JP2003037758A - Imaging unit - Google Patents
Imaging unitInfo
- Publication number
- JP2003037758A JP2003037758A JP2002001974A JP2002001974A JP2003037758A JP 2003037758 A JP2003037758 A JP 2003037758A JP 2002001974 A JP2002001974 A JP 2002001974A JP 2002001974 A JP2002001974 A JP 2002001974A JP 2003037758 A JP2003037758 A JP 2003037758A
- Authority
- JP
- Japan
- Prior art keywords
- image pickup
- lens
- optical member
- image
- elastic
- Prior art date
- Legal status (The legal status 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 status listed.)
- Granted
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
Landscapes
- Physics & Mathematics (AREA)
- General Physics & Mathematics (AREA)
- Optics & Photonics (AREA)
- Lens Barrels (AREA)
- Studio Devices (AREA)
Abstract
Description
【0001】[0001]
【発明の属する技術分野】本発明は、撮像装置に関し、
特に携帯電話やパソコン(パーソナルコンピューター)
などに設置可能な撮像装置に関する。BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to an image pickup device,
Especially mobile phones and personal computers (personal computers)
The present invention relates to an image pickup device that can be installed in, for example.
【0002】[0002]
【従来の技術】近年においては、CPUの高性能化、画
像処理技術の発達などにより、デジタル画像データを手
軽に取り扱えるようになってきた。特に、携帯電話やP
DAにおいて、画像を表示できるディスプレイを備えた
機種が出回っており、近い将来、無線通信速度の飛躍的
な向上が期待できることから、このような携帯電話やP
DA間で画像データの転送が頻繁に行われることが予想
される。2. Description of the Related Art In recent years, it has become possible to easily handle digital image data due to improvements in CPU performance and image processing technology. Especially mobile phones and P
In DA, a model equipped with a display capable of displaying an image is available on the market, and a dramatic improvement in wireless communication speed can be expected in the near future.
It is expected that image data will be frequently transferred between DAs.
【0003】ところで、現状では、デジタルスチルカメ
ラなどで被写体像を画像データに変換した後に、パソコ
ンなどを介してインターネットを通じて、かかる画像デ
ータを転送することが行われている。しかし、このよう
な態様では、画像データを転送するために、デジタルス
チルカメラとパソコンと双方の機器を有していなくては
ならない。これに対し、携帯電話にCCD型イメージセ
ンサーなどの撮像素子を搭載しようとする試みがある。
このような試みによれば、デジタルスチルカメラやパソ
コンを所有する必要はなく、手軽に持ち歩ける携帯電話
により画像を撮像して相手に送るということが容易に行
えることとなる。By the way, at present, after converting a subject image into image data with a digital still camera or the like, such image data is transferred via the Internet via a personal computer or the like. However, in such a mode, in order to transfer image data, it is necessary to have both a digital still camera and a personal computer. On the other hand, there is an attempt to mount an image pickup device such as a CCD type image sensor on a mobile phone.
According to such an attempt, it is not necessary to own a digital still camera or a personal computer, and it is easy to take an image with a mobile phone that can be easily carried and send it to the other party.
【0004】[0004]
【発明が解決しようとする課題】しかしながら、現状で
は携帯電話より遙かに大型のデジタルスチルカメラの有
する機能を、その携帯電話に持たせるとなると、携帯電
話自体が大きく重くなり、手軽に持ち運べなくなるとい
う問題がある。又、その分製造コストも増大する。However, at present, if the mobile phone has the function of a digital still camera much larger than that of the mobile phone, the mobile phone itself becomes large and heavy, which makes it difficult to carry. There is a problem. In addition, the manufacturing cost increases accordingly.
【0005】特に、デジタルスチルカメラの主要構成要
素である撮影光学系と、撮像素子とをユニット化すると
しても、撮像光学系の合焦位置に、撮像素子の光電変換
部を適切にセットしなくてはならず、その調整をどうす
るかが問題となる。例えば、撮像素子と撮影光学系とを
同一の基板にそれぞれ設置する場合、基板に取り付ける
ために用いる接着剤の厚みのバラツキや、構成部品の寸
法バラツキなどの要因から、撮影光学系の合焦位置に撮
影素子の光電変換部を精度良く組み付けることは困難で
あるといえる。従って、撮影光学系の合焦位置と撮像素
子の光電変換部の組み付け精度を高めるためには、高精
度の組み付け技術が必要になったり、或いは別個に合焦
位置を調整する機構が必要となり、そうすると製造コス
トが上昇するという問題がある。例を挙げて、従来技術
の問題点を指摘する。In particular, even if the photographing optical system, which is a main component of the digital still camera, and the image pickup device are unitized, the photoelectric conversion section of the image pickup device is not properly set at the focus position of the image pickup optical system. The problem is how to make such adjustments. For example, when the image sensor and the photographic optical system are installed on the same substrate, the focus position of the photographic optical system may be affected by factors such as variations in the thickness of the adhesive used to attach the substrate and dimensional variations in the components. It can be said that it is difficult to assemble the photoelectric conversion unit of the image pickup device with high accuracy. Therefore, in order to improve the assembling accuracy of the focusing position of the photographing optical system and the photoelectric conversion unit of the image sensor, a highly accurate assembling technique is required, or a mechanism for separately adjusting the focusing position is required, Then, there is a problem that the manufacturing cost increases. The problems of the prior art will be pointed out by giving examples.
【0006】図6は、従来技術の撮像装置の一例を示す
断面図であるが、ガラスエポキシ製の基板PC上に、撮
像素子110が配置され、上面の端子(不図示)から多
数のワイヤWで、基板PCの裏面に配置された画像処理
IC回路111に接続されている。FIG. 6 is a sectional view showing an example of a conventional image pickup device. An image pickup element 110 is arranged on a glass epoxy substrate PC, and a large number of wires W are connected from terminals (not shown) on the upper surface. Then, it is connected to the image processing IC circuit 111 arranged on the back surface of the substrate PC.
【0007】撮像素子110を覆うようにして、第1筐
体101が配置され、その上に第2筐体102が載置さ
れて、ボルト103で基板に対して共締めされている。
第1筐体101と第2筐体102との間には、赤外線カ
ットフィルタ104が配置されている。A first casing 101 is arranged so as to cover the image pickup device 110, a second casing 102 is placed on the first casing 101, and the second casing 102 is fastened to the substrate with bolts 103.
An infrared cut filter 104 is arranged between the first housing 101 and the second housing 102.
【0008】第2筐体102の上部は円筒状となってお
り、その内面に形成された雌ねじ102aに雄ねじ10
5aを螺合させることで、レンズ106を内包するレン
ズ鏡筒105が、第2筐体102に対し光軸方向の位置
を調整可能に取り付けられている。レンズ鏡筒105
は、上部に絞り部105bを形成している。The upper portion of the second housing 102 is cylindrical, and the internal thread 102a formed on the inner surface of the second housing 102 has a male thread 10a.
By screwing 5a, the lens barrel 105 including the lens 106 is attached to the second housing 102 so that the position thereof in the optical axis direction can be adjusted. Lens barrel 105
Has a narrowed portion 105b formed on the upper side.
【0009】このように従来技術の撮像装置は、多数の
部品からなる比較的大型の装置となっており、従って上
述した製造コストの問題もさることながら、これら部品
の組み付けに手間取ると共に、組み付け時には、レンズ
鏡筒105を回転させつつ撮像素子110とレンズ10
6との相対位置調整を行う必要もある。As described above, the conventional image pickup apparatus is a relatively large-sized apparatus composed of a large number of parts. Therefore, it is troublesome to assemble these parts while avoiding the above-mentioned problem of manufacturing cost. , The image pickup device 110 and the lens 10 while rotating the lens barrel 105.
It is also necessary to adjust the relative position with respect to 6.
【0010】このような問題を解消すべく、レンズに、
レンズの焦点距離位置近傍まで延在させた脚部を設け
て、かかる脚部を撮像素子に直接的に当接させることに
よって撮像装置を構成しようとする試みがある。かかる
試みによれば、レンズの合焦位置に撮像素子の光電変換
部を配置することができ、撮像装置の組み付け時の手間
を大幅に減少させることができる。In order to solve such a problem, the lens is
There is an attempt to provide an image pickup apparatus by providing a leg portion that extends to the vicinity of the focal length position of a lens and directly contacting the leg portion with the image pickup element. According to such an attempt, the photoelectric conversion unit of the image pickup device can be arranged at the focus position of the lens, and the labor at the time of assembling the image pickup apparatus can be greatly reduced.
【0011】しかるに、かかるコンパクトな撮像装置を
搭載した種々の機器においては、振動や誤って落下させ
た際の衝撃などが付与されることが予想される。かかる
場合、レンズの脚部を撮像素子に当接させていると、振
動でレンズがガタついたり、衝撃により撮像素子が破損
する恐れがある。However, it is expected that various devices equipped with such a compact image pickup device will be subject to vibrations or shocks when accidentally dropped. In such a case, when the leg portion of the lens is brought into contact with the image pickup element, the lens may be shaken by vibration, or the image pickup element may be damaged by impact.
【0012】このような問題に対して、レンズを撮像素
子に対してレンズホルダにより所定の圧力を付与しなが
ら当接させ、レンズホルダと基板を接着することにより
固定するということも考えられる(特開平9−2846
17号参照)。かかる技術によれば、レンズと撮像素子
とのがたつきは抑えられるものの、接着剤の厚みや部品
形状の経時変化により前記圧力が減少したような場合、
レンズがガタついてしまう可能性がある。又、衝撃力に
より、前記レンズが前記撮像素子を破損させてしまう恐
れは、依然として残っている。To solve such a problem, it may be considered that the lens is brought into contact with the image pickup element while applying a predetermined pressure by the lens holder, and the lens holder and the substrate are adhered to fix the lens. Kaihei 9-2846
(See No. 17). According to such a technique, rattling between the lens and the image pickup device can be suppressed, but in the case where the pressure is reduced due to a change in the thickness of the adhesive or the shape of parts,
The lens may rattle. Further, there is still a possibility that the lens may damage the image pickup device due to the impact force.
【0013】本発明はこのような問題点に鑑みてなされ
てものであり、安価でありながら、部品点数を削減で
き、小型化が図れ、長期にわたってレンズのがたつきや
外力による損傷を抑制でき、また更に、無調整であって
も精度良く組み付けでき、さらには防塵、防湿の構造を
有し、また信頼性の高い撮像装置を提供することを目的
とする。The present invention has been made in view of the above problems, and it is inexpensive, but the number of parts can be reduced, downsizing can be achieved, and rattling of a lens and damage due to external force can be suppressed for a long period of time. Furthermore, it is an object of the present invention to provide an image pickup apparatus that can be assembled with high precision even without adjustment, has a dustproof and moistureproof structure, and has high reliability.
【0014】[0014]
【課題を解決するための手段】かかる目的を達成すべ
く、第1の本発明の撮像装置は、基板と、光電変換部を
備え、前記基板上に載置された撮像素子と、前記撮像素
子に備えられる前記光電変換部に被写体像を結像させる
レンズ部と、前記レンズ部を支持する脚部とを備えた光
学部材と、弾性手段と、を有し、前記弾性手段の弾性力
により、前記光学部材は前記撮像素子に向かって付勢さ
れていることを特徴とする。In order to achieve such an object, an image pickup apparatus according to a first aspect of the present invention includes a substrate, a photoelectric conversion section, an image pickup element mounted on the substrate, and the image pickup element. An optical member including a lens unit for forming a subject image on the photoelectric conversion unit provided in, and a leg unit supporting the lens unit, and an elastic unit, and by an elastic force of the elastic unit, The optical member is biased toward the image pickup device.
【0015】第2の本発明の撮像装置は、基板と、光電
変換部を備え、前記基板上に載置された撮像素子と、前
記撮像素子に備えられる前記光電変換部に被写体像を結
像させるレンズ部と、前記レンズ部を支持する脚部とを
備えた光学部材と、前記光学部材を支持すると共に、弾
性手段を備えた鏡枠と、を有し、前記弾性手段の弾性力
により、前記光学部材は前記撮像素子に向かって付勢さ
れていることを特徴とする。An image pickup device according to a second aspect of the present invention includes a substrate and a photoelectric conversion unit, and forms an image of a subject on the image pickup device mounted on the substrate and the photoelectric conversion unit provided on the image pickup device. An optical member having a lens portion for allowing the lens portion and a leg portion for supporting the lens portion, and a lens frame having an elastic means for supporting the optical member are provided, and by the elastic force of the elastic means, The optical member is biased toward the image pickup device.
【0016】[0016]
【作用】第1の本発明の撮像装置は、基板と、光電変換
部を備え、前記基板上に載置された撮像素子と、前記撮
像素子に備えられる前記光電変換部に被写体像を結像さ
せるレンズ部と、前記レンズ部を支持する脚部とを備え
た光学部材と、弾性手段と、を有し、前記弾性手段の弾
性力により、前記光学部材は前記撮像素子に向かって付
勢されているので、例えば前記光学部材の脚部を前記撮
像素子の表面に当接して付勢することで、前記光学部材
と前記撮像素子との光軸方向の位置決めを容易にできる
にもかかわらず、経時変化により部品に反りなどの変形
が生じたような場合にも、安定した弾性力で、前記光学
部材を前記撮像素子に対して付勢することができ、それ
により振動が生じた際における前記光学部材のガタつき
を抑えることができ、しかも衝撃が生じた際における前
記撮像素子の破損を抑制することができる。尚、撮像素
子としては、CMOS(ComplementaryM
etal Oxide Semiconductor)
型イメージセンサーが好適であるが、CCD(Char
ged Coupled Device)型イメージセ
ンサーであっても良い。According to the first aspect of the present invention, an image pickup device is provided with a substrate and a photoelectric conversion unit, and an object image is formed on the image pickup device mounted on the substrate and the photoelectric conversion unit provided on the image pickup device. An optical member having a lens portion that allows the lens portion and a leg portion that supports the lens portion, and an elastic member, and the elastic member biases the optical member toward the image sensor. Therefore, for example, by abutting and biasing the leg portion of the optical member against the surface of the image sensor, it is possible to easily position the optical member and the image sensor in the optical axis direction, Even when a component such as a warp or the like is deformed due to a change with time, the optical member can be urged against the image pickup element by a stable elastic force, and the vibration is generated when the vibration occurs. By suppressing the rattling of optical components , Yet it is possible to suppress the damage of the image pickup device at the time of impact has occurred. In addition, as the image pickup device, a CMOS (ComplementaryM) is used.
etal Oxide Semiconductor)
Type image sensor is suitable, but CCD (Char
The image sensor may be a gaged coupled device type image sensor.
【0017】更に、前記弾性手段の弾性力により、前記
脚部は、5g以上500g以下の荷重で、前記撮像素子
における前記レンズ部に向いた表面に当接していると、
弾性力の適正な管理により前記撮像素子の破損などを抑
制できる。Further, by the elastic force of the elastic means, the leg portion is in contact with the surface of the image pickup element facing the lens portion with a load of 5 g or more and 500 g or less,
By properly managing the elastic force, damage to the image pickup device can be suppressed.
【0018】又、前記基板に固定される鏡枠に取り付け
られ、前記レンズ部より被写体側に配置され、前記弾性
手段を押圧し、少なくとも一部が光を透過可能なカバー
部材を有すれば、前記レンズ部の保護を図ることができ
る。即ち、前記カバー部材のために、前記レンズ部が外
部に対して剥き出しにならず、また外部からの前記カバ
ー部材への衝撃が前記弾性部材に吸収されるので、前記
レンズ部に強い衝撃が加わり、その結果前記撮像素子を
破損するというようなことが抑制される。If a cover member that is attached to a lens frame fixed to the substrate, is arranged closer to the subject than the lens portion, presses the elastic means, and at least a part of which is transparent to light, It is possible to protect the lens portion. That is, since the lens member is not exposed to the outside due to the cover member, and the impact from the outside to the cover member is absorbed by the elastic member, a strong impact is applied to the lens unit. As a result, it is possible to prevent the image sensor from being damaged.
【0019】更に、前記弾性手段は、前記光学部材及び
前記カバー部材と別体で構成されると、前記弾性力の管
理を行う際に、前記弾性手段のみを交換すれば良く、コ
スト低減が図れる。ここで、別体とは個々の独立した部
材で構成され、接着剤等により一体化されておらず、取
り外した際に個々の部品として取り扱える状態であるこ
とをいう。Further, when the elastic means is formed separately from the optical member and the cover member, only the elastic means needs to be replaced when managing the elastic force, and the cost can be reduced. . Here, the term “separate body” means that each member is composed of individual independent members, is not integrated by an adhesive or the like, and can be handled as an individual component when removed.
【0020】又、前記弾性手段はコイルばねであると、
長期間安定して弾性力を発揮できる。If the elastic means is a coil spring,
Can exert elastic force stably for a long period of time.
【0021】更に、前記弾性手段は中央に開口を有する
シート状部材であると、組付けが容易であり、省スペー
ス化の点でも好ましい。Further, if the elastic means is a sheet-like member having an opening at the center, it is easy to assemble and it is preferable in terms of space saving.
【0022】又、前記シート状部材は、遮光性を有する
部材からなり、前記レンズ部のFナンバーを規定する絞
りの機能を兼ねると、別個に絞りを設ける必要がなくな
り、部品点数の削減になるため好ましい。Further, the sheet-like member is made of a light-shielding member, and if it also has a function of a diaphragm for defining the F number of the lens portion, it is not necessary to separately provide a diaphragm, and the number of parts can be reduced. Therefore, it is preferable.
【0023】一方、前記弾性手段が、前記カバー部材と
一体化されていると、部品点数の削減になるため好まし
い。On the other hand, it is preferable that the elastic means is integrated with the cover member because the number of parts can be reduced.
【0024】又、前記弾性手段が、前記光学部材と一体
化されていると、部品点数の削減になるため好ましい。Further, it is preferable that the elastic means is integrated with the optical member because the number of parts can be reduced.
【0025】第2の本発明の撮像装置は、基板と、光電
変換部を備え、前記基板上に載置された撮像素子と、前
記撮像素子に備えられる前記光電変換部に被写体像を結
像させるレンズ部と、前記レンズ部を支持する脚部とを
備えた光学部材と、前記光学部材を支持すると共に、弾
性手段を備えた鏡枠と、を有し、前記弾性手段の弾性力
により、前記光学部材は前記撮像素子に向かって付勢さ
れているので、例えば前記光学部材の脚部を前記撮像素
子の表面に当接して付勢することで、前記光学部材と前
記撮像素子との光軸方向の位置決めを容易にできるにも
かかわらず、経時変化により部品に反りなどの変形が生
じたような場合にも、安定した弾性力で、前記光学部材
を前記撮像素子に対して付勢することができ、それによ
り振動が生じた際における前記光学部材のガタつきを抑
えることができ、しかも衝撃が生じた際における前記撮
像素子の破損を抑制することができる。An image pickup apparatus according to a second aspect of the present invention includes a substrate and a photoelectric conversion unit, and an object image is formed on the image pickup device mounted on the substrate and the photoelectric conversion unit provided on the image pickup device. An optical member having a lens portion for allowing the lens portion and a leg portion for supporting the lens portion, and a lens frame having an elastic means for supporting the optical member are provided, and by the elastic force of the elastic means, Since the optical member is biased toward the image pickup device, for example, the leg portion of the optical member is brought into contact with the surface of the image pickup device and biased so that the light of the optical member and the image pickup device is increased. Despite the ease of axial positioning, the elastic member biases the optical member against the image sensor with a stable elastic force even when a component such as a warp is deformed due to a change over time. When the resulting vibration Definitive wherein it is possible to suppress the rattling of the optical member, yet it is possible to suppress the damage of the image pickup device at the time of impact has occurred.
【0026】更に、前記弾性手段の弾性力により、前記
脚部は、5g以上500g以下の荷重で、前記撮像素子
における前記レンズ部に向いた表面に当接していると、
弾性力の適正な管理により前記撮像素子の破損などを抑
制できる。Further, due to the elastic force of the elastic means, the leg portion is in contact with the surface of the image pickup element facing the lens portion with a load of 5 g or more and 500 g or less,
By properly managing the elastic force, damage to the image pickup device can be suppressed.
【0027】[0027]
【発明の実施の形態】以下、本発明の実施の形態につ
き、図面を参照して説明する。図1は、本実施の形態に
かかる撮像装置の断面図である。図2は、図1の撮像装
置の斜視図である。図3は、光学部材の斜視図であり、
図4は、光学部材の下面図である。図5は、撮像素子の
上面図である。BEST MODE FOR CARRYING OUT THE INVENTION Embodiments of the present invention will be described below with reference to the drawings. FIG. 1 is a sectional view of the image pickup apparatus according to the present embodiment. FIG. 2 is a perspective view of the image pickup apparatus of FIG. FIG. 3 is a perspective view of an optical member,
FIG. 4 is a bottom view of the optical member. FIG. 5 is a top view of the image sensor.
【0028】光学部材1は、プラスチック材料を用い
て、図1に示すようにレンズ部と脚部とが一体成形され
ている。より具体的には、光学部材1は、管状の脚部1
cと、脚部1cの一部としてその下端に形成された4つ
の当接部1dと、脚部1cの上端周囲に形成された段部
1eと、脚部1cの上端を塞ぐ板状の上面部1bと、上
面部1bの中央に形成された凸レンズ部1aとから一体
で形成されている。尚、上面部1bの上面であって、凸
レンズ部1aの周囲には、遮光性のある素材からなり、
凸レンズ部1aのFナンバーを規定する第1の絞りとし
ての開口3aを有する絞り板3が接着等により固定され
ている。The optical member 1 is made of a plastic material, and the lens portion and the leg portion are integrally formed as shown in FIG. More specifically, the optical member 1 has a tubular leg portion 1.
c, four contact portions 1d formed at the lower end of the leg portion 1c as a part thereof, a step portion 1e formed around the upper end of the leg portion 1c, and a plate-like upper surface that closes the upper end of the leg portion 1c. The portion 1b and the convex lens portion 1a formed in the center of the upper surface portion 1b are integrally formed. In addition, on the upper surface of the upper surface portion 1b and around the convex lens portion 1a, a light-shielding material is used.
A diaphragm plate 3 having an opening 3a as a first diaphragm that defines the F number of the convex lens portion 1a is fixed by adhesion or the like.
【0029】光学部材1の外側には、遮光性のある素材
からなる鏡枠4が配置されている。鏡枠4は、図2から
明らかなように、角柱状の下部4aと、円筒状の上部4
bとを設けている。下部4aの下端は、基板PC上に当
接し、接着剤Bにより固着されている。下部4aの上面
は、隔壁4cにより周辺側が覆われており、隔壁4cの
円形内周面には、光学部材1の脚部1cが密着的に嵌合
している。従って、基板PCと鏡枠4とを、例えば自動
組立機に備えられた光学センサ(不図示)などを用い
て、隔壁4cの円形開口部中心と、後述する撮像素子2
bの光電変換部2dの中心を一致させるように位置決め
配置するだけで、後述する撮像素子2bの光電変換部2
dに対してレンズ部1aを、光軸直交方向に精度良く位
置決めすることができる。On the outer side of the optical member 1, a lens frame 4 made of a light-shielding material is arranged. As is apparent from FIG. 2, the lens frame 4 has a prismatic lower portion 4a and a cylindrical upper portion 4a.
b and are provided. The lower end of the lower portion 4a is in contact with the substrate PC and is fixed by the adhesive B. The upper surface of the lower portion 4a is covered with the partition wall 4c on the peripheral side, and the leg portion 1c of the optical member 1 is closely fitted to the circular inner peripheral surface of the partition wall 4c. Therefore, the substrate PC and the lens frame 4 are attached to the center of the circular opening of the partition wall 4c and the image pickup device 2 described later by using, for example, an optical sensor (not shown) provided in the automatic assembly machine.
The photoelectric conversion unit 2b of the image pickup device 2b, which will be described later, can be simply arranged by positioning so that the centers of the photoelectric conversion units 2d of b.
The lens portion 1a can be accurately positioned with respect to d in the direction orthogonal to the optical axis.
【0030】一方、鏡枠4の上部4bの上端には、遮光
板5が接着剤Bにより取り付けられている。遮光板5
は、その中央に第2の絞りとしての開口5aを有してい
る。遮光板5の開口5aの下方には、赤外線吸収特性を
有する素材からなるフィルタ7が、接着剤Bにより取り
付けられている。遮光板5とフィルタ7とでカバー部材
を構成する。On the other hand, a light shielding plate 5 is attached by an adhesive B to the upper end of the upper portion 4b of the lens frame 4. Light shield 5
Has an opening 5a as a second diaphragm in the center thereof. Below the opening 5a of the light shielding plate 5, a filter 7 made of a material having an infrared absorbing property is attached by an adhesive agent B. The light shielding plate 5 and the filter 7 form a cover member.
【0031】図1において、遮光板5と、光学部材1の
段部1eとの間には、コイルばねからなる弾性手段6が
配置され、遮光板5が鏡枠4に取り付けられることで弾
性変形し、その弾性力により、光学部材1を図1中、下
方に向かって押圧している。よって、遮光板5からの力
は、鏡枠4を介して基板PCには伝達されるものの、直
接、撮像素子2bに伝達されることがない。In FIG. 1, an elastic means 6 composed of a coil spring is arranged between the light shield plate 5 and the step portion 1e of the optical member 1, and the light shield plate 5 is elastically deformed by being attached to the lens frame 4. However, the elastic force presses the optical member 1 downward in FIG. Therefore, the force from the light shielding plate 5 is transmitted to the substrate PC via the lens frame 4, but is not directly transmitted to the image pickup element 2b.
【0032】図5において、撮像ユニット2は、CMO
S型イメージセンサーなどの撮像素子2bからなる。矩
形薄板状の撮像素子2bの下面は、基板PCの上面に取
り付けられている。撮像素子2bの上面中央には、画素
が2次元的に配列された光電変換部2dが形成されてお
り、その周囲には、撮像素子2bの内部であって且つ内
側に画像処理回路が構成されている周囲面2aが形成さ
れている。薄い側面に直交するように交差した周囲面2
aの外縁近傍には、多数のパッド2cが配置されてい
る。結線用端子であるパッド2cは、図1に示すごとく
ワイヤWを介して、基板PCに接続されている。ワイヤ
Wは、基板PC上の所定の回路に接続されている。In FIG. 5, the image pickup unit 2 is a CMO.
It is composed of an image sensor 2b such as an S-type image sensor. The lower surface of the rectangular thin plate-shaped image sensor 2b is attached to the upper surface of the substrate PC. A photoelectric conversion unit 2d in which pixels are two-dimensionally arranged is formed in the center of the upper surface of the image sensor 2b, and an image processing circuit is formed inside and inside the image sensor 2b around the photoelectric conversion unit 2d. A surrounding surface 2a is formed. Peripheral surface 2 that intersects perpendicularly to the thin side surface
A large number of pads 2c are arranged near the outer edge of a. The pad 2c, which is a connection terminal, is connected to the substrate PC via the wire W as shown in FIG. The wire W is connected to a predetermined circuit on the substrate PC.
【0033】更に、光学部材1の当接部1dは、図4に
示すごとき形状で、脚部1cの下端から突出し脚部1c
の一部を構成してなる。本実施の形態においては、図5
で点線に示すように、撮像素子2bの周囲面2aにおい
て、パッド2cの内側に、当接部1dのみが当接した状
態で配置されることとなる。従って、面平面度に関して
は、当接部1dの下面のみ所定範囲に維持されれば足り
る。又、脚部1c(当接部1d)は4本であって、光学
部材1の重心はその中央に来るため、光学部材1を単体
で平面に載置したときに、レンズ部1aの光軸が平面に
対して直交するような位置と形状とを有しているといえ
る。従って、鏡枠4の内周面と光学部材1の外周面との
間にスキマがあったとしても、撮像素子2bの周囲面2
aに脚部1cを当接させたときに、撮像素子2bの光電
変換部2dに対して光軸が直交し、よりひずみの少ない
画像を得ることができる。ここで、周囲面2aの裏側
(図1で下面側)には、撮像素子の不図示の回路(信号
処理回路を含む)が設けられているが、当接部1dの当
接により回路の処理には影響が及ばないようになってい
る。Further, the contact portion 1d of the optical member 1 has a shape as shown in FIG. 4 and protrudes from the lower end of the leg portion 1c, and the leg portion 1c.
It constitutes a part of. In the present embodiment, FIG.
As indicated by the dotted line, on the peripheral surface 2a of the image sensor 2b, only the contact portion 1d is arranged inside the pad 2c so as to be in contact. Therefore, regarding the surface flatness, it is sufficient if only the lower surface of the contact portion 1d is maintained within a predetermined range. Further, since there are four leg portions 1c (contact portions 1d) and the center of gravity of the optical member 1 is at the center thereof, when the optical member 1 is placed alone on a plane, the optical axis of the lens portion 1a is Can be said to have a position and a shape that are orthogonal to the plane. Therefore, even if there is a gap between the inner peripheral surface of the lens frame 4 and the outer peripheral surface of the optical member 1, the peripheral surface 2 of the image sensor 2b is
When the leg portion 1c is brought into contact with a, the optical axis is orthogonal to the photoelectric conversion portion 2d of the image sensor 2b, and an image with less distortion can be obtained. Here, a circuit (including a signal processing circuit) (not shown) of the image sensor is provided on the back side of the peripheral surface 2a (the lower surface side in FIG. 1), but the circuit processing is performed by the contact of the contact portion 1d. Is not affected.
【0034】ここで、当接部1dの当接位置を検討する
に、例えば図5に示す光電変換部2dの表面のうち、隅
部2gなどは、有効画素領域を全画素領域よりやや小さ
めにすることで、画像形成に無関係な領域となるので、
そのような場合は光電変換部2d表面内であっても、隅
部2gの領域に当接部1dを当接させても撮像素子2b
の撮像性能に影響を与える恐れは少ないといえる。尚、
周囲面2a又は光電変換部2d表面のいずれの領域に当
接させるにしろ、当接部1dからの荷重は500g以下
であることが好ましい。この荷重を越えると、撮像素子
2bにダメージが付与される恐れがあるからである。但
し、振動などによる画像のブレを考慮すると、当接部1
dからの荷重は、5g以上であることが望ましい。かか
る荷重は、後述するように弾性手段であるコイルばね6
の線径・巻数などを選択することにより、適切に管理す
ることができる。また、5g以上500g以下の何れの
荷重においても、面圧では1000mg/mm2以下で
あることが撮像素子への局所的な極度の負荷による損傷
を防止する上でより好ましい。ここで、面圧とは、光学
部材の脚部(当接部1d)を介して撮像素子に加えられ
る荷重を、その脚部が当接されているレンズ部に向いた
面の面積で割ったものである。Here, in considering the contact position of the contact portion 1d, for example, in the corner portion 2g of the surface of the photoelectric conversion portion 2d shown in FIG. 5, the effective pixel area is set to be slightly smaller than the entire pixel area. By doing so, it becomes an area unrelated to image formation,
In such a case, even if the contact portion 1d is brought into contact with the area of the corner 2g even within the surface of the photoelectric conversion portion 2d, the image pickup device 2b is provided.
It can be said that there is little fear of affecting the image pickup performance of. still,
Whichever region of the peripheral surface 2a or the surface of the photoelectric conversion unit 2d is brought into contact, the load from the contact portion 1d is preferably 500 g or less. This is because if the load is exceeded, the image sensor 2b may be damaged. However, considering the blurring of the image due to vibration, etc., the contact portion 1
The load from d is preferably 5 g or more. The load is applied to the coil spring 6 which is an elastic means as described later.
Appropriate management can be achieved by selecting the wire diameter, number of turns, and so on. Further, in any load of 5 g or more and 500 g or less, it is more preferable that the surface pressure is 1000 mg / mm 2 or less in order to prevent damage to the image pickup element due to a local extreme load. Here, the surface pressure is obtained by dividing the load applied to the image pickup element through the leg portion (contact portion 1d) of the optical member by the area of the surface facing the lens portion with which the leg portion is in contact. It is a thing.
【0035】本実施の形態によれば、当接部1dが、撮
像素子2bの周囲面2aに当接した状態で、光学部材1
の段部1eの下面と、鏡枠4の下部4aの隔壁4cとの
間には、スキマΔが形成されるようになっているので、
レンズ部1aと撮像素子2bの光電変換部2dとの距離
L(即ち光軸方向の位置決め)は、脚部1cの長さによ
り精度良く設定されるようになっている。本実施の形態
では、4ヶ所の当接部を設けてはいるが、1ヶ所乃至3
ヶ所でもよい。また、パッド2cとの干渉が回避できる
のであれば、光学部材1の円筒状の脚部1cに沿った、
輪帯状の当接部であっても良い。According to the present embodiment, the optical member 1 is contacted with the contact portion 1d in contact with the peripheral surface 2a of the image pickup element 2b.
Since a gap Δ is formed between the lower surface of the step portion 1e and the partition wall 4c of the lower portion 4a of the lens frame 4,
The distance L (that is, the positioning in the optical axis direction) between the lens portion 1a and the photoelectric conversion portion 2d of the image pickup element 2b is set accurately by the length of the leg portion 1c. Although four contact portions are provided in this embodiment, one to three contact portions are provided.
It can be in several places. Further, if interference with the pad 2c can be avoided, along the cylindrical leg portion 1c of the optical member 1,
It may be a ring-shaped contact portion.
【0036】又、光学部材1をプラスチック材料で構成
しているので、温度変化時のレンズ部の屈折率変化に基
づく合焦位置のずれを低減することも可能である。すな
わち、プラスチックレンズは温度が上昇するにつれて、
レンズの屈折率が下がり、合焦位置がレンズから離れる
方向に変化する。一方、脚部1cは温度上昇により伸び
るため、合焦位置ずれの低減効果がある。尚、本実施の
形態の光学部材1は、比重が比較的軽いプラスチック材
料からなるので、同一体積でもガラスに比べて軽量であ
り、かつ衝撃吸収特性に優れるため、撮像装置を誤って
落としたような場合でも、光学部材1およびそれが当接
される撮像素子2bの破損を極力抑制できるという利点
がある。Further, since the optical member 1 is made of a plastic material, it is possible to reduce the shift of the focusing position due to the change in the refractive index of the lens portion when the temperature changes. That is, as the plastic lens rises in temperature,
The refractive index of the lens decreases, and the focus position changes in the direction away from the lens. On the other hand, since the leg portion 1c extends due to the temperature rise, it has the effect of reducing the focus position shift. Since the optical member 1 of the present embodiment is made of a plastic material having a relatively light specific gravity, it is lighter in weight than glass even in the same volume and has excellent shock absorption characteristics. Even in such a case, there is an advantage that damage to the optical member 1 and the image pickup device 2b with which the optical member 1 is brought into contact can be suppressed as much as possible.
【0037】又、図5に示すように、光学部材1が鏡枠
4の中で任意に回転できる構造であると、当接部1dが
パッド2cと干渉してしまうので、回転が規制されなが
ら組付けられる構造(例えば回転ストッパを鏡枠4に設
けるなど)が好ましい。Further, as shown in FIG. 5, when the optical member 1 has a structure capable of rotating freely within the lens frame 4, the contact portion 1d interferes with the pad 2c, so that the rotation is restricted. A structure to be assembled (for example, a rotation stopper is provided on the lens frame 4) is preferable.
【0038】本実施の形態の動作について説明する。光
学部材1のレンズ部1aは、被写体像を、撮像素子2b
の光電変換部2dに結像する。撮像素子2bは、受光し
た光の量に応じた電気的信号を画像信号等に変換しパッ
ド2cおよびワイヤWを介して出力できるようになって
いる。The operation of this embodiment will be described. The lens portion 1a of the optical member 1 captures a subject image with the image sensor 2b.
An image is formed on the photoelectric conversion unit 2d. The image pickup device 2b is adapted to convert an electric signal corresponding to the amount of received light into an image signal or the like and output it via the pad 2c and the wire W.
【0039】更に、本実施の形態においては、光学部材
1を基板PC上に取り付けるのではなく、撮像素子2b
の周囲面2a上に取り付けているので、光学部材1の脚
部1c(当接部1dを含む)の寸法精度、即ち、上述し
た距離Lの精度を管理することで、組み付け時に、レン
ズ部1aの合焦位置に関する調整を不要とできる。本発
明の実施の形態にかかる撮像装置は、被写体距離に応じ
たピント調整機構が無いため、撮像装置のレンズとして
は、遠距離被写体から近距離被写体までピントが合う、
パンフォーカスレンズである必要がある。従って、過焦
点距離U≒f2/(F×2P)(ただし、f:レンズの
焦点距離、F:レンズのFナンバー、P:撮像素子の画
素ピッチ)における、レンズ部1aの像点位置と、撮像
素子2bの光電変換部2dとの光軸方向の位置を一致さ
せることにより、幾何光学的には、無限遠方からU/2
の距離の物体にピントが合っているとみなせる状態とな
る。例えば、f=3.2mm、F=2.8、P=0.0
056mmの場合、基準被写体距離として、過焦点距離
U≒f2/(F×2P)=0.33mにおけるレンズ部
1aの像点位置と、撮像素子2bの光電変換部2dとの
光軸方向の位置を一致させるように、上述の距離Lを設
定すれば、無限遠方から約0.17mの距離までピント
が合っている状態になる。また、必ずしも過焦点距離を
基準被写体距離とする必要は無く、例えばより遠方の画
質に重点を置きたい場合は、基準被写体距離を過焦点距
離より遠方に設定すればよい(具体的には上述の距離L
を若干短めにすればよい。)。ここで、距離Lの精度で
あるが、パンフォーカスレンズとして合焦位置の調整を
不要とするためには、撮像装置2bの光電変換部2d
と、レンズ部1aの基準被写体距離における像点の光軸
方向のズレを、空気換算長で±0.5×(F×2P)
(F:撮影レンズのFナンバー、P:撮像素子の画素ピ
ッチ)程度に抑える必要がある。また、望ましくは±
0.25×(F×2P)程度に抑えるのがよい。このズ
レが大きいと、無限遠方や至近距離における画質が劣化
してしまい好ましくない。Further, in this embodiment, the optical member 1 is not mounted on the substrate PC, but the image pickup device 2b.
Since it is mounted on the peripheral surface 2a of the optical member 1, by controlling the dimensional accuracy of the leg portion 1c (including the contact portion 1d) of the optical member 1, that is, the accuracy of the distance L described above, the lens portion 1a can be assembled. It is possible to eliminate the need for adjusting the focus position of. Since the image pickup apparatus according to the embodiment of the present invention does not have a focus adjustment mechanism according to the subject distance, the lens of the image pickup apparatus is focused from a long-distance subject to a short-distance subject.
Must be a pan focus lens. Therefore, the image point position of the lens unit 1a at the hyperfocal length U≈f 2 / (F × 2P) (where f is the focal length of the lens, F is the F number of the lens, and P is the pixel pitch of the image sensor). By matching the position in the optical axis direction with the photoelectric conversion unit 2d of the image pickup device 2b, geometrically optics can be performed at a distance of U / 2 from infinity.
The object at a distance of can be regarded as being in focus. For example, f = 3.2 mm, F = 2.8, P = 0.0
For 056Mm, as a reference object distance, the image point position of the lens portion 1a in the hyperfocal distance U ≒ f 2 /(F×2P)=0.33m, the optical axis direction of the photoelectric conversion unit 2d of the image pickup element 2b If the above-mentioned distance L is set so that the positions coincide with each other, the state is in focus from infinity to a distance of about 0.17 m. Further, it is not always necessary to set the hyperfocal length as the reference subject distance. For example, when it is desired to focus on the image quality at a longer distance, the reference subject distance may be set farther than the hyperfocal length (specifically, the above-mentioned Distance L
Should be slightly shorter. ). Here, in terms of the accuracy of the distance L, in order to eliminate the need for adjusting the in-focus position as the pan focus lens, the photoelectric conversion unit 2d of the imaging device 2b is used.
And the deviation in the optical axis direction of the image point at the reference object distance of the lens unit 1a is ± 0.5 × (F × 2P) in air conversion length.
(F: F number of taking lens, P: pixel pitch of image sensor) need to be suppressed. Also, preferably ±
It is preferable to suppress it to about 0.25 × (F × 2P). If this deviation is large, the image quality at infinity or at a close range is deteriorated, which is not preferable.
【0040】又、本実施の形態によれば、光学部材1の
脚部1cの当接部1dが、撮像素子2bの周囲面2aに
当接することで、レンズ部1aと撮像素子2bの光電変
換部2dとの光軸方向の位置決めを行うことができる。
又、鏡枠4が、基板PCに撮像素子2bの光電変換部2
dを位置決め基準にして設置されることで、レンズ部1
aと撮像素子2bの光電変換部2dとの光軸直交方向の
位置決めが行われるので、低コストでありながら高い位
置決め精度を達成できることとなる。Further, according to the present embodiment, the contact portion 1d of the leg portion 1c of the optical member 1 abuts on the peripheral surface 2a of the image pickup element 2b, so that the photoelectric conversion of the lens portion 1a and the image pickup element 2b is performed. Positioning with the portion 2d in the optical axis direction can be performed.
Further, the lens frame 4 is provided on the substrate PC on the photoelectric conversion unit 2 of the image pickup device 2b.
The lens unit 1 is installed by using d as a positioning reference.
Since the positioning of a and the photoelectric conversion unit 2d of the image pickup device 2b is performed in the direction orthogonal to the optical axis, it is possible to achieve high positioning accuracy at low cost.
【0041】特に、撮像素子2bの周囲面2aに、撮像
素子2bと基板PCとを接続するためのパッド2c及び
ワイヤWが形成されているような場合、脚部1cの当接
部1dが、パッド2cよりも光電変換部2d側において
周囲面2aに当接するように構成すれば、撮像素子2b
をコンパクトな構成に維持しつつも、当接部1dの当接
面積を大きく確保でき、それにより光学部材1を安定化
させると共に、当接面の面圧を低く抑えることができる
ため、撮像素子2bの保護を図りながらも、パッド2c
やワイヤWとの干渉が抑制され、しかも高精度の位置決
めが達成されることとなる。尚、鏡枠4が基板PCに接
着されており、他の2ヶ所の接着部とあわせて、撮像装
置の外部に対して、異物が侵入しないよう密封された状
態に維持されるため、撮像素子2bの光電変換部2dに
対する異物の悪影響を排除することができる。これらに
用いる接着剤は、防湿性を有するのが好ましい。これに
より、湿気の侵入による撮像素子やパッドの表面劣化を
防ぐことができる。Particularly, when the pad 2c and the wire W for connecting the image pickup device 2b and the substrate PC are formed on the peripheral surface 2a of the image pickup device 2b, the contact portion 1d of the leg portion 1c is If it is configured so as to contact the peripheral surface 2a on the photoelectric conversion portion 2d side of the pad 2c, the image pickup device 2b
While maintaining a compact structure, a large contact area of the contact portion 1d can be secured, thereby stabilizing the optical member 1 and suppressing the surface pressure of the contact surface to a low level. Pad 2c while protecting 2b
The interference with the wire W and the wire W is suppressed, and highly accurate positioning is achieved. It should be noted that the lens frame 4 is adhered to the substrate PC and, together with the other two adhering portions, is kept in a sealed state so that foreign matter does not enter the outside of the image pickup apparatus. The adverse effect of foreign matter on the photoelectric conversion unit 2d of 2b can be eliminated. The adhesive used for these preferably has moisture resistance. As a result, it is possible to prevent surface deterioration of the image pickup device and the pad due to invasion of moisture.
【0042】更に、光学部材1の段部1eを、所定の弾
性力で光軸方向に押圧する弾性手段6を設けているの
で、かかる弾性手段6の弾性力を用いて、鏡枠4に対し
て光軸方向に沿って、脚部1c(当接部1d)を撮像素
子2bの周囲面2aに適切な当接力(上述した5g以上
500g以下の荷重に相当する力)で押しつけることが
でき、従って光学部材1と撮像素子2bとの光軸方向の
位置決めが容易であるにもかかわらず、経時変化により
部品に反りなどの変形が生じたような場合にも、安定し
た弾性力で、光学部材1を撮像素子2bに対して付勢す
ることができ、それにより振動が生じた際における光学
部材1のガタつきを抑えることができ、しかも衝撃が生
じた際に、内側に回路が配置された撮像素子2bの周囲
面2aに過大なストレスを生じさせることがない。ま
た、鏡枠4の光軸方向に衝撃力などの大きな力が加わっ
た場合でも、その力は鏡枠4を介して基板PCには伝達
されるが、直接撮像素子2bに伝達されることはなく、
撮像素子2bの保護という観点から好ましい。尚、弾性
手段6としては、ウレタンやスポンジなども考えられる
が、長期間安定した弾性力を発揮できる金属製のばねな
どが好ましい。Further, since the elastic means 6 for pressing the step portion 1e of the optical member 1 in the optical axis direction with a predetermined elastic force is provided, the elastic force of the elastic means 6 is used to the lens frame 4. The leg portion 1c (contact portion 1d) can be pressed against the peripheral surface 2a of the image sensor 2b with an appropriate contact force (a force corresponding to the load of 5 g or more and 500 g or less described above) along the optical axis direction. Therefore, although the optical member 1 and the image pickup device 2b can be easily positioned in the optical axis direction, even if the components such as warp are deformed due to a change with time, the optical member 1 has a stable elastic force. 1 can be urged against the image pickup device 2b, thereby suppressing the rattling of the optical member 1 when vibration occurs, and further, when a shock occurs, the circuit is arranged inside. Excessive strike on the peripheral surface 2a of the image sensor 2b It is not possible to generate a scan. Further, even when a large force such as an impact force is applied in the optical axis direction of the lens frame 4, the force is transmitted to the substrate PC via the lens frame 4, but is not directly transmitted to the image sensor 2b. Without
It is preferable from the viewpoint of protection of the image sensor 2b. The elastic means 6 may be urethane or sponge, but is preferably a metal spring or the like that can exhibit a stable elastic force for a long period of time.
【0043】又、遮光板5とフィルタ7とで構成するカ
バー部材を、レンズ部1aより被写体側に配置している
ので、レンズ部1aを剥き出しにすることなく、その保
護が図れると共に、レンズ面への異物の付着防止も図れ
る。更に、フィルタ7が、赤外線吸収特性を有する材質
から形成されているので、別個に赤外線カットフィルタ
を設ける必要がなくなり、部品点数を削減できるため好
ましい。フィルタ7に赤外線カット特性を付与する代わ
りに、光学部材1自体を赤外線吸収特性のある素材から
形成したり、レンズ1aの表面に、赤外線カット特性を
有する皮膜をコーティングしてもよい。Further, since the cover member composed of the light shielding plate 5 and the filter 7 is arranged closer to the subject side than the lens portion 1a, the lens portion 1a can be protected without being exposed and the lens surface can be protected. It is possible to prevent foreign matter from adhering to the surface. Furthermore, since the filter 7 is formed of a material having an infrared absorption characteristic, it is not necessary to separately provide an infrared cut filter, and the number of parts can be reduced, which is preferable. Instead of providing the filter 7 with the infrared cut property, the optical member 1 itself may be formed of a material having the infrared absorption property, or the surface of the lens 1a may be coated with a film having the infrared cut property.
【0044】更に、組み付け時において、遮光板5を鏡
枠4から取り外した状態で、光学部材1を、鏡枠4に対
して被写体側より挿入することができ、その後、遮光板
5を鏡枠4に組み付けることができる。このような構成
により、光学部材1の組み付け性が向上し、自動組立な
どを容易に行うことができる。この際に、鏡枠4の下部
4aいずれかに空気逃げの孔を形成しておくと、鏡枠4
と光学部材1とのスキマがわずかであっても、容易に組
み付けを行うことができる。但し、かかる空気逃げの孔
は、組み付け後に充填剤などで封止することによって、
外部からの異物の侵入や、湿気による撮像素子およびパ
ッドの表面劣化などを抑制することが好ましい。また、
かかる場合の充填剤は、光漏れを抑制するように遮光性
のあるものが好ましい。尚、基板PCに鏡枠4を接着し
た後に、光学部材1を挿入しても良く、或いは光学部材
1を鏡枠4に取り付けた後に、そのユニット毎基板PC
に接着するようにしても良く、それにより工程の自由度
が確保される。後者の組付手順とする場合は、鏡枠4の
隔壁4cは光学部材1の抜け落ち防止の機能をかねるこ
とができる。Further, at the time of assembly, the optical member 1 can be inserted into the lens frame 4 from the subject side with the light shield plate 5 removed from the lens frame 4, and then the light shield plate 5 is attached. 4 can be assembled. With such a configuration, the assembling property of the optical member 1 is improved, and automatic assembly or the like can be easily performed. At this time, if an air escape hole is formed in any of the lower portions 4a of the lens frame 4, the lens frame 4
Even if there is a slight gap between the optical member 1 and the optical member 1, the assembly can be easily performed. However, such air escape holes can be sealed with a filler after assembly,
It is preferable to prevent foreign matter from entering from the outside and surface deterioration of the image sensor and the pad due to moisture. Also,
In such a case, the filler preferably has a light shielding property so as to suppress light leakage. It should be noted that the optical member 1 may be inserted after the lens frame 4 is adhered to the substrate PC, or after the optical member 1 is attached to the lens frame 4, the unit-by-unit substrate PC
It may be adhered to the base material, which ensures process flexibility. In the case of the latter assembling procedure, the partition wall 4c of the lens frame 4 can also have a function of preventing the optical member 1 from slipping off.
【0045】光学部材1の脚部1cが、撮像素子2bの
光電変換部2dの近くに配置されているため、結像に寄
与しない光束が脚部1cに反射し、光電変換部2dに入
射することで、ゴーストやフレアが生じる原因となるこ
とが懸念される。これを防止するには、レンズ部1aの
Fナンバーを規定する第1の絞り(開口3a)の被写体
側に、周辺光束を規制する第2の絞り(開口5a)を配
置し、不要光の入射を低減させるのが効果的である。な
お、撮像素子2bの光電変換部2dの短辺・長辺、対角
方向で画角が異なるため、第2の絞りの開口5aを矩形
とすることで、より一層の効果が得られる。更に、本実
施の形態では、遮光板5の開口5aにこの機能を持たせ
ているが、フィルタ7の被写体側に、遮光性を有する被
膜を必要な開口部以外にコーティングもしくは塗布する
ことで絞りを形成してもよい。又、同様な理由により、
脚部1cの少なくとも一部に内面反射防止処理を施すの
が好ましい。内面反射防止処理とは、例えば微小な凹凸
を設けた面を形成し、結像に寄与しない光束を散乱させ
るようにすること、反射防止コーティングまたは低反射
特性を有する塗料を塗布することを含む。Since the leg portion 1c of the optical member 1 is arranged near the photoelectric conversion portion 2d of the image pickup device 2b, a light beam which does not contribute to image formation is reflected by the leg portion 1c and is incident on the photoelectric conversion portion 2d. This may cause ghosts and flares. In order to prevent this, a second diaphragm (aperture 5a) that regulates peripheral light flux is arranged on the object side of the first diaphragm (aperture 3a) that defines the F number of the lens unit 1a, and unwanted light is incident. Is effective. Since the angle of view differs depending on the short side / long side of the photoelectric conversion unit 2d of the image pickup device 2b and the diagonal direction, a further effect can be obtained by making the opening 5a of the second diaphragm rectangular. Further, in the present embodiment, the opening 5a of the light shielding plate 5 is provided with this function. However, the subject side of the filter 7 is coated or coated with a light shielding film at a portion other than the required opening portion to reduce the aperture. May be formed. Also, for the same reason,
It is preferable that at least a part of the leg portion 1c be subjected to an inner surface antireflection treatment. The inner surface antireflection treatment includes, for example, forming a surface provided with minute unevenness so as to scatter a light flux that does not contribute to image formation, and applying an antireflection coating or a paint having a low reflection property.
【0046】又、開口3aを備えた絞り板3をレンズ部
1aの入射面側に設けているので、撮像素子2bの受光
面2dに入射する光束を、垂直に近い角度で入射させ、
すなわちテレセントリックに近いものとすることがで
き、それにより高画質な画像を得ることができる。更
に、レンズ部1aの形状は、像側に強い曲率の面を向け
た正レンズの形状とすることで、第1の絞り(開口3
a)とレンズ部1aの主点との間隔が大きくとれ、より
テレセントリックに近い望ましい構成となる。本実施の
形態では、レンズ部1aを像側に凸面を向けた正のメニ
スカス形状としている。また、より高画質な画像を得る
ためには、後述する第3の実施の形態のごとく、レンズ
部を複数枚のレンズで構成するのが好ましい。Further, since the diaphragm plate 3 having the opening 3a is provided on the incident surface side of the lens portion 1a, the light beam incident on the light receiving surface 2d of the image pickup device 2b is made incident at an angle close to vertical.
That is, it can be close to telecentric, whereby a high quality image can be obtained. Further, the shape of the lens portion 1a is the shape of a positive lens with a surface having a strong curvature facing the image side, whereby the first diaphragm (opening 3
The distance between a) and the principal point of the lens portion 1a can be widened, and a desirable configuration closer to telecentricity can be obtained. In this embodiment, the lens portion 1a has a positive meniscus shape with the convex surface facing the image side. Further, in order to obtain a higher quality image, it is preferable that the lens portion is composed of a plurality of lenses as in the third embodiment described later.
【0047】図7は、弾性手段の変形例を含む撮像装置
の断面図であり、図8は、光学部材と弾性手段とを分解
した状態で示す斜視図である。図7の弾性手段16は、
遮光性を有する素材からなり、図1の絞り板3の代わり
に絞り機能を発揮するようになっている。より具体的に
説明すると、図8から明らかなように、樹脂製の弾性手
段16は、中央に開口(絞り)16aを有する略円盤状
のシート状部材であって、その円周から等間隔に半径方
向外方に向かって4つの突起部16bが突出している。
一方、光学部材の頂部に形成されたリング部11fは、
突起部16bに対応して、切欠11gを形成している。
切欠11gに突起部16bを係合させることで、弾性手
段16は、リング部11f内に嵌合的に取り付けられる
ようになっている。更に、遮光板15を取り付ける際
に、その下面に形成された突起15cで、各突起部16
bを上方から押圧すると、突起部16bが弾性変形し、
光学部材11を所定の弾性力で撮像素子2bの周囲面2
aに対して付勢するようになっている。その他の構成に
関しては、図1に示す実施の形態と同様であるので、説
明を省略する。FIG. 7 is a sectional view of an image pickup apparatus including a modification of the elastic means, and FIG. 8 is a perspective view showing the optical member and the elastic means in a disassembled state. The elastic means 16 of FIG.
It is made of a light-shielding material and has a diaphragm function instead of the diaphragm plate 3 shown in FIG. More specifically, as apparent from FIG. 8, the elastic means 16 made of resin is a substantially disk-shaped sheet-like member having an opening (aperture) 16a in the center, and is arranged at equal intervals from the circumference. Four protrusions 16b project outward in the radial direction.
On the other hand, the ring portion 11f formed on the top of the optical member is
A notch 11g is formed corresponding to the protrusion 16b.
By engaging the protrusion 16b with the notch 11g, the elastic means 16 is fitted in the ring portion 11f in a fitting manner. Furthermore, when the light shield plate 15 is attached, each protrusion 16 is formed by the protrusion 15c formed on the lower surface thereof.
When b is pressed from above, the protrusion 16b elastically deforms,
The optical member 11 is applied to the peripheral surface 2 of the image sensor 2b with a predetermined elastic force.
It is designed to urge against a. The other configurations are similar to those of the embodiment shown in FIG.
【0048】図9は、第2の実施の形態にかかる撮像装
置を示す図である。第2の実施の形態においては、上述
した実施の形態に対して、絞り板及び遮光板の構成を変
更した点のみが異なるため、その他の同様な構成に関し
ては、同一符号を付して説明を省略する。FIG. 9 is a diagram showing an image pickup apparatus according to the second embodiment. The second embodiment is different from the above-described embodiment only in that the configurations of the diaphragm plate and the light shielding plate are changed, and therefore, the same reference numerals are given to the other similar configurations and the description will be given. Omit it.
【0049】図9において、鏡枠4の上部4bの上端に
は、薄い遮光シート8を上面に貼り付けた保持部材5’
が、接着剤Bにより取り付けられている。遮光性のある
素材からなる保持部材5’の中央の開口5a’内には、
赤外線吸収特性を有する素材からなるフィルタ7’が嵌
合配置されている。保持部材5’の開口5a’の上縁に
は、テーパ面5b’が形成されており、ここに接着剤B
を付着させることによって、保持部材5’とフィルタ
7’との接合を行うことができる。更に、保持部材5’
は、開口5a’の下方に向かって突出し内径が段々と縮
径する縮径部5c’を設けており、その下端の最も絞ら
れた部分が、第1の絞り5d’を構成する。又、遮光シ
ート8の中央開口8aが第2の絞りを構成する。保持部
材5’とフィルタ7’と遮光シート8とでカバー部材を
構成する。In FIG. 9, a holding member 5'having a thin light shielding sheet 8 attached to the upper surface of the upper portion 4b of the lens frame 4 is attached.
Are attached by an adhesive B. In the central opening 5a 'of the holding member 5'made of a light-shielding material,
A filter 7'made of a material having an infrared absorption characteristic is fitted and arranged. A taper surface 5b 'is formed on the upper edge of the opening 5a' of the holding member 5 ', and the adhesive B
By attaching the, the holding member 5'and the filter 7'can be joined. Furthermore, the holding member 5 '
Is provided with a diameter-reduced portion 5c 'which projects downward from the opening 5a' and whose inner diameter is gradually reduced, and the most narrowed portion at the lower end thereof constitutes a first aperture 5d '. Further, the central opening 8a of the light shielding sheet 8 constitutes a second diaphragm. The holding member 5 ′, the filter 7 ′, and the light shielding sheet 8 form a cover member.
【0050】本実施の形態によれば、保持部材5’とフ
ィルタ7’と遮光シート8とで構成するカバー部材を、
光学部材1のレンズ部1aより被写体側に配置している
ので、レンズ部1aを剥き出しにすることなく、その保
護が図れると共に、レンズ面への異物の付着防止も図れ
る。更に、かかるカバー部材は一体で形成できることか
ら、撮像装置全体の部品点数の削減に貢献する。According to this embodiment, the cover member composed of the holding member 5 ', the filter 7'and the light shielding sheet 8 is
Since the optical member 1 is arranged closer to the subject side than the lens portion 1a, the lens portion 1a can be protected without being exposed, and foreign matter can be prevented from adhering to the lens surface. Further, since the cover member can be integrally formed, it contributes to reduction of the number of parts of the entire image pickup apparatus.
【0051】上述の実施の形態と同様に、光学部材1の
脚部1cが、撮像素子2bの光電変換部2dの近くに配
置されているため、結像に寄与しない光束が脚部1cに
反射し、光電変換部2dに入射することで、ゴーストや
フレアが生じる原因となることが懸念される。本実施の
形態においては、レンズ部1aのFナンバーを規定する
第1の絞り5a’の被写体側に、周辺光束を規制する第
2の絞り(開口8a)を配置し不要光の入射を低減して
いる。なお、撮像素子2bの光電変換部2dの短辺・長
辺、対角方向で画角が異なるため、第2の絞りの開口8
aを矩形とすることで、より一層の効果が得られる。As in the above-described embodiment, the leg portion 1c of the optical member 1 is arranged near the photoelectric conversion portion 2d of the image pickup device 2b, so that a light beam that does not contribute to image formation is reflected by the leg portion 1c. However, there is a concern that ghost and flare may occur when the light enters the photoelectric conversion unit 2d. In the present embodiment, the second diaphragm (aperture 8a) that regulates the peripheral light flux is arranged on the subject side of the first diaphragm 5a 'that defines the F number of the lens unit 1a to reduce the incidence of unnecessary light. ing. Since the angle of view differs depending on the short side / long side and the diagonal direction of the photoelectric conversion unit 2d of the image pickup device 2b, the aperture 8 of the second diaphragm is formed.
By making a rectangular, a further effect can be obtained.
【0052】更に、本実施の形態においても、光学部材
1の段部1eを、所定の弾性力で光軸方向に押圧する、
付勢部材としての弾性手段6を設けているので、かかる
弾性手段6の弾性力を用いて、鏡枠4に対して光軸方向
に沿って、脚部1c(当接部1d)を撮像素子2bの周
囲面2aに適切な当接力(上述した5g以上500g以
下の当接力)で押しつけることができ、従って内側に回
路が配置された撮像素子2bの周囲面2aに過大なスト
レスを生じさせることがないし、振動で光学部材1がが
たつくこともないようになっている。Further, also in this embodiment, the step portion 1e of the optical member 1 is pressed in the optical axis direction by a predetermined elastic force.
Since the elastic means 6 as the urging member is provided, the leg portion 1c (contact portion 1d) is attached to the imaging element along the optical axis direction with respect to the lens frame 4 by using the elastic force of the elastic means 6. It can be pressed against the peripheral surface 2a of 2b with an appropriate contact force (contact force of 5g or more and 500g or less as described above), and therefore excessive stress is generated on the peripheral surface 2a of the image pickup device 2b in which the circuit is arranged inside. The optical member 1 does not rattle due to vibration.
【0053】図10は、弾性手段の別な変形例を含む撮
像装置の断面図である。図10の弾性手段26は、保持
部材すなわちカバー部材と一体になっている。図10か
ら明らかなように、保持部材26は、エラストマー樹脂
等の弾性変形しやすい樹脂材料からなり、図9の弾性手
段6を取り除き、図9の保持部材5’に対して、下面に
等間隔に4つ(2つのみ図示)の突起部(弾性手段)2
6eを形成した点のみが異なっている。保持部材26を
鏡枠4に接着剤Bにより固着し、突起部26eが弾性変
形することにより、光学部材1を所定の弾性力で撮像素
子2bの周囲面2aに対して付勢するようになってい
る。その他の構成に関しては、図9に示す実施の形態と
同様であるので、説明を省略する。FIG. 10 is a sectional view of an image pickup apparatus including another modification of the elastic means. The elastic means 26 of FIG. 10 is integrated with a holding member, that is, a cover member. As is apparent from FIG. 10, the holding member 26 is made of a resin material such as an elastomer resin that is easily elastically deformed, the elastic means 6 of FIG. 9 is removed, and the holding member 5 ′ of FIG. 4 (only two shown) protrusions (elastic means) 2
The only difference is that 6e is formed. By fixing the holding member 26 to the lens frame 4 with the adhesive B and elastically deforming the protrusion 26e, the optical member 1 is urged against the peripheral surface 2a of the image sensor 2b with a predetermined elastic force. ing. The other structure is similar to that of the embodiment shown in FIG.
【0054】図11は、第3の実施の形態にかかる撮像
装置を示す図である。第3の実施の形態においては、図
2の実施の形態に対して、複数のレンズ部を有するよう
に光学部材の構成を変更した点のみが主として異なるた
め、脚部と撮像素子との当接位置を含む、その他の同様
な構成に関しては、同一符号を付して説明を省略する。FIG. 11 is a diagram showing an image pickup apparatus according to the third embodiment. The third embodiment is different from the embodiment of FIG. 2 mainly in that the configuration of the optical member is changed so as to have a plurality of lens portions, so that the contact between the leg portion and the image sensor is achieved. With respect to other similar configurations including positions, the same reference numerals are given and description thereof is omitted.
【0055】図11において、光学部材19は、それぞ
れプラスチック材料からなる像側レンズ1’と被写体側
レンズ9とから構成されている。像側レンズ1’は、図
1に示す光学部材1と類似の形状を有しているが、上部
に形成されたリング部1f’の光軸方向高さが増大して
いる。リング部1f’の半径方向内側であって上面部1
b’の上方には、Fナンバーを規定する絞り板3を介し
て被写体側レンズ9が配置されている。被写体側レンズ
9は、リング部1f’の内周に嵌合するフランジ部9b
と、中央に形成されたレンズ部9aとから構成されてい
る。像側レンズ1’のレンズ部1a’が正のレンズであ
るのに対し、被写体側レンズ9のレンズ部9aは、負の
レンズとなっている。尚、本実施の形態では絞り板3
は、レンズ部1a’、9aのレンズ間距離を規制するス
ペーサとして機能し、且つ絞り板3の開口3aがFナン
バーを規定する第1の絞りとして機能する。In FIG. 11, the optical member 19 is composed of an image side lens 1 ′ and a subject side lens 9 each made of a plastic material. The image-side lens 1'has a shape similar to that of the optical member 1 shown in FIG. 1, but the height of the ring portion 1f 'formed on the upper side in the optical axis direction is increased. The inner surface of the ring portion 1f ′ in the radial direction and the upper surface portion 1
A subject-side lens 9 is arranged above b ′ via a diaphragm plate 3 that defines the F number. The subject side lens 9 has a flange portion 9b fitted to the inner circumference of the ring portion 1f '.
And a lens portion 9a formed in the center. The lens portion 1a 'of the image side lens 1'is a positive lens, whereas the lens portion 9a of the subject side lens 9 is a negative lens. In the present embodiment, the diaphragm plate 3
Serves as a spacer that regulates the distance between lenses of the lens portions 1a ′ and 9a, and the opening 3a of the diaphragm plate 3 functions as a first diaphragm that regulates the F number.
【0056】像側レンズ1’のリング部1f’の内周面
と、被写体側レンズ9のフランジ部9bの外周面とは、
互いに同径であり且つ光軸に平行になっているので、か
かる面同士が係合することにより、レンズ部1a’、9
aの光軸直交方向の位置決めを行うことができ、それら
の光軸を容易に一致させることができる。尚、像側レン
ズ1’に対して、被写体側レンズ9は、その周囲に付与
された接着剤Bにより接合されている。The inner peripheral surface of the ring portion 1f ′ of the image side lens 1 ′ and the outer peripheral surface of the flange portion 9b of the subject side lens 9 are
Since they have the same diameter as each other and are parallel to the optical axis, the lens portions 1a ′, 9
Positioning of a in the direction orthogonal to the optical axis can be performed, and those optical axes can be easily matched. The subject side lens 9 is bonded to the image side lens 1'by an adhesive B applied to the periphery thereof.
【0057】鏡枠4の上部4bの上端には、薄い遮光シ
ート8を上面に貼り付けた保持部材5’が、接着剤Bに
より取り付けられている。遮光性のある素材からなる保
持部材5’の中央の開口5a’内には、赤外線吸収特性
を有する素材からなるフィルタ7’が嵌合配置されてい
る。保持部材5’の開口5a’の上縁には、テーパ面5
b’が形成されており、ここに接着剤Bを付着させるこ
とによって、保持部材5’とフィルタ7’との接合を行
うことができる。更に、保持部材5’は、開口5a’の
下方に向かって突出し内径が段々と縮径する縮径部5
c’を設けているが、かかる部分は、不要光の侵入を抑
制する遮光部として機能する。尚、遮光シート8の中央
開口8aが第2の絞りを構成する。On the upper end of the upper portion 4b of the lens frame 4, a holding member 5'having a thin light-shielding sheet 8 attached on its upper surface is attached by an adhesive B. A filter 7'made of a material having an infrared absorbing property is fitted and arranged in an opening 5a 'at the center of a holding member 5'made of a light-shielding material. At the upper edge of the opening 5a 'of the holding member 5', the tapered surface 5
b'is formed, and by attaching the adhesive B thereto, the holding member 5'and the filter 7'can be joined. Further, the holding member 5 ′ has a reduced diameter portion 5 that protrudes downward of the opening 5a ′ and has a gradually reduced inner diameter.
Although c'is provided, such a portion functions as a light shielding portion that suppresses intrusion of unnecessary light. The central opening 8a of the light shielding sheet 8 constitutes a second diaphragm.
【0058】更に、本実施の形態においても、光学部材
19の段部1e’を、所定の弾性力で光軸方向に押圧す
る、付勢部材としての弾性手段6を設けているので、か
かる弾性手段6の弾性力を用いて、鏡枠4に対して光軸
方向に沿って、脚部1c’(当接部1d’)を撮像素子
2bの周囲面2aに適切な当接力(上述した5g以上5
00g以下の当接力)で押しつけることができ、従って
内側に回路が配置された撮像素子2bの周囲面2aに過
大なストレスを生じさせることがないし、振動で光学部
材19ががたつくこともないようになっている。Further, also in the present embodiment, since the elastic means 6 as a biasing member for pressing the step portion 1e 'of the optical member 19 in the optical axis direction with a predetermined elastic force is provided, such elasticity is obtained. By using the elastic force of the means 6, the leg portion 1c ′ (contact portion 1d ′) is appropriately contacted with the peripheral surface 2a of the image sensor 2b along the optical axis direction with respect to the lens frame 4 (5g described above). Above 5
It can be pressed with a contact force of 100 g or less), so that the surrounding surface 2a of the image pickup device 2b having the circuit inside is not excessively stressed, and the optical member 19 is prevented from rattling due to vibration. Has become.
【0059】図12は、弾性手段の更に別な変形例の斜
視図である。図12の弾性手段36は、光学部材と一体
になっており、例えば弾性手段6を省略した図1の撮像
装置に組み込み可能なものである。図12から明らかな
ように、光学部材36は、図1の光学部材1に対して、
段部36eに、等間隔に4つ(3つのみ図示)の突起部
(弾性手段)36fと、それを支持するアーム部36g
を形成した点のみが異なっている。図1に示すごとく光
学部材36を組み付けた状態では、突起部36gが遮光
板5(図1)の下面に当接するようになっており、それ
により片持ちのアーム36gが弾性変形し、その結果生
じる弾性力により、光学部材1を所定の弾性力で撮像素
子2bの周囲面2aに対して付勢するようになっている
(図1)。その他の構成に関しては、図1に示す実施の
形態と同様であるので、説明を省略する。FIG. 12 is a perspective view of another modification of the elastic means. The elastic means 36 of FIG. 12 is integrated with the optical member, and can be incorporated in the image pickup apparatus of FIG. 1 in which the elastic means 6 is omitted, for example. As is clear from FIG. 12, the optical member 36 is different from the optical member 1 of FIG.
On the step portion 36e, four protrusion portions (elastic means) 36f at equal intervals and an arm portion 36g for supporting the protrusion portions 36f.
The only difference is the formation of. In the state where the optical member 36 is assembled as shown in FIG. 1, the protrusion 36g comes into contact with the lower surface of the light shielding plate 5 (FIG. 1), which elastically deforms the cantilevered arm 36g. The generated elastic force urges the optical member 1 against the peripheral surface 2a of the image pickup device 2b with a predetermined elastic force (FIG. 1). The other configurations are similar to those of the embodiment shown in FIG.
【0060】図13は、弾性手段の更に別な変形例を含
む撮像装置の断面図である。図13の弾性手段は、鏡枠
と一体になっている。図13から明らかなように、鏡枠
46は、図1の鏡枠4に対して、上半部46bに、等間
隔に4つ(2つのみ図示)の切欠46dを形成してお
り、かかる切欠46dの図13で下縁に、光軸に平行に
延在するアーム46eの下端を接続している。アーム4
6eの上端には、光軸直角方向内向きに突出した、断面
が略三角形状の突起部46fが形成されている。尚、光
学部材1の段部1eの上部は、図13に示すようにテー
パ形状となっていると好ましい。アーム46eと突起部
46fとで弾性手段を構成する。FIG. 13 is a sectional view of an image pickup apparatus including still another modification of the elastic means. The elastic means shown in FIG. 13 is integrated with the lens frame. As is apparent from FIG. 13, the lens frame 46 has four notches 46d (only two are shown) formed at equal intervals in the upper half portion 46b of the lens frame 4 of FIG. The lower end of the arm 46e extending parallel to the optical axis is connected to the lower edge of the notch 46d in FIG. Arm 4
At the upper end of 6e, a protrusion 46f having a substantially triangular cross section is formed so as to protrude inward in the direction perpendicular to the optical axis. The upper portion of the step portion 1e of the optical member 1 is preferably tapered as shown in FIG. The arm 46e and the projection 46f constitute an elastic means.
【0061】基板PCに取り付けられた鏡枠46内に、
光学部材1を図13の上方から挿入する際は、突起部4
6fに段部1eが当接して、アーム46eを光軸直角方
向外向きに押し広げるように弾性変形させるため、光学
部材1の組み込みは容易である。一方、図13に示す位
置まで、光学部材1が組み付けられたときは、アーム4
6eの変形が復帰するが、その復帰は完全ではなく若干
変形が残るように突起部46fの形状が決められてい
る。従って、その結果生じる弾性力により、突起部46
fは、矢印の方向に段部1eを付勢し、それにより光学
部材1を所定の弾性力で撮像素子2bの周囲面2aに対
して付勢するようになっている。その他の構成に関して
は、図1に示す実施の形態と同様であるので、説明を省
略する。尚、本実施の形態においては、アーム46eと
突起部46fを形成する構造上、このままでは十分な防
塵・防湿機能を発揮することができない。これに対し、
たとえば鏡枠46の弾性構造部(46e、46f)のス
キマを別部材で覆うことにより所望の防塵・防湿機能を
発揮させることができる。In the lens frame 46 attached to the substrate PC,
When the optical member 1 is inserted from above in FIG.
Since the stepped portion 1e contacts the 6f and elastically deforms the arm 46e so as to push it outward in the direction perpendicular to the optical axis, the optical member 1 can be easily incorporated. On the other hand, when the optical member 1 is assembled up to the position shown in FIG.
Although the deformation of 6e is restored, the shape of the protrusion 46f is determined so that the restoration is not complete and some deformation remains. Therefore, due to the resulting elastic force, the protrusion 46
f biases the stepped portion 1e in the direction of the arrow, thereby biasing the optical member 1 against the peripheral surface 2a of the image sensor 2b with a predetermined elastic force. The other configurations are similar to those of the embodiment shown in FIG. In the present embodiment, due to the structure of forming the arm 46e and the protrusion 46f, the dust-proof and moisture-proof functions cannot be sufficiently exerted as they are. In contrast,
For example, by covering the skimmer of the elastic structure portions (46e, 46f) of the lens frame 46 with another member, desired dustproof and moistureproof functions can be exhibited.
【0062】更に、弾性手段の他の例としては、以上述
べた他にも、波ばねや、皿ばねの組み合わせを用いても
良い。Furthermore, as another example of the elastic means, a combination of a wave spring and a disc spring may be used in addition to those described above.
【0063】以上、本発明を実施の形態を参照して説明
してきたが、本発明は上記実施の形態に限定して解釈さ
れるべきではなく、適宜変更・改良が可能であることは
もちろんである。例えば、本実施の形態では、撮像素子
2bと基板PCとの接続は、ワイヤWにより行っている
が、撮像素子2bの内部に配線をはわせて、撮像素子2
bの背面(光電変換部と反対側)又は側面より、信号を
取り出す構成であってもよい。かかる構成によれば、撮
像素子の周囲面を広く確保できると共に、結線を容易に
行うことができる。更に、本実施の形態では、撮像ユニ
ットをベアチップである撮像素子のみから構成したが、
その上面又は下面にガラスなどの保護部材を張り付ける
ことで、一体形の撮像ユニットを構成することでき、そ
のような撮像ユニットを用いてもよい。又、基板は、ハ
ードなものに限らず、フレキシブルなものであっても良
い。また、以上の説明では、好ましい実施の態様とし
て、光学部材の脚部を撮像素子のレンズ部に向いた面に
当接する態様を示したが、例えば、脚部をレンズ部に向
いた面のみならず、その面に交差する撮像素子の側面に
も当接する構成にしても良く、また更には、例えば、脚
部を撮像素子に当接させる態様ではなく、撮像装置の基
板に当接させる構成にしても良く、それらのような構成
でも、弾性手段の弾性力により長期にわたってレンズの
がたつきや外力による損傷を抑制できるという効果を奏
するものである。勿論脚部を撮像素子のレンズ部に向い
た面に当接する態様にすることが、レンズの像点位置に
適合するように、撮像素子に当接される脚部の長さ寸法
を適宜設計することで、無調整であっても精度良く組み
付けできる信頼性の高い撮像装置を得ることができる上
で特に好ましいものである。本発明の撮像装置は、携帯
電話、パソコン、PDA、AV装置、テレビ、家庭電化
製品など種々のものに組み込むことが可能である。Although the present invention has been described above with reference to the embodiments, the present invention should not be construed as being limited to the above embodiments, and it goes without saying that appropriate modifications and improvements are possible. is there. For example, in the present embodiment, the image sensor 2b and the substrate PC are connected by the wire W, but the image sensor 2 is provided with wiring inside.
The signal may be taken out from the back surface (the side opposite to the photoelectric conversion unit) or the side surface of b. With such a configuration, it is possible to secure a wide peripheral surface of the image sensor and easily connect the wires. Further, in the present embodiment, the image pickup unit is composed of only the image pickup element which is a bare chip,
By attaching a protective member such as glass to the upper surface or the lower surface thereof, an integrated image pickup unit can be configured, and such an image pickup unit may be used. The substrate is not limited to a hard substrate, but may be a flexible substrate. Further, in the above description, a mode in which the leg portion of the optical member is brought into contact with the surface of the image pickup element facing the lens portion has been described as a preferred embodiment. Alternatively, the side surface of the image pickup element that intersects the surface may be in contact with the side surface of the image pickup element. Further, for example, the leg portion is not in contact with the image pickup element, but is in contact with the board of the image pickup apparatus. Even with such a configuration, the effect that the rattling of the lens and the damage due to the external force can be suppressed for a long period of time by the elastic force of the elastic means. Of course, the aspect in which the leg portion is brought into contact with the surface of the image pickup element facing the lens portion appropriately designs the length dimension of the leg portion brought into contact with the image pickup element so as to match the image point position of the lens. This is particularly preferable in that it is possible to obtain a highly reliable imaging device that can be assembled with high accuracy even without adjustment. The image pickup device of the present invention can be incorporated into various devices such as a mobile phone, a personal computer, a PDA, an AV device, a television, and a home electric appliance.
【0064】[0064]
【発明の効果】本発明によれば、安価でありながら、部
品点数を削減でき、小型化が図れ、長期にわたってレン
ズのがたつきや外力による損傷を抑制でき、また更に、
無調整であっても精度良く組み付けでき、さらには防
塵、防湿の構造を有し、また信頼性の高い撮像装置を提
供することができる。According to the present invention, the number of parts can be reduced, the size can be reduced, and the rattling of the lens and the damage due to external force can be suppressed for a long period of time, while being inexpensive.
It is possible to provide an image pickup apparatus which can be assembled accurately without adjustment, has a dustproof and moistureproof structure, and has high reliability.
【図1】第1の実施の形態にかかる撮像装置の断面図で
ある。FIG. 1 is a sectional view of an image pickup apparatus according to a first embodiment.
【図2】図1の撮像装置の斜視図である。FIG. 2 is a perspective view of the image pickup apparatus in FIG.
【図3】光学部材の斜視図である。FIG. 3 is a perspective view of an optical member.
【図4】光学部材の下面図である。FIG. 4 is a bottom view of an optical member.
【図5】撮像素子の上面図である。FIG. 5 is a top view of the image sensor.
【図6】従来技術の撮像装置の一例を示す断面図FIG. 6 is a cross-sectional view showing an example of a conventional imaging device.
【図7】弾性手段の変形例を含む撮像装置の断面図であ
る。FIG. 7 is a cross-sectional view of an image pickup apparatus including a modification of elastic means.
【図8】光学部材と弾性手段とを分解した状態で示す斜
視図である。FIG. 8 is a perspective view showing an optical member and elastic means in a disassembled state.
【図9】第2の実施の形態にかかる撮像装置の断面図で
ある。FIG. 9 is a cross-sectional view of the image pickup apparatus according to the second embodiment.
【図10】弾性手段の別な変形例を含む撮像装置の断面
図である。FIG. 10 is a cross-sectional view of an image pickup apparatus including another modification of elastic means.
【図11】第3の実施の形態にかかる撮像装置の断面図
である。FIG. 11 is a cross-sectional view of an image pickup apparatus according to a third embodiment.
【図12】弾性手段の別な変形例の斜視図である。FIG. 12 is a perspective view of another modification of the elastic means.
【図13】弾性手段の別な変形例を含む撮像装置の断面
図である。FIG. 13 is a cross-sectional view of an imaging device including another modification of elastic means.
1、11、19、36 光学部材 1a、1a’ レンズ部 1c 脚部 1d 当接部 2 撮像ユニット 2a 周囲面 2b 撮像素子 2d 光電変換部 3 絞り板 4、46 鏡枠 5、15 遮光板 6 弾性手段 7 フィルタ 8 遮光シート 9 被写体側レンズ 9a レンズ部 16 弾性部材 1’ 像側レンズ 5’、26 保持部材 7’ フィルタ 1, 11, 19, 36 Optical member 1a, 1a 'lens part 1c leg 1d contact part 2 Imaging unit 2a Surrounding surface 2b image sensor 2d photoelectric converter 3 diaphragm 4,46 mirror frame 5,15 Light shield 6 Elastic means 7 filters 8 Light-shielding sheet 9 Subject side lens 9a lens part 16 Elastic member 1'Image side lens 5 ', 26 holding member 7'filter
フロントページの続き (72)発明者 本田 裕一 東京都八王子市石川町2970番地 コニカ株 式会社内 Fターム(参考) 2H044 AA15 AB15 AD02 AD03 AG01 5C022 AA12 AA13 AB12 AB13 AC42 AC54 AC55 AC65 AC66 AC70Continued front page (72) Inventor Yuichi Honda 2970 Ishikawa-cho, Hachioji-shi, Tokyo Konica stock Inside the company F-term (reference) 2H044 AA15 AB15 AD02 AD03 AG01 5C022 AA12 AA13 AB12 AB13 AC42 AC54 AC55 AC65 AC66 AC70
Claims (11)
と、 前記撮像素子に備えられる前記光電変換部に被写体像を
結像させるレンズ部と、前記レンズ部を支持する脚部と
を備えた光学部材と、 弾性手段と、を有し、 前記弾性手段の弾性力により、前記光学部材は前記撮像
素子に向かって付勢されていることを特徴とする撮像装
置。1. A substrate, a photoelectric conversion unit, an image sensor mounted on the substrate, a lens unit for forming a subject image on the photoelectric conversion unit included in the image sensor, and the lens unit. An image pickup device, comprising: an optical member having a leg portion for supporting the optical member; and an elastic member, wherein the optical member is biased toward the image pickup element by the elastic force of the elastic member. apparatus.
は、5g以上500g以下の荷重で、前記撮像素子にお
ける前記レンズ部に向いた表面に当接していることを特
徴とする請求項1に記載の撮像装置。2. The leg portion is brought into contact with the surface of the image pickup element facing the lens portion with a load of 5 g or more and 500 g or less due to the elastic force of the elastic means. The imaging device according to.
れ、前記レンズ部より被写体側に配置され、前記弾性手
段を押圧し、少なくとも一部が光を透過可能なカバー部
材を有することを特徴とする請求項1又は2に記載の撮
像装置。3. A cover member which is attached to a lens frame fixed to the substrate, is arranged closer to the subject than the lens portion, presses the elastic means, and at least a part of which has a cover member capable of transmitting light. The imaging device according to claim 1 or 2.
カバー部材と別体で構成されることを特徴とする請求項
3に記載の撮像装置。4. The image pickup apparatus according to claim 3, wherein the elastic means is configured separately from the optical member and the cover member.
特徴とする請求項1乃至る4のいずれかに記載の撮像装
置。5. The image pickup apparatus according to claim 1, wherein the elastic means is a coil spring.
ト状部材であることを特徴とする請求項1乃至4のいず
れかに記載の撮像装置。6. The image pickup apparatus according to claim 1, wherein the elastic means is a sheet-shaped member having an opening at the center.
材からなり、前記レンズ部のFナンバーを規定する絞り
の機能を兼ねることを特徴とする請求項6に記載の撮像
装置。7. The image pickup apparatus according to claim 6, wherein the sheet-shaped member is made of a member having a light-shielding property, and also has a function of an aperture that defines an F number of the lens portion.
化されていることを特徴とする請求項3に記載の撮像装
置。8. The image pickup apparatus according to claim 3, wherein the elastic means is integrated with the cover member.
されていることを特徴とする請求項3に記載の撮像装
置。9. The image pickup apparatus according to claim 3, wherein the elastic means is integrated with the optical member.
と、 前記撮像素子に備えられる前記光電変換部に被写体像を
結像させるレンズ部と、前記レンズ部を支持する脚部と
を備えた光学部材と、 前記光学部材を支持すると共に、弾性手段を備えた鏡枠
と、を有し、 前記弾性手段の弾性力により、前記光学部材は前記撮像
素子に向かって付勢されていることを特徴とする撮像装
置。10. A substrate, a photoelectric conversion unit, an image sensor mounted on the substrate, a lens unit for forming a subject image on the photoelectric conversion unit included in the image sensor, and the lens unit. An optical member having a leg portion for supporting the optical member, and a lens frame having the elastic member while supporting the optical member, and the elastic member elastic force causes the optical member to move to the image sensor. An imaging device characterized by being biased toward.
部は、5g以上500g以下の荷重で、前記撮像素子に
おける前記レンズ部に向いた表面に当接していることを
特徴とする請求項10に記載の撮像装置。11. The leg portion is brought into contact with the surface of the image pickup element facing the lens portion under a load of 5 g or more and 500 g or less due to the elastic force of the elastic means. The imaging device according to.
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