2008543029A priority Critical patent/JP5146319B2/ja
Publication of WO2008056534A1 publication Critical patent/WO2008056534A1/fr

Links

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
    • G02B7/022—Mountings, adjusting means, or light-tight connections, for optical elements for lenses lens and mount having complementary engagement means, e.g. screw/thread
    • 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
    • G02B7/028—Mountings, adjusting means, or light-tight connections, for optical elements for lenses with means for compensating for changes in temperature or for controlling the temperature; thermal stabilisation

Definitions

  • the present invention relates to an imaging lens barrel, and more particularly to an in-vehicle lens barrel that is suitable for use in an environment that directly touches the outside air and has a large temperature and humidity change.
  • Imaging devices such as digital cameras and shooting in rainy weather are often protected by a cover, so the lens barrel that holds the lens is usually considered for environmental performance. There is little to be done. Therefore, the lens barrel is composed of one kind of material considering moisture absorption characteristics (see Patent Document 1).
  • Patent Document 1 Japanese Patent Laid-Open No. 2005-274633
  • a camera or the like that displays an image on the rear side or on the passenger seat side that supports the operation of the driver is mounted on the vehicle.
  • in-vehicle cameras are always exposed to the harsh environment of being exposed to the sun's ultraviolet rays, rainfall, snowfall, and snow melting agents. Therefore, it is conceivable that the lens barrel exposed to the outside world is composed of, for example, PPA (polyphthalamide) which is a “crystalline plastic” having excellent environmental performance.
  • PPA polyphthalamide
  • the forces S and PP A have relatively high hygroscopicity, so when used as a lens barrel, even if it is precisely adjusted during assembly, swelling deformation occurs when used in a high humidity environment. There is a risk of looseness between the holding lens and optical characteristics.
  • the present invention has been made in view of power and problems of the related art, and an object of the present invention is to provide a lens barrel capable of maintaining good optical characteristics while maintaining environmental performance. Means to solve the problem
  • the lens barrel of the present invention is a lens barrel that holds a plurality of lenses! /, And an outer frame member that supports at least a first lens group having a first lens closest to the subject, Outer frame And an inner frame member that supports the second lens group disposed behind the first lens group, and the first resin material forming the outer frame member includes the inner frame member. It is different from the second resin material to be formed.
  • the first resin material forming the outer frame member is different from the second resin material forming the inner frame member.
  • the first resin material having environmental performance can be used to suppress the influence from the outside world and ensure durability, and also to hold the second lens group.
  • the frame member by using the second resin material having low hygroscopicity, it is possible to suppress the backlash of each lens constituting the second lens group by suppressing the deformation of the inner frame member.
  • the first resin material is preferably superior in environmental performance compared to the second resin material.
  • environmental performance means at least one of chemical resistance, high strength, and heat resistance.
  • the outer frame member and the inner frame member are connected by screw connection!
  • the first lens is made of glass, it is superior in environmental performance compared to a resin lens, so that the performance can be maintained even when exposed to the outside world.
  • the linear expansion coefficient of the material of the lens constituting the second lens group is equal to the linear expansion coefficient of the second resin material. ! /
  • FIG. 1 is a block diagram of an imaging apparatus 100.
  • FIG. 2 is a cross-sectional view of the optical system 101.
  • FIG. 3 is a cross-sectional view of the optical system 101 which is a force in a modified example.
  • FIG. 1 is a block diagram of the imaging apparatus 100.
  • the imaging apparatus 100 can be mounted on a vehicle in a form in which at least the optical system 101 is exposed to the outside.
  • an imaging apparatus 100 includes an optical system 101, a solid-state imaging device 102, an A / D conversion unit 103, a control unit 104, a timing generation unit 106, and an imaging device driving unit. 107, an image memory 108, an image processing unit 109, an image compression unit 110, an image recording unit 111, a display unit 112 that is a display in a passenger compartment, and an operation unit 113.
  • the optical system 101 has a function of forming a subject image on the imaging surface of the solid-state imaging device 102.
  • the solid-state imaging device 102 is an imaging device such as a CCD or CMOS, and photoelectrically converts incident light for each of R, G, and B and outputs an analog signal thereof.
  • the A / D conversion unit 103 converts an analog signal into digital image data.
  • the control unit 104 controls each unit of the imaging apparatus 100.
  • the control unit 104 includes a CPU (Central Processing Unit), a RAM (Random Access Memory), and a ROM (Read Only Memory).
  • the control unit 104 cooperates with various programs read from the ROM and expanded in the RAM, and the CPU. Perform various processes.
  • Timing generation section 106 outputs a timing signal for analog signal output.
  • the imaging element driving unit 107 performs scanning driving control of the solid-state imaging element 102.
  • the image memory 108 stores image data so as to be readable and writable.
  • the image processing unit 109 performs various image processes on the image data.
  • the image compression unit 110 compresses captured image data by a compression method such as JPEG (Joint Photographic Experts Group).
  • the image recording unit 111 records image data on a recording medium such as a hard disk or a memory card set in a slot (not shown).
  • the display unit 112 is a color liquid crystal panel or the like, and can display image data after shooting, a through image before shooting, various operation screens, and the like.
  • the operation unit 113 includes various operation keys for setting values, and outputs information input by the driver to the control unit 104.
  • the operation of the imaging apparatus 100 will be described.
  • the case where the subject on the rear side of the vehicle is monitored (through image display) will be described.
  • the solid-state imaging device 102 is The subject image on the rear side of the vehicle, which is scanned and driven by the timing generation unit 106 and the image sensor driving unit 107 and formed on the light receiving surface of the solid-state image sensor 102 via the optical system 101, is photoelectrically converted, and this output is output.
  • An analog signal is output for one screen at regular intervals.
  • the analog signal is appropriately gain-adjusted for each RGB primary color component, and then converted into digital data by the A / D conversion unit 103.
  • the digital data is subjected to color process processing including pixel interpolation processing and ⁇ correction processing by the image processing unit 109, and a digital luminance signal ⁇ and color difference signals Cb, Cr (image data) are generated to generate an image.
  • the signal is stored in the memory 108, and the signal is periodically read out to generate the video signal.
  • the video signal is output to the display unit 112 and can be visually recognized by the driver.
  • This monitoring unit 112 functions as an electronic viewfinder in monitoring, and displays captured images in real time.
  • Still image data is acquired by the driver operating the button of the operation unit 113 or at the command of the in-vehicle computer at the timing at which still image shooting is desired. You can also In response to this, one frame of image data stored in the image memory 108 is read out and compressed by the image compression unit 110. The compressed image data is recorded on a recording medium by the image recording unit 111.
  • FIG. 2 is a cross-sectional view showing an example of the optical system 101 according to the present embodiment, and the lower half is omitted.
  • the optical system 101 includes a lens unit LS and a lens barrel 10.
  • the lens unit LS is a force that is arranged in the order of the negative first lens Ll, negative second lens L2, diaphragm S, positive third lens L3 from the subject side (left side in Fig. 2). it can.
  • a wide-angle lens having a focal length of 38 mm or less in terms of 35 mm film.
  • the lens barrel 10 includes a hollow cylindrical outer frame member 11 and an inner frame member 12.
  • the cylindrical outer frame member 11 is fixed to the inner peripheral step portion 11a on the subject side by caulking and fixing the flange portion of the first lens L1 closest to the subject side while being positioned in the optical axis direction and the optical axis orthogonal direction (adhesion) But good).
  • the first lens L1 is made of glass.
  • the outer frame member 11 has an inner peripheral guide portion ib and a female screw portion 11c having a larger diameter than the inner peripheral guide portion ib on the inner periphery thereof.
  • the first resin material forming the outer frame member 11 is environmental performance PPA (polyphthalamide), which is a “crystalline plastic” with excellent chemical resistance, high strength, and heat resistance, is used.
  • the first lens L1 corresponds to the first lens group.
  • the cylindrical inner frame member 12 includes a first inner peripheral step portion 12a on the subject side and a second inner peripheral step portion 12b on the imaging element side having a smaller diameter.
  • the flange portion of the third lens L3 inserted from the subject side is first clamped and fixed (it may be glued) in the state where it abuts against the second inner peripheral step portion 12b, and then the first inner portion from the subject side. Insert the outer periphery of the stop S into the circumferential step 12a and abut it, then abut the flange of the second lens L2 from above and fix it by crimping (adhesion may be used).
  • the second lens L2 and the third lens L3 are positioned relative to the inner frame member 12 in the optical axis direction and the optical axis orthogonal direction.
  • the second resin material forming the inner frame member 12 is made of PC (polycarbonate) having low hygroscopicity / “non-crystalline (or non-crystalline) plastic”. Yes.
  • the second lens L2 and the third lens L3 correspond to the second lens group.
  • the inner frame member 12 has an outer peripheral guide portion 12c that engages with the inner peripheral guide portion l ib of the outer frame member 11, and a male screw portion 12d that is screwed into the female screw portion 11c.
  • the outer frame member 11 and the inner frame member 12 are positioned in the direction perpendicular to the optical axis.
  • the screwing amount of the female screw portion 11c and the male screw portion 12d the distance between the first lens L1 and the second lens L2 is adjusted, and the light receiving surface of the solid-state imaging element 102 is in focus. Images can be formed.
  • the outer frame member 11 is a PPA excellent in environmental performance with respect to the PC, it is exposed to the sun's ultraviolet rays, rainfall or snowfall, and a snow melting agent while being exposed outside the vehicle. Even when exposed to the like, the internal lens portion can be protected for a long period of time.
  • the first lens L1 located closest to the subject is made of glass, there is an advantage that it is excellent in weather resistance, which is difficult to be damaged.
  • the inner frame member 12 supporting the second lens L2 and the third lens L3 is inferior to PP A in environmental performance but has low hygroscopicity! Even when used in high humidity! / Situations, it is possible to suppress the deformation of the inner frame member 12 and to suppress the backlash of the second lens L2 and the third lens L3.
  • the second lens L2 and the third lens L3 are the same as the inner frame member 12. Since the linear expansion coefficient is equalized by forming the material, the amount of deformation can be equalized even when the temperature changes, so that the play of the second lens L2 and the third lens L3 can be suppressed.
  • the first resin material forming the frame member 11 is not limited to the above-mentioned PPA, but may be PA-MXD6 (polyamide MXD6) which is “crystalline plastic”.
  • the second resin material forming the inner frame member 12 is not limited to the above-mentioned PC, but “non-crystalline (or non-crystalline)
  • PPA is used for the outer frame member 11
  • PC is used for the inner frame member 12.
  • PPA is used for the outer frame member 11
  • PA—MX D6 for outer frame member 11
  • PC is used for the inner frame member 12
  • PA—MXD6, inner frame member for outer frame member 11 12 can be combined with PAR.
  • outer frame member 11 and the inner frame member 12 can be coupled by a force S coupled by screwing of the threaded portion, not limited to this, but by adhesion, laser welding, or the like.
  • the inner frame member may be movable with respect to the outer frame member to form a focusing lens or a zoom lens.
  • FIG. 3 is a cross-sectional view of the optical system 101 according to the modification, and the lower half is omitted.
  • the lens unit LS includes a negative first lens L1 (corresponding to the first lens group) from the subject side (left side in FIG. 3), a negative second lens L2, a positive third lens L3, Aperture S and negative fourth lens L4 (corresponding to the second lens group) are arranged in this order.
  • the inner frame member 12 forms a first inner circumferential step portion 12a, a second inner circumferential step portion 12b, and a third inner circumferential step portion 12e, which are sequentially reduced in diameter from the subject side.
  • the flange portion of the fourth lens L4 inserted from the subject side is first crimped and fixed (adhesion is possible) in a state where it abuts against the third inner peripheral step portion 12e, and then the second side from the subject side. Insert the outer periphery of the stop S into the inner peripheral step 12b and fix it by abutting and tightening (adhesion may be used), and then insert the second lens L2 into the first inner peripheral step 12a from the subject side and thrust each other Clamp and fix the flange part by caulking (adhesion may be good! /).
  • the second lens L2, the third lens L3, the stop S, and the fourth lens L4 are positioned relative to the inner frame member 12 in the optical axis direction. Since other configurations are the same as those in the above-described embodiment, the description thereof is omitted.
  • the first lens group supported by the outer frame member 11 is composed of one lens
  • the second lens group supported by the inner frame member 12 is composed of a plurality of lenses.
  • the first lens group is composed of multiple lenses
  • the second lens group is composed of a single lens
  • the first lens group and the second lens group are composed of multiple lenses. It may have been made. That is, the outer frame member 11 and the inner frame member 12 only need to support at least one lens.
  • the first lens group supported by the outer frame member 11 is composed of a plurality of lenses, it is preferable that the first lens L1 disposed closest to the subject is made of glass.
  • the present invention has been described above with reference to the embodiments. However, the present invention should not be construed as being limited to the above-described embodiments, and can be modified or improved as appropriate.
  • the lens barrel used in the in-vehicle image pickup apparatus has been described as an example.
  • the present invention is not limited to this, and the power to be used in an image pickup apparatus for a monitoring camera or a mobile phone is not limited. it can.

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

Abstract

Cette invention concerne un cône de caméra à objectif qui peut maintenir de bonnes propriétés optiques tout en maintenant une résistance environnementale. Dans ce cône de caméra à objectif, un élément de cadre externe est formé d'un « plastique cristallin » ayant une excellente résistance environnementale. Ainsi, même lorsqu'une caméra est exposée, par exemple, à la lumière ultraviolette du soleil, à la pluie, à la neige, et à des agents de fonte de la neige, dans un état dans lequel la caméra est exposée à l'extérieur d'un véhicule, une partie d'objectif située dans la caméra peut être protégée pendant une longue période de temps. À l'inverse, un élément de cadre interne est formé d'un « plastique non-cristallin (ou) amorphe » qui possède une résistance environnementale inférieure mais qui possède une absorption moins importante de l'humidité en comparaison avec l'élément de cadre externe. Par conséquent, même lorsque la caméra est utilisée dans des conditions très humides, la déformation de l'élément de cadre interne peut être empêchée afin de supprimer la survenance d'un état de bancalité dans l'objectif. De plus, une construction peut également être adoptée, dans laquelle l'objectif maintenu dans l'élément de cadre interne est formé avec le même matériau que l'élément de cadre interne afin de rendre le coefficient de dilatation linéaire de l'objectif identique à celui de l'élément de cadre interne de façon à supprimer la survenance d'un état de bancalité dans l'objectif.
PCT/JP2007/070610 2006-11-09 2007-10-23 Cône de caméra à objectif WO2008056534A1 (fr)

Priority Applications (1)

Application Number Priority Date Filing Date Title
JP2008543029A JP5146319B2 (ja) 2006-11-09 2007-10-23 レンズ鏡胴

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
JP2006-303986 2006-11-09
JP2006303986 2006-11-09

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WO2008056534A1 true WO2008056534A1 (fr) 2008-05-15

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Cited By (11)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN102023362A (zh) * 2009-09-16 2011-04-20 鸿富锦精密工业（深圳）有限公司 镜头模组及其组装方法
CN102033285A (zh) * 2009-09-29 2011-04-27 鸿富锦精密工业（深圳）有限公司 镜头模组
CN105353489A (zh) * 2015-12-14 2016-02-24 福建福光股份有限公司 一种f35mm机械被动式无热化镜头及其装配方法
CN111142209A (zh) * 2018-11-02 2020-05-12 宁波舜宇车载光学技术有限公司 光学镜头及其组装方法
CN111338160A (zh) * 2018-12-19 2020-06-26 宁波舜宇车载光学技术有限公司 摄像装置及其温度补偿方法
JP2020154121A (ja) * 2019-03-20 2020-09-24 日本電産サンキョー株式会社 レンズユニット
EP3564723A4 (fr) * 2016-12-27 2020-09-30 Mitsubishi Engineering-Plastics Corporation Moulage et procédé de fabrication d'un moulage
JP2021005019A (ja) * 2019-06-27 2021-01-14 日本電産サンキョー株式会社 レンズユニット
CN114338972A (zh) * 2020-09-24 2022-04-12 苹果公司 具有多材料基部结构的相机
WO2023189575A1 (fr) * 2022-03-31 2023-10-05 ニデックインスツルメンツ株式会社 Unité de lentille
WO2023189574A1 (fr) * 2022-03-31 2023-10-05 ニデックインスツルメンツ株式会社 Unité de lentille

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JPH04146404A (ja) * 1990-10-08 1992-05-20 Matsushita Electric Ind Co Ltd レンズ駆動装置
JPH0511157A (ja) * 1991-06-28 1993-01-19 Olympus Optical Co Ltd プラスチツクレンズ鏡筒
JPH11218667A (ja) * 1998-01-30 1999-08-10 Canon Inc 光学鏡筒及びそれを用いた光学機器
JP2002090603A (ja) * 2000-07-10 2002-03-27 Matsushita Electric Ind Co Ltd 防水カメラ
JP2003262777A (ja) * 2002-03-07 2003-09-19 Konica Corp 撮影機器

Cited By (17)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN102023362A (zh) * 2009-09-16 2011-04-20 鸿富锦精密工业（深圳）有限公司 镜头模组及其组装方法
CN102033285A (zh) * 2009-09-29 2011-04-27 鸿富锦精密工业（深圳）有限公司 镜头模组
CN105353489A (zh) * 2015-12-14 2016-02-24 福建福光股份有限公司 一种f35mm机械被动式无热化镜头及其装配方法
US11397372B2 (en) 2016-12-27 2022-07-26 Mitsubishi Engineering-Plastics Corporation Molded article and method for manufacturing molded article
EP3564723A4 (fr) * 2016-12-27 2020-09-30 Mitsubishi Engineering-Plastics Corporation Moulage et procédé de fabrication d'un moulage
CN111142209B (zh) * 2018-11-02 2022-03-29 宁波舜宇车载光学技术有限公司 光学镜头及其组装方法
CN111142209A (zh) * 2018-11-02 2020-05-12 宁波舜宇车载光学技术有限公司 光学镜头及其组装方法
CN111338160A (zh) * 2018-12-19 2020-06-26 宁波舜宇车载光学技术有限公司 摄像装置及其温度补偿方法
CN111338160B (zh) * 2018-12-19 2022-07-08 宁波舜宇车载光学技术有限公司 摄像装置及其温度补偿方法
JP2020154121A (ja) * 2019-03-20 2020-09-24 日本電産サンキョー株式会社 レンズユニット
JP7200018B2 (ja) 2019-03-20 2023-01-06 日本電産サンキョー株式会社 レンズユニット
JP2021005019A (ja) * 2019-06-27 2021-01-14 日本電産サンキョー株式会社 レンズユニット
JP7252074B2 (ja) 2019-06-27 2023-04-04 日本電産サンキョー株式会社 レンズユニット
CN114338972A (zh) * 2020-09-24 2022-04-12 苹果公司 具有多材料基部结构的相机
US11808950B2 (en) 2020-09-24 2023-11-07 Apple Inc. Camera with a multi-material base structure
WO2023189575A1 (fr) * 2022-03-31 2023-10-05 ニデックインスツルメンツ株式会社 Unité de lentille
WO2023189574A1 (fr) * 2022-03-31 2023-10-05 ニデックインスツルメンツ株式会社 Unité de lentille

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JPWO2008056534A1 (ja) 2010-02-25

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